./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi009_power.oepc.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/rfi009_power.oepc.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/rfi009_power.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/rfi009_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 00:03:23,719 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:03:23,837 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:03:23,841 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:03:23,842 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:03:23,862 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:03:23,864 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:03:23,865 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:03:23,866 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:03:23,866 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:03:23,867 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:03:23,867 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:03:23,869 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:03:23,871 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:03:23,871 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:03:23,871 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:03:23,872 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:03:23,877 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:03:23,878 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:03:23,878 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:03:23,878 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:03:23,880 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:03:23,880 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:03:23,880 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:03:23,881 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:03:23,881 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:03:23,881 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:03:23,881 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:03:23,882 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:03:23,882 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:03:23,882 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:03:23,883 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:03:23,883 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:03:23,883 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:03:23,884 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:03:23,884 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:03:23,884 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:03:23,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:03:23,885 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:03:23,885 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:03:23,886 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:03:23,886 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:03:23,886 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:03:23,886 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 00:03:24,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:03:24,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:03:24,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:03:24,178 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:03:24,179 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:03:24,180 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/rfi009_power.oepc.yml/witness.yml [2024-06-28 00:03:24,248 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:03:24,248 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:03:24,249 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi009_power.oepc.i [2024-06-28 00:03:25,377 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:03:25,639 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:03:25,643 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi009_power.oepc.i [2024-06-28 00:03:25,681 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8e003d70/ed375aec6a78441495e62b504136ff0d/FLAGc4e8785df [2024-06-28 00:03:25,698 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8e003d70/ed375aec6a78441495e62b504136ff0d [2024-06-28 00:03:25,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:03:25,700 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:03:25,701 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:03:25,701 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:03:25,705 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:03:25,706 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:03:24" (1/2) ... [2024-06-28 00:03:25,707 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d788b14 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:03:25, skipping insertion in model container [2024-06-28 00:03:25,707 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:03:24" (1/2) ... [2024-06-28 00:03:25,709 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@453c9e21 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:03:25, skipping insertion in model container [2024-06-28 00:03:25,710 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:03:25" (2/2) ... [2024-06-28 00:03:25,710 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d788b14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:03:25, skipping insertion in model container [2024-06-28 00:03:25,711 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:03:25" (2/2) ... [2024-06-28 00:03:25,711 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:03:25,735 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:03:25,736 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ! multithreaded || (((((0LL - (long long )__unbuffered_p0_EBX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) [2024-06-28 00:03:25,736 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] ! multithreaded || (((((0LL - (long long )__unbuffered_p0_EBX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) [2024-06-28 00:03:25,736 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ! multithreaded || (((((0LL - (long long )__unbuffered_p0_EBX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) [2024-06-28 00:03:25,736 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:03:25,737 INFO L106 edCorrectnessWitness]: ghost_update [L851-L851] multithreaded = 1; [2024-06-28 00:03:25,783 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:03:26,154 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:03:26,168 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:03:26,296 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:03:26,329 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:03:26,330 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:03:26 WrapperNode [2024-06-28 00:03:26,330 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:03:26,331 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:03:26,331 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:03:26,331 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:03:26,336 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:03:26" (1/1) ... [2024-06-28 00:03:26,348 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:03:26" (1/1) ... [2024-06-28 00:03:26,384 INFO L138 Inliner]: procedures = 175, calls = 70, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 155 [2024-06-28 00:03:26,385 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:03:26,385 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:03:26,385 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:03:26,386 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:03:26,396 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:03:26" (1/1) ... [2024-06-28 00:03:26,397 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:03:26" (1/1) ... [2024-06-28 00:03:26,401 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:03:26" (1/1) ... [2024-06-28 00:03:26,423 INFO L175 MemorySlicer]: Split 29 memory accesses to 2 slices as follows [27, 2]. 93 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [1, 2]. The 7 writes are split as follows [7, 0]. [2024-06-28 00:03:26,424 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:03:26" (1/1) ... [2024-06-28 00:03:26,424 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:03:26" (1/1) ... [2024-06-28 00:03:26,434 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:03:26" (1/1) ... [2024-06-28 00:03:26,436 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:03:26" (1/1) ... [2024-06-28 00:03:26,439 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:03:26" (1/1) ... [2024-06-28 00:03:26,441 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:03:26" (1/1) ... [2024-06-28 00:03:26,445 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:03:26,446 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:03:26,446 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:03:26,446 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:03:26,447 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:03:26" (1/1) ... [2024-06-28 00:03:26,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:03:26,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:03:26,474 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 00:03:26,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 00:03:26,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 00:03:26,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 00:03:26,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 00:03:26,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 00:03:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:03:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:03:26,521 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 00:03:26,526 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 00:03:26,526 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 00:03:26,526 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 00:03:26,526 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 00:03:26,526 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 00:03:26,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:03:26,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 00:03:26,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:03:26,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:03:26,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:03:26,529 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:03:26,681 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:03:26,682 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:03:27,064 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:03:27,065 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:03:27,436 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:03:27,436 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 00:03:27,437 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:03:27 BoogieIcfgContainer [2024-06-28 00:03:27,437 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:03:27,440 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:03:27,440 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:03:27,443 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:03:27,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:03:24" (1/4) ... [2024-06-28 00:03:27,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d2cb9d7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:03:27, skipping insertion in model container [2024-06-28 00:03:27,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:03:25" (2/4) ... [2024-06-28 00:03:27,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d2cb9d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:03:27, skipping insertion in model container [2024-06-28 00:03:27,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:03:26" (3/4) ... [2024-06-28 00:03:27,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d2cb9d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:03:27, skipping insertion in model container [2024-06-28 00:03:27,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:03:27" (4/4) ... [2024-06-28 00:03:27,450 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi009_power.oepc.i [2024-06-28 00:03:27,470 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:03:27,470 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 00:03:27,470 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:03:27,537 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 00:03:27,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 00:03:27,593 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-28 00:03:27,593 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:03:27,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 00:03:27,596 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 00:03:27,603 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-28 00:03:27,616 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:03:27,624 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;@2b1b793c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:03:27,624 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 00:03:27,629 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:03:27,629 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 00:03:27,630 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:03:27,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:27,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:03:27,631 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:27,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:27,636 INFO L85 PathProgramCache]: Analyzing trace with hash 696732841, now seen corresponding path program 1 times [2024-06-28 00:03:27,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:27,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119164884] [2024-06-28 00:03:27,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:27,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:28,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:28,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119164884] [2024-06-28 00:03:28,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119164884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:28,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:28,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:03:28,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070613613] [2024-06-28 00:03:28,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:28,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:03:28,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:28,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:03:28,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:03:28,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-28 00:03:28,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:28,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:28,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-28 00:03:28,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:28,424 INFO L124 PetriNetUnfolderBase]: 354/683 cut-off events. [2024-06-28 00:03:28,424 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-06-28 00:03:28,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1291 conditions, 683 events. 354/683 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3715 event pairs, 186 based on Foata normal form. 1/633 useless extension candidates. Maximal degree in co-relation 1279. Up to 561 conditions per place. [2024-06-28 00:03:28,431 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 30 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-28 00:03:28,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 173 flow [2024-06-28 00:03:28,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:03:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:03:28,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-06-28 00:03:28,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-28 00:03:28,444 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 79 transitions. [2024-06-28 00:03:28,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 173 flow [2024-06-28 00:03:28,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:03:28,448 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-28 00:03:28,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-28 00:03:28,452 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-28 00:03:28,452 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-28 00:03:28,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:28,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:28,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:28,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:03:28,453 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:28,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:28,454 INFO L85 PathProgramCache]: Analyzing trace with hash -454587416, now seen corresponding path program 1 times [2024-06-28 00:03:28,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:28,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858297409] [2024-06-28 00:03:28,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:28,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:29,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:29,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858297409] [2024-06-28 00:03:29,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858297409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:29,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:29,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:03:29,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860157247] [2024-06-28 00:03:29,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:29,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:03:29,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:29,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:03:29,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:03:29,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-28 00:03:29,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:29,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:29,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-28 00:03:29,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:29,257 INFO L124 PetriNetUnfolderBase]: 345/645 cut-off events. [2024-06-28 00:03:29,257 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-06-28 00:03:29,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1458 conditions, 645 events. 345/645 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3532 event pairs, 117 based on Foata normal form. 6/617 useless extension candidates. Maximal degree in co-relation 1446. Up to 508 conditions per place. [2024-06-28 00:03:29,264 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 27 selfloop transitions, 5 changer transitions 0/43 dead transitions. [2024-06-28 00:03:29,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 184 flow [2024-06-28 00:03:29,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:03:29,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:03:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-06-28 00:03:29,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-28 00:03:29,268 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 3 states and 75 transitions. [2024-06-28 00:03:29,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 184 flow [2024-06-28 00:03:29,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:03:29,271 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 125 flow [2024-06-28 00:03:29,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-28 00:03:29,274 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2024-06-28 00:03:29,274 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 125 flow [2024-06-28 00:03:29,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:29,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:29,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:29,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:03:29,288 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:29,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:29,290 INFO L85 PathProgramCache]: Analyzing trace with hash -672692856, now seen corresponding path program 1 times [2024-06-28 00:03:29,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:29,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344875209] [2024-06-28 00:03:29,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:29,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:29,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:29,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344875209] [2024-06-28 00:03:29,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344875209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:29,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:29,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:03:29,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230619423] [2024-06-28 00:03:29,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:29,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:03:29,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:29,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:03:29,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:03:29,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:29,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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) [2024-06-28 00:03:29,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:29,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:29,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:29,659 INFO L124 PetriNetUnfolderBase]: 617/1076 cut-off events. [2024-06-28 00:03:29,660 INFO L125 PetriNetUnfolderBase]: For 440/440 co-relation queries the response was YES. [2024-06-28 00:03:29,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2624 conditions, 1076 events. 617/1076 cut-off events. For 440/440 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5608 event pairs, 330 based on Foata normal form. 2/1039 useless extension candidates. Maximal degree in co-relation 2610. Up to 943 conditions per place. [2024-06-28 00:03:29,686 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 38 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-28 00:03:29,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 261 flow [2024-06-28 00:03:29,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:03:29,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:03:29,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-28 00:03:29,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-28 00:03:29,690 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 125 flow. Second operand 4 states and 93 transitions. [2024-06-28 00:03:29,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 261 flow [2024-06-28 00:03:29,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:03:29,692 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 160 flow [2024-06-28 00:03:29,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-28 00:03:29,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-28 00:03:29,694 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 160 flow [2024-06-28 00:03:29,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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) [2024-06-28 00:03:29,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:29,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:29,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:03:29,694 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:29,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:29,695 INFO L85 PathProgramCache]: Analyzing trace with hash 621359561, now seen corresponding path program 1 times [2024-06-28 00:03:29,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:29,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276425763] [2024-06-28 00:03:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:29,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:29,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:29,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276425763] [2024-06-28 00:03:29,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276425763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:29,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:29,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:03:29,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916097533] [2024-06-28 00:03:29,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:29,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:03:29,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:29,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:03:29,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:03:29,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:29,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 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) [2024-06-28 00:03:29,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:29,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:29,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:30,114 INFO L124 PetriNetUnfolderBase]: 612/1089 cut-off events. [2024-06-28 00:03:30,115 INFO L125 PetriNetUnfolderBase]: For 840/840 co-relation queries the response was YES. [2024-06-28 00:03:30,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2897 conditions, 1089 events. 612/1089 cut-off events. For 840/840 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5736 event pairs, 318 based on Foata normal form. 2/1069 useless extension candidates. Maximal degree in co-relation 2881. Up to 925 conditions per place. [2024-06-28 00:03:30,120 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 43 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-06-28 00:03:30,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 62 transitions, 328 flow [2024-06-28 00:03:30,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:03:30,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:03:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-28 00:03:30,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380952380952381 [2024-06-28 00:03:30,124 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 160 flow. Second operand 5 states and 113 transitions. [2024-06-28 00:03:30,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 62 transitions, 328 flow [2024-06-28 00:03:30,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 312 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-28 00:03:30,130 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 194 flow [2024-06-28 00:03:30,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-28 00:03:30,132 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-28 00:03:30,132 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 194 flow [2024-06-28 00:03:30,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 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) [2024-06-28 00:03:30,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:30,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:30,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:03:30,133 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:30,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:30,134 INFO L85 PathProgramCache]: Analyzing trace with hash -700545157, now seen corresponding path program 1 times [2024-06-28 00:03:30,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:30,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045398694] [2024-06-28 00:03:30,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:30,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:30,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:30,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045398694] [2024-06-28 00:03:30,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045398694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:30,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:30,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:03:30,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856864080] [2024-06-28 00:03:30,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:30,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:03:30,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:30,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:03:30,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:03:30,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:30,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 194 flow. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 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) [2024-06-28 00:03:30,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:30,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:30,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:30,672 INFO L124 PetriNetUnfolderBase]: 607/1077 cut-off events. [2024-06-28 00:03:30,672 INFO L125 PetriNetUnfolderBase]: For 1268/1268 co-relation queries the response was YES. [2024-06-28 00:03:30,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3140 conditions, 1077 events. 607/1077 cut-off events. For 1268/1268 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5653 event pairs, 238 based on Foata normal form. 2/1051 useless extension candidates. Maximal degree in co-relation 3123. Up to 893 conditions per place. [2024-06-28 00:03:30,679 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 43 selfloop transitions, 11 changer transitions 0/63 dead transitions. [2024-06-28 00:03:30,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 63 transitions, 366 flow [2024-06-28 00:03:30,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:03:30,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:03:30,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-28 00:03:30,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-28 00:03:30,681 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 194 flow. Second operand 4 states and 95 transitions. [2024-06-28 00:03:30,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 63 transitions, 366 flow [2024-06-28 00:03:30,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 63 transitions, 340 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 00:03:30,683 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 247 flow [2024-06-28 00:03:30,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=247, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2024-06-28 00:03:30,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-28 00:03:30,684 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 247 flow [2024-06-28 00:03:30,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 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) [2024-06-28 00:03:30,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:30,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:30,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:03:30,685 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:30,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:30,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1852515251, now seen corresponding path program 1 times [2024-06-28 00:03:30,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:30,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628784577] [2024-06-28 00:03:30,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:30,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:30,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:30,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628784577] [2024-06-28 00:03:30,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628784577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:30,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:30,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:03:30,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960169808] [2024-06-28 00:03:30,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:30,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:03:30,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:30,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:03:30,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:03:30,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:30,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 247 flow. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:30,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:30,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:30,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:31,218 INFO L124 PetriNetUnfolderBase]: 595/1064 cut-off events. [2024-06-28 00:03:31,218 INFO L125 PetriNetUnfolderBase]: For 1874/1880 co-relation queries the response was YES. [2024-06-28 00:03:31,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3351 conditions, 1064 events. 595/1064 cut-off events. For 1874/1880 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5595 event pairs, 200 based on Foata normal form. 12/1053 useless extension candidates. Maximal degree in co-relation 3332. Up to 787 conditions per place. [2024-06-28 00:03:31,228 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 55 selfloop transitions, 18 changer transitions 0/82 dead transitions. [2024-06-28 00:03:31,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 82 transitions, 521 flow [2024-06-28 00:03:31,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:03:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:03:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-28 00:03:31,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5515873015873016 [2024-06-28 00:03:31,230 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 247 flow. Second operand 6 states and 139 transitions. [2024-06-28 00:03:31,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 82 transitions, 521 flow [2024-06-28 00:03:31,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 82 transitions, 515 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-28 00:03:31,234 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 334 flow [2024-06-28 00:03:31,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=334, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-28 00:03:31,235 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-28 00:03:31,235 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 334 flow [2024-06-28 00:03:31,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:31,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:31,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:31,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:03:31,236 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:31,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:31,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1089979998, now seen corresponding path program 1 times [2024-06-28 00:03:31,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:31,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719562877] [2024-06-28 00:03:31,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:31,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:31,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:31,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719562877] [2024-06-28 00:03:31,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719562877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:31,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:31,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:31,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553289437] [2024-06-28 00:03:31,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:31,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:31,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:31,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:31,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:31,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:03:31,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 334 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:31,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:31,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:03:31,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:31,966 INFO L124 PetriNetUnfolderBase]: 750/1343 cut-off events. [2024-06-28 00:03:31,966 INFO L125 PetriNetUnfolderBase]: For 3180/3184 co-relation queries the response was YES. [2024-06-28 00:03:31,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4610 conditions, 1343 events. 750/1343 cut-off events. For 3180/3184 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7462 event pairs, 147 based on Foata normal form. 12/1338 useless extension candidates. Maximal degree in co-relation 4586. Up to 916 conditions per place. [2024-06-28 00:03:31,974 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 80 selfloop transitions, 25 changer transitions 0/113 dead transitions. [2024-06-28 00:03:31,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 113 transitions, 798 flow [2024-06-28 00:03:31,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:31,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:31,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-28 00:03:31,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148809523809523 [2024-06-28 00:03:31,976 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 334 flow. Second operand 8 states and 173 transitions. [2024-06-28 00:03:31,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 113 transitions, 798 flow [2024-06-28 00:03:31,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 113 transitions, 756 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-28 00:03:31,982 INFO L231 Difference]: Finished difference. Result has 67 places, 72 transitions, 512 flow [2024-06-28 00:03:31,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=512, PETRI_PLACES=67, PETRI_TRANSITIONS=72} [2024-06-28 00:03:31,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-28 00:03:31,983 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 72 transitions, 512 flow [2024-06-28 00:03:31,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:31,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:31,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:31,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:03:31,984 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:31,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:31,984 INFO L85 PathProgramCache]: Analyzing trace with hash -51245690, now seen corresponding path program 2 times [2024-06-28 00:03:31,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:31,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157411581] [2024-06-28 00:03:31,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:31,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:32,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:32,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157411581] [2024-06-28 00:03:32,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157411581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:32,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:32,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:03:32,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688684900] [2024-06-28 00:03:32,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:32,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:03:32,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:32,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:03:32,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:03:32,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:32,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 72 transitions, 512 flow. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:32,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:32,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:32,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:32,521 INFO L124 PetriNetUnfolderBase]: 783/1410 cut-off events. [2024-06-28 00:03:32,522 INFO L125 PetriNetUnfolderBase]: For 5161/5167 co-relation queries the response was YES. [2024-06-28 00:03:32,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5466 conditions, 1410 events. 783/1410 cut-off events. For 5161/5167 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7866 event pairs, 176 based on Foata normal form. 5/1373 useless extension candidates. Maximal degree in co-relation 5438. Up to 1009 conditions per place. [2024-06-28 00:03:32,532 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 60 selfloop transitions, 21 changer transitions 0/90 dead transitions. [2024-06-28 00:03:32,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 90 transitions, 757 flow [2024-06-28 00:03:32,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:03:32,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:03:32,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-28 00:03:32,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-28 00:03:32,534 INFO L175 Difference]: Start difference. First operand has 67 places, 72 transitions, 512 flow. Second operand 4 states and 93 transitions. [2024-06-28 00:03:32,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 90 transitions, 757 flow [2024-06-28 00:03:32,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 90 transitions, 751 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-28 00:03:32,542 INFO L231 Difference]: Finished difference. Result has 69 places, 78 transitions, 630 flow [2024-06-28 00:03:32,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=630, PETRI_PLACES=69, PETRI_TRANSITIONS=78} [2024-06-28 00:03:32,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-28 00:03:32,543 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 78 transitions, 630 flow [2024-06-28 00:03:32,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:32,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:32,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:32,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:03:32,544 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:32,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:32,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1347642504, now seen corresponding path program 1 times [2024-06-28 00:03:32,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:32,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989358394] [2024-06-28 00:03:32,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:32,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:32,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:32,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989358394] [2024-06-28 00:03:32,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989358394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:32,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:32,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:03:32,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183738028] [2024-06-28 00:03:32,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:32,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:03:32,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:32,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:03:32,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:03:32,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:32,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 78 transitions, 630 flow. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:32,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:32,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:32,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:33,233 INFO L124 PetriNetUnfolderBase]: 774/1403 cut-off events. [2024-06-28 00:03:33,233 INFO L125 PetriNetUnfolderBase]: For 6474/6492 co-relation queries the response was YES. [2024-06-28 00:03:33,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5768 conditions, 1403 events. 774/1403 cut-off events. For 6474/6492 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7884 event pairs, 214 based on Foata normal form. 12/1392 useless extension candidates. Maximal degree in co-relation 5739. Up to 1051 conditions per place. [2024-06-28 00:03:33,245 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 69 selfloop transitions, 22 changer transitions 0/100 dead transitions. [2024-06-28 00:03:33,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 100 transitions, 886 flow [2024-06-28 00:03:33,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:03:33,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:03:33,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-28 00:03:33,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-28 00:03:33,247 INFO L175 Difference]: Start difference. First operand has 69 places, 78 transitions, 630 flow. Second operand 5 states and 117 transitions. [2024-06-28 00:03:33,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 100 transitions, 886 flow [2024-06-28 00:03:33,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 100 transitions, 845 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-28 00:03:33,258 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 645 flow [2024-06-28 00:03:33,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=645, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2024-06-28 00:03:33,259 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-28 00:03:33,259 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 645 flow [2024-06-28 00:03:33,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:33,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:33,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:33,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:03:33,260 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:33,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:33,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1347642318, now seen corresponding path program 3 times [2024-06-28 00:03:33,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:33,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663868647] [2024-06-28 00:03:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:33,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:33,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:33,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663868647] [2024-06-28 00:03:33,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663868647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:33,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:33,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:03:33,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312510811] [2024-06-28 00:03:33,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:33,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:03:33,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:33,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:03:33,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:03:33,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:33,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 645 flow. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:33,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:33,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:33,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:33,866 INFO L124 PetriNetUnfolderBase]: 766/1379 cut-off events. [2024-06-28 00:03:33,866 INFO L125 PetriNetUnfolderBase]: For 7089/7095 co-relation queries the response was YES. [2024-06-28 00:03:33,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5778 conditions, 1379 events. 766/1379 cut-off events. For 7089/7095 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7700 event pairs, 171 based on Foata normal form. 5/1344 useless extension candidates. Maximal degree in co-relation 5748. Up to 943 conditions per place. [2024-06-28 00:03:33,876 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 64 selfloop transitions, 25 changer transitions 0/98 dead transitions. [2024-06-28 00:03:33,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 98 transitions, 897 flow [2024-06-28 00:03:33,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:03:33,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:03:33,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-28 00:03:33,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380952380952381 [2024-06-28 00:03:33,878 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 645 flow. Second operand 5 states and 113 transitions. [2024-06-28 00:03:33,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 98 transitions, 897 flow [2024-06-28 00:03:33,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 98 transitions, 845 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 00:03:33,889 INFO L231 Difference]: Finished difference. Result has 72 places, 80 transitions, 681 flow [2024-06-28 00:03:33,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=681, PETRI_PLACES=72, PETRI_TRANSITIONS=80} [2024-06-28 00:03:33,890 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-28 00:03:33,890 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 80 transitions, 681 flow [2024-06-28 00:03:33,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:33,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:33,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:33,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:03:33,891 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:33,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:33,892 INFO L85 PathProgramCache]: Analyzing trace with hash -942073425, now seen corresponding path program 1 times [2024-06-28 00:03:33,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:33,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913840224] [2024-06-28 00:03:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:33,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:34,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:34,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:34,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913840224] [2024-06-28 00:03:34,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913840224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:34,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:34,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:34,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866958332] [2024-06-28 00:03:34,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:34,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:34,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:34,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:34,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:34,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:34,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 80 transitions, 681 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:34,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:34,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:34,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:34,473 INFO L124 PetriNetUnfolderBase]: 799/1430 cut-off events. [2024-06-28 00:03:34,473 INFO L125 PetriNetUnfolderBase]: For 7494/7500 co-relation queries the response was YES. [2024-06-28 00:03:34,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6087 conditions, 1430 events. 799/1430 cut-off events. For 7494/7500 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7962 event pairs, 155 based on Foata normal form. 5/1389 useless extension candidates. Maximal degree in co-relation 6057. Up to 971 conditions per place. [2024-06-28 00:03:34,493 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 65 selfloop transitions, 29 changer transitions 0/103 dead transitions. [2024-06-28 00:03:34,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 103 transitions, 962 flow [2024-06-28 00:03:34,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:03:34,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:03:34,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-28 00:03:34,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-28 00:03:34,495 INFO L175 Difference]: Start difference. First operand has 72 places, 80 transitions, 681 flow. Second operand 5 states and 115 transitions. [2024-06-28 00:03:34,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 103 transitions, 962 flow [2024-06-28 00:03:34,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 103 transitions, 894 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-28 00:03:34,507 INFO L231 Difference]: Finished difference. Result has 74 places, 85 transitions, 742 flow [2024-06-28 00:03:34,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=742, PETRI_PLACES=74, PETRI_TRANSITIONS=85} [2024-06-28 00:03:34,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-28 00:03:34,508 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 85 transitions, 742 flow [2024-06-28 00:03:34,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:34,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:34,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:34,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:03:34,509 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:34,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:34,509 INFO L85 PathProgramCache]: Analyzing trace with hash 528260097, now seen corresponding path program 2 times [2024-06-28 00:03:34,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:34,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87368131] [2024-06-28 00:03:34,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:34,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:34,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:34,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87368131] [2024-06-28 00:03:34,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87368131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:34,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:34,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:34,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030050375] [2024-06-28 00:03:34,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:34,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:34,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:34,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:34,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:34,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:34,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 85 transitions, 742 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:34,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:34,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:34,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:35,140 INFO L124 PetriNetUnfolderBase]: 887/1646 cut-off events. [2024-06-28 00:03:35,140 INFO L125 PetriNetUnfolderBase]: For 10224/10230 co-relation queries the response was YES. [2024-06-28 00:03:35,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6991 conditions, 1646 events. 887/1646 cut-off events. For 10224/10230 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9974 event pairs, 145 based on Foata normal form. 13/1615 useless extension candidates. Maximal degree in co-relation 6960. Up to 731 conditions per place. [2024-06-28 00:03:35,154 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 76 selfloop transitions, 31 changer transitions 0/116 dead transitions. [2024-06-28 00:03:35,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 116 transitions, 1150 flow [2024-06-28 00:03:35,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:03:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:03:35,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-28 00:03:35,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-28 00:03:35,156 INFO L175 Difference]: Start difference. First operand has 74 places, 85 transitions, 742 flow. Second operand 6 states and 136 transitions. [2024-06-28 00:03:35,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 116 transitions, 1150 flow [2024-06-28 00:03:35,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 116 transitions, 1092 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 00:03:35,169 INFO L231 Difference]: Finished difference. Result has 77 places, 87 transitions, 792 flow [2024-06-28 00:03:35,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=792, PETRI_PLACES=77, PETRI_TRANSITIONS=87} [2024-06-28 00:03:35,170 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-28 00:03:35,170 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 87 transitions, 792 flow [2024-06-28 00:03:35,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:35,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:35,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:35,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:03:35,171 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:35,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:35,171 INFO L85 PathProgramCache]: Analyzing trace with hash 528265677, now seen corresponding path program 3 times [2024-06-28 00:03:35,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:35,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322260826] [2024-06-28 00:03:35,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:35,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:35,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:35,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322260826] [2024-06-28 00:03:35,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322260826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:35,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:35,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:35,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186659086] [2024-06-28 00:03:35,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:35,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:35,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:35,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:35,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:35,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:35,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 87 transitions, 792 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:35,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:35,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:35,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:35,794 INFO L124 PetriNetUnfolderBase]: 867/1614 cut-off events. [2024-06-28 00:03:35,794 INFO L125 PetriNetUnfolderBase]: For 10963/10969 co-relation queries the response was YES. [2024-06-28 00:03:35,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6853 conditions, 1614 events. 867/1614 cut-off events. For 10963/10969 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 9757 event pairs, 107 based on Foata normal form. 13/1595 useless extension candidates. Maximal degree in co-relation 6821. Up to 725 conditions per place. [2024-06-28 00:03:35,808 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 70 selfloop transitions, 34 changer transitions 0/113 dead transitions. [2024-06-28 00:03:35,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 113 transitions, 1108 flow [2024-06-28 00:03:35,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:03:35,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:03:35,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-28 00:03:35,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-28 00:03:35,809 INFO L175 Difference]: Start difference. First operand has 77 places, 87 transitions, 792 flow. Second operand 6 states and 133 transitions. [2024-06-28 00:03:35,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 113 transitions, 1108 flow [2024-06-28 00:03:35,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 113 transitions, 1051 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-28 00:03:35,826 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 811 flow [2024-06-28 00:03:35,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=811, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2024-06-28 00:03:35,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-28 00:03:35,827 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 811 flow [2024-06-28 00:03:35,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:35,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:35,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:35,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:03:35,828 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:35,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:35,828 INFO L85 PathProgramCache]: Analyzing trace with hash 287950202, now seen corresponding path program 1 times [2024-06-28 00:03:35,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:35,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387602282] [2024-06-28 00:03:35,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:35,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:35,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:35,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:35,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387602282] [2024-06-28 00:03:35,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387602282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:35,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:35,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:03:35,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428548501] [2024-06-28 00:03:35,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:35,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:03:35,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:35,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:03:35,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:03:35,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-28 00:03:35,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 811 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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) [2024-06-28 00:03:35,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:35,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-28 00:03:35,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:36,166 INFO L124 PetriNetUnfolderBase]: 708/1411 cut-off events. [2024-06-28 00:03:36,167 INFO L125 PetriNetUnfolderBase]: For 9638/9645 co-relation queries the response was YES. [2024-06-28 00:03:36,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5997 conditions, 1411 events. 708/1411 cut-off events. For 9638/9645 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9044 event pairs, 224 based on Foata normal form. 8/1386 useless extension candidates. Maximal degree in co-relation 5964. Up to 1057 conditions per place. [2024-06-28 00:03:36,176 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 66 selfloop transitions, 9 changer transitions 0/101 dead transitions. [2024-06-28 00:03:36,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 101 transitions, 1039 flow [2024-06-28 00:03:36,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:03:36,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:03:36,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-28 00:03:36,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-28 00:03:36,178 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 811 flow. Second operand 4 states and 96 transitions. [2024-06-28 00:03:36,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 101 transitions, 1039 flow [2024-06-28 00:03:36,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 101 transitions, 981 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-28 00:03:36,193 INFO L231 Difference]: Finished difference. Result has 82 places, 90 transitions, 814 flow [2024-06-28 00:03:36,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=814, PETRI_PLACES=82, PETRI_TRANSITIONS=90} [2024-06-28 00:03:36,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-28 00:03:36,193 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 90 transitions, 814 flow [2024-06-28 00:03:36,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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) [2024-06-28 00:03:36,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:36,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:36,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:03:36,194 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:36,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:36,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1617239087, now seen corresponding path program 1 times [2024-06-28 00:03:36,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:36,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851358591] [2024-06-28 00:03:36,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:36,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:36,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:36,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:36,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851358591] [2024-06-28 00:03:36,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851358591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:36,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:36,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:36,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501034622] [2024-06-28 00:03:36,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:36,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:36,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:36,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:36,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:36,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:36,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 90 transitions, 814 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:36,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:36,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:36,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:36,908 INFO L124 PetriNetUnfolderBase]: 1076/2035 cut-off events. [2024-06-28 00:03:36,908 INFO L125 PetriNetUnfolderBase]: For 16116/16122 co-relation queries the response was YES. [2024-06-28 00:03:36,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8220 conditions, 2035 events. 1076/2035 cut-off events. For 16116/16122 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13097 event pairs, 280 based on Foata normal form. 33/2023 useless extension candidates. Maximal degree in co-relation 8185. Up to 489 conditions per place. [2024-06-28 00:03:36,923 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 88 selfloop transitions, 38 changer transitions 0/135 dead transitions. [2024-06-28 00:03:36,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 135 transitions, 1302 flow [2024-06-28 00:03:36,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:03:36,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:03:36,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-28 00:03:36,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-28 00:03:36,925 INFO L175 Difference]: Start difference. First operand has 82 places, 90 transitions, 814 flow. Second operand 6 states and 145 transitions. [2024-06-28 00:03:36,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 135 transitions, 1302 flow [2024-06-28 00:03:36,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 135 transitions, 1277 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-28 00:03:36,946 INFO L231 Difference]: Finished difference. Result has 88 places, 98 transitions, 980 flow [2024-06-28 00:03:36,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=980, PETRI_PLACES=88, PETRI_TRANSITIONS=98} [2024-06-28 00:03:36,948 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-28 00:03:36,948 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 98 transitions, 980 flow [2024-06-28 00:03:36,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:36,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:36,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:36,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:03:36,949 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:36,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:36,949 INFO L85 PathProgramCache]: Analyzing trace with hash 382679974, now seen corresponding path program 1 times [2024-06-28 00:03:36,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:36,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440632863] [2024-06-28 00:03:36,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:36,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:37,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:37,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440632863] [2024-06-28 00:03:37,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440632863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:37,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:37,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:03:37,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109896714] [2024-06-28 00:03:37,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:37,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:03:37,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:37,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:03:37,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:03:37,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-28 00:03:37,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 98 transitions, 980 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:37,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:37,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-28 00:03:37,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:37,508 INFO L124 PetriNetUnfolderBase]: 907/1840 cut-off events. [2024-06-28 00:03:37,508 INFO L125 PetriNetUnfolderBase]: For 15007/15017 co-relation queries the response was YES. [2024-06-28 00:03:37,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8027 conditions, 1840 events. 907/1840 cut-off events. For 15007/15017 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12578 event pairs, 347 based on Foata normal form. 8/1802 useless extension candidates. Maximal degree in co-relation 7988. Up to 1374 conditions per place. [2024-06-28 00:03:37,522 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 68 selfloop transitions, 9 changer transitions 0/108 dead transitions. [2024-06-28 00:03:37,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 108 transitions, 1160 flow [2024-06-28 00:03:37,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:03:37,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:03:37,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-28 00:03:37,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-28 00:03:37,524 INFO L175 Difference]: Start difference. First operand has 88 places, 98 transitions, 980 flow. Second operand 4 states and 94 transitions. [2024-06-28 00:03:37,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 108 transitions, 1160 flow [2024-06-28 00:03:37,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 108 transitions, 1114 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-06-28 00:03:37,547 INFO L231 Difference]: Finished difference. Result has 91 places, 98 transitions, 961 flow [2024-06-28 00:03:37,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=961, PETRI_PLACES=91, PETRI_TRANSITIONS=98} [2024-06-28 00:03:37,547 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-28 00:03:37,548 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 98 transitions, 961 flow [2024-06-28 00:03:37,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:37,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:37,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:37,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:03:37,549 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:37,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:37,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1067832009, now seen corresponding path program 1 times [2024-06-28 00:03:37,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:37,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128830798] [2024-06-28 00:03:37,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:37,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:37,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:37,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128830798] [2024-06-28 00:03:37,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128830798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:37,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:37,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:03:37,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092582637] [2024-06-28 00:03:37,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:37,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:03:37,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:37,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:03:37,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:03:37,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-28 00:03:37,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 98 transitions, 961 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:37,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:37,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-28 00:03:37,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:38,075 INFO L124 PetriNetUnfolderBase]: 903/1826 cut-off events. [2024-06-28 00:03:38,075 INFO L125 PetriNetUnfolderBase]: For 15708/15718 co-relation queries the response was YES. [2024-06-28 00:03:38,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7792 conditions, 1826 events. 903/1826 cut-off events. For 15708/15718 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12325 event pairs, 244 based on Foata normal form. 9/1790 useless extension candidates. Maximal degree in co-relation 7751. Up to 1210 conditions per place. [2024-06-28 00:03:38,089 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 62 selfloop transitions, 23 changer transitions 0/116 dead transitions. [2024-06-28 00:03:38,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 116 transitions, 1209 flow [2024-06-28 00:03:38,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:03:38,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:03:38,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-28 00:03:38,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-28 00:03:38,090 INFO L175 Difference]: Start difference. First operand has 91 places, 98 transitions, 961 flow. Second operand 5 states and 119 transitions. [2024-06-28 00:03:38,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 116 transitions, 1209 flow [2024-06-28 00:03:38,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 116 transitions, 1185 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 00:03:38,113 INFO L231 Difference]: Finished difference. Result has 93 places, 98 transitions, 997 flow [2024-06-28 00:03:38,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=997, PETRI_PLACES=93, PETRI_TRANSITIONS=98} [2024-06-28 00:03:38,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-28 00:03:38,114 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 98 transitions, 997 flow [2024-06-28 00:03:38,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:38,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:38,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:38,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:03:38,114 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:38,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:38,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1842269497, now seen corresponding path program 2 times [2024-06-28 00:03:38,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:38,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523556638] [2024-06-28 00:03:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:38,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:38,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:38,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523556638] [2024-06-28 00:03:38,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523556638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:38,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:38,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:03:38,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841197907] [2024-06-28 00:03:38,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:38,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:03:38,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:38,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:03:38,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:03:38,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-28 00:03:38,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 98 transitions, 997 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:38,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:38,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-28 00:03:38,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:38,739 INFO L124 PetriNetUnfolderBase]: 896/1793 cut-off events. [2024-06-28 00:03:38,740 INFO L125 PetriNetUnfolderBase]: For 17418/17431 co-relation queries the response was YES. [2024-06-28 00:03:38,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7878 conditions, 1793 events. 896/1793 cut-off events. For 17418/17431 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12102 event pairs, 265 based on Foata normal form. 7/1733 useless extension candidates. Maximal degree in co-relation 7836. Up to 1168 conditions per place. [2024-06-28 00:03:38,756 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 57 selfloop transitions, 24 changer transitions 0/112 dead transitions. [2024-06-28 00:03:38,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 112 transitions, 1238 flow [2024-06-28 00:03:38,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:03:38,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:03:38,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-28 00:03:38,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-28 00:03:38,757 INFO L175 Difference]: Start difference. First operand has 93 places, 98 transitions, 997 flow. Second operand 5 states and 110 transitions. [2024-06-28 00:03:38,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 112 transitions, 1238 flow [2024-06-28 00:03:38,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 112 transitions, 1208 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-28 00:03:38,783 INFO L231 Difference]: Finished difference. Result has 96 places, 100 transitions, 1041 flow [2024-06-28 00:03:38,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1041, PETRI_PLACES=96, PETRI_TRANSITIONS=100} [2024-06-28 00:03:38,783 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-28 00:03:38,784 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 100 transitions, 1041 flow [2024-06-28 00:03:38,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:38,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:38,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:38,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:03:38,784 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:38,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:38,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1835609209, now seen corresponding path program 1 times [2024-06-28 00:03:38,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:38,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623740174] [2024-06-28 00:03:38,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:38,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:38,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:38,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623740174] [2024-06-28 00:03:38,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623740174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:38,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:38,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:03:38,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997677536] [2024-06-28 00:03:38,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:38,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:03:38,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:38,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:03:38,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:03:38,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:38,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 100 transitions, 1041 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 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) [2024-06-28 00:03:38,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:38,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:38,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:39,172 INFO L124 PetriNetUnfolderBase]: 1054/2005 cut-off events. [2024-06-28 00:03:39,172 INFO L125 PetriNetUnfolderBase]: For 18720/18720 co-relation queries the response was YES. [2024-06-28 00:03:39,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9005 conditions, 2005 events. 1054/2005 cut-off events. For 18720/18720 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12920 event pairs, 353 based on Foata normal form. 1/1966 useless extension candidates. Maximal degree in co-relation 8962. Up to 1650 conditions per place. [2024-06-28 00:03:39,185 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 99 selfloop transitions, 15 changer transitions 0/123 dead transitions. [2024-06-28 00:03:39,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 123 transitions, 1419 flow [2024-06-28 00:03:39,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:03:39,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:03:39,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-28 00:03:39,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-28 00:03:39,187 INFO L175 Difference]: Start difference. First operand has 96 places, 100 transitions, 1041 flow. Second operand 5 states and 112 transitions. [2024-06-28 00:03:39,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 123 transitions, 1419 flow [2024-06-28 00:03:39,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 123 transitions, 1383 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-28 00:03:39,209 INFO L231 Difference]: Finished difference. Result has 99 places, 105 transitions, 1111 flow [2024-06-28 00:03:39,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1111, PETRI_PLACES=99, PETRI_TRANSITIONS=105} [2024-06-28 00:03:39,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-28 00:03:39,210 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 105 transitions, 1111 flow [2024-06-28 00:03:39,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 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) [2024-06-28 00:03:39,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:39,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:39,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:03:39,210 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:39,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:39,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1021830117, now seen corresponding path program 2 times [2024-06-28 00:03:39,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:39,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143249123] [2024-06-28 00:03:39,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:39,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:39,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:39,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143249123] [2024-06-28 00:03:39,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143249123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:39,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:39,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:03:39,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274478399] [2024-06-28 00:03:39,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:39,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:03:39,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:39,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:03:39,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:03:39,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:39,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 105 transitions, 1111 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 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) [2024-06-28 00:03:39,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:39,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:39,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:39,659 INFO L124 PetriNetUnfolderBase]: 1051/2002 cut-off events. [2024-06-28 00:03:39,660 INFO L125 PetriNetUnfolderBase]: For 20541/20556 co-relation queries the response was YES. [2024-06-28 00:03:39,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9086 conditions, 2002 events. 1051/2002 cut-off events. For 20541/20556 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12916 event pairs, 370 based on Foata normal form. 11/1970 useless extension candidates. Maximal degree in co-relation 9041. Up to 1648 conditions per place. [2024-06-28 00:03:39,676 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 93 selfloop transitions, 18 changer transitions 0/120 dead transitions. [2024-06-28 00:03:39,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 120 transitions, 1441 flow [2024-06-28 00:03:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:03:39,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:03:39,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-06-28 00:03:39,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5095238095238095 [2024-06-28 00:03:39,677 INFO L175 Difference]: Start difference. First operand has 99 places, 105 transitions, 1111 flow. Second operand 5 states and 107 transitions. [2024-06-28 00:03:39,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 120 transitions, 1441 flow [2024-06-28 00:03:39,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 120 transitions, 1408 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-28 00:03:39,701 INFO L231 Difference]: Finished difference. Result has 103 places, 108 transitions, 1164 flow [2024-06-28 00:03:39,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1164, PETRI_PLACES=103, PETRI_TRANSITIONS=108} [2024-06-28 00:03:39,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-28 00:03:39,702 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 108 transitions, 1164 flow [2024-06-28 00:03:39,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 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) [2024-06-28 00:03:39,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:39,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:39,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:03:39,703 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:39,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:39,703 INFO L85 PathProgramCache]: Analyzing trace with hash 891996073, now seen corresponding path program 1 times [2024-06-28 00:03:39,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:39,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489951593] [2024-06-28 00:03:39,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:39,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:39,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:39,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489951593] [2024-06-28 00:03:39,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489951593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:39,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:39,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:03:39,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864345989] [2024-06-28 00:03:39,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:39,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:03:39,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:39,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:03:39,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:03:39,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-28 00:03:39,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 108 transitions, 1164 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:39,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:39,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-28 00:03:39,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:40,340 INFO L124 PetriNetUnfolderBase]: 895/1794 cut-off events. [2024-06-28 00:03:40,340 INFO L125 PetriNetUnfolderBase]: For 20088/20103 co-relation queries the response was YES. [2024-06-28 00:03:40,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8152 conditions, 1794 events. 895/1794 cut-off events. For 20088/20103 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12070 event pairs, 245 based on Foata normal form. 11/1742 useless extension candidates. Maximal degree in co-relation 8105. Up to 1203 conditions per place. [2024-06-28 00:03:40,353 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 63 selfloop transitions, 22 changer transitions 0/119 dead transitions. [2024-06-28 00:03:40,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 119 transitions, 1360 flow [2024-06-28 00:03:40,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:03:40,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:03:40,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-28 00:03:40,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-28 00:03:40,355 INFO L175 Difference]: Start difference. First operand has 103 places, 108 transitions, 1164 flow. Second operand 5 states and 110 transitions. [2024-06-28 00:03:40,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 119 transitions, 1360 flow [2024-06-28 00:03:40,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 119 transitions, 1288 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-28 00:03:40,380 INFO L231 Difference]: Finished difference. Result has 106 places, 108 transitions, 1144 flow [2024-06-28 00:03:40,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1144, PETRI_PLACES=106, PETRI_TRANSITIONS=108} [2024-06-28 00:03:40,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-28 00:03:40,381 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 108 transitions, 1144 flow [2024-06-28 00:03:40,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:40,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:40,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:40,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:03:40,382 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:40,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:40,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1275781033, now seen corresponding path program 2 times [2024-06-28 00:03:40,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:40,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558646455] [2024-06-28 00:03:40,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:40,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:40,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:40,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558646455] [2024-06-28 00:03:40,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558646455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:40,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:40,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:03:40,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828772555] [2024-06-28 00:03:40,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:40,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:03:40,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:40,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:03:40,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:03:40,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-28 00:03:40,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 108 transitions, 1144 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:40,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:40,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-28 00:03:40,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:41,234 INFO L124 PetriNetUnfolderBase]: 885/1788 cut-off events. [2024-06-28 00:03:41,234 INFO L125 PetriNetUnfolderBase]: For 20315/20326 co-relation queries the response was YES. [2024-06-28 00:03:41,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8093 conditions, 1788 events. 885/1788 cut-off events. For 20315/20326 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12038 event pairs, 237 based on Foata normal form. 9/1741 useless extension candidates. Maximal degree in co-relation 8044. Up to 1163 conditions per place. [2024-06-28 00:03:41,250 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 65 selfloop transitions, 21 changer transitions 0/120 dead transitions. [2024-06-28 00:03:41,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 120 transitions, 1344 flow [2024-06-28 00:03:41,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:03:41,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:03:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-28 00:03:41,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-28 00:03:41,251 INFO L175 Difference]: Start difference. First operand has 106 places, 108 transitions, 1144 flow. Second operand 5 states and 110 transitions. [2024-06-28 00:03:41,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 120 transitions, 1344 flow [2024-06-28 00:03:41,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 120 transitions, 1300 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 00:03:41,279 INFO L231 Difference]: Finished difference. Result has 108 places, 108 transitions, 1148 flow [2024-06-28 00:03:41,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1148, PETRI_PLACES=108, PETRI_TRANSITIONS=108} [2024-06-28 00:03:41,280 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-28 00:03:41,280 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 108 transitions, 1148 flow [2024-06-28 00:03:41,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:41,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:41,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:41,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:03:41,281 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:41,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:41,281 INFO L85 PathProgramCache]: Analyzing trace with hash -405133004, now seen corresponding path program 1 times [2024-06-28 00:03:41,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:41,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159688075] [2024-06-28 00:03:41,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:41,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:41,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:41,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159688075] [2024-06-28 00:03:41,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159688075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:41,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:41,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:03:41,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411376557] [2024-06-28 00:03:41,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:41,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:03:41,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:41,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:03:41,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:03:41,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:41,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 108 transitions, 1148 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:41,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:41,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:41,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:41,752 INFO L124 PetriNetUnfolderBase]: 1030/1964 cut-off events. [2024-06-28 00:03:41,752 INFO L125 PetriNetUnfolderBase]: For 21975/21975 co-relation queries the response was YES. [2024-06-28 00:03:41,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9076 conditions, 1964 events. 1030/1964 cut-off events. For 21975/21975 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12557 event pairs, 340 based on Foata normal form. 1/1927 useless extension candidates. Maximal degree in co-relation 9026. Up to 1579 conditions per place. [2024-06-28 00:03:41,799 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 106 selfloop transitions, 23 changer transitions 0/138 dead transitions. [2024-06-28 00:03:41,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 138 transitions, 1628 flow [2024-06-28 00:03:41,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:03:41,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:03:41,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-28 00:03:41,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-28 00:03:41,800 INFO L175 Difference]: Start difference. First operand has 108 places, 108 transitions, 1148 flow. Second operand 6 states and 135 transitions. [2024-06-28 00:03:41,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 138 transitions, 1628 flow [2024-06-28 00:03:41,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 138 transitions, 1584 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 00:03:41,830 INFO L231 Difference]: Finished difference. Result has 111 places, 113 transitions, 1226 flow [2024-06-28 00:03:41,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1226, PETRI_PLACES=111, PETRI_TRANSITIONS=113} [2024-06-28 00:03:41,831 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-28 00:03:41,831 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 113 transitions, 1226 flow [2024-06-28 00:03:41,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:41,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:41,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:41,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:03:41,831 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:41,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:41,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1069312105, now seen corresponding path program 1 times [2024-06-28 00:03:41,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:41,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924399307] [2024-06-28 00:03:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:41,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:42,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:42,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924399307] [2024-06-28 00:03:42,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924399307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:42,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:42,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:03:42,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724327167] [2024-06-28 00:03:42,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:42,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:03:42,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:42,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:03:42,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:03:42,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:42,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 113 transitions, 1226 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:42,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:42,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:42,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:42,414 INFO L124 PetriNetUnfolderBase]: 1038/1986 cut-off events. [2024-06-28 00:03:42,415 INFO L125 PetriNetUnfolderBase]: For 23394/23394 co-relation queries the response was YES. [2024-06-28 00:03:42,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9306 conditions, 1986 events. 1038/1986 cut-off events. For 23394/23394 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12775 event pairs, 351 based on Foata normal form. 2/1950 useless extension candidates. Maximal degree in co-relation 9255. Up to 1625 conditions per place. [2024-06-28 00:03:42,429 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 106 selfloop transitions, 19 changer transitions 0/134 dead transitions. [2024-06-28 00:03:42,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 134 transitions, 1604 flow [2024-06-28 00:03:42,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:03:42,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:03:42,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-28 00:03:42,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-06-28 00:03:42,431 INFO L175 Difference]: Start difference. First operand has 111 places, 113 transitions, 1226 flow. Second operand 6 states and 128 transitions. [2024-06-28 00:03:42,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 134 transitions, 1604 flow [2024-06-28 00:03:42,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 134 transitions, 1554 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-28 00:03:42,463 INFO L231 Difference]: Finished difference. Result has 115 places, 115 transitions, 1255 flow [2024-06-28 00:03:42,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1255, PETRI_PLACES=115, PETRI_TRANSITIONS=115} [2024-06-28 00:03:42,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-28 00:03:42,463 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 115 transitions, 1255 flow [2024-06-28 00:03:42,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:42,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:42,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:42,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:03:42,464 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:42,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:42,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1069311888, now seen corresponding path program 2 times [2024-06-28 00:03:42,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:42,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030853585] [2024-06-28 00:03:42,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:42,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:42,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:42,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030853585] [2024-06-28 00:03:42,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030853585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:42,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:42,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:03:42,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244110193] [2024-06-28 00:03:42,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:42,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:03:42,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:42,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:03:42,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:03:42,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:42,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 115 transitions, 1255 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:42,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:42,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:42,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:42,974 INFO L124 PetriNetUnfolderBase]: 1043/1987 cut-off events. [2024-06-28 00:03:42,974 INFO L125 PetriNetUnfolderBase]: For 24707/24707 co-relation queries the response was YES. [2024-06-28 00:03:42,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9454 conditions, 1987 events. 1043/1987 cut-off events. For 24707/24707 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12760 event pairs, 348 based on Foata normal form. 1/1950 useless extension candidates. Maximal degree in co-relation 9401. Up to 1587 conditions per place. [2024-06-28 00:03:42,990 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 102 selfloop transitions, 26 changer transitions 0/137 dead transitions. [2024-06-28 00:03:42,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 137 transitions, 1659 flow [2024-06-28 00:03:42,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:03:42,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:03:42,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-28 00:03:42,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-28 00:03:42,992 INFO L175 Difference]: Start difference. First operand has 115 places, 115 transitions, 1255 flow. Second operand 6 states and 130 transitions. [2024-06-28 00:03:42,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 137 transitions, 1659 flow [2024-06-28 00:03:43,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 137 transitions, 1603 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 00:03:43,031 INFO L231 Difference]: Finished difference. Result has 117 places, 118 transitions, 1301 flow [2024-06-28 00:03:43,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1301, PETRI_PLACES=117, PETRI_TRANSITIONS=118} [2024-06-28 00:03:43,032 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-28 00:03:43,032 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 118 transitions, 1301 flow [2024-06-28 00:03:43,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:43,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:43,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:43,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:03:43,034 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:43,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:43,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1573530691, now seen corresponding path program 2 times [2024-06-28 00:03:43,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:43,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352782760] [2024-06-28 00:03:43,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:43,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:43,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:43,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352782760] [2024-06-28 00:03:43,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352782760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:43,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:43,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:03:43,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218949855] [2024-06-28 00:03:43,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:43,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:03:43,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:43,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:03:43,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:03:43,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:43,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 118 transitions, 1301 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:43,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:43,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:43,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:43,619 INFO L124 PetriNetUnfolderBase]: 1051/2002 cut-off events. [2024-06-28 00:03:43,619 INFO L125 PetriNetUnfolderBase]: For 26698/26713 co-relation queries the response was YES. [2024-06-28 00:03:43,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9682 conditions, 2002 events. 1051/2002 cut-off events. For 26698/26713 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12885 event pairs, 353 based on Foata normal form. 12/1973 useless extension candidates. Maximal degree in co-relation 9628. Up to 1640 conditions per place. [2024-06-28 00:03:43,636 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 103 selfloop transitions, 22 changer transitions 0/134 dead transitions. [2024-06-28 00:03:43,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 134 transitions, 1669 flow [2024-06-28 00:03:43,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:03:43,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:03:43,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-28 00:03:43,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-28 00:03:43,637 INFO L175 Difference]: Start difference. First operand has 117 places, 118 transitions, 1301 flow. Second operand 6 states and 123 transitions. [2024-06-28 00:03:43,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 134 transitions, 1669 flow [2024-06-28 00:03:43,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 134 transitions, 1608 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-28 00:03:43,679 INFO L231 Difference]: Finished difference. Result has 120 places, 120 transitions, 1325 flow [2024-06-28 00:03:43,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1325, PETRI_PLACES=120, PETRI_TRANSITIONS=120} [2024-06-28 00:03:43,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-28 00:03:43,680 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 120 transitions, 1325 flow [2024-06-28 00:03:43,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:43,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:43,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:43,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:03:43,680 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:43,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:43,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1270018868, now seen corresponding path program 3 times [2024-06-28 00:03:43,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:43,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507161358] [2024-06-28 00:03:43,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:43,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:43,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:43,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507161358] [2024-06-28 00:03:43,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507161358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:43,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:43,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:03:43,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53283064] [2024-06-28 00:03:43,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:43,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:03:43,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:43,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:03:43,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:03:43,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:43,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 120 transitions, 1325 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:43,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:43,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:43,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:44,157 INFO L124 PetriNetUnfolderBase]: 1045/1992 cut-off events. [2024-06-28 00:03:44,158 INFO L125 PetriNetUnfolderBase]: For 27947/27959 co-relation queries the response was YES. [2024-06-28 00:03:44,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9657 conditions, 1992 events. 1045/1992 cut-off events. For 27947/27959 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12845 event pairs, 364 based on Foata normal form. 9/1957 useless extension candidates. Maximal degree in co-relation 9602. Up to 1584 conditions per place. [2024-06-28 00:03:44,191 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 96 selfloop transitions, 31 changer transitions 0/136 dead transitions. [2024-06-28 00:03:44,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 136 transitions, 1707 flow [2024-06-28 00:03:44,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:03:44,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:03:44,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-28 00:03:44,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49603174603174605 [2024-06-28 00:03:44,193 INFO L175 Difference]: Start difference. First operand has 120 places, 120 transitions, 1325 flow. Second operand 6 states and 125 transitions. [2024-06-28 00:03:44,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 136 transitions, 1707 flow [2024-06-28 00:03:44,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 136 transitions, 1645 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 00:03:44,240 INFO L231 Difference]: Finished difference. Result has 122 places, 123 transitions, 1379 flow [2024-06-28 00:03:44,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1379, PETRI_PLACES=122, PETRI_TRANSITIONS=123} [2024-06-28 00:03:44,241 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-28 00:03:44,241 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 123 transitions, 1379 flow [2024-06-28 00:03:44,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:44,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:44,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:44,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:03:44,242 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:44,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:44,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1565220211, now seen corresponding path program 3 times [2024-06-28 00:03:44,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:44,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691877374] [2024-06-28 00:03:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:44,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:44,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:44,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691877374] [2024-06-28 00:03:44,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691877374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:44,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:44,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:03:44,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406740289] [2024-06-28 00:03:44,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:44,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:03:44,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:44,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:03:44,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:03:44,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:44,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 123 transitions, 1379 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:44,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:44,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:44,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:44,961 INFO L124 PetriNetUnfolderBase]: 1040/1986 cut-off events. [2024-06-28 00:03:44,962 INFO L125 PetriNetUnfolderBase]: For 28198/28198 co-relation queries the response was YES. [2024-06-28 00:03:44,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9689 conditions, 1986 events. 1040/1986 cut-off events. For 28198/28198 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12802 event pairs, 349 based on Foata normal form. 2/1949 useless extension candidates. Maximal degree in co-relation 9633. Up to 1627 conditions per place. [2024-06-28 00:03:44,980 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 107 selfloop transitions, 24 changer transitions 0/140 dead transitions. [2024-06-28 00:03:44,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 140 transitions, 1685 flow [2024-06-28 00:03:44,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:03:44,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:03:44,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-28 00:03:44,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49603174603174605 [2024-06-28 00:03:44,982 INFO L175 Difference]: Start difference. First operand has 122 places, 123 transitions, 1379 flow. Second operand 6 states and 125 transitions. [2024-06-28 00:03:44,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 140 transitions, 1685 flow [2024-06-28 00:03:45,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 140 transitions, 1607 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-28 00:03:45,023 INFO L231 Difference]: Finished difference. Result has 125 places, 123 transitions, 1364 flow [2024-06-28 00:03:45,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1301, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1364, PETRI_PLACES=125, PETRI_TRANSITIONS=123} [2024-06-28 00:03:45,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-28 00:03:45,024 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 123 transitions, 1364 flow [2024-06-28 00:03:45,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:45,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:45,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:45,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:03:45,025 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:45,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:45,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1743712608, now seen corresponding path program 1 times [2024-06-28 00:03:45,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:45,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344138696] [2024-06-28 00:03:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:45,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:45,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:45,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344138696] [2024-06-28 00:03:45,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344138696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:45,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:45,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:03:45,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75833621] [2024-06-28 00:03:45,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:45,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:03:45,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:45,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:03:45,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:03:45,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:45,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 123 transitions, 1364 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:45,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:45,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:45,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:45,589 INFO L124 PetriNetUnfolderBase]: 1066/2026 cut-off events. [2024-06-28 00:03:45,589 INFO L125 PetriNetUnfolderBase]: For 30828/30834 co-relation queries the response was YES. [2024-06-28 00:03:45,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10055 conditions, 2026 events. 1066/2026 cut-off events. For 30828/30834 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13013 event pairs, 315 based on Foata normal form. 7/1998 useless extension candidates. Maximal degree in co-relation 9997. Up to 1574 conditions per place. [2024-06-28 00:03:45,606 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 115 selfloop transitions, 41 changer transitions 0/165 dead transitions. [2024-06-28 00:03:45,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 165 transitions, 1954 flow [2024-06-28 00:03:45,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:03:45,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:03:45,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-28 00:03:45,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408163265306123 [2024-06-28 00:03:45,607 INFO L175 Difference]: Start difference. First operand has 125 places, 123 transitions, 1364 flow. Second operand 7 states and 159 transitions. [2024-06-28 00:03:45,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 165 transitions, 1954 flow [2024-06-28 00:03:45,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 165 transitions, 1903 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 00:03:45,663 INFO L231 Difference]: Finished difference. Result has 127 places, 131 transitions, 1536 flow [2024-06-28 00:03:45,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1536, PETRI_PLACES=127, PETRI_TRANSITIONS=131} [2024-06-28 00:03:45,666 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-28 00:03:45,667 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 131 transitions, 1536 flow [2024-06-28 00:03:45,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:45,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:45,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:45,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:03:45,667 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:45,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:45,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1882067064, now seen corresponding path program 2 times [2024-06-28 00:03:45,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:45,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20940175] [2024-06-28 00:03:45,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:45,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:45,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:45,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20940175] [2024-06-28 00:03:45,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20940175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:45,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:45,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:03:45,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841828223] [2024-06-28 00:03:45,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:45,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:03:45,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:45,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:03:45,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:03:45,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:45,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 131 transitions, 1536 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:45,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:45,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:45,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:46,243 INFO L124 PetriNetUnfolderBase]: 1063/2027 cut-off events. [2024-06-28 00:03:46,244 INFO L125 PetriNetUnfolderBase]: For 29878/29893 co-relation queries the response was YES. [2024-06-28 00:03:46,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10205 conditions, 2027 events. 1063/2027 cut-off events. For 29878/29893 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13066 event pairs, 331 based on Foata normal form. 13/2004 useless extension candidates. Maximal degree in co-relation 10147. Up to 1572 conditions per place. [2024-06-28 00:03:46,259 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 104 selfloop transitions, 44 changer transitions 0/157 dead transitions. [2024-06-28 00:03:46,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 157 transitions, 2010 flow [2024-06-28 00:03:46,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:03:46,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:03:46,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-28 00:03:46,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-28 00:03:46,261 INFO L175 Difference]: Start difference. First operand has 127 places, 131 transitions, 1536 flow. Second operand 6 states and 135 transitions. [2024-06-28 00:03:46,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 157 transitions, 2010 flow [2024-06-28 00:03:46,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 157 transitions, 1970 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-06-28 00:03:46,302 INFO L231 Difference]: Finished difference. Result has 133 places, 135 transitions, 1680 flow [2024-06-28 00:03:46,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1680, PETRI_PLACES=133, PETRI_TRANSITIONS=135} [2024-06-28 00:03:46,302 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-28 00:03:46,302 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 135 transitions, 1680 flow [2024-06-28 00:03:46,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:46,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:46,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:46,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 00:03:46,303 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:46,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:46,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1325505370, now seen corresponding path program 3 times [2024-06-28 00:03:46,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:46,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114257370] [2024-06-28 00:03:46,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:46,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:46,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:46,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114257370] [2024-06-28 00:03:46,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114257370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:46,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:46,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:03:46,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714859629] [2024-06-28 00:03:46,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:46,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:03:46,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:46,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:03:46,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:03:46,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:46,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 135 transitions, 1680 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:46,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:46,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:46,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:47,004 INFO L124 PetriNetUnfolderBase]: 1068/2035 cut-off events. [2024-06-28 00:03:47,004 INFO L125 PetriNetUnfolderBase]: For 30222/30240 co-relation queries the response was YES. [2024-06-28 00:03:47,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10429 conditions, 2035 events. 1068/2035 cut-off events. For 30222/30240 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13071 event pairs, 331 based on Foata normal form. 11/2007 useless extension candidates. Maximal degree in co-relation 10368. Up to 1529 conditions per place. [2024-06-28 00:03:47,020 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 112 selfloop transitions, 42 changer transitions 0/163 dead transitions. [2024-06-28 00:03:47,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 163 transitions, 2208 flow [2024-06-28 00:03:47,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:03:47,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:03:47,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-28 00:03:47,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198412698412699 [2024-06-28 00:03:47,021 INFO L175 Difference]: Start difference. First operand has 133 places, 135 transitions, 1680 flow. Second operand 6 states and 131 transitions. [2024-06-28 00:03:47,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 163 transitions, 2208 flow [2024-06-28 00:03:47,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 163 transitions, 2136 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-28 00:03:47,070 INFO L231 Difference]: Finished difference. Result has 138 places, 141 transitions, 1810 flow [2024-06-28 00:03:47,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1810, PETRI_PLACES=138, PETRI_TRANSITIONS=141} [2024-06-28 00:03:47,071 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-28 00:03:47,071 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 141 transitions, 1810 flow [2024-06-28 00:03:47,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:47,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:47,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:47,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 00:03:47,071 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:47,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:47,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1563086746, now seen corresponding path program 4 times [2024-06-28 00:03:47,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:47,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586583766] [2024-06-28 00:03:47,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:47,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:47,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:47,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:47,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586583766] [2024-06-28 00:03:47,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586583766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:47,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:47,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:03:47,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490900325] [2024-06-28 00:03:47,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:47,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:03:47,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:47,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:03:47,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:03:47,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:47,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 141 transitions, 1810 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:47,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:47,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:47,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:47,767 INFO L124 PetriNetUnfolderBase]: 1073/2034 cut-off events. [2024-06-28 00:03:47,767 INFO L125 PetriNetUnfolderBase]: For 32696/32763 co-relation queries the response was YES. [2024-06-28 00:03:47,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10611 conditions, 2034 events. 1073/2034 cut-off events. For 32696/32763 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13064 event pairs, 359 based on Foata normal form. 30/2013 useless extension candidates. Maximal degree in co-relation 10548. Up to 1533 conditions per place. [2024-06-28 00:03:47,783 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 105 selfloop transitions, 51 changer transitions 0/165 dead transitions. [2024-06-28 00:03:47,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 165 transitions, 2394 flow [2024-06-28 00:03:47,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:03:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:03:47,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-28 00:03:47,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-28 00:03:47,785 INFO L175 Difference]: Start difference. First operand has 138 places, 141 transitions, 1810 flow. Second operand 6 states and 127 transitions. [2024-06-28 00:03:47,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 165 transitions, 2394 flow [2024-06-28 00:03:47,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 165 transitions, 2345 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-06-28 00:03:47,830 INFO L231 Difference]: Finished difference. Result has 144 places, 149 transitions, 2007 flow [2024-06-28 00:03:47,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2007, PETRI_PLACES=144, PETRI_TRANSITIONS=149} [2024-06-28 00:03:47,831 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-28 00:03:47,831 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 149 transitions, 2007 flow [2024-06-28 00:03:47,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:47,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:47,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:47,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 00:03:47,831 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:47,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:47,831 INFO L85 PathProgramCache]: Analyzing trace with hash 496957176, now seen corresponding path program 5 times [2024-06-28 00:03:47,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:47,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185063242] [2024-06-28 00:03:47,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:47,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:48,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:48,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185063242] [2024-06-28 00:03:48,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185063242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:48,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:48,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:03:48,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105868368] [2024-06-28 00:03:48,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:48,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:03:48,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:48,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:03:48,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:03:48,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:48,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 149 transitions, 2007 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:48,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:48,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:48,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:48,455 INFO L124 PetriNetUnfolderBase]: 1070/2030 cut-off events. [2024-06-28 00:03:48,455 INFO L125 PetriNetUnfolderBase]: For 35055/35114 co-relation queries the response was YES. [2024-06-28 00:03:48,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10814 conditions, 2030 events. 1070/2030 cut-off events. For 35055/35114 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13028 event pairs, 359 based on Foata normal form. 28/2007 useless extension candidates. Maximal degree in co-relation 10747. Up to 1531 conditions per place. [2024-06-28 00:03:48,471 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 104 selfloop transitions, 51 changer transitions 0/164 dead transitions. [2024-06-28 00:03:48,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 164 transitions, 2415 flow [2024-06-28 00:03:48,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:03:48,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:03:48,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-28 00:03:48,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 00:03:48,473 INFO L175 Difference]: Start difference. First operand has 144 places, 149 transitions, 2007 flow. Second operand 6 states and 126 transitions. [2024-06-28 00:03:48,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 164 transitions, 2415 flow [2024-06-28 00:03:48,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 164 transitions, 2301 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-28 00:03:48,529 INFO L231 Difference]: Finished difference. Result has 148 places, 149 transitions, 2001 flow [2024-06-28 00:03:48,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1893, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2001, PETRI_PLACES=148, PETRI_TRANSITIONS=149} [2024-06-28 00:03:48,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-28 00:03:48,530 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 149 transitions, 2001 flow [2024-06-28 00:03:48,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:48,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:48,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:48,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 00:03:48,530 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:48,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:48,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1320751706, now seen corresponding path program 1 times [2024-06-28 00:03:48,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:48,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022372739] [2024-06-28 00:03:48,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:48,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:48,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:48,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:48,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022372739] [2024-06-28 00:03:48,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022372739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:48,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:48,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:48,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115196320] [2024-06-28 00:03:48,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:48,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:48,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:48,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:48,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:48,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:48,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 149 transitions, 2001 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:48,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:48,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:48,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:49,391 INFO L124 PetriNetUnfolderBase]: 1113/2111 cut-off events. [2024-06-28 00:03:49,391 INFO L125 PetriNetUnfolderBase]: For 38095/38113 co-relation queries the response was YES. [2024-06-28 00:03:49,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11405 conditions, 2111 events. 1113/2111 cut-off events. For 38095/38113 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13666 event pairs, 328 based on Foata normal form. 14/2086 useless extension candidates. Maximal degree in co-relation 11336. Up to 1535 conditions per place. [2024-06-28 00:03:49,414 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 144 selfloop transitions, 34 changer transitions 0/187 dead transitions. [2024-06-28 00:03:49,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 187 transitions, 2575 flow [2024-06-28 00:03:49,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:49,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:49,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-28 00:03:49,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2024-06-28 00:03:49,416 INFO L175 Difference]: Start difference. First operand has 148 places, 149 transitions, 2001 flow. Second operand 8 states and 170 transitions. [2024-06-28 00:03:49,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 187 transitions, 2575 flow [2024-06-28 00:03:49,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 187 transitions, 2495 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 00:03:49,479 INFO L231 Difference]: Finished difference. Result has 153 places, 154 transitions, 2068 flow [2024-06-28 00:03:49,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2068, PETRI_PLACES=153, PETRI_TRANSITIONS=154} [2024-06-28 00:03:49,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-28 00:03:49,480 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 154 transitions, 2068 flow [2024-06-28 00:03:49,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:49,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:49,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:49,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 00:03:49,480 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:49,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:49,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1215709996, now seen corresponding path program 1 times [2024-06-28 00:03:49,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:49,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464576230] [2024-06-28 00:03:49,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:49,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:49,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:49,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464576230] [2024-06-28 00:03:49,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464576230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:49,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:49,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:49,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355815345] [2024-06-28 00:03:49,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:49,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:49,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:49,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:49,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:49,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:49,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 154 transitions, 2068 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:49,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:49,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:49,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:50,210 INFO L124 PetriNetUnfolderBase]: 1121/2111 cut-off events. [2024-06-28 00:03:50,210 INFO L125 PetriNetUnfolderBase]: For 39778/39778 co-relation queries the response was YES. [2024-06-28 00:03:50,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11689 conditions, 2111 events. 1121/2111 cut-off events. For 39778/39778 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13620 event pairs, 353 based on Foata normal form. 2/2071 useless extension candidates. Maximal degree in co-relation 11619. Up to 1702 conditions per place. [2024-06-28 00:03:50,226 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 139 selfloop transitions, 33 changer transitions 0/181 dead transitions. [2024-06-28 00:03:50,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 181 transitions, 2564 flow [2024-06-28 00:03:50,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:03:50,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:03:50,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-28 00:03:50,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-28 00:03:50,227 INFO L175 Difference]: Start difference. First operand has 153 places, 154 transitions, 2068 flow. Second operand 7 states and 150 transitions. [2024-06-28 00:03:50,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 181 transitions, 2564 flow [2024-06-28 00:03:50,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 181 transitions, 2482 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-28 00:03:50,299 INFO L231 Difference]: Finished difference. Result has 156 places, 156 transitions, 2087 flow [2024-06-28 00:03:50,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2087, PETRI_PLACES=156, PETRI_TRANSITIONS=156} [2024-06-28 00:03:50,300 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-28 00:03:50,300 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 156 transitions, 2087 flow [2024-06-28 00:03:50,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:50,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:50,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:50,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 00:03:50,301 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:50,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:50,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1211061856, now seen corresponding path program 2 times [2024-06-28 00:03:50,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:50,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637292105] [2024-06-28 00:03:50,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:50,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:50,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:50,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637292105] [2024-06-28 00:03:50,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637292105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:50,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:50,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:50,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410246396] [2024-06-28 00:03:50,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:50,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:50,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:50,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:50,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:50,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:50,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 156 transitions, 2087 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:50,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:50,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:50,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:50,973 INFO L124 PetriNetUnfolderBase]: 1129/2125 cut-off events. [2024-06-28 00:03:50,973 INFO L125 PetriNetUnfolderBase]: For 42421/42421 co-relation queries the response was YES. [2024-06-28 00:03:50,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11758 conditions, 2125 events. 1129/2125 cut-off events. For 42421/42421 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13699 event pairs, 356 based on Foata normal form. 2/2085 useless extension candidates. Maximal degree in co-relation 11686. Up to 1710 conditions per place. [2024-06-28 00:03:50,992 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 137 selfloop transitions, 34 changer transitions 0/180 dead transitions. [2024-06-28 00:03:50,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 180 transitions, 2577 flow [2024-06-28 00:03:50,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:50,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:50,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-28 00:03:50,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-28 00:03:50,993 INFO L175 Difference]: Start difference. First operand has 156 places, 156 transitions, 2087 flow. Second operand 8 states and 163 transitions. [2024-06-28 00:03:50,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 180 transitions, 2577 flow [2024-06-28 00:03:51,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 180 transitions, 2493 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 00:03:51,058 INFO L231 Difference]: Finished difference. Result has 159 places, 158 transitions, 2111 flow [2024-06-28 00:03:51,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2007, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2111, PETRI_PLACES=159, PETRI_TRANSITIONS=158} [2024-06-28 00:03:51,058 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-28 00:03:51,058 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 158 transitions, 2111 flow [2024-06-28 00:03:51,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:51,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:51,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:51,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 00:03:51,059 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:51,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:51,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1534809908, now seen corresponding path program 3 times [2024-06-28 00:03:51,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:51,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085116805] [2024-06-28 00:03:51,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:51,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:51,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:51,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085116805] [2024-06-28 00:03:51,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085116805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:51,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:51,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:51,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320768828] [2024-06-28 00:03:51,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:51,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:51,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:51,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:51,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:51,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:51,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 158 transitions, 2111 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:51,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:51,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:51,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:51,853 INFO L124 PetriNetUnfolderBase]: 1137/2141 cut-off events. [2024-06-28 00:03:51,853 INFO L125 PetriNetUnfolderBase]: For 45779/45791 co-relation queries the response was YES. [2024-06-28 00:03:51,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11884 conditions, 2141 events. 1137/2141 cut-off events. For 45779/45791 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13920 event pairs, 378 based on Foata normal form. 10/2101 useless extension candidates. Maximal degree in co-relation 11811. Up to 1718 conditions per place. [2024-06-28 00:03:51,874 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 130 selfloop transitions, 38 changer transitions 0/177 dead transitions. [2024-06-28 00:03:51,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 177 transitions, 2583 flow [2024-06-28 00:03:51,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:51,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:51,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-28 00:03:51,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-28 00:03:51,876 INFO L175 Difference]: Start difference. First operand has 159 places, 158 transitions, 2111 flow. Second operand 8 states and 157 transitions. [2024-06-28 00:03:51,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 177 transitions, 2583 flow [2024-06-28 00:03:51,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 177 transitions, 2493 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 00:03:51,944 INFO L231 Difference]: Finished difference. Result has 161 places, 160 transitions, 2137 flow [2024-06-28 00:03:51,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2137, PETRI_PLACES=161, PETRI_TRANSITIONS=160} [2024-06-28 00:03:51,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-28 00:03:51,945 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 160 transitions, 2137 flow [2024-06-28 00:03:51,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:51,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:51,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:51,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 00:03:51,945 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:51,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:51,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1238754638, now seen corresponding path program 4 times [2024-06-28 00:03:51,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:51,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907565661] [2024-06-28 00:03:51,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:51,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:52,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:52,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907565661] [2024-06-28 00:03:52,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907565661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:52,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:52,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:52,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357254812] [2024-06-28 00:03:52,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:52,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:52,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:52,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:52,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:52,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:52,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 160 transitions, 2137 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:52,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:52,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:52,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:52,640 INFO L124 PetriNetUnfolderBase]: 1128/2130 cut-off events. [2024-06-28 00:03:52,641 INFO L125 PetriNetUnfolderBase]: For 46500/46512 co-relation queries the response was YES. [2024-06-28 00:03:52,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11814 conditions, 2130 events. 1128/2130 cut-off events. For 46500/46512 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13744 event pairs, 357 based on Foata normal form. 10/2096 useless extension candidates. Maximal degree in co-relation 11740. Up to 1706 conditions per place. [2024-06-28 00:03:52,661 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 131 selfloop transitions, 34 changer transitions 0/174 dead transitions. [2024-06-28 00:03:52,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 174 transitions, 2501 flow [2024-06-28 00:03:52,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:03:52,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:03:52,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-28 00:03:52,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 00:03:52,663 INFO L175 Difference]: Start difference. First operand has 161 places, 160 transitions, 2137 flow. Second operand 6 states and 126 transitions. [2024-06-28 00:03:52,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 174 transitions, 2501 flow [2024-06-28 00:03:52,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 174 transitions, 2404 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 00:03:52,736 INFO L231 Difference]: Finished difference. Result has 161 places, 160 transitions, 2119 flow [2024-06-28 00:03:52,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2040, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2119, PETRI_PLACES=161, PETRI_TRANSITIONS=160} [2024-06-28 00:03:52,737 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-28 00:03:52,737 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 160 transitions, 2119 flow [2024-06-28 00:03:52,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:52,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:52,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:52,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 00:03:52,737 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:52,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:52,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1068409719, now seen corresponding path program 1 times [2024-06-28 00:03:52,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:52,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82030170] [2024-06-28 00:03:52,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:52,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:52,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:52,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82030170] [2024-06-28 00:03:52,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82030170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:52,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:52,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:52,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567036848] [2024-06-28 00:03:52,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:52,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:52,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:52,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:52,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:52,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:52,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 160 transitions, 2119 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:52,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:52,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:52,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:53,378 INFO L124 PetriNetUnfolderBase]: 1195/2225 cut-off events. [2024-06-28 00:03:53,378 INFO L125 PetriNetUnfolderBase]: For 53013/53013 co-relation queries the response was YES. [2024-06-28 00:03:53,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12808 conditions, 2225 events. 1195/2225 cut-off events. For 53013/53013 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14335 event pairs, 263 based on Foata normal form. 2/2185 useless extension candidates. Maximal degree in co-relation 12733. Up to 1501 conditions per place. [2024-06-28 00:03:53,400 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 136 selfloop transitions, 51 changer transitions 0/196 dead transitions. [2024-06-28 00:03:53,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 196 transitions, 2810 flow [2024-06-28 00:03:53,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:03:53,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:03:53,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-28 00:03:53,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-28 00:03:53,402 INFO L175 Difference]: Start difference. First operand has 161 places, 160 transitions, 2119 flow. Second operand 6 states and 138 transitions. [2024-06-28 00:03:53,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 196 transitions, 2810 flow [2024-06-28 00:03:53,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 196 transitions, 2704 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 00:03:53,485 INFO L231 Difference]: Finished difference. Result has 162 places, 170 transitions, 2351 flow [2024-06-28 00:03:53,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2015, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2351, PETRI_PLACES=162, PETRI_TRANSITIONS=170} [2024-06-28 00:03:53,485 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-28 00:03:53,485 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 170 transitions, 2351 flow [2024-06-28 00:03:53,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:53,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:53,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:53,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 00:03:53,486 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:53,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:53,486 INFO L85 PathProgramCache]: Analyzing trace with hash -2101068749, now seen corresponding path program 2 times [2024-06-28 00:03:53,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:53,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58920215] [2024-06-28 00:03:53,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:53,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:53,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:53,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:53,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:53,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58920215] [2024-06-28 00:03:53,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58920215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:53,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:53,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:53,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599168904] [2024-06-28 00:03:53,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:53,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:53,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:53,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:53,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:53,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:53,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 170 transitions, 2351 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:53,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:53,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:53,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:54,219 INFO L124 PetriNetUnfolderBase]: 1190/2218 cut-off events. [2024-06-28 00:03:54,219 INFO L125 PetriNetUnfolderBase]: For 53367/53367 co-relation queries the response was YES. [2024-06-28 00:03:54,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13014 conditions, 2218 events. 1190/2218 cut-off events. For 53367/53367 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14339 event pairs, 267 based on Foata normal form. 2/2176 useless extension candidates. Maximal degree in co-relation 12938. Up to 1499 conditions per place. [2024-06-28 00:03:54,243 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 128 selfloop transitions, 64 changer transitions 0/201 dead transitions. [2024-06-28 00:03:54,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 201 transitions, 2922 flow [2024-06-28 00:03:54,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:54,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:54,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-28 00:03:54,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-28 00:03:54,244 INFO L175 Difference]: Start difference. First operand has 162 places, 170 transitions, 2351 flow. Second operand 8 states and 172 transitions. [2024-06-28 00:03:54,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 201 transitions, 2922 flow [2024-06-28 00:03:54,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 201 transitions, 2870 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-28 00:03:54,377 INFO L231 Difference]: Finished difference. Result has 168 places, 172 transitions, 2494 flow [2024-06-28 00:03:54,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2494, PETRI_PLACES=168, PETRI_TRANSITIONS=172} [2024-06-28 00:03:54,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-28 00:03:54,378 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 172 transitions, 2494 flow [2024-06-28 00:03:54,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:54,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:54,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:54,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 00:03:54,378 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:54,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:54,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1992443819, now seen corresponding path program 3 times [2024-06-28 00:03:54,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:54,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160939117] [2024-06-28 00:03:54,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:54,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:54,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:54,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160939117] [2024-06-28 00:03:54,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160939117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:54,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:54,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:54,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239061282] [2024-06-28 00:03:54,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:54,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:54,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:54,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:54,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:54,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:54,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 172 transitions, 2494 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:54,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:54,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:54,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:55,030 INFO L124 PetriNetUnfolderBase]: 1231/2295 cut-off events. [2024-06-28 00:03:55,031 INFO L125 PetriNetUnfolderBase]: For 60442/60442 co-relation queries the response was YES. [2024-06-28 00:03:55,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14004 conditions, 2295 events. 1231/2295 cut-off events. For 60442/60442 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14947 event pairs, 264 based on Foata normal form. 2/2257 useless extension candidates. Maximal degree in co-relation 13926. Up to 1448 conditions per place. [2024-06-28 00:03:55,054 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 148 selfloop transitions, 57 changer transitions 0/214 dead transitions. [2024-06-28 00:03:55,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 214 transitions, 3222 flow [2024-06-28 00:03:55,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:55,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:55,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-28 00:03:55,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5327380952380952 [2024-06-28 00:03:55,055 INFO L175 Difference]: Start difference. First operand has 168 places, 172 transitions, 2494 flow. Second operand 8 states and 179 transitions. [2024-06-28 00:03:55,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 214 transitions, 3222 flow [2024-06-28 00:03:55,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 214 transitions, 3056 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-28 00:03:55,154 INFO L231 Difference]: Finished difference. Result has 170 places, 175 transitions, 2513 flow [2024-06-28 00:03:55,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2336, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2513, PETRI_PLACES=170, PETRI_TRANSITIONS=175} [2024-06-28 00:03:55,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-28 00:03:55,155 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 175 transitions, 2513 flow [2024-06-28 00:03:55,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:55,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:55,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:55,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 00:03:55,156 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:55,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:55,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1992265073, now seen corresponding path program 1 times [2024-06-28 00:03:55,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:55,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658081129] [2024-06-28 00:03:55,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:55,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:55,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:55,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658081129] [2024-06-28 00:03:55,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658081129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:55,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:55,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:55,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333470099] [2024-06-28 00:03:55,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:55,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:55,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:55,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:55,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:55,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:55,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 175 transitions, 2513 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:55,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:55,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:55,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:55,898 INFO L124 PetriNetUnfolderBase]: 1257/2328 cut-off events. [2024-06-28 00:03:55,898 INFO L125 PetriNetUnfolderBase]: For 61686/61692 co-relation queries the response was YES. [2024-06-28 00:03:55,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14315 conditions, 2328 events. 1257/2328 cut-off events. For 61686/61692 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 15093 event pairs, 351 based on Foata normal form. 7/2290 useless extension candidates. Maximal degree in co-relation 14236. Up to 1737 conditions per place. [2024-06-28 00:03:55,916 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 144 selfloop transitions, 72 changer transitions 0/225 dead transitions. [2024-06-28 00:03:55,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 225 transitions, 3305 flow [2024-06-28 00:03:55,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:03:55,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:03:55,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-28 00:03:55,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-28 00:03:55,918 INFO L175 Difference]: Start difference. First operand has 170 places, 175 transitions, 2513 flow. Second operand 9 states and 203 transitions. [2024-06-28 00:03:55,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 225 transitions, 3305 flow [2024-06-28 00:03:56,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 225 transitions, 3233 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-28 00:03:56,028 INFO L231 Difference]: Finished difference. Result has 175 places, 180 transitions, 2674 flow [2024-06-28 00:03:56,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2441, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2674, PETRI_PLACES=175, PETRI_TRANSITIONS=180} [2024-06-28 00:03:56,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-28 00:03:56,029 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 180 transitions, 2674 flow [2024-06-28 00:03:56,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:56,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:56,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:56,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 00:03:56,030 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:56,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:56,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1779482929, now seen corresponding path program 4 times [2024-06-28 00:03:56,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:56,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661692091] [2024-06-28 00:03:56,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:56,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:56,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:56,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:56,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661692091] [2024-06-28 00:03:56,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661692091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:56,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:56,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:56,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256422826] [2024-06-28 00:03:56,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:56,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:56,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:56,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:56,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:56,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:56,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 180 transitions, 2674 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:56,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:56,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:56,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:56,672 INFO L124 PetriNetUnfolderBase]: 1265/2350 cut-off events. [2024-06-28 00:03:56,672 INFO L125 PetriNetUnfolderBase]: For 66385/66385 co-relation queries the response was YES. [2024-06-28 00:03:56,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14816 conditions, 2350 events. 1265/2350 cut-off events. For 66385/66385 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15286 event pairs, 224 based on Foata normal form. 2/2312 useless extension candidates. Maximal degree in co-relation 14736. Up to 1489 conditions per place. [2024-06-28 00:03:56,694 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 144 selfloop transitions, 62 changer transitions 0/215 dead transitions. [2024-06-28 00:03:56,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 215 transitions, 3312 flow [2024-06-28 00:03:56,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:56,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:56,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-28 00:03:56,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-28 00:03:56,695 INFO L175 Difference]: Start difference. First operand has 175 places, 180 transitions, 2674 flow. Second operand 8 states and 174 transitions. [2024-06-28 00:03:56,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 215 transitions, 3312 flow [2024-06-28 00:03:56,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 215 transitions, 3210 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 00:03:56,806 INFO L231 Difference]: Finished difference. Result has 178 places, 182 transitions, 2752 flow [2024-06-28 00:03:56,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2578, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2752, PETRI_PLACES=178, PETRI_TRANSITIONS=182} [2024-06-28 00:03:56,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-28 00:03:56,807 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 182 transitions, 2752 flow [2024-06-28 00:03:56,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:56,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:56,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:56,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 00:03:56,809 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:56,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:56,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1842169171, now seen corresponding path program 2 times [2024-06-28 00:03:56,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:56,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845109799] [2024-06-28 00:03:56,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:56,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:56,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:56,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845109799] [2024-06-28 00:03:56,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845109799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:56,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:56,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:56,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160381373] [2024-06-28 00:03:56,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:56,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:56,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:56,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:56,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:56,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:56,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 182 transitions, 2752 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:56,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:56,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:56,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:57,513 INFO L124 PetriNetUnfolderBase]: 1270/2355 cut-off events. [2024-06-28 00:03:57,513 INFO L125 PetriNetUnfolderBase]: For 67117/67123 co-relation queries the response was YES. [2024-06-28 00:03:57,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15102 conditions, 2355 events. 1270/2355 cut-off events. For 67117/67123 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15333 event pairs, 343 based on Foata normal form. 7/2319 useless extension candidates. Maximal degree in co-relation 15020. Up to 1753 conditions per place. [2024-06-28 00:03:57,539 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 139 selfloop transitions, 71 changer transitions 0/219 dead transitions. [2024-06-28 00:03:57,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 219 transitions, 3422 flow [2024-06-28 00:03:57,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:57,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:57,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-28 00:03:57,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5327380952380952 [2024-06-28 00:03:57,543 INFO L175 Difference]: Start difference. First operand has 178 places, 182 transitions, 2752 flow. Second operand 8 states and 179 transitions. [2024-06-28 00:03:57,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 219 transitions, 3422 flow [2024-06-28 00:03:57,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 219 transitions, 3310 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 00:03:57,699 INFO L231 Difference]: Finished difference. Result has 181 places, 185 transitions, 2851 flow [2024-06-28 00:03:57,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2640, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2851, PETRI_PLACES=181, PETRI_TRANSITIONS=185} [2024-06-28 00:03:57,700 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-28 00:03:57,700 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 185 transitions, 2851 flow [2024-06-28 00:03:57,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:57,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:57,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:57,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 00:03:57,702 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:57,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:57,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1779482526, now seen corresponding path program 1 times [2024-06-28 00:03:57,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:57,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704871645] [2024-06-28 00:03:57,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:57,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:58,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:58,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:58,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704871645] [2024-06-28 00:03:58,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704871645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:58,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:58,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:58,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468907729] [2024-06-28 00:03:58,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:58,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:58,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:58,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:58,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:58,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:58,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 185 transitions, 2851 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:58,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:58,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:58,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:58,551 INFO L124 PetriNetUnfolderBase]: 1273/2372 cut-off events. [2024-06-28 00:03:58,552 INFO L125 PetriNetUnfolderBase]: For 71160/71166 co-relation queries the response was YES. [2024-06-28 00:03:58,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15263 conditions, 2372 events. 1273/2372 cut-off events. For 71160/71166 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15529 event pairs, 345 based on Foata normal form. 10/2339 useless extension candidates. Maximal degree in co-relation 15180. Up to 1879 conditions per place. [2024-06-28 00:03:58,616 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 162 selfloop transitions, 50 changer transitions 0/221 dead transitions. [2024-06-28 00:03:58,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 221 transitions, 3496 flow [2024-06-28 00:03:58,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:58,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:58,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-28 00:03:58,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-28 00:03:58,621 INFO L175 Difference]: Start difference. First operand has 181 places, 185 transitions, 2851 flow. Second operand 8 states and 176 transitions. [2024-06-28 00:03:58,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 221 transitions, 3496 flow [2024-06-28 00:03:58,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 221 transitions, 3378 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-28 00:03:58,747 INFO L231 Difference]: Finished difference. Result has 185 places, 187 transitions, 2899 flow [2024-06-28 00:03:58,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2736, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2899, PETRI_PLACES=185, PETRI_TRANSITIONS=187} [2024-06-28 00:03:58,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-28 00:03:58,747 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 187 transitions, 2899 flow [2024-06-28 00:03:58,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:58,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:58,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:58,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 00:03:58,748 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:58,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:58,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1785462089, now seen corresponding path program 5 times [2024-06-28 00:03:58,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:58,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356166591] [2024-06-28 00:03:58,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:58,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:58,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:58,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:58,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356166591] [2024-06-28 00:03:58,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356166591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:58,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:58,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:58,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062764827] [2024-06-28 00:03:58,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:58,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:58,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:58,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:58,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:58,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:58,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 187 transitions, 2899 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:58,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:58,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:58,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:59,417 INFO L124 PetriNetUnfolderBase]: 1268/2360 cut-off events. [2024-06-28 00:03:59,417 INFO L125 PetriNetUnfolderBase]: For 69942/69945 co-relation queries the response was YES. [2024-06-28 00:03:59,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15051 conditions, 2360 events. 1268/2360 cut-off events. For 69942/69945 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15452 event pairs, 242 based on Foata normal form. 4/2324 useless extension candidates. Maximal degree in co-relation 14967. Up to 1496 conditions per place. [2024-06-28 00:03:59,439 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 135 selfloop transitions, 67 changer transitions 0/211 dead transitions. [2024-06-28 00:03:59,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 211 transitions, 3474 flow [2024-06-28 00:03:59,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:03:59,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:03:59,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-28 00:03:59,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-28 00:03:59,440 INFO L175 Difference]: Start difference. First operand has 185 places, 187 transitions, 2899 flow. Second operand 7 states and 150 transitions. [2024-06-28 00:03:59,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 211 transitions, 3474 flow [2024-06-28 00:03:59,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 211 transitions, 3350 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 00:03:59,569 INFO L231 Difference]: Finished difference. Result has 186 places, 189 transitions, 2961 flow [2024-06-28 00:03:59,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2775, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2961, PETRI_PLACES=186, PETRI_TRANSITIONS=189} [2024-06-28 00:03:59,570 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-28 00:03:59,570 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 189 transitions, 2961 flow [2024-06-28 00:03:59,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:59,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:59,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:59,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 00:03:59,570 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:59,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:59,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1785461903, now seen corresponding path program 3 times [2024-06-28 00:03:59,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:59,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321761476] [2024-06-28 00:03:59,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:59,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:59,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:59,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321761476] [2024-06-28 00:03:59,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321761476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:59,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:59,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:59,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053123970] [2024-06-28 00:03:59,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:59,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:59,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:59,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:59,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:59,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:03:59,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 189 transitions, 2961 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:59,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:59,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:03:59,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:00,254 INFO L124 PetriNetUnfolderBase]: 1265/2359 cut-off events. [2024-06-28 00:04:00,255 INFO L125 PetriNetUnfolderBase]: For 70022/70034 co-relation queries the response was YES. [2024-06-28 00:04:00,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15176 conditions, 2359 events. 1265/2359 cut-off events. For 70022/70034 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15428 event pairs, 333 based on Foata normal form. 11/2330 useless extension candidates. Maximal degree in co-relation 15091. Up to 1746 conditions per place. [2024-06-28 00:04:00,284 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 130 selfloop transitions, 76 changer transitions 0/215 dead transitions. [2024-06-28 00:04:00,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 215 transitions, 3573 flow [2024-06-28 00:04:00,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:04:00,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:04:00,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-28 00:04:00,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272108843537415 [2024-06-28 00:04:00,285 INFO L175 Difference]: Start difference. First operand has 186 places, 189 transitions, 2961 flow. Second operand 7 states and 155 transitions. [2024-06-28 00:04:00,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 215 transitions, 3573 flow [2024-06-28 00:04:00,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 215 transitions, 3447 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 00:04:00,457 INFO L231 Difference]: Finished difference. Result has 189 places, 192 transitions, 3059 flow [2024-06-28 00:04:00,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2835, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3059, PETRI_PLACES=189, PETRI_TRANSITIONS=192} [2024-06-28 00:04:00,458 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-28 00:04:00,458 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 192 transitions, 3059 flow [2024-06-28 00:04:00,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:00,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:00,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:00,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 00:04:00,458 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:00,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:00,459 INFO L85 PathProgramCache]: Analyzing trace with hash -159539898, now seen corresponding path program 2 times [2024-06-28 00:04:00,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:00,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499975354] [2024-06-28 00:04:00,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:00,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:00,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:00,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:00,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499975354] [2024-06-28 00:04:00,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499975354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:00,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:00,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:04:00,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222491663] [2024-06-28 00:04:00,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:00,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:04:00,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:00,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:04:00,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:04:00,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:00,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 192 transitions, 3059 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:00,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:00,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:00,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:01,363 INFO L124 PetriNetUnfolderBase]: 1260/2350 cut-off events. [2024-06-28 00:04:01,363 INFO L125 PetriNetUnfolderBase]: For 72714/72732 co-relation queries the response was YES. [2024-06-28 00:04:01,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15149 conditions, 2350 events. 1260/2350 cut-off events. For 72714/72732 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15351 event pairs, 361 based on Foata normal form. 12/2314 useless extension candidates. Maximal degree in co-relation 15063. Up to 1864 conditions per place. [2024-06-28 00:04:01,386 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 150 selfloop transitions, 54 changer transitions 0/213 dead transitions. [2024-06-28 00:04:01,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 213 transitions, 3527 flow [2024-06-28 00:04:01,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:04:01,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:04:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-28 00:04:01,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-28 00:04:01,388 INFO L175 Difference]: Start difference. First operand has 189 places, 192 transitions, 3059 flow. Second operand 8 states and 161 transitions. [2024-06-28 00:04:01,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 213 transitions, 3527 flow [2024-06-28 00:04:01,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 213 transitions, 3375 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-28 00:04:01,516 INFO L231 Difference]: Finished difference. Result has 193 places, 192 transitions, 3036 flow [2024-06-28 00:04:01,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2907, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3036, PETRI_PLACES=193, PETRI_TRANSITIONS=192} [2024-06-28 00:04:01,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-28 00:04:01,517 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 192 transitions, 3036 flow [2024-06-28 00:04:01,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:01,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:01,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:01,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 00:04:01,517 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:01,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:01,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1509239411, now seen corresponding path program 4 times [2024-06-28 00:04:01,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:01,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494428297] [2024-06-28 00:04:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:01,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:01,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:01,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494428297] [2024-06-28 00:04:01,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494428297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:01,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:01,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:04:01,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150895863] [2024-06-28 00:04:01,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:01,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:04:01,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:01,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:04:01,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:04:01,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:01,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 192 transitions, 3036 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:01,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:01,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:01,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:02,422 INFO L124 PetriNetUnfolderBase]: 1265/2365 cut-off events. [2024-06-28 00:04:02,422 INFO L125 PetriNetUnfolderBase]: For 73080/73098 co-relation queries the response was YES. [2024-06-28 00:04:02,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15137 conditions, 2365 events. 1265/2365 cut-off events. For 73080/73098 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15575 event pairs, 350 based on Foata normal form. 11/2330 useless extension candidates. Maximal degree in co-relation 15050. Up to 1651 conditions per place. [2024-06-28 00:04:02,445 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 139 selfloop transitions, 77 changer transitions 0/225 dead transitions. [2024-06-28 00:04:02,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 225 transitions, 3812 flow [2024-06-28 00:04:02,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:04:02,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:04:02,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-28 00:04:02,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272108843537415 [2024-06-28 00:04:02,446 INFO L175 Difference]: Start difference. First operand has 193 places, 192 transitions, 3036 flow. Second operand 7 states and 155 transitions. [2024-06-28 00:04:02,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 225 transitions, 3812 flow [2024-06-28 00:04:02,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 225 transitions, 3701 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 00:04:02,582 INFO L231 Difference]: Finished difference. Result has 195 places, 197 transitions, 3179 flow [2024-06-28 00:04:02,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2929, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3179, PETRI_PLACES=195, PETRI_TRANSITIONS=197} [2024-06-28 00:04:02,583 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-28 00:04:02,583 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 197 transitions, 3179 flow [2024-06-28 00:04:02,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:02,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:02,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:02,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 00:04:02,583 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:02,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:02,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1111781480, now seen corresponding path program 3 times [2024-06-28 00:04:02,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:02,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008837450] [2024-06-28 00:04:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:02,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:02,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:02,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008837450] [2024-06-28 00:04:02,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008837450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:02,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:02,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:04:02,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452822323] [2024-06-28 00:04:02,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:02,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:04:02,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:02,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:04:02,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:04:02,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:02,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 197 transitions, 3179 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:02,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:02,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:02,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:03,560 INFO L124 PetriNetUnfolderBase]: 1273/2371 cut-off events. [2024-06-28 00:04:03,560 INFO L125 PetriNetUnfolderBase]: For 75629/75647 co-relation queries the response was YES. [2024-06-28 00:04:03,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15399 conditions, 2371 events. 1273/2371 cut-off events. For 75629/75647 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 15537 event pairs, 358 based on Foata normal form. 12/2338 useless extension candidates. Maximal degree in co-relation 15311. Up to 1828 conditions per place. [2024-06-28 00:04:03,591 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 159 selfloop transitions, 53 changer transitions 0/221 dead transitions. [2024-06-28 00:04:03,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 221 transitions, 3781 flow [2024-06-28 00:04:03,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:04:03,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:04:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-28 00:04:03,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-28 00:04:03,593 INFO L175 Difference]: Start difference. First operand has 195 places, 197 transitions, 3179 flow. Second operand 6 states and 133 transitions. [2024-06-28 00:04:03,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 221 transitions, 3781 flow [2024-06-28 00:04:03,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 221 transitions, 3665 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-28 00:04:03,779 INFO L231 Difference]: Finished difference. Result has 198 places, 199 transitions, 3217 flow [2024-06-28 00:04:03,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3065, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3217, PETRI_PLACES=198, PETRI_TRANSITIONS=199} [2024-06-28 00:04:03,781 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-28 00:04:03,781 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 199 transitions, 3217 flow [2024-06-28 00:04:03,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:03,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:03,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:03,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 00:04:03,781 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:03,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:03,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1111572943, now seen corresponding path program 5 times [2024-06-28 00:04:03,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:03,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186354852] [2024-06-28 00:04:03,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:03,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:04,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:04,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186354852] [2024-06-28 00:04:04,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186354852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:04,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:04,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:04:04,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963822711] [2024-06-28 00:04:04,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:04,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:04:04,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:04,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:04:04,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:04:04,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:04,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 199 transitions, 3217 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:04,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:04,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:04,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:04,761 INFO L124 PetriNetUnfolderBase]: 1286/2389 cut-off events. [2024-06-28 00:04:04,761 INFO L125 PetriNetUnfolderBase]: For 78348/78366 co-relation queries the response was YES. [2024-06-28 00:04:04,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15782 conditions, 2389 events. 1286/2389 cut-off events. For 78348/78366 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15656 event pairs, 329 based on Foata normal form. 11/2358 useless extension candidates. Maximal degree in co-relation 15692. Up to 1665 conditions per place. [2024-06-28 00:04:04,786 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 140 selfloop transitions, 79 changer transitions 0/228 dead transitions. [2024-06-28 00:04:04,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 228 transitions, 4035 flow [2024-06-28 00:04:04,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:04:04,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:04:04,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-28 00:04:04,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136054421768708 [2024-06-28 00:04:04,788 INFO L175 Difference]: Start difference. First operand has 198 places, 199 transitions, 3217 flow. Second operand 7 states and 151 transitions. [2024-06-28 00:04:04,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 228 transitions, 4035 flow [2024-06-28 00:04:04,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 228 transitions, 3947 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-28 00:04:04,952 INFO L231 Difference]: Finished difference. Result has 203 places, 205 transitions, 3438 flow [2024-06-28 00:04:04,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3129, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3438, PETRI_PLACES=203, PETRI_TRANSITIONS=205} [2024-06-28 00:04:04,952 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-28 00:04:04,952 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 205 transitions, 3438 flow [2024-06-28 00:04:04,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:04,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:04,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:04,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 00:04:04,953 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:04,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:04,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1652892605, now seen corresponding path program 6 times [2024-06-28 00:04:04,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:04,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759823568] [2024-06-28 00:04:04,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:04,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:05,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:05,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759823568] [2024-06-28 00:04:05,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759823568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:05,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:05,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:04:05,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476352387] [2024-06-28 00:04:05,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:05,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:04:05,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:05,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:04:05,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:04:05,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:05,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 205 transitions, 3438 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:05,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:05,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:05,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:05,917 INFO L124 PetriNetUnfolderBase]: 1294/2399 cut-off events. [2024-06-28 00:04:05,917 INFO L125 PetriNetUnfolderBase]: For 84790/84796 co-relation queries the response was YES. [2024-06-28 00:04:05,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16208 conditions, 2399 events. 1294/2399 cut-off events. For 84790/84796 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15722 event pairs, 284 based on Foata normal form. 3/2347 useless extension candidates. Maximal degree in co-relation 16116. Up to 1356 conditions per place. [2024-06-28 00:04:05,942 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 151 selfloop transitions, 68 changer transitions 0/228 dead transitions. [2024-06-28 00:04:05,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 228 transitions, 4096 flow [2024-06-28 00:04:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:04:05,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:04:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-28 00:04:05,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-28 00:04:05,944 INFO L175 Difference]: Start difference. First operand has 203 places, 205 transitions, 3438 flow. Second operand 7 states and 144 transitions. [2024-06-28 00:04:05,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 228 transitions, 4096 flow [2024-06-28 00:04:06,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 228 transitions, 3949 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-28 00:04:06,120 INFO L231 Difference]: Finished difference. Result has 207 places, 207 transitions, 3488 flow [2024-06-28 00:04:06,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3291, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3488, PETRI_PLACES=207, PETRI_TRANSITIONS=207} [2024-06-28 00:04:06,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-28 00:04:06,121 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 207 transitions, 3488 flow [2024-06-28 00:04:06,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:06,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:06,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:06,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 00:04:06,121 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:06,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:06,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1111335793, now seen corresponding path program 6 times [2024-06-28 00:04:06,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:06,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37981280] [2024-06-28 00:04:06,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:06,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:06,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:06,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:06,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37981280] [2024-06-28 00:04:06,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37981280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:06,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:06,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:04:06,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895281646] [2024-06-28 00:04:06,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:06,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:04:06,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:06,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:04:06,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:04:06,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:06,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 207 transitions, 3488 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:06,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:06,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:06,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:06,956 INFO L124 PetriNetUnfolderBase]: 1291/2405 cut-off events. [2024-06-28 00:04:06,956 INFO L125 PetriNetUnfolderBase]: For 86971/86989 co-relation queries the response was YES. [2024-06-28 00:04:06,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16376 conditions, 2405 events. 1291/2405 cut-off events. For 86971/86989 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15808 event pairs, 343 based on Foata normal form. 11/2370 useless extension candidates. Maximal degree in co-relation 16283. Up to 1675 conditions per place. [2024-06-28 00:04:06,981 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 142 selfloop transitions, 78 changer transitions 0/229 dead transitions. [2024-06-28 00:04:06,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 229 transitions, 4110 flow [2024-06-28 00:04:06,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:04:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:04:06,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-28 00:04:06,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-28 00:04:06,982 INFO L175 Difference]: Start difference. First operand has 207 places, 207 transitions, 3488 flow. Second operand 7 states and 150 transitions. [2024-06-28 00:04:06,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 229 transitions, 4110 flow [2024-06-28 00:04:07,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 229 transitions, 3902 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-28 00:04:07,150 INFO L231 Difference]: Finished difference. Result has 209 places, 207 transitions, 3442 flow [2024-06-28 00:04:07,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3280, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3442, PETRI_PLACES=209, PETRI_TRANSITIONS=207} [2024-06-28 00:04:07,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-28 00:04:07,151 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 207 transitions, 3442 flow [2024-06-28 00:04:07,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:07,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:07,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:07,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 00:04:07,151 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:07,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:07,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1645127844, now seen corresponding path program 4 times [2024-06-28 00:04:07,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:07,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350134683] [2024-06-28 00:04:07,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:07,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:07,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:07,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350134683] [2024-06-28 00:04:07,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350134683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:07,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:07,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:04:07,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357549683] [2024-06-28 00:04:07,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:07,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:04:07,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:07,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:04:07,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:04:07,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:07,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 207 transitions, 3442 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:07,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:07,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:07,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:08,185 INFO L124 PetriNetUnfolderBase]: 1299/2419 cut-off events. [2024-06-28 00:04:08,185 INFO L125 PetriNetUnfolderBase]: For 89882/89900 co-relation queries the response was YES. [2024-06-28 00:04:08,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16380 conditions, 2419 events. 1299/2419 cut-off events. For 89882/89900 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 15845 event pairs, 342 based on Foata normal form. 12/2385 useless extension candidates. Maximal degree in co-relation 16286. Up to 1862 conditions per place. [2024-06-28 00:04:08,208 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 165 selfloop transitions, 62 changer transitions 0/236 dead transitions. [2024-06-28 00:04:08,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 236 transitions, 4099 flow [2024-06-28 00:04:08,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:04:08,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:04:08,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-28 00:04:08,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-28 00:04:08,209 INFO L175 Difference]: Start difference. First operand has 209 places, 207 transitions, 3442 flow. Second operand 8 states and 167 transitions. [2024-06-28 00:04:08,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 236 transitions, 4099 flow [2024-06-28 00:04:08,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 236 transitions, 3924 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 00:04:08,375 INFO L231 Difference]: Finished difference. Result has 211 places, 209 transitions, 3449 flow [2024-06-28 00:04:08,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3269, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3449, PETRI_PLACES=211, PETRI_TRANSITIONS=209} [2024-06-28 00:04:08,376 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-28 00:04:08,376 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 209 transitions, 3449 flow [2024-06-28 00:04:08,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:08,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:08,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:08,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 00:04:08,377 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:08,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:08,377 INFO L85 PathProgramCache]: Analyzing trace with hash 2137033167, now seen corresponding path program 7 times [2024-06-28 00:04:08,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:08,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198778016] [2024-06-28 00:04:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:08,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:08,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:08,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198778016] [2024-06-28 00:04:08,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198778016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:08,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:08,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:04:08,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452654717] [2024-06-28 00:04:08,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:08,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:04:08,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:08,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:04:08,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:04:08,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:08,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 209 transitions, 3449 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:08,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:08,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:08,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:09,155 INFO L124 PetriNetUnfolderBase]: 1304/2419 cut-off events. [2024-06-28 00:04:09,155 INFO L125 PetriNetUnfolderBase]: For 97375/97427 co-relation queries the response was YES. [2024-06-28 00:04:09,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16501 conditions, 2419 events. 1304/2419 cut-off events. For 97375/97427 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 15916 event pairs, 409 based on Foata normal form. 24/2382 useless extension candidates. Maximal degree in co-relation 16406. Up to 1683 conditions per place. [2024-06-28 00:04:09,181 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 131 selfloop transitions, 92 changer transitions 0/232 dead transitions. [2024-06-28 00:04:09,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 232 transitions, 4259 flow [2024-06-28 00:04:09,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:04:09,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:04:09,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-28 00:04:09,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-06-28 00:04:09,182 INFO L175 Difference]: Start difference. First operand has 211 places, 209 transitions, 3449 flow. Second operand 7 states and 146 transitions. [2024-06-28 00:04:09,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 232 transitions, 4259 flow [2024-06-28 00:04:09,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 232 transitions, 4132 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 00:04:09,342 INFO L231 Difference]: Finished difference. Result has 212 places, 215 transitions, 3666 flow [2024-06-28 00:04:09,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3330, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3666, PETRI_PLACES=212, PETRI_TRANSITIONS=215} [2024-06-28 00:04:09,343 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-28 00:04:09,343 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 215 transitions, 3666 flow [2024-06-28 00:04:09,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:09,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:09,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:09,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 00:04:09,343 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:09,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:09,344 INFO L85 PathProgramCache]: Analyzing trace with hash 508545285, now seen corresponding path program 8 times [2024-06-28 00:04:09,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:09,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124410355] [2024-06-28 00:04:09,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:09,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:09,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:09,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124410355] [2024-06-28 00:04:09,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124410355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:09,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:09,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:09,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252875781] [2024-06-28 00:04:09,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:09,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:09,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:09,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:09,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:09,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:04:09,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 215 transitions, 3666 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 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) [2024-06-28 00:04:09,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:09,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:04:09,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:10,433 INFO L124 PetriNetUnfolderBase]: 1356/2502 cut-off events. [2024-06-28 00:04:10,433 INFO L125 PetriNetUnfolderBase]: For 101528/101577 co-relation queries the response was YES. [2024-06-28 00:04:10,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17311 conditions, 2502 events. 1356/2502 cut-off events. For 101528/101577 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 16468 event pairs, 355 based on Foata normal form. 26/2482 useless extension candidates. Maximal degree in co-relation 17217. Up to 1731 conditions per place. [2024-06-28 00:04:10,460 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 152 selfloop transitions, 87 changer transitions 0/247 dead transitions. [2024-06-28 00:04:10,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 247 transitions, 4678 flow [2024-06-28 00:04:10,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:04:10,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:04:10,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 00:04:10,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-28 00:04:10,461 INFO L175 Difference]: Start difference. First operand has 212 places, 215 transitions, 3666 flow. Second operand 8 states and 156 transitions. [2024-06-28 00:04:10,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 247 transitions, 4678 flow [2024-06-28 00:04:10,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 247 transitions, 4528 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-28 00:04:10,640 INFO L231 Difference]: Finished difference. Result has 217 places, 225 transitions, 3888 flow [2024-06-28 00:04:10,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3528, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3888, PETRI_PLACES=217, PETRI_TRANSITIONS=225} [2024-06-28 00:04:10,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-28 00:04:10,640 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 225 transitions, 3888 flow [2024-06-28 00:04:10,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 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) [2024-06-28 00:04:10,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:10,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:10,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 00:04:10,641 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:10,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:10,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1906939002, now seen corresponding path program 5 times [2024-06-28 00:04:10,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:10,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779812255] [2024-06-28 00:04:10,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:10,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:11,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:11,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779812255] [2024-06-28 00:04:11,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779812255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:11,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:11,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:04:11,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322264350] [2024-06-28 00:04:11,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:11,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:04:11,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:11,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:04:11,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:04:11,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:11,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 225 transitions, 3888 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:11,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:11,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:11,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:11,737 INFO L124 PetriNetUnfolderBase]: 1388/2552 cut-off events. [2024-06-28 00:04:11,738 INFO L125 PetriNetUnfolderBase]: For 101140/101158 co-relation queries the response was YES. [2024-06-28 00:04:11,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17878 conditions, 2552 events. 1388/2552 cut-off events. For 101140/101158 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 16786 event pairs, 353 based on Foata normal form. 12/2518 useless extension candidates. Maximal degree in co-relation 17782. Up to 1973 conditions per place. [2024-06-28 00:04:11,765 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 170 selfloop transitions, 77 changer transitions 0/256 dead transitions. [2024-06-28 00:04:11,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 256 transitions, 4673 flow [2024-06-28 00:04:11,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:04:11,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:04:11,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-28 00:04:11,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-06-28 00:04:11,766 INFO L175 Difference]: Start difference. First operand has 217 places, 225 transitions, 3888 flow. Second operand 8 states and 166 transitions. [2024-06-28 00:04:11,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 256 transitions, 4673 flow [2024-06-28 00:04:12,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 256 transitions, 4542 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-28 00:04:12,021 INFO L231 Difference]: Finished difference. Result has 224 places, 233 transitions, 4089 flow [2024-06-28 00:04:12,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3761, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4089, PETRI_PLACES=224, PETRI_TRANSITIONS=233} [2024-06-28 00:04:12,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-28 00:04:12,022 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 233 transitions, 4089 flow [2024-06-28 00:04:12,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:12,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:12,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:12,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 00:04:12,022 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:12,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:12,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2136795831, now seen corresponding path program 7 times [2024-06-28 00:04:12,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:12,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249035106] [2024-06-28 00:04:12,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:12,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:12,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:12,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249035106] [2024-06-28 00:04:12,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249035106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:12,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:12,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:04:12,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360925125] [2024-06-28 00:04:12,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:12,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:04:12,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:12,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:04:12,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:04:12,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:12,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 233 transitions, 4089 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:12,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:12,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:12,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:12,801 INFO L124 PetriNetUnfolderBase]: 1396/2549 cut-off events. [2024-06-28 00:04:12,801 INFO L125 PetriNetUnfolderBase]: For 112893/112924 co-relation queries the response was YES. [2024-06-28 00:04:12,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18050 conditions, 2549 events. 1396/2549 cut-off events. For 112893/112924 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 16758 event pairs, 360 based on Foata normal form. 14/2488 useless extension candidates. Maximal degree in co-relation 17952. Up to 1455 conditions per place. [2024-06-28 00:04:12,834 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 161 selfloop transitions, 84 changer transitions 0/254 dead transitions. [2024-06-28 00:04:12,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 254 transitions, 4925 flow [2024-06-28 00:04:12,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:04:12,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:04:12,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-28 00:04:12,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-28 00:04:12,835 INFO L175 Difference]: Start difference. First operand has 224 places, 233 transitions, 4089 flow. Second operand 7 states and 140 transitions. [2024-06-28 00:04:12,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 254 transitions, 4925 flow [2024-06-28 00:04:13,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 254 transitions, 4781 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 00:04:13,087 INFO L231 Difference]: Finished difference. Result has 226 places, 238 transitions, 4254 flow [2024-06-28 00:04:13,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3945, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4254, PETRI_PLACES=226, PETRI_TRANSITIONS=238} [2024-06-28 00:04:13,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-28 00:04:13,087 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 238 transitions, 4254 flow [2024-06-28 00:04:13,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:13,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:13,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:13,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 00:04:13,088 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:13,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:13,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1959664311, now seen corresponding path program 8 times [2024-06-28 00:04:13,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:13,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353896970] [2024-06-28 00:04:13,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:13,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:13,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:13,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353896970] [2024-06-28 00:04:13,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353896970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:13,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:13,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:04:13,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870757475] [2024-06-28 00:04:13,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:13,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:04:13,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:13,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:04:13,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:04:13,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:13,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 238 transitions, 4254 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:13,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:13,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:13,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:13,960 INFO L124 PetriNetUnfolderBase]: 1391/2543 cut-off events. [2024-06-28 00:04:13,960 INFO L125 PetriNetUnfolderBase]: For 115220/115251 co-relation queries the response was YES. [2024-06-28 00:04:14,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18151 conditions, 2543 events. 1391/2543 cut-off events. For 115220/115251 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 16717 event pairs, 370 based on Foata normal form. 14/2482 useless extension candidates. Maximal degree in co-relation 18052. Up to 1453 conditions per place. [2024-06-28 00:04:14,044 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 164 selfloop transitions, 83 changer transitions 0/256 dead transitions. [2024-06-28 00:04:14,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 256 transitions, 5008 flow [2024-06-28 00:04:14,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:04:14,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:04:14,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-28 00:04:14,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-06-28 00:04:14,045 INFO L175 Difference]: Start difference. First operand has 226 places, 238 transitions, 4254 flow. Second operand 7 states and 141 transitions. [2024-06-28 00:04:14,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 256 transitions, 5008 flow [2024-06-28 00:04:14,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 256 transitions, 4910 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-28 00:04:14,225 INFO L231 Difference]: Finished difference. Result has 231 places, 239 transitions, 4369 flow [2024-06-28 00:04:14,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4156, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4369, PETRI_PLACES=231, PETRI_TRANSITIONS=239} [2024-06-28 00:04:14,226 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-28 00:04:14,226 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 239 transitions, 4369 flow [2024-06-28 00:04:14,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:14,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:14,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:14,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 00:04:14,227 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:14,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:14,227 INFO L85 PathProgramCache]: Analyzing trace with hash -270775604, now seen corresponding path program 6 times [2024-06-28 00:04:14,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:14,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084329050] [2024-06-28 00:04:14,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:14,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:14,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:14,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084329050] [2024-06-28 00:04:14,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084329050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:14,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:14,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:04:14,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493545061] [2024-06-28 00:04:14,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:14,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:04:14,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:14,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:04:14,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:04:14,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:14,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 239 transitions, 4369 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:14,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:14,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:14,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:15,225 INFO L124 PetriNetUnfolderBase]: 1386/2557 cut-off events. [2024-06-28 00:04:15,225 INFO L125 PetriNetUnfolderBase]: For 114294/114339 co-relation queries the response was YES. [2024-06-28 00:04:15,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18282 conditions, 2557 events. 1386/2557 cut-off events. For 114294/114339 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 16847 event pairs, 358 based on Foata normal form. 23/2532 useless extension candidates. Maximal degree in co-relation 18180. Up to 1974 conditions per place. [2024-06-28 00:04:15,257 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 182 selfloop transitions, 64 changer transitions 0/255 dead transitions. [2024-06-28 00:04:15,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 255 transitions, 4907 flow [2024-06-28 00:04:15,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:04:15,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:04:15,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-28 00:04:15,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-28 00:04:15,259 INFO L175 Difference]: Start difference. First operand has 231 places, 239 transitions, 4369 flow. Second operand 6 states and 127 transitions. [2024-06-28 00:04:15,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 255 transitions, 4907 flow [2024-06-28 00:04:15,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 255 transitions, 4654 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-28 00:04:15,540 INFO L231 Difference]: Finished difference. Result has 232 places, 239 transitions, 4255 flow [2024-06-28 00:04:15,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4116, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4255, PETRI_PLACES=232, PETRI_TRANSITIONS=239} [2024-06-28 00:04:15,541 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-28 00:04:15,541 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 239 transitions, 4255 flow [2024-06-28 00:04:15,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:15,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:15,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:15,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 00:04:15,542 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:15,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:15,542 INFO L85 PathProgramCache]: Analyzing trace with hash 539963577, now seen corresponding path program 9 times [2024-06-28 00:04:15,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:15,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582189872] [2024-06-28 00:04:15,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:15,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:15,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:15,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:15,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582189872] [2024-06-28 00:04:15,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582189872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:15,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:15,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:04:15,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755374516] [2024-06-28 00:04:15,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:15,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:04:15,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:15,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:04:15,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:04:15,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:15,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 239 transitions, 4255 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:15,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:15,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:15,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:16,361 INFO L124 PetriNetUnfolderBase]: 1381/2534 cut-off events. [2024-06-28 00:04:16,361 INFO L125 PetriNetUnfolderBase]: For 111613/111619 co-relation queries the response was YES. [2024-06-28 00:04:16,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17920 conditions, 2534 events. 1381/2534 cut-off events. For 111613/111619 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 16661 event pairs, 293 based on Foata normal form. 3/2472 useless extension candidates. Maximal degree in co-relation 17817. Up to 1948 conditions per place. [2024-06-28 00:04:16,386 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 210 selfloop transitions, 34 changer transitions 0/253 dead transitions. [2024-06-28 00:04:16,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 253 transitions, 4775 flow [2024-06-28 00:04:16,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:04:16,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:04:16,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-28 00:04:16,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-28 00:04:16,388 INFO L175 Difference]: Start difference. First operand has 232 places, 239 transitions, 4255 flow. Second operand 7 states and 135 transitions. [2024-06-28 00:04:16,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 253 transitions, 4775 flow [2024-06-28 00:04:16,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 253 transitions, 4543 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 00:04:16,611 INFO L231 Difference]: Finished difference. Result has 233 places, 239 transitions, 4096 flow [2024-06-28 00:04:16,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4023, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4096, PETRI_PLACES=233, PETRI_TRANSITIONS=239} [2024-06-28 00:04:16,612 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-28 00:04:16,612 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 239 transitions, 4096 flow [2024-06-28 00:04:16,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:16,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:16,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:16,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 00:04:16,613 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:16,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:16,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1959664497, now seen corresponding path program 9 times [2024-06-28 00:04:16,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:16,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956825847] [2024-06-28 00:04:16,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:16,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:16,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:16,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:16,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956825847] [2024-06-28 00:04:16,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956825847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:16,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:16,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:04:16,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465225060] [2024-06-28 00:04:16,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:16,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:04:16,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:16,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:04:16,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:04:16,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:16,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 239 transitions, 4096 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:16,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:16,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:16,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:17,489 INFO L124 PetriNetUnfolderBase]: 1375/2529 cut-off events. [2024-06-28 00:04:17,489 INFO L125 PetriNetUnfolderBase]: For 113135/113183 co-relation queries the response was YES. [2024-06-28 00:04:17,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17511 conditions, 2529 events. 1375/2529 cut-off events. For 113135/113183 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16727 event pairs, 437 based on Foata normal form. 24/2491 useless extension candidates. Maximal degree in co-relation 17409. Up to 1736 conditions per place. [2024-06-28 00:04:17,524 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 140 selfloop transitions, 107 changer transitions 0/256 dead transitions. [2024-06-28 00:04:17,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 256 transitions, 4766 flow [2024-06-28 00:04:17,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:04:17,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:04:17,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-28 00:04:17,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931972789115646 [2024-06-28 00:04:17,525 INFO L175 Difference]: Start difference. First operand has 233 places, 239 transitions, 4096 flow. Second operand 7 states and 145 transitions. [2024-06-28 00:04:17,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 256 transitions, 4766 flow [2024-06-28 00:04:17,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 256 transitions, 4573 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-28 00:04:17,783 INFO L231 Difference]: Finished difference. Result has 232 places, 240 transitions, 4159 flow [2024-06-28 00:04:17,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3933, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4159, PETRI_PLACES=232, PETRI_TRANSITIONS=240} [2024-06-28 00:04:17,783 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-28 00:04:17,783 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 240 transitions, 4159 flow [2024-06-28 00:04:17,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:17,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:17,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:17,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 00:04:17,784 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:17,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:17,784 INFO L85 PathProgramCache]: Analyzing trace with hash -245805028, now seen corresponding path program 1 times [2024-06-28 00:04:17,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:17,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733332228] [2024-06-28 00:04:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:17,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:18,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:18,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733332228] [2024-06-28 00:04:18,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733332228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:18,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:18,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:18,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070886477] [2024-06-28 00:04:18,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:18,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:18,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:18,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:18,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:18,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:18,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 240 transitions, 4159 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:18,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:18,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:18,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:18,804 INFO L124 PetriNetUnfolderBase]: 1359/2514 cut-off events. [2024-06-28 00:04:18,804 INFO L125 PetriNetUnfolderBase]: For 110343/110361 co-relation queries the response was YES. [2024-06-28 00:04:18,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17204 conditions, 2514 events. 1359/2514 cut-off events. For 110343/110361 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 16503 event pairs, 346 based on Foata normal form. 18/2497 useless extension candidates. Maximal degree in co-relation 17102. Up to 1918 conditions per place. [2024-06-28 00:04:18,837 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 228 selfloop transitions, 33 changer transitions 0/270 dead transitions. [2024-06-28 00:04:18,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 270 transitions, 4771 flow [2024-06-28 00:04:18,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:04:18,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:04:18,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-28 00:04:18,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-06-28 00:04:18,839 INFO L175 Difference]: Start difference. First operand has 232 places, 240 transitions, 4159 flow. Second operand 7 states and 153 transitions. [2024-06-28 00:04:18,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 270 transitions, 4771 flow [2024-06-28 00:04:19,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 270 transitions, 4571 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 00:04:19,092 INFO L231 Difference]: Finished difference. Result has 235 places, 240 transitions, 4033 flow [2024-06-28 00:04:19,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3959, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4033, PETRI_PLACES=235, PETRI_TRANSITIONS=240} [2024-06-28 00:04:19,093 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-28 00:04:19,093 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 240 transitions, 4033 flow [2024-06-28 00:04:19,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:19,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:19,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:19,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 00:04:19,094 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:19,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:19,094 INFO L85 PathProgramCache]: Analyzing trace with hash 967691496, now seen corresponding path program 2 times [2024-06-28 00:04:19,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:19,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561136011] [2024-06-28 00:04:19,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:19,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:19,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:19,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561136011] [2024-06-28 00:04:19,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561136011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:19,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:19,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:19,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845457319] [2024-06-28 00:04:19,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:19,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:19,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:19,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:19,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:19,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:19,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 240 transitions, 4033 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:19,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:19,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:19,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:20,099 INFO L124 PetriNetUnfolderBase]: 1494/2767 cut-off events. [2024-06-28 00:04:20,099 INFO L125 PetriNetUnfolderBase]: For 128840/128858 co-relation queries the response was YES. [2024-06-28 00:04:20,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18663 conditions, 2767 events. 1494/2767 cut-off events. For 128840/128858 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 18772 event pairs, 306 based on Foata normal form. 20/2746 useless extension candidates. Maximal degree in co-relation 18560. Up to 1433 conditions per place. [2024-06-28 00:04:20,129 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 180 selfloop transitions, 97 changer transitions 0/286 dead transitions. [2024-06-28 00:04:20,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 286 transitions, 5119 flow [2024-06-28 00:04:20,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:04:20,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:04:20,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-28 00:04:20,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374149659863946 [2024-06-28 00:04:20,131 INFO L175 Difference]: Start difference. First operand has 235 places, 240 transitions, 4033 flow. Second operand 7 states and 158 transitions. [2024-06-28 00:04:20,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 286 transitions, 5119 flow [2024-06-28 00:04:20,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 286 transitions, 5053 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 00:04:20,379 INFO L231 Difference]: Finished difference. Result has 237 places, 247 transitions, 4287 flow [2024-06-28 00:04:20,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3967, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4287, PETRI_PLACES=237, PETRI_TRANSITIONS=247} [2024-06-28 00:04:20,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-28 00:04:20,382 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 247 transitions, 4287 flow [2024-06-28 00:04:20,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:20,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:20,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:20,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 00:04:20,382 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:20,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:20,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1653139024, now seen corresponding path program 3 times [2024-06-28 00:04:20,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:20,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193198520] [2024-06-28 00:04:20,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:20,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:20,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:20,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193198520] [2024-06-28 00:04:20,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193198520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:20,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:20,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:20,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072210018] [2024-06-28 00:04:20,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:20,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:20,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:20,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:20,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:20,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:20,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 247 transitions, 4287 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:20,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:20,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:20,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:21,362 INFO L124 PetriNetUnfolderBase]: 1570/2927 cut-off events. [2024-06-28 00:04:21,363 INFO L125 PetriNetUnfolderBase]: For 136161/136179 co-relation queries the response was YES. [2024-06-28 00:04:21,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19701 conditions, 2927 events. 1570/2927 cut-off events. For 136161/136179 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 20197 event pairs, 361 based on Foata normal form. 20/2898 useless extension candidates. Maximal degree in co-relation 19596. Up to 1461 conditions per place. [2024-06-28 00:04:21,399 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 190 selfloop transitions, 89 changer transitions 0/288 dead transitions. [2024-06-28 00:04:21,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 288 transitions, 5427 flow [2024-06-28 00:04:21,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:04:21,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:04:21,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-28 00:04:21,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306122448979592 [2024-06-28 00:04:21,400 INFO L175 Difference]: Start difference. First operand has 237 places, 247 transitions, 4287 flow. Second operand 7 states and 156 transitions. [2024-06-28 00:04:21,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 288 transitions, 5427 flow [2024-06-28 00:04:21,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 288 transitions, 5296 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 00:04:21,728 INFO L231 Difference]: Finished difference. Result has 241 places, 249 transitions, 4365 flow [2024-06-28 00:04:21,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4158, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4365, PETRI_PLACES=241, PETRI_TRANSITIONS=249} [2024-06-28 00:04:21,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-28 00:04:21,729 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 249 transitions, 4365 flow [2024-06-28 00:04:21,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:21,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:21,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:21,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 00:04:21,729 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:21,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:21,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1388427880, now seen corresponding path program 4 times [2024-06-28 00:04:21,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:21,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98427620] [2024-06-28 00:04:21,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:21,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:22,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:22,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98427620] [2024-06-28 00:04:22,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98427620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:22,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:22,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:22,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258012648] [2024-06-28 00:04:22,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:22,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:22,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:22,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:22,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:22,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:22,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 249 transitions, 4365 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:22,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:22,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:22,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:22,818 INFO L124 PetriNetUnfolderBase]: 1549/2898 cut-off events. [2024-06-28 00:04:22,818 INFO L125 PetriNetUnfolderBase]: For 132734/132782 co-relation queries the response was YES. [2024-06-28 00:04:22,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19160 conditions, 2898 events. 1549/2898 cut-off events. For 132734/132782 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20065 event pairs, 378 based on Foata normal form. 30/2876 useless extension candidates. Maximal degree in co-relation 19054. Up to 1455 conditions per place. [2024-06-28 00:04:22,848 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 175 selfloop transitions, 95 changer transitions 0/279 dead transitions. [2024-06-28 00:04:22,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 279 transitions, 5291 flow [2024-06-28 00:04:22,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:04:22,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:04:22,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-28 00:04:22,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-28 00:04:22,849 INFO L175 Difference]: Start difference. First operand has 241 places, 249 transitions, 4365 flow. Second operand 7 states and 150 transitions. [2024-06-28 00:04:22,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 279 transitions, 5291 flow [2024-06-28 00:04:23,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 279 transitions, 5157 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 00:04:23,129 INFO L231 Difference]: Finished difference. Result has 244 places, 249 transitions, 4436 flow [2024-06-28 00:04:23,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4231, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4436, PETRI_PLACES=244, PETRI_TRANSITIONS=249} [2024-06-28 00:04:23,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-28 00:04:23,129 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 249 transitions, 4436 flow [2024-06-28 00:04:23,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:23,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:23,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:23,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 00:04:23,130 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:23,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:23,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1261547818, now seen corresponding path program 1 times [2024-06-28 00:04:23,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:23,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273276637] [2024-06-28 00:04:23,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:23,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:23,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:23,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273276637] [2024-06-28 00:04:23,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273276637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:23,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:23,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:23,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035639714] [2024-06-28 00:04:23,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:23,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:23,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:23,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:23,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:23,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:23,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 249 transitions, 4436 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:23,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:23,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:23,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:24,095 INFO L124 PetriNetUnfolderBase]: 1626/2973 cut-off events. [2024-06-28 00:04:24,095 INFO L125 PetriNetUnfolderBase]: For 137536/137536 co-relation queries the response was YES. [2024-06-28 00:04:24,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20550 conditions, 2973 events. 1626/2973 cut-off events. For 137536/137536 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 20251 event pairs, 292 based on Foata normal form. 2/2921 useless extension candidates. Maximal degree in co-relation 20444. Up to 1949 conditions per place. [2024-06-28 00:04:24,131 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 201 selfloop transitions, 86 changer transitions 0/296 dead transitions. [2024-06-28 00:04:24,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 296 transitions, 5586 flow [2024-06-28 00:04:24,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:04:24,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:04:24,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-28 00:04:24,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-28 00:04:24,132 INFO L175 Difference]: Start difference. First operand has 244 places, 249 transitions, 4436 flow. Second operand 7 states and 163 transitions. [2024-06-28 00:04:24,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 296 transitions, 5586 flow [2024-06-28 00:04:24,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 296 transitions, 5321 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 00:04:24,436 INFO L231 Difference]: Finished difference. Result has 246 places, 261 transitions, 4664 flow [2024-06-28 00:04:24,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4181, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4664, PETRI_PLACES=246, PETRI_TRANSITIONS=261} [2024-06-28 00:04:24,436 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-28 00:04:24,436 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 261 transitions, 4664 flow [2024-06-28 00:04:24,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:24,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:24,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:24,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 00:04:24,437 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:24,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:24,437 INFO L85 PathProgramCache]: Analyzing trace with hash -915273745, now seen corresponding path program 1 times [2024-06-28 00:04:24,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:24,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105809084] [2024-06-28 00:04:24,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:24,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:24,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:24,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105809084] [2024-06-28 00:04:24,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105809084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:24,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:24,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:24,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845800421] [2024-06-28 00:04:24,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:24,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:24,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:24,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:24,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:24,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:24,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 261 transitions, 4664 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:24,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:24,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:24,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:25,484 INFO L124 PetriNetUnfolderBase]: 1638/3031 cut-off events. [2024-06-28 00:04:25,484 INFO L125 PetriNetUnfolderBase]: For 144513/144513 co-relation queries the response was YES. [2024-06-28 00:04:25,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20944 conditions, 3031 events. 1638/3031 cut-off events. For 144513/144513 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20901 event pairs, 329 based on Foata normal form. 4/2975 useless extension candidates. Maximal degree in co-relation 20836. Up to 2179 conditions per place. [2024-06-28 00:04:25,520 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 228 selfloop transitions, 51 changer transitions 0/288 dead transitions. [2024-06-28 00:04:25,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 288 transitions, 5426 flow [2024-06-28 00:04:25,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:04:25,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:04:25,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-28 00:04:25,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5515873015873016 [2024-06-28 00:04:25,521 INFO L175 Difference]: Start difference. First operand has 246 places, 261 transitions, 4664 flow. Second operand 6 states and 139 transitions. [2024-06-28 00:04:25,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 288 transitions, 5426 flow [2024-06-28 00:04:25,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 288 transitions, 5321 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-28 00:04:25,888 INFO L231 Difference]: Finished difference. Result has 249 places, 262 transitions, 4709 flow [2024-06-28 00:04:25,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4560, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4709, PETRI_PLACES=249, PETRI_TRANSITIONS=262} [2024-06-28 00:04:25,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-28 00:04:25,889 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 262 transitions, 4709 flow [2024-06-28 00:04:25,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:25,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:25,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:25,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 00:04:25,889 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:25,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:25,890 INFO L85 PathProgramCache]: Analyzing trace with hash -915273962, now seen corresponding path program 2 times [2024-06-28 00:04:25,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:25,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829770261] [2024-06-28 00:04:25,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:25,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:26,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:26,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829770261] [2024-06-28 00:04:26,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829770261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:26,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:26,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:26,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601444737] [2024-06-28 00:04:26,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:26,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:26,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:26,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:26,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:26,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:26,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 262 transitions, 4709 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:26,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:26,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:26,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:26,830 INFO L124 PetriNetUnfolderBase]: 1646/3009 cut-off events. [2024-06-28 00:04:26,830 INFO L125 PetriNetUnfolderBase]: For 146515/146515 co-relation queries the response was YES. [2024-06-28 00:04:26,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21250 conditions, 3009 events. 1646/3009 cut-off events. For 146515/146515 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 20501 event pairs, 308 based on Foata normal form. 2/2951 useless extension candidates. Maximal degree in co-relation 21140. Up to 1953 conditions per place. [2024-06-28 00:04:26,868 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 201 selfloop transitions, 83 changer transitions 0/293 dead transitions. [2024-06-28 00:04:26,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 293 transitions, 5566 flow [2024-06-28 00:04:26,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:04:26,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:04:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-28 00:04:26,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374149659863946 [2024-06-28 00:04:26,869 INFO L175 Difference]: Start difference. First operand has 249 places, 262 transitions, 4709 flow. Second operand 7 states and 158 transitions. [2024-06-28 00:04:26,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 293 transitions, 5566 flow [2024-06-28 00:04:27,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 293 transitions, 5505 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 00:04:27,309 INFO L231 Difference]: Finished difference. Result has 253 places, 265 transitions, 4903 flow [2024-06-28 00:04:27,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4648, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4903, PETRI_PLACES=253, PETRI_TRANSITIONS=265} [2024-06-28 00:04:27,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-28 00:04:27,309 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 265 transitions, 4903 flow [2024-06-28 00:04:27,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:27,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:27,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:27,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 00:04:27,310 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:27,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:27,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1588022999, now seen corresponding path program 2 times [2024-06-28 00:04:27,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:27,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068110283] [2024-06-28 00:04:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:27,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:27,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:27,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068110283] [2024-06-28 00:04:27,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068110283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:27,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:27,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:27,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516723268] [2024-06-28 00:04:27,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:27,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:27,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:27,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:27,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:27,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:27,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 265 transitions, 4903 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:27,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:27,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:27,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:28,395 INFO L124 PetriNetUnfolderBase]: 1666/3073 cut-off events. [2024-06-28 00:04:28,395 INFO L125 PetriNetUnfolderBase]: For 157757/157763 co-relation queries the response was YES. [2024-06-28 00:04:28,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21891 conditions, 3073 events. 1666/3073 cut-off events. For 157757/157763 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 21217 event pairs, 298 based on Foata normal form. 5/3008 useless extension candidates. Maximal degree in co-relation 21780. Up to 2207 conditions per place. [2024-06-28 00:04:28,467 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 214 selfloop transitions, 69 changer transitions 0/292 dead transitions. [2024-06-28 00:04:28,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 292 transitions, 5729 flow [2024-06-28 00:04:28,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:04:28,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:04:28,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-28 00:04:28,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-28 00:04:28,469 INFO L175 Difference]: Start difference. First operand has 253 places, 265 transitions, 4903 flow. Second operand 8 states and 165 transitions. [2024-06-28 00:04:28,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 292 transitions, 5729 flow [2024-06-28 00:04:28,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 292 transitions, 5592 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-28 00:04:28,975 INFO L231 Difference]: Finished difference. Result has 257 places, 268 transitions, 5033 flow [2024-06-28 00:04:28,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4767, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5033, PETRI_PLACES=257, PETRI_TRANSITIONS=268} [2024-06-28 00:04:28,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-28 00:04:28,976 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 268 transitions, 5033 flow [2024-06-28 00:04:28,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:28,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:28,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:28,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 00:04:28,976 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:28,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:28,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1657741440, now seen corresponding path program 3 times [2024-06-28 00:04:28,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:28,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765453919] [2024-06-28 00:04:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:28,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:29,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:29,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765453919] [2024-06-28 00:04:29,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765453919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:29,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:29,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:29,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887990778] [2024-06-28 00:04:29,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:29,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:29,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:29,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:29,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:29,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:29,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 268 transitions, 5033 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:29,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:29,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:29,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:29,905 INFO L124 PetriNetUnfolderBase]: 1661/3032 cut-off events. [2024-06-28 00:04:29,905 INFO L125 PetriNetUnfolderBase]: For 155213/155213 co-relation queries the response was YES. [2024-06-28 00:04:29,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21850 conditions, 3032 events. 1661/3032 cut-off events. For 155213/155213 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20685 event pairs, 293 based on Foata normal form. 2/2978 useless extension candidates. Maximal degree in co-relation 21738. Up to 1955 conditions per place. [2024-06-28 00:04:29,938 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 192 selfloop transitions, 100 changer transitions 0/301 dead transitions. [2024-06-28 00:04:29,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 301 transitions, 5869 flow [2024-06-28 00:04:29,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:04:29,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:04:29,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-28 00:04:29,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-06-28 00:04:29,939 INFO L175 Difference]: Start difference. First operand has 257 places, 268 transitions, 5033 flow. Second operand 9 states and 192 transitions. [2024-06-28 00:04:29,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 301 transitions, 5869 flow [2024-06-28 00:04:30,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 301 transitions, 5729 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 00:04:30,373 INFO L231 Difference]: Finished difference. Result has 260 places, 270 transitions, 5173 flow [2024-06-28 00:04:30,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4893, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5173, PETRI_PLACES=260, PETRI_TRANSITIONS=270} [2024-06-28 00:04:30,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-28 00:04:30,374 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 270 transitions, 5173 flow [2024-06-28 00:04:30,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:30,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:30,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:30,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 00:04:30,374 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:30,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:30,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1445958903, now seen corresponding path program 3 times [2024-06-28 00:04:30,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:30,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452969268] [2024-06-28 00:04:30,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:30,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:30,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:30,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452969268] [2024-06-28 00:04:30,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452969268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:30,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:30,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:30,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851902970] [2024-06-28 00:04:30,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:30,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:30,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:30,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:30,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:30,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:30,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 270 transitions, 5173 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:30,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:30,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:30,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:31,584 INFO L124 PetriNetUnfolderBase]: 1653/3062 cut-off events. [2024-06-28 00:04:31,584 INFO L125 PetriNetUnfolderBase]: For 157940/157940 co-relation queries the response was YES. [2024-06-28 00:04:31,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21825 conditions, 3062 events. 1653/3062 cut-off events. For 157940/157940 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 21094 event pairs, 311 based on Foata normal form. 4/3008 useless extension candidates. Maximal degree in co-relation 21712. Up to 2196 conditions per place. [2024-06-28 00:04:31,621 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 230 selfloop transitions, 70 changer transitions 0/309 dead transitions. [2024-06-28 00:04:31,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 309 transitions, 5869 flow [2024-06-28 00:04:31,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:04:31,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:04:31,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-28 00:04:31,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-28 00:04:31,622 INFO L175 Difference]: Start difference. First operand has 260 places, 270 transitions, 5173 flow. Second operand 11 states and 224 transitions. [2024-06-28 00:04:31,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 309 transitions, 5869 flow [2024-06-28 00:04:32,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 309 transitions, 5619 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-28 00:04:32,066 INFO L231 Difference]: Finished difference. Result has 264 places, 270 transitions, 5089 flow [2024-06-28 00:04:32,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4923, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5089, PETRI_PLACES=264, PETRI_TRANSITIONS=270} [2024-06-28 00:04:32,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-28 00:04:32,067 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 270 transitions, 5089 flow [2024-06-28 00:04:32,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:32,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:32,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:32,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 00:04:32,067 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:32,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:32,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1471575872, now seen corresponding path program 4 times [2024-06-28 00:04:32,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:32,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4266985] [2024-06-28 00:04:32,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:32,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:32,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:32,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4266985] [2024-06-28 00:04:32,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4266985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:32,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:32,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:32,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609162548] [2024-06-28 00:04:32,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:32,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:32,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:32,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:32,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:32,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:32,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 270 transitions, 5089 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:32,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:32,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:32,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:33,163 INFO L124 PetriNetUnfolderBase]: 1727/3132 cut-off events. [2024-06-28 00:04:33,163 INFO L125 PetriNetUnfolderBase]: For 170548/170548 co-relation queries the response was YES. [2024-06-28 00:04:33,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22970 conditions, 3132 events. 1727/3132 cut-off events. For 170548/170548 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 21373 event pairs, 306 based on Foata normal form. 2/3081 useless extension candidates. Maximal degree in co-relation 22856. Up to 1704 conditions per place. [2024-06-28 00:04:33,209 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 225 selfloop transitions, 90 changer transitions 0/324 dead transitions. [2024-06-28 00:04:33,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 324 transitions, 6352 flow [2024-06-28 00:04:33,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:04:33,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:04:33,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-28 00:04:33,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423280423280423 [2024-06-28 00:04:33,213 INFO L175 Difference]: Start difference. First operand has 264 places, 270 transitions, 5089 flow. Second operand 9 states and 205 transitions. [2024-06-28 00:04:33,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 324 transitions, 6352 flow [2024-06-28 00:04:33,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 324 transitions, 6145 flow, removed 15 selfloop flow, removed 13 redundant places. [2024-06-28 00:04:33,719 INFO L231 Difference]: Finished difference. Result has 261 places, 275 transitions, 5164 flow [2024-06-28 00:04:33,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4888, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5164, PETRI_PLACES=261, PETRI_TRANSITIONS=275} [2024-06-28 00:04:33,720 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-28 00:04:33,720 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 275 transitions, 5164 flow [2024-06-28 00:04:33,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:33,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:33,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:33,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 00:04:33,720 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:33,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:33,720 INFO L85 PathProgramCache]: Analyzing trace with hash 665640966, now seen corresponding path program 5 times [2024-06-28 00:04:33,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:33,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615077619] [2024-06-28 00:04:33,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:33,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:33,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:33,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615077619] [2024-06-28 00:04:33,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615077619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:33,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:33,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:33,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412565155] [2024-06-28 00:04:33,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:33,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:33,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:33,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:33,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:33,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:33,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 275 transitions, 5164 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:33,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:33,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:33,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:34,685 INFO L124 PetriNetUnfolderBase]: 1735/3160 cut-off events. [2024-06-28 00:04:34,686 INFO L125 PetriNetUnfolderBase]: For 171745/171745 co-relation queries the response was YES. [2024-06-28 00:04:34,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23280 conditions, 3160 events. 1735/3160 cut-off events. For 171745/171745 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 21667 event pairs, 266 based on Foata normal form. 2/3110 useless extension candidates. Maximal degree in co-relation 23168. Up to 1708 conditions per place. [2024-06-28 00:04:34,731 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 216 selfloop transitions, 106 changer transitions 0/331 dead transitions. [2024-06-28 00:04:34,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 331 transitions, 6438 flow [2024-06-28 00:04:34,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:04:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:04:34,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-28 00:04:34,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-28 00:04:34,732 INFO L175 Difference]: Start difference. First operand has 261 places, 275 transitions, 5164 flow. Second operand 10 states and 224 transitions. [2024-06-28 00:04:34,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 331 transitions, 6438 flow [2024-06-28 00:04:35,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 331 transitions, 6356 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-28 00:04:35,160 INFO L231 Difference]: Finished difference. Result has 269 places, 278 transitions, 5382 flow [2024-06-28 00:04:35,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5084, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5382, PETRI_PLACES=269, PETRI_TRANSITIONS=278} [2024-06-28 00:04:35,161 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-28 00:04:35,161 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 278 transitions, 5382 flow [2024-06-28 00:04:35,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:35,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:35,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:35,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 00:04:35,162 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:35,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:35,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1475859979, now seen corresponding path program 1 times [2024-06-28 00:04:35,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:35,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368483165] [2024-06-28 00:04:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:35,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:35,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:35,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368483165] [2024-06-28 00:04:35,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368483165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:35,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:35,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:35,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402646750] [2024-06-28 00:04:35,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:35,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:35,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:35,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:35,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:35,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:35,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 278 transitions, 5382 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:35,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:35,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:35,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:36,285 INFO L124 PetriNetUnfolderBase]: 1725/3174 cut-off events. [2024-06-28 00:04:36,286 INFO L125 PetriNetUnfolderBase]: For 180193/180199 co-relation queries the response was YES. [2024-06-28 00:04:36,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23543 conditions, 3174 events. 1725/3174 cut-off events. For 180193/180199 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 21999 event pairs, 406 based on Foata normal form. 10/3115 useless extension candidates. Maximal degree in co-relation 23428. Up to 2432 conditions per place. [2024-06-28 00:04:36,322 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 221 selfloop transitions, 93 changer transitions 0/323 dead transitions. [2024-06-28 00:04:36,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 323 transitions, 6252 flow [2024-06-28 00:04:36,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:04:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:04:36,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-28 00:04:36,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2024-06-28 00:04:36,323 INFO L175 Difference]: Start difference. First operand has 269 places, 278 transitions, 5382 flow. Second operand 10 states and 219 transitions. [2024-06-28 00:04:36,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 323 transitions, 6252 flow [2024-06-28 00:04:36,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 323 transitions, 6057 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-28 00:04:36,821 INFO L231 Difference]: Finished difference. Result has 272 places, 278 transitions, 5384 flow [2024-06-28 00:04:36,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5187, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5384, PETRI_PLACES=272, PETRI_TRANSITIONS=278} [2024-06-28 00:04:36,821 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-28 00:04:36,821 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 278 transitions, 5384 flow [2024-06-28 00:04:36,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:36,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:36,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:36,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 00:04:36,822 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:36,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:36,823 INFO L85 PathProgramCache]: Analyzing trace with hash 660428533, now seen corresponding path program 4 times [2024-06-28 00:04:36,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:36,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644612313] [2024-06-28 00:04:36,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:36,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:37,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:37,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644612313] [2024-06-28 00:04:37,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644612313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:37,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:37,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:37,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645669024] [2024-06-28 00:04:37,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:37,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:37,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:37,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:37,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:37,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:37,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 278 transitions, 5384 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:37,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:37,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:37,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:38,034 INFO L124 PetriNetUnfolderBase]: 1737/3206 cut-off events. [2024-06-28 00:04:38,035 INFO L125 PetriNetUnfolderBase]: For 184739/184745 co-relation queries the response was YES. [2024-06-28 00:04:38,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23616 conditions, 3206 events. 1737/3206 cut-off events. For 184739/184745 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 22332 event pairs, 328 based on Foata normal form. 5/3139 useless extension candidates. Maximal degree in co-relation 23500. Up to 2198 conditions per place. [2024-06-28 00:04:38,066 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 232 selfloop transitions, 71 changer transitions 0/312 dead transitions. [2024-06-28 00:04:38,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 312 transitions, 6207 flow [2024-06-28 00:04:38,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:04:38,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:04:38,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-28 00:04:38,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2024-06-28 00:04:38,067 INFO L175 Difference]: Start difference. First operand has 272 places, 278 transitions, 5384 flow. Second operand 10 states and 199 transitions. [2024-06-28 00:04:38,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 312 transitions, 6207 flow [2024-06-28 00:04:38,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 312 transitions, 6006 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-28 00:04:38,604 INFO L231 Difference]: Finished difference. Result has 273 places, 279 transitions, 5352 flow [2024-06-28 00:04:38,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5185, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5352, PETRI_PLACES=273, PETRI_TRANSITIONS=279} [2024-06-28 00:04:38,604 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-28 00:04:38,605 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 279 transitions, 5352 flow [2024-06-28 00:04:38,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:38,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:38,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:38,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 00:04:38,605 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:38,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:38,605 INFO L85 PathProgramCache]: Analyzing trace with hash -130950584, now seen corresponding path program 6 times [2024-06-28 00:04:38,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:38,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164401745] [2024-06-28 00:04:38,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:38,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:38,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:38,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164401745] [2024-06-28 00:04:38,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164401745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:38,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:38,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:38,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530472488] [2024-06-28 00:04:38,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:38,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:38,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:38,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:38,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:38,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:38,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 279 transitions, 5352 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:38,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:38,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:38,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:39,615 INFO L124 PetriNetUnfolderBase]: 1745/3206 cut-off events. [2024-06-28 00:04:39,616 INFO L125 PetriNetUnfolderBase]: For 183871/183871 co-relation queries the response was YES. [2024-06-28 00:04:39,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23712 conditions, 3206 events. 1745/3206 cut-off events. For 183871/183871 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 22247 event pairs, 222 based on Foata normal form. 2/3156 useless extension candidates. Maximal degree in co-relation 23596. Up to 1708 conditions per place. [2024-06-28 00:04:39,653 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 210 selfloop transitions, 108 changer transitions 0/327 dead transitions. [2024-06-28 00:04:39,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 327 transitions, 6445 flow [2024-06-28 00:04:39,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:04:39,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:04:39,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-28 00:04:39,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2024-06-28 00:04:39,655 INFO L175 Difference]: Start difference. First operand has 273 places, 279 transitions, 5352 flow. Second operand 10 states and 219 transitions. [2024-06-28 00:04:39,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 327 transitions, 6445 flow [2024-06-28 00:04:40,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 327 transitions, 6276 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-28 00:04:40,161 INFO L231 Difference]: Finished difference. Result has 275 places, 281 transitions, 5464 flow [2024-06-28 00:04:40,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5183, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5464, PETRI_PLACES=275, PETRI_TRANSITIONS=281} [2024-06-28 00:04:40,161 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-28 00:04:40,161 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 281 transitions, 5464 flow [2024-06-28 00:04:40,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:40,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:40,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:40,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 00:04:40,162 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:40,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:40,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1873003568, now seen corresponding path program 7 times [2024-06-28 00:04:40,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:40,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017801465] [2024-06-28 00:04:40,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:40,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:40,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:40,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:40,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017801465] [2024-06-28 00:04:40,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017801465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:40,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:40,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:40,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295604105] [2024-06-28 00:04:40,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:40,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:40,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:40,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:40,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:40,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:40,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 281 transitions, 5464 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:40,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:40,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:40,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:41,145 INFO L124 PetriNetUnfolderBase]: 1753/3180 cut-off events. [2024-06-28 00:04:41,145 INFO L125 PetriNetUnfolderBase]: For 189778/189778 co-relation queries the response was YES. [2024-06-28 00:04:41,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24065 conditions, 3180 events. 1753/3180 cut-off events. For 189778/189778 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 21759 event pairs, 267 based on Foata normal form. 2/3123 useless extension candidates. Maximal degree in co-relation 23948. Up to 1712 conditions per place. [2024-06-28 00:04:41,179 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 221 selfloop transitions, 94 changer transitions 0/324 dead transitions. [2024-06-28 00:04:41,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 324 transitions, 6548 flow [2024-06-28 00:04:41,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:04:41,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:04:41,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-28 00:04:41,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-28 00:04:41,184 INFO L175 Difference]: Start difference. First operand has 275 places, 281 transitions, 5464 flow. Second operand 9 states and 199 transitions. [2024-06-28 00:04:41,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 324 transitions, 6548 flow [2024-06-28 00:04:41,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 324 transitions, 6355 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-28 00:04:41,655 INFO L231 Difference]: Finished difference. Result has 277 places, 283 transitions, 5528 flow [2024-06-28 00:04:41,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5272, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5528, PETRI_PLACES=277, PETRI_TRANSITIONS=283} [2024-06-28 00:04:41,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-28 00:04:41,656 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 283 transitions, 5528 flow [2024-06-28 00:04:41,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:41,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:41,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:41,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 00:04:41,656 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:41,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:41,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1626037781, now seen corresponding path program 5 times [2024-06-28 00:04:41,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:41,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104829252] [2024-06-28 00:04:41,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:41,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:41,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:41,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104829252] [2024-06-28 00:04:41,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104829252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:41,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:41,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:41,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099726117] [2024-06-28 00:04:41,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:41,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:41,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:41,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:41,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:41,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:41,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 283 transitions, 5528 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:41,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:41,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:41,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:42,732 INFO L124 PetriNetUnfolderBase]: 1765/3268 cut-off events. [2024-06-28 00:04:42,732 INFO L125 PetriNetUnfolderBase]: For 201695/201695 co-relation queries the response was YES. [2024-06-28 00:04:42,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24410 conditions, 3268 events. 1765/3268 cut-off events. For 201695/201695 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 22957 event pairs, 289 based on Foata normal form. 4/3202 useless extension candidates. Maximal degree in co-relation 24292. Up to 2230 conditions per place. [2024-06-28 00:04:42,771 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 245 selfloop transitions, 64 changer transitions 0/318 dead transitions. [2024-06-28 00:04:42,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 318 transitions, 6376 flow [2024-06-28 00:04:42,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:04:42,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:04:42,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-28 00:04:42,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-28 00:04:42,772 INFO L175 Difference]: Start difference. First operand has 277 places, 283 transitions, 5528 flow. Second operand 8 states and 176 transitions. [2024-06-28 00:04:42,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 318 transitions, 6376 flow [2024-06-28 00:04:43,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 318 transitions, 6243 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-28 00:04:43,283 INFO L231 Difference]: Finished difference. Result has 280 places, 284 transitions, 5553 flow [2024-06-28 00:04:43,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5395, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5553, PETRI_PLACES=280, PETRI_TRANSITIONS=284} [2024-06-28 00:04:43,284 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-28 00:04:43,284 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 284 transitions, 5553 flow [2024-06-28 00:04:43,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:43,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:43,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:43,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 00:04:43,284 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:43,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:43,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1626037998, now seen corresponding path program 8 times [2024-06-28 00:04:43,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:43,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624826516] [2024-06-28 00:04:43,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:43,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:43,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:43,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624826516] [2024-06-28 00:04:43,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624826516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:43,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:43,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:43,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628882965] [2024-06-28 00:04:43,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:43,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:43,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:43,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:43,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:43,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:43,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 284 transitions, 5553 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:43,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:43,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:43,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:44,225 INFO L124 PetriNetUnfolderBase]: 1786/3261 cut-off events. [2024-06-28 00:04:44,225 INFO L125 PetriNetUnfolderBase]: For 207077/207077 co-relation queries the response was YES. [2024-06-28 00:04:44,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24903 conditions, 3261 events. 1786/3261 cut-off events. For 207077/207077 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 22603 event pairs, 263 based on Foata normal form. 2/3200 useless extension candidates. Maximal degree in co-relation 24784. Up to 1722 conditions per place. [2024-06-28 00:04:44,265 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 211 selfloop transitions, 104 changer transitions 0/324 dead transitions. [2024-06-28 00:04:44,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 324 transitions, 6698 flow [2024-06-28 00:04:44,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:04:44,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:04:44,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-28 00:04:44,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-28 00:04:44,266 INFO L175 Difference]: Start difference. First operand has 280 places, 284 transitions, 5553 flow. Second operand 9 states and 195 transitions. [2024-06-28 00:04:44,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 324 transitions, 6698 flow [2024-06-28 00:04:44,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 324 transitions, 6530 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 00:04:44,849 INFO L231 Difference]: Finished difference. Result has 284 places, 288 transitions, 5741 flow [2024-06-28 00:04:44,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5385, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5741, PETRI_PLACES=284, PETRI_TRANSITIONS=288} [2024-06-28 00:04:44,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-28 00:04:44,849 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 288 transitions, 5741 flow [2024-06-28 00:04:44,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:44,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:44,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:44,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 00:04:44,850 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:44,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:44,850 INFO L85 PathProgramCache]: Analyzing trace with hash 670617799, now seen corresponding path program 2 times [2024-06-28 00:04:44,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:44,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053499644] [2024-06-28 00:04:44,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:44,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:45,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:45,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053499644] [2024-06-28 00:04:45,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053499644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:45,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:45,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:45,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146528468] [2024-06-28 00:04:45,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:45,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:45,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:45,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:45,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:45,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:45,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 288 transitions, 5741 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:45,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:45,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:45,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:46,075 INFO L124 PetriNetUnfolderBase]: 1776/3271 cut-off events. [2024-06-28 00:04:46,075 INFO L125 PetriNetUnfolderBase]: For 211983/211989 co-relation queries the response was YES. [2024-06-28 00:04:46,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24929 conditions, 3271 events. 1776/3271 cut-off events. For 211983/211989 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 22802 event pairs, 419 based on Foata normal form. 10/3206 useless extension candidates. Maximal degree in co-relation 24808. Up to 2519 conditions per place. [2024-06-28 00:04:46,127 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 228 selfloop transitions, 93 changer transitions 0/330 dead transitions. [2024-06-28 00:04:46,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 330 transitions, 6625 flow [2024-06-28 00:04:46,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:04:46,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:04:46,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 233 transitions. [2024-06-28 00:04:46,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043290043290043 [2024-06-28 00:04:46,128 INFO L175 Difference]: Start difference. First operand has 284 places, 288 transitions, 5741 flow. Second operand 11 states and 233 transitions. [2024-06-28 00:04:46,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 330 transitions, 6625 flow [2024-06-28 00:04:46,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 330 transitions, 6445 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-28 00:04:46,738 INFO L231 Difference]: Finished difference. Result has 290 places, 288 transitions, 5764 flow [2024-06-28 00:04:46,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5561, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5764, PETRI_PLACES=290, PETRI_TRANSITIONS=288} [2024-06-28 00:04:46,739 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-28 00:04:46,739 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 288 transitions, 5764 flow [2024-06-28 00:04:46,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:46,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:46,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:46,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 00:04:46,739 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:46,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:46,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1626032418, now seen corresponding path program 9 times [2024-06-28 00:04:46,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:46,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878534656] [2024-06-28 00:04:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:46,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:46,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:46,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:46,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878534656] [2024-06-28 00:04:46,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878534656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:46,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:46,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:46,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297271234] [2024-06-28 00:04:46,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:46,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:46,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:46,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:46,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:46,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:46,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 288 transitions, 5764 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:46,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:46,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:46,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:47,721 INFO L124 PetriNetUnfolderBase]: 1771/3256 cut-off events. [2024-06-28 00:04:47,722 INFO L125 PetriNetUnfolderBase]: For 208689/208689 co-relation queries the response was YES. [2024-06-28 00:04:47,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24748 conditions, 3256 events. 1771/3256 cut-off events. For 208689/208689 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22634 event pairs, 242 based on Foata normal form. 2/3198 useless extension candidates. Maximal degree in co-relation 24626. Up to 1716 conditions per place. [2024-06-28 00:04:47,766 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 208 selfloop transitions, 106 changer transitions 0/323 dead transitions. [2024-06-28 00:04:47,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 323 transitions, 6662 flow [2024-06-28 00:04:47,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:04:47,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:04:47,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-28 00:04:47,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-28 00:04:47,767 INFO L175 Difference]: Start difference. First operand has 290 places, 288 transitions, 5764 flow. Second operand 9 states and 195 transitions. [2024-06-28 00:04:47,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 323 transitions, 6662 flow [2024-06-28 00:04:48,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 323 transitions, 6436 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-28 00:04:48,378 INFO L231 Difference]: Finished difference. Result has 290 places, 288 transitions, 5758 flow [2024-06-28 00:04:48,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5540, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5758, PETRI_PLACES=290, PETRI_TRANSITIONS=288} [2024-06-28 00:04:48,379 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-28 00:04:48,379 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 288 transitions, 5758 flow [2024-06-28 00:04:48,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:48,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:48,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:48,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 00:04:48,379 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:48,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:48,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1690093741, now seen corresponding path program 6 times [2024-06-28 00:04:48,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:48,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083725697] [2024-06-28 00:04:48,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:48,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:48,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:48,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083725697] [2024-06-28 00:04:48,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083725697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:48,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:48,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:48,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229824004] [2024-06-28 00:04:48,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:48,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:48,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:48,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:48,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:48,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:48,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 288 transitions, 5758 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:48,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:48,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:48,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:49,625 INFO L124 PetriNetUnfolderBase]: 1763/3274 cut-off events. [2024-06-28 00:04:49,625 INFO L125 PetriNetUnfolderBase]: For 206232/206238 co-relation queries the response was YES. [2024-06-28 00:04:49,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24511 conditions, 3274 events. 1763/3274 cut-off events. For 206232/206238 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 23026 event pairs, 316 based on Foata normal form. 5/3199 useless extension candidates. Maximal degree in co-relation 24390. Up to 2236 conditions per place. [2024-06-28 00:04:49,666 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 225 selfloop transitions, 87 changer transitions 0/321 dead transitions. [2024-06-28 00:04:49,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 321 transitions, 6460 flow [2024-06-28 00:04:49,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:04:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:04:49,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-28 00:04:49,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4653679653679654 [2024-06-28 00:04:49,668 INFO L175 Difference]: Start difference. First operand has 290 places, 288 transitions, 5758 flow. Second operand 11 states and 215 transitions. [2024-06-28 00:04:49,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 321 transitions, 6460 flow [2024-06-28 00:04:50,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 321 transitions, 6224 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-28 00:04:50,261 INFO L231 Difference]: Finished difference. Result has 293 places, 288 transitions, 5708 flow [2024-06-28 00:04:50,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5522, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5708, PETRI_PLACES=293, PETRI_TRANSITIONS=288} [2024-06-28 00:04:50,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-28 00:04:50,261 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 288 transitions, 5708 flow [2024-06-28 00:04:50,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:50,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:50,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:50,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 00:04:50,262 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:50,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:50,262 INFO L85 PathProgramCache]: Analyzing trace with hash 97130459, now seen corresponding path program 3 times [2024-06-28 00:04:50,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:50,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955074707] [2024-06-28 00:04:50,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:50,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:50,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:50,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:50,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955074707] [2024-06-28 00:04:50,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955074707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:50,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:50,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:50,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581580560] [2024-06-28 00:04:50,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:50,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:50,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:50,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:50,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:50,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:50,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 288 transitions, 5708 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:50,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:50,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:50,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:51,382 INFO L124 PetriNetUnfolderBase]: 1758/3283 cut-off events. [2024-06-28 00:04:51,382 INFO L125 PetriNetUnfolderBase]: For 197455/197467 co-relation queries the response was YES. [2024-06-28 00:04:51,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24306 conditions, 3283 events. 1758/3283 cut-off events. For 197455/197467 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 23219 event pairs, 385 based on Foata normal form. 12/3219 useless extension candidates. Maximal degree in co-relation 24184. Up to 2496 conditions per place. [2024-06-28 00:04:51,421 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 221 selfloop transitions, 82 changer transitions 0/312 dead transitions. [2024-06-28 00:04:51,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 312 transitions, 6382 flow [2024-06-28 00:04:51,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:04:51,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:04:51,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-28 00:04:51,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272108843537415 [2024-06-28 00:04:51,422 INFO L175 Difference]: Start difference. First operand has 293 places, 288 transitions, 5708 flow. Second operand 7 states and 155 transitions. [2024-06-28 00:04:51,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 312 transitions, 6382 flow [2024-06-28 00:04:52,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 312 transitions, 6092 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-28 00:04:52,040 INFO L231 Difference]: Finished difference. Result has 288 places, 288 transitions, 5600 flow [2024-06-28 00:04:52,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5418, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5600, PETRI_PLACES=288, PETRI_TRANSITIONS=288} [2024-06-28 00:04:52,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-28 00:04:52,040 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 288 transitions, 5600 flow [2024-06-28 00:04:52,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:52,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:52,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:52,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 00:04:52,041 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:52,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:52,042 INFO L85 PathProgramCache]: Analyzing trace with hash 485256926, now seen corresponding path program 10 times [2024-06-28 00:04:52,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:52,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248534852] [2024-06-28 00:04:52,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:52,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:52,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:52,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248534852] [2024-06-28 00:04:52,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248534852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:52,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:52,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:52,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9495377] [2024-06-28 00:04:52,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:52,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:52,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:52,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:52,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:52,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:52,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 288 transitions, 5600 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:52,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:52,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:52,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:53,047 INFO L124 PetriNetUnfolderBase]: 1753/3264 cut-off events. [2024-06-28 00:04:53,047 INFO L125 PetriNetUnfolderBase]: For 192718/192724 co-relation queries the response was YES. [2024-06-28 00:04:53,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23844 conditions, 3264 events. 1753/3264 cut-off events. For 192718/192724 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 23001 event pairs, 294 based on Foata normal form. 6/3204 useless extension candidates. Maximal degree in co-relation 23722. Up to 1712 conditions per place. [2024-06-28 00:04:53,090 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 194 selfloop transitions, 114 changer transitions 0/317 dead transitions. [2024-06-28 00:04:53,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 317 transitions, 6673 flow [2024-06-28 00:04:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:04:53,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:04:53,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-28 00:04:53,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-28 00:04:53,090 INFO L175 Difference]: Start difference. First operand has 288 places, 288 transitions, 5600 flow. Second operand 8 states and 172 transitions. [2024-06-28 00:04:53,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 317 transitions, 6673 flow [2024-06-28 00:04:53,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 317 transitions, 6522 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 00:04:53,719 INFO L231 Difference]: Finished difference. Result has 291 places, 292 transitions, 5825 flow [2024-06-28 00:04:53,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5453, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5825, PETRI_PLACES=291, PETRI_TRANSITIONS=292} [2024-06-28 00:04:53,719 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-28 00:04:53,719 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 292 transitions, 5825 flow [2024-06-28 00:04:53,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:53,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:53,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:53,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 00:04:53,720 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:53,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:53,720 INFO L85 PathProgramCache]: Analyzing trace with hash 485251346, now seen corresponding path program 11 times [2024-06-28 00:04:53,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:53,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213439729] [2024-06-28 00:04:53,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:53,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:53,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:53,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213439729] [2024-06-28 00:04:53,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213439729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:53,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:53,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:53,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140218910] [2024-06-28 00:04:53,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:53,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:53,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:53,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:53,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:53,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:53,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 292 transitions, 5825 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:53,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:53,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:53,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:54,837 INFO L124 PetriNetUnfolderBase]: 1748/3259 cut-off events. [2024-06-28 00:04:54,838 INFO L125 PetriNetUnfolderBase]: For 191814/191820 co-relation queries the response was YES. [2024-06-28 00:04:54,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23891 conditions, 3259 events. 1748/3259 cut-off events. For 191814/191820 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 23020 event pairs, 261 based on Foata normal form. 6/3202 useless extension candidates. Maximal degree in co-relation 23770. Up to 1710 conditions per place. [2024-06-28 00:04:54,885 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 196 selfloop transitions, 111 changer transitions 0/316 dead transitions. [2024-06-28 00:04:54,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 316 transitions, 6627 flow [2024-06-28 00:04:54,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:04:54,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:04:54,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-28 00:04:54,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-06-28 00:04:54,886 INFO L175 Difference]: Start difference. First operand has 291 places, 292 transitions, 5825 flow. Second operand 8 states and 171 transitions. [2024-06-28 00:04:54,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 316 transitions, 6627 flow [2024-06-28 00:04:55,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 316 transitions, 6415 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-28 00:04:55,559 INFO L231 Difference]: Finished difference. Result has 295 places, 292 transitions, 5840 flow [2024-06-28 00:04:55,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5613, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5840, PETRI_PLACES=295, PETRI_TRANSITIONS=292} [2024-06-28 00:04:55,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-28 00:04:55,560 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 292 transitions, 5840 flow [2024-06-28 00:04:55,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:55,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:55,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:55,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 00:04:55,561 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:55,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:55,562 INFO L85 PathProgramCache]: Analyzing trace with hash 969965349, now seen corresponding path program 1 times [2024-06-28 00:04:55,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:55,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612564707] [2024-06-28 00:04:55,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:55,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:55,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:55,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612564707] [2024-06-28 00:04:55,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612564707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:55,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:55,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:55,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017141858] [2024-06-28 00:04:55,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:55,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:55,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:55,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:55,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:55,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:55,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 292 transitions, 5840 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:55,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:55,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:55,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:56,858 INFO L124 PetriNetUnfolderBase]: 1743/3258 cut-off events. [2024-06-28 00:04:56,858 INFO L125 PetriNetUnfolderBase]: For 187613/187631 co-relation queries the response was YES. [2024-06-28 00:04:56,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23838 conditions, 3258 events. 1743/3258 cut-off events. For 187613/187631 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 23027 event pairs, 441 based on Foata normal form. 12/3200 useless extension candidates. Maximal degree in co-relation 23716. Up to 2490 conditions per place. [2024-06-28 00:04:56,898 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 284 selfloop transitions, 36 changer transitions 0/329 dead transitions. [2024-06-28 00:04:56,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 329 transitions, 6777 flow [2024-06-28 00:04:56,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:04:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:04:56,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-28 00:04:56,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-28 00:04:56,899 INFO L175 Difference]: Start difference. First operand has 295 places, 292 transitions, 5840 flow. Second operand 9 states and 186 transitions. [2024-06-28 00:04:56,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 329 transitions, 6777 flow [2024-06-28 00:04:57,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 329 transitions, 6539 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 00:04:57,495 INFO L231 Difference]: Finished difference. Result has 297 places, 294 transitions, 5746 flow [2024-06-28 00:04:57,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5602, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5746, PETRI_PLACES=297, PETRI_TRANSITIONS=294} [2024-06-28 00:04:57,496 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-28 00:04:57,496 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 294 transitions, 5746 flow [2024-06-28 00:04:57,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:57,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:57,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:57,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 00:04:57,497 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:57,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:57,497 INFO L85 PathProgramCache]: Analyzing trace with hash -66169325, now seen corresponding path program 4 times [2024-06-28 00:04:57,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:57,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106904588] [2024-06-28 00:04:57,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:57,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:58,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:58,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106904588] [2024-06-28 00:04:58,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106904588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:58,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:58,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:58,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743495576] [2024-06-28 00:04:58,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:58,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:58,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:58,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:58,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:58,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:58,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 294 transitions, 5746 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:58,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:58,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:58,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:59,005 INFO L124 PetriNetUnfolderBase]: 1751/3256 cut-off events. [2024-06-28 00:04:59,005 INFO L125 PetriNetUnfolderBase]: For 190171/190189 co-relation queries the response was YES. [2024-06-28 00:04:59,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23763 conditions, 3256 events. 1751/3256 cut-off events. For 190171/190189 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 22912 event pairs, 402 based on Foata normal form. 12/3190 useless extension candidates. Maximal degree in co-relation 23640. Up to 2305 conditions per place. [2024-06-28 00:04:59,047 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 193 selfloop transitions, 125 changer transitions 0/327 dead transitions. [2024-06-28 00:04:59,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 327 transitions, 6770 flow [2024-06-28 00:04:59,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:04:59,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:04:59,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-28 00:04:59,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-06-28 00:04:59,048 INFO L175 Difference]: Start difference. First operand has 297 places, 294 transitions, 5746 flow. Second operand 9 states and 188 transitions. [2024-06-28 00:04:59,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 327 transitions, 6770 flow [2024-06-28 00:04:59,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 327 transitions, 6645 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 00:04:59,724 INFO L231 Difference]: Finished difference. Result has 300 places, 296 transitions, 5912 flow [2024-06-28 00:04:59,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5621, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5912, PETRI_PLACES=300, PETRI_TRANSITIONS=296} [2024-06-28 00:04:59,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-28 00:04:59,725 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 296 transitions, 5912 flow [2024-06-28 00:04:59,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:59,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:59,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:59,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 00:04:59,725 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:04:59,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:59,725 INFO L85 PathProgramCache]: Analyzing trace with hash -66615198, now seen corresponding path program 12 times [2024-06-28 00:04:59,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:59,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009950238] [2024-06-28 00:04:59,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:59,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:59,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:59,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009950238] [2024-06-28 00:04:59,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009950238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:59,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:59,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:59,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095466469] [2024-06-28 00:04:59,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:59,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:59,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:59,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:59,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:59,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:04:59,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 296 transitions, 5912 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:59,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:59,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:04:59,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:00,817 INFO L124 PetriNetUnfolderBase]: 1759/3276 cut-off events. [2024-06-28 00:05:00,818 INFO L125 PetriNetUnfolderBase]: For 201942/201948 co-relation queries the response was YES. [2024-06-28 00:05:00,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24138 conditions, 3276 events. 1759/3276 cut-off events. For 201942/201948 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 23128 event pairs, 229 based on Foata normal form. 3/3207 useless extension candidates. Maximal degree in co-relation 24014. Up to 1243 conditions per place. [2024-06-28 00:05:00,890 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 186 selfloop transitions, 132 changer transitions 0/327 dead transitions. [2024-06-28 00:05:00,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 327 transitions, 7014 flow [2024-06-28 00:05:00,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:05:00,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:05:00,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-28 00:05:00,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 00:05:00,891 INFO L175 Difference]: Start difference. First operand has 300 places, 296 transitions, 5912 flow. Second operand 8 states and 168 transitions. [2024-06-28 00:05:00,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 327 transitions, 7014 flow [2024-06-28 00:05:01,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 327 transitions, 6604 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-28 00:05:01,504 INFO L231 Difference]: Finished difference. Result has 299 places, 298 transitions, 5841 flow [2024-06-28 00:05:01,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5502, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5841, PETRI_PLACES=299, PETRI_TRANSITIONS=298} [2024-06-28 00:05:01,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-28 00:05:01,504 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 298 transitions, 5841 flow [2024-06-28 00:05:01,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:01,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:01,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:01,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 00:05:01,505 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:01,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:01,505 INFO L85 PathProgramCache]: Analyzing trace with hash -458217041, now seen corresponding path program 5 times [2024-06-28 00:05:01,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:01,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254686313] [2024-06-28 00:05:01,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:01,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:01,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:01,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254686313] [2024-06-28 00:05:01,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254686313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:01,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:01,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:01,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061526069] [2024-06-28 00:05:01,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:01,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:01,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:01,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:01,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:01,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:01,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 298 transitions, 5841 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:01,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:01,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:01,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:02,695 INFO L124 PetriNetUnfolderBase]: 1750/3261 cut-off events. [2024-06-28 00:05:02,695 INFO L125 PetriNetUnfolderBase]: For 199211/199229 co-relation queries the response was YES. [2024-06-28 00:05:02,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24139 conditions, 3261 events. 1750/3261 cut-off events. For 199211/199229 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 23021 event pairs, 392 based on Foata normal form. 12/3195 useless extension candidates. Maximal degree in co-relation 24014. Up to 2305 conditions per place. [2024-06-28 00:05:02,736 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 196 selfloop transitions, 121 changer transitions 0/326 dead transitions. [2024-06-28 00:05:02,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 326 transitions, 6691 flow [2024-06-28 00:05:02,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:05:02,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:05:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-28 00:05:02,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306122448979592 [2024-06-28 00:05:02,739 INFO L175 Difference]: Start difference. First operand has 299 places, 298 transitions, 5841 flow. Second operand 7 states and 156 transitions. [2024-06-28 00:05:02,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 326 transitions, 6691 flow [2024-06-28 00:05:03,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 326 transitions, 6368 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-28 00:05:03,395 INFO L231 Difference]: Finished difference. Result has 300 places, 298 transitions, 5770 flow [2024-06-28 00:05:03,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5518, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5770, PETRI_PLACES=300, PETRI_TRANSITIONS=298} [2024-06-28 00:05:03,395 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-28 00:05:03,395 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 298 transitions, 5770 flow [2024-06-28 00:05:03,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:03,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:03,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:03,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 00:05:03,396 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:03,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:03,396 INFO L85 PathProgramCache]: Analyzing trace with hash 91672286, now seen corresponding path program 13 times [2024-06-28 00:05:03,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:03,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553071074] [2024-06-28 00:05:03,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:03,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:03,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:03,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553071074] [2024-06-28 00:05:03,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553071074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:03,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:03,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:03,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324394576] [2024-06-28 00:05:03,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:03,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:03,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:03,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:03,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:03,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:03,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 298 transitions, 5770 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:03,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:03,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:03,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:04,527 INFO L124 PetriNetUnfolderBase]: 1784/3319 cut-off events. [2024-06-28 00:05:04,528 INFO L125 PetriNetUnfolderBase]: For 215968/215974 co-relation queries the response was YES. [2024-06-28 00:05:04,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24808 conditions, 3319 events. 1784/3319 cut-off events. For 215968/215974 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 23435 event pairs, 261 based on Foata normal form. 3/3244 useless extension candidates. Maximal degree in co-relation 24682. Up to 1249 conditions per place. [2024-06-28 00:05:04,564 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 202 selfloop transitions, 119 changer transitions 0/330 dead transitions. [2024-06-28 00:05:04,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 330 transitions, 7160 flow [2024-06-28 00:05:04,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:05:04,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:05:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-28 00:05:04,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-06-28 00:05:04,565 INFO L175 Difference]: Start difference. First operand has 300 places, 298 transitions, 5770 flow. Second operand 8 states and 166 transitions. [2024-06-28 00:05:04,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 330 transitions, 7160 flow [2024-06-28 00:05:05,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 330 transitions, 6909 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 00:05:05,273 INFO L231 Difference]: Finished difference. Result has 302 places, 305 transitions, 6042 flow [2024-06-28 00:05:05,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5525, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6042, PETRI_PLACES=302, PETRI_TRANSITIONS=305} [2024-06-28 00:05:05,273 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-28 00:05:05,273 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 305 transitions, 6042 flow [2024-06-28 00:05:05,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:05,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:05,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:05,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 00:05:05,274 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:05,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:05,274 INFO L85 PathProgramCache]: Analyzing trace with hash 91666923, now seen corresponding path program 7 times [2024-06-28 00:05:05,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:05,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965676275] [2024-06-28 00:05:05,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:05,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:05,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:05,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965676275] [2024-06-28 00:05:05,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965676275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:05,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:05,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:05,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005330875] [2024-06-28 00:05:05,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:05,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:05,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:05,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:05,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:05,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:05,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 305 transitions, 6042 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:05,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:05,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:05,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:06,562 INFO L124 PetriNetUnfolderBase]: 1796/3339 cut-off events. [2024-06-28 00:05:06,562 INFO L125 PetriNetUnfolderBase]: For 225881/225887 co-relation queries the response was YES. [2024-06-28 00:05:06,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25058 conditions, 3339 events. 1796/3339 cut-off events. For 225881/225887 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 23678 event pairs, 275 based on Foata normal form. 5/3258 useless extension candidates. Maximal degree in co-relation 24932. Up to 2055 conditions per place. [2024-06-28 00:05:06,620 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 244 selfloop transitions, 76 changer transitions 0/329 dead transitions. [2024-06-28 00:05:06,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 329 transitions, 6894 flow [2024-06-28 00:05:06,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:05:06,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:05:06,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-28 00:05:06,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 00:05:06,621 INFO L175 Difference]: Start difference. First operand has 302 places, 305 transitions, 6042 flow. Second operand 7 states and 147 transitions. [2024-06-28 00:05:06,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 329 transitions, 6894 flow [2024-06-28 00:05:07,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 329 transitions, 6740 flow, removed 43 selfloop flow, removed 2 redundant places. [2024-06-28 00:05:07,476 INFO L231 Difference]: Finished difference. Result has 307 places, 306 transitions, 6065 flow [2024-06-28 00:05:07,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5888, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6065, PETRI_PLACES=307, PETRI_TRANSITIONS=306} [2024-06-28 00:05:07,476 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-28 00:05:07,477 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 306 transitions, 6065 flow [2024-06-28 00:05:07,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:07,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:07,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:07,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 00:05:07,477 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:07,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:07,477 INFO L85 PathProgramCache]: Analyzing trace with hash 789164783, now seen corresponding path program 6 times [2024-06-28 00:05:07,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:07,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443429456] [2024-06-28 00:05:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:07,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:07,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:07,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443429456] [2024-06-28 00:05:07,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443429456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:07,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:07,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:07,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025390332] [2024-06-28 00:05:07,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:07,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:07,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:07,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:07,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:07,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:07,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 306 transitions, 6065 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:07,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:07,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:07,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:08,836 INFO L124 PetriNetUnfolderBase]: 1804/3359 cut-off events. [2024-06-28 00:05:08,836 INFO L125 PetriNetUnfolderBase]: For 221950/221968 co-relation queries the response was YES. [2024-06-28 00:05:08,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25296 conditions, 3359 events. 1804/3359 cut-off events. For 221950/221968 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 23868 event pairs, 407 based on Foata normal form. 12/3288 useless extension candidates. Maximal degree in co-relation 25168. Up to 2383 conditions per place. [2024-06-28 00:05:08,901 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 215 selfloop transitions, 109 changer transitions 0/333 dead transitions. [2024-06-28 00:05:08,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 333 transitions, 7099 flow [2024-06-28 00:05:08,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:05:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:05:08,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-28 00:05:08,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-28 00:05:08,902 INFO L175 Difference]: Start difference. First operand has 307 places, 306 transitions, 6065 flow. Second operand 7 states and 154 transitions. [2024-06-28 00:05:08,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 333 transitions, 7099 flow [2024-06-28 00:05:09,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 333 transitions, 6990 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 00:05:09,810 INFO L231 Difference]: Finished difference. Result has 310 places, 308 transitions, 6217 flow [2024-06-28 00:05:09,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5956, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6217, PETRI_PLACES=310, PETRI_TRANSITIONS=308} [2024-06-28 00:05:09,810 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-28 00:05:09,810 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 308 transitions, 6217 flow [2024-06-28 00:05:09,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:09,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:09,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:09,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 00:05:09,811 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:09,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:09,812 INFO L85 PathProgramCache]: Analyzing trace with hash -299935540, now seen corresponding path program 14 times [2024-06-28 00:05:09,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:09,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875756514] [2024-06-28 00:05:09,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:09,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:10,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:10,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:10,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875756514] [2024-06-28 00:05:10,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875756514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:10,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:10,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:10,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703535603] [2024-06-28 00:05:10,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:10,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:10,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:10,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:10,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:10,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:10,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 308 transitions, 6217 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:10,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:10,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:10,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:10,960 INFO L124 PetriNetUnfolderBase]: 1799/3340 cut-off events. [2024-06-28 00:05:10,960 INFO L125 PetriNetUnfolderBase]: For 222937/222943 co-relation queries the response was YES. [2024-06-28 00:05:10,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25203 conditions, 3340 events. 1799/3340 cut-off events. For 222937/222943 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 23619 event pairs, 237 based on Foata normal form. 3/3265 useless extension candidates. Maximal degree in co-relation 25074. Up to 1251 conditions per place. [2024-06-28 00:05:11,011 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 200 selfloop transitions, 122 changer transitions 0/331 dead transitions. [2024-06-28 00:05:11,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 331 transitions, 7203 flow [2024-06-28 00:05:11,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:05:11,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:05:11,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-28 00:05:11,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-28 00:05:11,012 INFO L175 Difference]: Start difference. First operand has 310 places, 308 transitions, 6217 flow. Second operand 8 states and 164 transitions. [2024-06-28 00:05:11,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 331 transitions, 7203 flow [2024-06-28 00:05:11,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 331 transitions, 6934 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-28 00:05:11,803 INFO L231 Difference]: Finished difference. Result has 313 places, 308 transitions, 6201 flow [2024-06-28 00:05:11,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5952, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6201, PETRI_PLACES=313, PETRI_TRANSITIONS=308} [2024-06-28 00:05:11,804 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-28 00:05:11,804 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 308 transitions, 6201 flow [2024-06-28 00:05:11,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:11,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:11,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:11,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 00:05:11,804 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:11,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:11,804 INFO L85 PathProgramCache]: Analyzing trace with hash 105725919, now seen corresponding path program 7 times [2024-06-28 00:05:11,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:11,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880570241] [2024-06-28 00:05:11,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:11,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:12,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:12,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880570241] [2024-06-28 00:05:12,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880570241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:12,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:12,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:12,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633096957] [2024-06-28 00:05:12,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:12,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:12,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:12,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:12,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:12,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:12,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 308 transitions, 6201 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:12,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:12,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:12,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:13,058 INFO L124 PetriNetUnfolderBase]: 1790/3329 cut-off events. [2024-06-28 00:05:13,058 INFO L125 PetriNetUnfolderBase]: For 216264/216282 co-relation queries the response was YES. [2024-06-28 00:05:13,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25043 conditions, 3329 events. 1790/3329 cut-off events. For 216264/216282 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 23582 event pairs, 412 based on Foata normal form. 12/3257 useless extension candidates. Maximal degree in co-relation 24914. Up to 2364 conditions per place. [2024-06-28 00:05:13,109 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 212 selfloop transitions, 111 changer transitions 0/332 dead transitions. [2024-06-28 00:05:13,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 332 transitions, 7057 flow [2024-06-28 00:05:13,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:05:13,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:05:13,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-28 00:05:13,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-06-28 00:05:13,110 INFO L175 Difference]: Start difference. First operand has 313 places, 308 transitions, 6201 flow. Second operand 7 states and 153 transitions. [2024-06-28 00:05:13,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 332 transitions, 7057 flow [2024-06-28 00:05:14,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 332 transitions, 6809 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 00:05:14,044 INFO L231 Difference]: Finished difference. Result has 314 places, 308 transitions, 6183 flow [2024-06-28 00:05:14,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5953, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6183, PETRI_PLACES=314, PETRI_TRANSITIONS=308} [2024-06-28 00:05:14,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-28 00:05:14,045 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 308 transitions, 6183 flow [2024-06-28 00:05:14,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:14,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:14,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:14,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 00:05:14,046 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:14,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:14,046 INFO L85 PathProgramCache]: Analyzing trace with hash 99023936, now seen corresponding path program 15 times [2024-06-28 00:05:14,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:14,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711230210] [2024-06-28 00:05:14,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:14,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:14,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:14,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711230210] [2024-06-28 00:05:14,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711230210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:14,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:14,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:14,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828923556] [2024-06-28 00:05:14,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:14,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:14,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:14,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:14,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:14,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:14,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 308 transitions, 6183 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:14,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:14,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:14,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:15,127 INFO L124 PetriNetUnfolderBase]: 1785/3318 cut-off events. [2024-06-28 00:05:15,127 INFO L125 PetriNetUnfolderBase]: For 212946/212952 co-relation queries the response was YES. [2024-06-28 00:05:15,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24722 conditions, 3318 events. 1785/3318 cut-off events. For 212946/212952 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 23443 event pairs, 262 based on Foata normal form. 3/3242 useless extension candidates. Maximal degree in co-relation 24592. Up to 1239 conditions per place. [2024-06-28 00:05:15,187 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 196 selfloop transitions, 125 changer transitions 0/330 dead transitions. [2024-06-28 00:05:15,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 330 transitions, 7023 flow [2024-06-28 00:05:15,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:05:15,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:05:15,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-28 00:05:15,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-28 00:05:15,188 INFO L175 Difference]: Start difference. First operand has 314 places, 308 transitions, 6183 flow. Second operand 8 states and 163 transitions. [2024-06-28 00:05:15,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 330 transitions, 7023 flow [2024-06-28 00:05:15,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 330 transitions, 6733 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-28 00:05:15,960 INFO L231 Difference]: Finished difference. Result has 316 places, 308 transitions, 6148 flow [2024-06-28 00:05:15,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5893, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6148, PETRI_PLACES=316, PETRI_TRANSITIONS=308} [2024-06-28 00:05:15,961 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-28 00:05:15,961 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 308 transitions, 6148 flow [2024-06-28 00:05:15,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:15,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:15,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:15,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 00:05:15,961 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:15,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:15,962 INFO L85 PathProgramCache]: Analyzing trace with hash 91324241, now seen corresponding path program 8 times [2024-06-28 00:05:15,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:15,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546233022] [2024-06-28 00:05:15,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:15,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:16,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:16,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546233022] [2024-06-28 00:05:16,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546233022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:16,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:16,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:16,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023590039] [2024-06-28 00:05:16,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:16,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:16,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:16,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:16,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:16,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:16,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 308 transitions, 6148 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:16,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:16,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:16,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:17,360 INFO L124 PetriNetUnfolderBase]: 1843/3406 cut-off events. [2024-06-28 00:05:17,360 INFO L125 PetriNetUnfolderBase]: For 239798/239847 co-relation queries the response was YES. [2024-06-28 00:05:17,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25755 conditions, 3406 events. 1843/3406 cut-off events. For 239798/239847 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 24176 event pairs, 522 based on Foata normal form. 25/3333 useless extension candidates. Maximal degree in co-relation 25624. Up to 2409 conditions per place. [2024-06-28 00:05:17,412 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 194 selfloop transitions, 138 changer transitions 0/341 dead transitions. [2024-06-28 00:05:17,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 341 transitions, 7420 flow [2024-06-28 00:05:17,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:05:17,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:05:17,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-28 00:05:17,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-28 00:05:17,413 INFO L175 Difference]: Start difference. First operand has 316 places, 308 transitions, 6148 flow. Second operand 9 states and 179 transitions. [2024-06-28 00:05:17,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 341 transitions, 7420 flow [2024-06-28 00:05:18,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 341 transitions, 7128 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-28 00:05:18,211 INFO L231 Difference]: Finished difference. Result has 318 places, 320 transitions, 6410 flow [2024-06-28 00:05:18,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5868, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6410, PETRI_PLACES=318, PETRI_TRANSITIONS=320} [2024-06-28 00:05:18,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-28 00:05:18,211 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 320 transitions, 6410 flow [2024-06-28 00:05:18,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:18,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:18,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:18,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 00:05:18,212 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:18,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:18,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1823519808, now seen corresponding path program 16 times [2024-06-28 00:05:18,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:18,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047229823] [2024-06-28 00:05:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:18,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:18,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:18,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047229823] [2024-06-28 00:05:18,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047229823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:18,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:18,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:18,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160118662] [2024-06-28 00:05:18,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:18,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:18,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:18,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:18,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:18,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:18,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 320 transitions, 6410 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:18,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:18,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:18,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:19,433 INFO L124 PetriNetUnfolderBase]: 1851/3409 cut-off events. [2024-06-28 00:05:19,433 INFO L125 PetriNetUnfolderBase]: For 246287/246324 co-relation queries the response was YES. [2024-06-28 00:05:19,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25878 conditions, 3409 events. 1851/3409 cut-off events. For 246287/246324 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 24232 event pairs, 555 based on Foata normal form. 10/3305 useless extension candidates. Maximal degree in co-relation 25745. Up to 1323 conditions per place. [2024-06-28 00:05:19,486 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 179 selfloop transitions, 154 changer transitions 0/342 dead transitions. [2024-06-28 00:05:19,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 342 transitions, 7522 flow [2024-06-28 00:05:19,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:05:19,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:05:19,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 00:05:19,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-28 00:05:19,487 INFO L175 Difference]: Start difference. First operand has 318 places, 320 transitions, 6410 flow. Second operand 8 states and 159 transitions. [2024-06-28 00:05:19,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 342 transitions, 7522 flow [2024-06-28 00:05:20,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 342 transitions, 7244 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 00:05:20,457 INFO L231 Difference]: Finished difference. Result has 320 places, 324 transitions, 6551 flow [2024-06-28 00:05:20,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6132, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6551, PETRI_PLACES=320, PETRI_TRANSITIONS=324} [2024-06-28 00:05:20,458 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-28 00:05:20,458 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 324 transitions, 6551 flow [2024-06-28 00:05:20,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:20,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:20,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:20,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 00:05:20,458 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:20,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:20,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1816168158, now seen corresponding path program 17 times [2024-06-28 00:05:20,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:20,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375647515] [2024-06-28 00:05:20,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:20,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:20,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:20,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375647515] [2024-06-28 00:05:20,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375647515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:20,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:20,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:20,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968140249] [2024-06-28 00:05:20,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:20,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:20,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:20,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:20,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:20,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:20,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 324 transitions, 6551 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:20,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:20,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:20,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:21,672 INFO L124 PetriNetUnfolderBase]: 1872/3436 cut-off events. [2024-06-28 00:05:21,672 INFO L125 PetriNetUnfolderBase]: For 262938/262975 co-relation queries the response was YES. [2024-06-28 00:05:21,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26697 conditions, 3436 events. 1872/3436 cut-off events. For 262938/262975 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 24300 event pairs, 540 based on Foata normal form. 10/3325 useless extension candidates. Maximal degree in co-relation 26563. Up to 1333 conditions per place. [2024-06-28 00:05:21,726 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 188 selfloop transitions, 151 changer transitions 0/348 dead transitions. [2024-06-28 00:05:21,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 348 transitions, 7885 flow [2024-06-28 00:05:21,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:05:21,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:05:21,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-28 00:05:21,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-28 00:05:21,727 INFO L175 Difference]: Start difference. First operand has 320 places, 324 transitions, 6551 flow. Second operand 8 states and 162 transitions. [2024-06-28 00:05:21,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 348 transitions, 7885 flow [2024-06-28 00:05:22,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 348 transitions, 7574 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-28 00:05:22,625 INFO L231 Difference]: Finished difference. Result has 323 places, 328 transitions, 6703 flow [2024-06-28 00:05:22,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6254, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6703, PETRI_PLACES=323, PETRI_TRANSITIONS=328} [2024-06-28 00:05:22,625 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-28 00:05:22,626 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 328 transitions, 6703 flow [2024-06-28 00:05:22,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:22,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:22,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:22,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 00:05:22,626 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:22,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:22,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1596210781, now seen corresponding path program 8 times [2024-06-28 00:05:22,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:22,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346442812] [2024-06-28 00:05:22,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:22,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:23,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:23,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346442812] [2024-06-28 00:05:23,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346442812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:23,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:23,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:23,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354107242] [2024-06-28 00:05:23,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:23,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:23,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:23,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:23,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:23,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:23,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 328 transitions, 6703 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:23,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:23,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:23,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:23,990 INFO L124 PetriNetUnfolderBase]: 1884/3488 cut-off events. [2024-06-28 00:05:23,990 INFO L125 PetriNetUnfolderBase]: For 270422/270456 co-relation queries the response was YES. [2024-06-28 00:05:24,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26652 conditions, 3488 events. 1884/3488 cut-off events. For 270422/270456 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 24860 event pairs, 307 based on Foata normal form. 18/3419 useless extension candidates. Maximal degree in co-relation 26517. Up to 2175 conditions per place. [2024-06-28 00:05:24,038 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 261 selfloop transitions, 77 changer transitions 0/347 dead transitions. [2024-06-28 00:05:24,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 347 transitions, 7591 flow [2024-06-28 00:05:24,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:05:24,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:05:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-28 00:05:24,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-28 00:05:24,039 INFO L175 Difference]: Start difference. First operand has 323 places, 328 transitions, 6703 flow. Second operand 7 states and 142 transitions. [2024-06-28 00:05:24,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 347 transitions, 7591 flow [2024-06-28 00:05:25,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 347 transitions, 7264 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-28 00:05:25,105 INFO L231 Difference]: Finished difference. Result has 326 places, 329 transitions, 6555 flow [2024-06-28 00:05:25,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6376, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6555, PETRI_PLACES=326, PETRI_TRANSITIONS=329} [2024-06-28 00:05:25,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-28 00:05:25,106 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 329 transitions, 6555 flow [2024-06-28 00:05:25,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:25,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:25,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:25,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 00:05:25,107 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:25,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:25,107 INFO L85 PathProgramCache]: Analyzing trace with hash 766189487, now seen corresponding path program 9 times [2024-06-28 00:05:25,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:25,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423686147] [2024-06-28 00:05:25,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:25,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:25,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:25,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423686147] [2024-06-28 00:05:25,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423686147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:25,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:25,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:25,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869934929] [2024-06-28 00:05:25,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:25,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:25,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:25,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:25,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:25,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:25,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 329 transitions, 6555 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:25,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:25,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:25,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:26,436 INFO L124 PetriNetUnfolderBase]: 1874/3503 cut-off events. [2024-06-28 00:05:26,436 INFO L125 PetriNetUnfolderBase]: For 260180/260226 co-relation queries the response was YES. [2024-06-28 00:05:26,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26026 conditions, 3503 events. 1874/3503 cut-off events. For 260180/260226 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 25181 event pairs, 415 based on Foata normal form. 27/3442 useless extension candidates. Maximal degree in co-relation 25890. Up to 2464 conditions per place. [2024-06-28 00:05:26,483 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 212 selfloop transitions, 127 changer transitions 0/348 dead transitions. [2024-06-28 00:05:26,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 348 transitions, 7441 flow [2024-06-28 00:05:26,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:05:26,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:05:26,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-28 00:05:26,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2024-06-28 00:05:26,485 INFO L175 Difference]: Start difference. First operand has 326 places, 329 transitions, 6555 flow. Second operand 7 states and 148 transitions. [2024-06-28 00:05:26,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 348 transitions, 7441 flow [2024-06-28 00:05:27,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 348 transitions, 7208 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-28 00:05:27,402 INFO L231 Difference]: Finished difference. Result has 326 places, 329 transitions, 6592 flow [2024-06-28 00:05:27,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6324, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6592, PETRI_PLACES=326, PETRI_TRANSITIONS=329} [2024-06-28 00:05:27,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-28 00:05:27,403 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 329 transitions, 6592 flow [2024-06-28 00:05:27,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:27,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:27,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:27,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 00:05:27,404 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:27,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:27,404 INFO L85 PathProgramCache]: Analyzing trace with hash 616333684, now seen corresponding path program 18 times [2024-06-28 00:05:27,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:27,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067598832] [2024-06-28 00:05:27,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:27,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:27,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:27,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:27,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067598832] [2024-06-28 00:05:27,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067598832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:27,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:27,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:27,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774777582] [2024-06-28 00:05:27,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:27,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:27,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:27,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:27,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:27,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:27,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 329 transitions, 6592 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:27,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:27,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:27,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:28,564 INFO L124 PetriNetUnfolderBase]: 1865/3447 cut-off events. [2024-06-28 00:05:28,564 INFO L125 PetriNetUnfolderBase]: For 243893/243899 co-relation queries the response was YES. [2024-06-28 00:05:28,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25671 conditions, 3447 events. 1865/3447 cut-off events. For 243893/243899 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 24524 event pairs, 347 based on Foata normal form. 3/3349 useless extension candidates. Maximal degree in co-relation 25535. Up to 2701 conditions per place. [2024-06-28 00:05:28,611 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 301 selfloop transitions, 36 changer transitions 0/346 dead transitions. [2024-06-28 00:05:28,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 346 transitions, 7361 flow [2024-06-28 00:05:28,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:05:28,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:05:28,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 00:05:28,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-28 00:05:28,612 INFO L175 Difference]: Start difference. First operand has 326 places, 329 transitions, 6592 flow. Second operand 8 states and 151 transitions. [2024-06-28 00:05:28,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 346 transitions, 7361 flow [2024-06-28 00:05:29,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 346 transitions, 7083 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 00:05:29,569 INFO L231 Difference]: Finished difference. Result has 326 places, 330 transitions, 6452 flow [2024-06-28 00:05:29,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6314, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6452, PETRI_PLACES=326, PETRI_TRANSITIONS=330} [2024-06-28 00:05:29,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-28 00:05:29,570 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 330 transitions, 6452 flow [2024-06-28 00:05:29,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:29,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:29,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:29,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 00:05:29,570 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:29,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:29,571 INFO L85 PathProgramCache]: Analyzing trace with hash 620065061, now seen corresponding path program 9 times [2024-06-28 00:05:29,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:29,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431494120] [2024-06-28 00:05:29,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:29,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:29,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:29,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:29,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431494120] [2024-06-28 00:05:29,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431494120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:29,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:29,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:29,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688440251] [2024-06-28 00:05:29,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:29,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:29,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:29,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:29,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:29,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:29,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 330 transitions, 6452 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:29,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:29,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:29,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:30,927 INFO L124 PetriNetUnfolderBase]: 1857/3445 cut-off events. [2024-06-28 00:05:30,927 INFO L125 PetriNetUnfolderBase]: For 235164/235198 co-relation queries the response was YES. [2024-06-28 00:05:30,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24970 conditions, 3445 events. 1857/3445 cut-off events. For 235164/235198 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 24479 event pairs, 304 based on Foata normal form. 18/3380 useless extension candidates. Maximal degree in co-relation 24835. Up to 2142 conditions per place. [2024-06-28 00:05:30,983 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 266 selfloop transitions, 74 changer transitions 0/349 dead transitions. [2024-06-28 00:05:30,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 349 transitions, 7328 flow [2024-06-28 00:05:30,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:05:30,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:05:30,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-28 00:05:30,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-28 00:05:30,984 INFO L175 Difference]: Start difference. First operand has 326 places, 330 transitions, 6452 flow. Second operand 7 states and 143 transitions. [2024-06-28 00:05:30,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 349 transitions, 7328 flow [2024-06-28 00:05:32,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 349 transitions, 7195 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-28 00:05:32,042 INFO L231 Difference]: Finished difference. Result has 327 places, 330 transitions, 6474 flow [2024-06-28 00:05:32,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6319, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6474, PETRI_PLACES=327, PETRI_TRANSITIONS=330} [2024-06-28 00:05:32,043 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-28 00:05:32,043 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 330 transitions, 6474 flow [2024-06-28 00:05:32,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:32,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:32,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:32,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 00:05:32,043 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:32,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:32,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1816162578, now seen corresponding path program 19 times [2024-06-28 00:05:32,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:32,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429890666] [2024-06-28 00:05:32,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:32,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:32,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:32,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429890666] [2024-06-28 00:05:32,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429890666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:32,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:32,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:32,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171171054] [2024-06-28 00:05:32,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:32,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:32,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:32,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:32,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:32,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:32,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 330 transitions, 6474 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:32,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:32,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:32,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:33,205 INFO L124 PetriNetUnfolderBase]: 1852/3417 cut-off events. [2024-06-28 00:05:33,205 INFO L125 PetriNetUnfolderBase]: For 234023/234060 co-relation queries the response was YES. [2024-06-28 00:05:33,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24846 conditions, 3417 events. 1852/3417 cut-off events. For 234023/234060 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 24312 event pairs, 530 based on Foata normal form. 10/3308 useless extension candidates. Maximal degree in co-relation 24710. Up to 1327 conditions per place. [2024-06-28 00:05:33,264 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 186 selfloop transitions, 153 changer transitions 0/348 dead transitions. [2024-06-28 00:05:33,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 348 transitions, 7504 flow [2024-06-28 00:05:33,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:05:33,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:05:33,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 00:05:33,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-28 00:05:33,265 INFO L175 Difference]: Start difference. First operand has 327 places, 330 transitions, 6474 flow. Second operand 8 states and 160 transitions. [2024-06-28 00:05:33,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 348 transitions, 7504 flow [2024-06-28 00:05:34,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 348 transitions, 7076 flow, removed 39 selfloop flow, removed 9 redundant places. [2024-06-28 00:05:34,077 INFO L231 Difference]: Finished difference. Result has 326 places, 330 transitions, 6361 flow [2024-06-28 00:05:34,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6050, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6361, PETRI_PLACES=326, PETRI_TRANSITIONS=330} [2024-06-28 00:05:34,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-28 00:05:34,078 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 330 transitions, 6361 flow [2024-06-28 00:05:34,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:34,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:34,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:34,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 00:05:34,079 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:34,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:34,079 INFO L85 PathProgramCache]: Analyzing trace with hash -136539351, now seen corresponding path program 10 times [2024-06-28 00:05:34,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:34,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881256130] [2024-06-28 00:05:34,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:34,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:34,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:34,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881256130] [2024-06-28 00:05:34,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881256130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:34,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:34,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:34,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145099459] [2024-06-28 00:05:34,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:34,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:34,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:34,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:34,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:34,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:34,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 330 transitions, 6361 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:34,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:34,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:34,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:35,445 INFO L124 PetriNetUnfolderBase]: 1844/3423 cut-off events. [2024-06-28 00:05:35,446 INFO L125 PetriNetUnfolderBase]: For 215574/215580 co-relation queries the response was YES. [2024-06-28 00:05:35,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23909 conditions, 3423 events. 1844/3423 cut-off events. For 215574/215580 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 24366 event pairs, 346 based on Foata normal form. 5/3333 useless extension candidates. Maximal degree in co-relation 23776. Up to 2654 conditions per place. [2024-06-28 00:05:35,501 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 307 selfloop transitions, 31 changer transitions 0/347 dead transitions. [2024-06-28 00:05:35,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 347 transitions, 7075 flow [2024-06-28 00:05:35,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:05:35,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:05:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-28 00:05:35,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-28 00:05:35,502 INFO L175 Difference]: Start difference. First operand has 326 places, 330 transitions, 6361 flow. Second operand 7 states and 138 transitions. [2024-06-28 00:05:35,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 347 transitions, 7075 flow [2024-06-28 00:05:36,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 347 transitions, 6740 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 00:05:36,413 INFO L231 Difference]: Finished difference. Result has 327 places, 330 transitions, 6094 flow [2024-06-28 00:05:36,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6026, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6094, PETRI_PLACES=327, PETRI_TRANSITIONS=330} [2024-06-28 00:05:36,413 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-28 00:05:36,414 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 330 transitions, 6094 flow [2024-06-28 00:05:36,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:36,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:36,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:36,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 00:05:36,414 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:36,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:36,414 INFO L85 PathProgramCache]: Analyzing trace with hash 620065247, now seen corresponding path program 10 times [2024-06-28 00:05:36,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:36,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166255349] [2024-06-28 00:05:36,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:36,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:36,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:36,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166255349] [2024-06-28 00:05:36,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166255349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:36,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:36,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:36,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90569876] [2024-06-28 00:05:36,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:36,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:36,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:36,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:36,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:36,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:36,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 330 transitions, 6094 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:36,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:36,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:36,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:37,801 INFO L124 PetriNetUnfolderBase]: 1830/3419 cut-off events. [2024-06-28 00:05:37,802 INFO L125 PetriNetUnfolderBase]: For 209777/209826 co-relation queries the response was YES. [2024-06-28 00:05:37,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23074 conditions, 3419 events. 1830/3419 cut-off events. For 209777/209826 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 24499 event pairs, 400 based on Foata normal form. 27/3366 useless extension candidates. Maximal degree in co-relation 22940. Up to 2402 conditions per place. [2024-06-28 00:05:37,853 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 214 selfloop transitions, 125 changer transitions 0/348 dead transitions. [2024-06-28 00:05:37,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 348 transitions, 6822 flow [2024-06-28 00:05:37,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:05:37,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:05:37,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-28 00:05:37,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 00:05:37,854 INFO L175 Difference]: Start difference. First operand has 327 places, 330 transitions, 6094 flow. Second operand 7 states and 147 transitions. [2024-06-28 00:05:37,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 348 transitions, 6822 flow [2024-06-28 00:05:38,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 348 transitions, 6665 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-28 00:05:38,676 INFO L231 Difference]: Finished difference. Result has 324 places, 330 transitions, 6198 flow [2024-06-28 00:05:38,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5937, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6198, PETRI_PLACES=324, PETRI_TRANSITIONS=330} [2024-06-28 00:05:38,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-28 00:05:38,677 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 330 transitions, 6198 flow [2024-06-28 00:05:38,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:38,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:38,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:38,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 00:05:38,677 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:38,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:38,678 INFO L85 PathProgramCache]: Analyzing trace with hash 620058334, now seen corresponding path program 20 times [2024-06-28 00:05:38,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:38,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531501866] [2024-06-28 00:05:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:38,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:38,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:38,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531501866] [2024-06-28 00:05:38,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531501866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:38,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:38,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:38,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397459043] [2024-06-28 00:05:38,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:38,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:38,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:38,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:38,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:38,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:38,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 330 transitions, 6198 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:38,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:38,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:38,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:39,806 INFO L124 PetriNetUnfolderBase]: 1838/3395 cut-off events. [2024-06-28 00:05:39,806 INFO L125 PetriNetUnfolderBase]: For 206720/206757 co-relation queries the response was YES. [2024-06-28 00:05:39,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23234 conditions, 3395 events. 1838/3395 cut-off events. For 206720/206757 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 24199 event pairs, 545 based on Foata normal form. 10/3285 useless extension candidates. Maximal degree in co-relation 23102. Up to 1309 conditions per place. [2024-06-28 00:05:39,853 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 187 selfloop transitions, 155 changer transitions 0/351 dead transitions. [2024-06-28 00:05:39,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 351 transitions, 7311 flow [2024-06-28 00:05:39,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:05:39,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:05:39,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 00:05:39,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-28 00:05:39,854 INFO L175 Difference]: Start difference. First operand has 324 places, 330 transitions, 6198 flow. Second operand 8 states and 160 transitions. [2024-06-28 00:05:39,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 351 transitions, 7311 flow [2024-06-28 00:05:40,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 351 transitions, 6910 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-28 00:05:40,582 INFO L231 Difference]: Finished difference. Result has 323 places, 332 transitions, 6191 flow [2024-06-28 00:05:40,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5801, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6191, PETRI_PLACES=323, PETRI_TRANSITIONS=332} [2024-06-28 00:05:40,583 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-28 00:05:40,583 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 332 transitions, 6191 flow [2024-06-28 00:05:40,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:40,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:40,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:40,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 00:05:40,585 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:40,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:40,585 INFO L85 PathProgramCache]: Analyzing trace with hash -437277970, now seen corresponding path program 21 times [2024-06-28 00:05:40,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:40,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022677500] [2024-06-28 00:05:40,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:40,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:40,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:40,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:40,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022677500] [2024-06-28 00:05:40,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022677500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:40,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:40,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:40,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610015222] [2024-06-28 00:05:40,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:40,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:40,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:40,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:40,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:40,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:40,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 332 transitions, 6191 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:40,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:40,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:40,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:41,890 INFO L124 PetriNetUnfolderBase]: 1833/3395 cut-off events. [2024-06-28 00:05:41,890 INFO L125 PetriNetUnfolderBase]: For 199305/199342 co-relation queries the response was YES. [2024-06-28 00:05:41,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22866 conditions, 3395 events. 1833/3395 cut-off events. For 199305/199342 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 24262 event pairs, 547 based on Foata normal form. 10/3286 useless extension candidates. Maximal degree in co-relation 22735. Up to 1307 conditions per place. [2024-06-28 00:05:41,926 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 187 selfloop transitions, 154 changer transitions 0/350 dead transitions. [2024-06-28 00:05:41,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 350 transitions, 7069 flow [2024-06-28 00:05:41,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:05:41,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:05:41,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 00:05:41,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-28 00:05:41,927 INFO L175 Difference]: Start difference. First operand has 323 places, 332 transitions, 6191 flow. Second operand 8 states and 160 transitions. [2024-06-28 00:05:41,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 350 transitions, 7069 flow [2024-06-28 00:05:42,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 350 transitions, 6528 flow, removed 61 selfloop flow, removed 8 redundant places. [2024-06-28 00:05:42,704 INFO L231 Difference]: Finished difference. Result has 323 places, 332 transitions, 5963 flow [2024-06-28 00:05:42,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5650, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5963, PETRI_PLACES=323, PETRI_TRANSITIONS=332} [2024-06-28 00:05:42,706 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-28 00:05:42,706 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 332 transitions, 5963 flow [2024-06-28 00:05:42,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:42,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:42,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:42,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 00:05:42,706 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:42,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:42,706 INFO L85 PathProgramCache]: Analyzing trace with hash 953523124, now seen corresponding path program 1 times [2024-06-28 00:05:42,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:42,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440719243] [2024-06-28 00:05:42,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:42,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:43,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:43,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440719243] [2024-06-28 00:05:43,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440719243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:43,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:43,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:05:43,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859585808] [2024-06-28 00:05:43,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:43,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:05:43,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:43,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:05:43,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:05:43,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:43,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 332 transitions, 5963 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:43,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:43,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:43,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:44,020 INFO L124 PetriNetUnfolderBase]: 1893/3526 cut-off events. [2024-06-28 00:05:44,020 INFO L125 PetriNetUnfolderBase]: For 212531/212537 co-relation queries the response was YES. [2024-06-28 00:05:44,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22975 conditions, 3526 events. 1893/3526 cut-off events. For 212531/212537 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 25232 event pairs, 345 based on Foata normal form. 5/3451 useless extension candidates. Maximal degree in co-relation 22844. Up to 2468 conditions per place. [2024-06-28 00:05:44,076 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 326 selfloop transitions, 41 changer transitions 0/376 dead transitions. [2024-06-28 00:05:44,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 376 transitions, 7059 flow [2024-06-28 00:05:44,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:05:44,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:05:44,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-28 00:05:44,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2024-06-28 00:05:44,077 INFO L175 Difference]: Start difference. First operand has 323 places, 332 transitions, 5963 flow. Second operand 8 states and 177 transitions. [2024-06-28 00:05:44,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 376 transitions, 7059 flow [2024-06-28 00:05:44,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 376 transitions, 6738 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 00:05:44,964 INFO L231 Difference]: Finished difference. Result has 326 places, 339 transitions, 5871 flow [2024-06-28 00:05:44,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5642, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5871, PETRI_PLACES=326, PETRI_TRANSITIONS=339} [2024-06-28 00:05:44,965 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-28 00:05:44,965 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 339 transitions, 5871 flow [2024-06-28 00:05:44,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:44,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:44,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:44,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 00:05:44,965 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:44,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:44,966 INFO L85 PathProgramCache]: Analyzing trace with hash 453787942, now seen corresponding path program 1 times [2024-06-28 00:05:44,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:44,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722523056] [2024-06-28 00:05:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:44,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:45,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:45,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722523056] [2024-06-28 00:05:45,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722523056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:45,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:45,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:05:45,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20163749] [2024-06-28 00:05:45,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:45,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:05:45,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:45,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:05:45,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:05:45,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:45,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 339 transitions, 5871 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:45,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:45,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:45,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:46,387 INFO L124 PetriNetUnfolderBase]: 1905/3508 cut-off events. [2024-06-28 00:05:46,387 INFO L125 PetriNetUnfolderBase]: For 205129/205129 co-relation queries the response was YES. [2024-06-28 00:05:46,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22978 conditions, 3508 events. 1905/3508 cut-off events. For 205129/205129 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 24923 event pairs, 316 based on Foata normal form. 4/3440 useless extension candidates. Maximal degree in co-relation 22844. Up to 2348 conditions per place. [2024-06-28 00:05:46,436 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 269 selfloop transitions, 93 changer transitions 2/373 dead transitions. [2024-06-28 00:05:46,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 373 transitions, 6872 flow [2024-06-28 00:05:46,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:05:46,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:05:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-28 00:05:46,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-28 00:05:46,437 INFO L175 Difference]: Start difference. First operand has 326 places, 339 transitions, 5871 flow. Second operand 7 states and 163 transitions. [2024-06-28 00:05:46,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 373 transitions, 6872 flow [2024-06-28 00:05:47,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 373 transitions, 6713 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-28 00:05:47,538 INFO L231 Difference]: Finished difference. Result has 327 places, 338 transitions, 5895 flow [2024-06-28 00:05:47,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5712, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5895, PETRI_PLACES=327, PETRI_TRANSITIONS=338} [2024-06-28 00:05:47,538 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-28 00:05:47,538 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 338 transitions, 5895 flow [2024-06-28 00:05:47,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:47,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:47,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:47,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 00:05:47,539 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:47,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:47,539 INFO L85 PathProgramCache]: Analyzing trace with hash 817545554, now seen corresponding path program 2 times [2024-06-28 00:05:47,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:47,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983555375] [2024-06-28 00:05:47,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:47,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:47,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:47,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983555375] [2024-06-28 00:05:47,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983555375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:47,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:47,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:05:47,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323828898] [2024-06-28 00:05:47,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:47,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:05:47,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:47,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:05:47,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:05:47,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:47,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 338 transitions, 5895 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:47,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:47,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:47,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:48,861 INFO L124 PetriNetUnfolderBase]: 1901/3520 cut-off events. [2024-06-28 00:05:48,862 INFO L125 PetriNetUnfolderBase]: For 221388/221394 co-relation queries the response was YES. [2024-06-28 00:05:48,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22931 conditions, 3520 events. 1901/3520 cut-off events. For 221388/221394 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 25165 event pairs, 305 based on Foata normal form. 5/3425 useless extension candidates. Maximal degree in co-relation 22796. Up to 2348 conditions per place. [2024-06-28 00:05:48,908 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 262 selfloop transitions, 94 changer transitions 5/370 dead transitions. [2024-06-28 00:05:48,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 370 transitions, 6884 flow [2024-06-28 00:05:48,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:05:48,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:05:48,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-28 00:05:48,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052910052910053 [2024-06-28 00:05:48,909 INFO L175 Difference]: Start difference. First operand has 327 places, 338 transitions, 5895 flow. Second operand 9 states and 191 transitions. [2024-06-28 00:05:48,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 370 transitions, 6884 flow [2024-06-28 00:05:49,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 370 transitions, 6763 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 00:05:49,982 INFO L231 Difference]: Finished difference. Result has 332 places, 334 transitions, 5919 flow [2024-06-28 00:05:49,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5775, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5919, PETRI_PLACES=332, PETRI_TRANSITIONS=334} [2024-06-28 00:05:49,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-28 00:05:49,983 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 334 transitions, 5919 flow [2024-06-28 00:05:49,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:49,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:49,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:49,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 00:05:49,983 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:49,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:49,984 INFO L85 PathProgramCache]: Analyzing trace with hash -82568558, now seen corresponding path program 3 times [2024-06-28 00:05:49,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:49,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585507085] [2024-06-28 00:05:49,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:49,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:50,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:50,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585507085] [2024-06-28 00:05:50,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585507085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:50,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:50,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:05:50,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795154979] [2024-06-28 00:05:50,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:50,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:05:50,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:50,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:05:50,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:05:50,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:50,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 334 transitions, 5919 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:50,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:50,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:50,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:51,375 INFO L124 PetriNetUnfolderBase]: 1885/3500 cut-off events. [2024-06-28 00:05:51,375 INFO L125 PetriNetUnfolderBase]: For 226103/226103 co-relation queries the response was YES. [2024-06-28 00:05:51,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22986 conditions, 3500 events. 1885/3500 cut-off events. For 226103/226103 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 24961 event pairs, 294 based on Foata normal form. 4/3422 useless extension candidates. Maximal degree in co-relation 22850. Up to 2356 conditions per place. [2024-06-28 00:05:51,420 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 262 selfloop transitions, 104 changer transitions 7/382 dead transitions. [2024-06-28 00:05:51,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 382 transitions, 7033 flow [2024-06-28 00:05:51,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:05:51,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:05:51,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-28 00:05:51,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512987012987013 [2024-06-28 00:05:51,421 INFO L175 Difference]: Start difference. First operand has 332 places, 334 transitions, 5919 flow. Second operand 11 states and 237 transitions. [2024-06-28 00:05:51,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 382 transitions, 7033 flow [2024-06-28 00:05:52,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 382 transitions, 6831 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 00:05:52,670 INFO L231 Difference]: Finished difference. Result has 336 places, 332 transitions, 5950 flow [2024-06-28 00:05:52,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5725, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5950, PETRI_PLACES=336, PETRI_TRANSITIONS=332} [2024-06-28 00:05:52,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-28 00:05:52,671 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 332 transitions, 5950 flow [2024-06-28 00:05:52,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:52,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:52,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:52,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 00:05:52,672 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:52,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:52,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1601474404, now seen corresponding path program 4 times [2024-06-28 00:05:52,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:52,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187161564] [2024-06-28 00:05:52,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:52,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:52,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:52,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187161564] [2024-06-28 00:05:52,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187161564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:52,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:52,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:05:52,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900454866] [2024-06-28 00:05:52,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:52,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:05:52,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:52,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:05:52,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:05:52,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:52,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 332 transitions, 5950 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:52,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:52,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:52,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:54,021 INFO L124 PetriNetUnfolderBase]: 1841/3426 cut-off events. [2024-06-28 00:05:54,021 INFO L125 PetriNetUnfolderBase]: For 217104/217110 co-relation queries the response was YES. [2024-06-28 00:05:54,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22289 conditions, 3426 events. 1841/3426 cut-off events. For 217104/217110 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 24439 event pairs, 309 based on Foata normal form. 5/3329 useless extension candidates. Maximal degree in co-relation 22152. Up to 2344 conditions per place. [2024-06-28 00:05:54,065 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 237 selfloop transitions, 108 changer transitions 7/361 dead transitions. [2024-06-28 00:05:54,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 361 transitions, 6724 flow [2024-06-28 00:05:54,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:05:54,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:05:54,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-28 00:05:54,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947089947089947 [2024-06-28 00:05:54,066 INFO L175 Difference]: Start difference. First operand has 336 places, 332 transitions, 5950 flow. Second operand 9 states and 187 transitions. [2024-06-28 00:05:54,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 361 transitions, 6724 flow [2024-06-28 00:05:55,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 361 transitions, 6182 flow, removed 9 selfloop flow, removed 15 redundant places. [2024-06-28 00:05:55,209 INFO L231 Difference]: Finished difference. Result has 330 places, 326 transitions, 5564 flow [2024-06-28 00:05:55,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5408, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5564, PETRI_PLACES=330, PETRI_TRANSITIONS=326} [2024-06-28 00:05:55,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-28 00:05:55,210 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 326 transitions, 5564 flow [2024-06-28 00:05:55,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:55,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:55,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:55,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 00:05:55,210 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:55,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:55,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1327730702, now seen corresponding path program 2 times [2024-06-28 00:05:55,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:55,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219373202] [2024-06-28 00:05:55,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:55,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:55,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:55,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219373202] [2024-06-28 00:05:55,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219373202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:55,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:55,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:05:55,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943754097] [2024-06-28 00:05:55,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:55,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:05:55,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:55,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:05:55,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:05:55,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:55,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 326 transitions, 5564 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:55,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:55,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:55,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:56,486 INFO L124 PetriNetUnfolderBase]: 1833/3456 cut-off events. [2024-06-28 00:05:56,486 INFO L125 PetriNetUnfolderBase]: For 235463/235469 co-relation queries the response was YES. [2024-06-28 00:05:56,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22261 conditions, 3456 events. 1833/3456 cut-off events. For 235463/235469 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 25004 event pairs, 283 based on Foata normal form. 5/3389 useless extension candidates. Maximal degree in co-relation 22126. Up to 2170 conditions per place. [2024-06-28 00:05:56,528 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 318 selfloop transitions, 39 changer transitions 0/366 dead transitions. [2024-06-28 00:05:56,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 366 transitions, 6627 flow [2024-06-28 00:05:56,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:05:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:05:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-28 00:05:56,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-28 00:05:56,529 INFO L175 Difference]: Start difference. First operand has 330 places, 326 transitions, 5564 flow. Second operand 9 states and 183 transitions. [2024-06-28 00:05:56,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 366 transitions, 6627 flow [2024-06-28 00:05:57,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 366 transitions, 6341 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-28 00:05:57,561 INFO L231 Difference]: Finished difference. Result has 328 places, 328 transitions, 5446 flow [2024-06-28 00:05:57,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5282, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5446, PETRI_PLACES=328, PETRI_TRANSITIONS=328} [2024-06-28 00:05:57,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-28 00:05:57,562 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 328 transitions, 5446 flow [2024-06-28 00:05:57,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:57,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:57,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:57,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 00:05:57,563 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:05:57,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:57,563 INFO L85 PathProgramCache]: Analyzing trace with hash -52019146, now seen corresponding path program 3 times [2024-06-28 00:05:57,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:57,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279036854] [2024-06-28 00:05:57,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:57,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:57,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:57,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279036854] [2024-06-28 00:05:57,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279036854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:57,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:57,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:57,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343745792] [2024-06-28 00:05:57,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:57,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:57,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:57,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:57,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:57,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:05:57,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 328 transitions, 5446 flow. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:05:57,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:57,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:05:57,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:58,793 INFO L124 PetriNetUnfolderBase]: 1913/3610 cut-off events. [2024-06-28 00:05:58,793 INFO L125 PetriNetUnfolderBase]: For 289311/289317 co-relation queries the response was YES. [2024-06-28 00:05:58,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24216 conditions, 3610 events. 1913/3610 cut-off events. For 289311/289317 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 26349 event pairs, 336 based on Foata normal form. 5/3545 useless extension candidates. Maximal degree in co-relation 24082. Up to 1562 conditions per place. [2024-06-28 00:05:58,841 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 253 selfloop transitions, 101 changer transitions 0/363 dead transitions. [2024-06-28 00:05:58,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 363 transitions, 6753 flow [2024-06-28 00:05:58,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:05:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:05:58,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-28 00:05:58,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-28 00:05:58,842 INFO L175 Difference]: Start difference. First operand has 328 places, 328 transitions, 5446 flow. Second operand 8 states and 164 transitions. [2024-06-28 00:05:58,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 363 transitions, 6753 flow [2024-06-28 00:06:00,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 363 transitions, 6596 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-28 00:06:00,020 INFO L231 Difference]: Finished difference. Result has 330 places, 329 transitions, 5557 flow [2024-06-28 00:06:00,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5289, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5557, PETRI_PLACES=330, PETRI_TRANSITIONS=329} [2024-06-28 00:06:00,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-28 00:06:00,022 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 329 transitions, 5557 flow [2024-06-28 00:06:00,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:06:00,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:00,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:00,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 00:06:00,023 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:00,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:00,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1327610546, now seen corresponding path program 5 times [2024-06-28 00:06:00,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:00,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576874908] [2024-06-28 00:06:00,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:00,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:00,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:00,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576874908] [2024-06-28 00:06:00,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576874908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:00,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:00,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:06:00,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616271987] [2024-06-28 00:06:00,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:00,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:06:00,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:00,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:06:00,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:06:00,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:00,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 329 transitions, 5557 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:00,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:00,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:00,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:01,437 INFO L124 PetriNetUnfolderBase]: 1925/3594 cut-off events. [2024-06-28 00:06:01,437 INFO L125 PetriNetUnfolderBase]: For 296445/296445 co-relation queries the response was YES. [2024-06-28 00:06:01,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24378 conditions, 3594 events. 1925/3594 cut-off events. For 296445/296445 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25904 event pairs, 398 based on Foata normal form. 4/3525 useless extension candidates. Maximal degree in co-relation 24244. Up to 2137 conditions per place. [2024-06-28 00:06:01,480 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 263 selfloop transitions, 104 changer transitions 0/376 dead transitions. [2024-06-28 00:06:01,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 376 transitions, 6763 flow [2024-06-28 00:06:01,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:06:01,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:06:01,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-28 00:06:01,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423280423280423 [2024-06-28 00:06:01,481 INFO L175 Difference]: Start difference. First operand has 330 places, 329 transitions, 5557 flow. Second operand 9 states and 205 transitions. [2024-06-28 00:06:01,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 376 transitions, 6763 flow [2024-06-28 00:06:02,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 376 transitions, 6505 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-28 00:06:02,683 INFO L231 Difference]: Finished difference. Result has 333 places, 330 transitions, 5530 flow [2024-06-28 00:06:02,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5299, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5530, PETRI_PLACES=333, PETRI_TRANSITIONS=330} [2024-06-28 00:06:02,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-28 00:06:02,683 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 330 transitions, 5530 flow [2024-06-28 00:06:02,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:02,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:02,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:02,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-28 00:06:02,683 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:02,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:02,684 INFO L85 PathProgramCache]: Analyzing trace with hash 984672502, now seen corresponding path program 4 times [2024-06-28 00:06:02,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:02,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074406775] [2024-06-28 00:06:02,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:02,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:02,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:02,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:02,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074406775] [2024-06-28 00:06:02,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074406775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:02,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:02,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:06:02,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588278329] [2024-06-28 00:06:02,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:02,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:06:02,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:02,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:06:02,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:06:03,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:03,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 330 transitions, 5530 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:03,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:03,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:03,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:04,062 INFO L124 PetriNetUnfolderBase]: 1993/3802 cut-off events. [2024-06-28 00:06:04,062 INFO L125 PetriNetUnfolderBase]: For 334264/334270 co-relation queries the response was YES. [2024-06-28 00:06:04,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25777 conditions, 3802 events. 1993/3802 cut-off events. For 334264/334270 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 28540 event pairs, 295 based on Foata normal form. 5/3731 useless extension candidates. Maximal degree in co-relation 25642. Up to 2022 conditions per place. [2024-06-28 00:06:04,112 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 315 selfloop transitions, 52 changer transitions 0/376 dead transitions. [2024-06-28 00:06:04,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 376 transitions, 6916 flow [2024-06-28 00:06:04,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:06:04,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:06:04,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-28 00:06:04,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-28 00:06:04,113 INFO L175 Difference]: Start difference. First operand has 333 places, 330 transitions, 5530 flow. Second operand 10 states and 204 transitions. [2024-06-28 00:06:04,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 376 transitions, 6916 flow [2024-06-28 00:06:05,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 376 transitions, 6716 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 00:06:05,354 INFO L231 Difference]: Finished difference. Result has 338 places, 333 transitions, 5550 flow [2024-06-28 00:06:05,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5332, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5550, PETRI_PLACES=338, PETRI_TRANSITIONS=333} [2024-06-28 00:06:05,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-28 00:06:05,354 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 333 transitions, 5550 flow [2024-06-28 00:06:05,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:05,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:05,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:05,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-28 00:06:05,355 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:05,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:05,355 INFO L85 PathProgramCache]: Analyzing trace with hash 120679064, now seen corresponding path program 5 times [2024-06-28 00:06:05,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:05,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320088424] [2024-06-28 00:06:05,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:05,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:05,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:05,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320088424] [2024-06-28 00:06:05,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320088424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:05,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:05,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:06:05,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104450872] [2024-06-28 00:06:05,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:05,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:06:05,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:05,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:06:05,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:06:05,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:05,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 333 transitions, 5550 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:05,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:05,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:05,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:06,567 INFO L124 PetriNetUnfolderBase]: 1985/3798 cut-off events. [2024-06-28 00:06:06,568 INFO L125 PetriNetUnfolderBase]: For 326861/326867 co-relation queries the response was YES. [2024-06-28 00:06:06,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25407 conditions, 3798 events. 1985/3798 cut-off events. For 326861/326867 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 28533 event pairs, 293 based on Foata normal form. 5/3723 useless extension candidates. Maximal degree in co-relation 25270. Up to 2022 conditions per place. [2024-06-28 00:06:06,614 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 306 selfloop transitions, 53 changer transitions 0/368 dead transitions. [2024-06-28 00:06:06,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 368 transitions, 6818 flow [2024-06-28 00:06:06,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:06:06,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:06:06,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-28 00:06:06,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-28 00:06:06,615 INFO L175 Difference]: Start difference. First operand has 338 places, 333 transitions, 5550 flow. Second operand 9 states and 184 transitions. [2024-06-28 00:06:06,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 368 transitions, 6818 flow [2024-06-28 00:06:07,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 368 transitions, 6665 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-28 00:06:07,835 INFO L231 Difference]: Finished difference. Result has 342 places, 335 transitions, 5638 flow [2024-06-28 00:06:07,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5397, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5638, PETRI_PLACES=342, PETRI_TRANSITIONS=335} [2024-06-28 00:06:07,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-28 00:06:07,835 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 335 transitions, 5638 flow [2024-06-28 00:06:07,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:07,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:07,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:07,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-28 00:06:07,836 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:07,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:07,836 INFO L85 PathProgramCache]: Analyzing trace with hash -47370820, now seen corresponding path program 6 times [2024-06-28 00:06:07,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:07,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23411353] [2024-06-28 00:06:07,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:07,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:08,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:08,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23411353] [2024-06-28 00:06:08,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23411353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:08,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:08,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:06:08,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466403027] [2024-06-28 00:06:08,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:08,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:06:08,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:08,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:06:08,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:06:08,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:08,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 335 transitions, 5638 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:08,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:08,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:08,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:09,118 INFO L124 PetriNetUnfolderBase]: 2033/3882 cut-off events. [2024-06-28 00:06:09,118 INFO L125 PetriNetUnfolderBase]: For 377637/377643 co-relation queries the response was YES. [2024-06-28 00:06:09,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25983 conditions, 3882 events. 2033/3882 cut-off events. For 377637/377643 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 29212 event pairs, 263 based on Foata normal form. 13/3807 useless extension candidates. Maximal degree in co-relation 25846. Up to 1475 conditions per place. [2024-06-28 00:06:09,166 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 247 selfloop transitions, 127 changer transitions 6/389 dead transitions. [2024-06-28 00:06:09,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 389 transitions, 7246 flow [2024-06-28 00:06:09,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 00:06:09,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 00:06:09,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 264 transitions. [2024-06-28 00:06:09,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-28 00:06:09,167 INFO L175 Difference]: Start difference. First operand has 342 places, 335 transitions, 5638 flow. Second operand 13 states and 264 transitions. [2024-06-28 00:06:09,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 389 transitions, 7246 flow [2024-06-28 00:06:10,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 389 transitions, 7112 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-28 00:06:10,300 INFO L231 Difference]: Finished difference. Result has 350 places, 334 transitions, 5768 flow [2024-06-28 00:06:10,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5504, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5768, PETRI_PLACES=350, PETRI_TRANSITIONS=334} [2024-06-28 00:06:10,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-28 00:06:10,301 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 334 transitions, 5768 flow [2024-06-28 00:06:10,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:10,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:10,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:10,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-28 00:06:10,301 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:10,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:10,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1161496922, now seen corresponding path program 6 times [2024-06-28 00:06:10,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:10,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838289133] [2024-06-28 00:06:10,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:10,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:10,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:10,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838289133] [2024-06-28 00:06:10,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838289133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:10,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:10,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:06:10,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891902100] [2024-06-28 00:06:10,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:10,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:06:10,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:10,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:06:10,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:06:10,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:10,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 334 transitions, 5768 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:10,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:10,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:10,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:11,512 INFO L124 PetriNetUnfolderBase]: 1957/3734 cut-off events. [2024-06-28 00:06:11,512 INFO L125 PetriNetUnfolderBase]: For 344473/344479 co-relation queries the response was YES. [2024-06-28 00:06:11,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25311 conditions, 3734 events. 1957/3734 cut-off events. For 344473/344479 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 27831 event pairs, 317 based on Foata normal form. 5/3659 useless extension candidates. Maximal degree in co-relation 25172. Up to 2406 conditions per place. [2024-06-28 00:06:11,558 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 320 selfloop transitions, 42 changer transitions 0/371 dead transitions. [2024-06-28 00:06:11,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 371 transitions, 6758 flow [2024-06-28 00:06:11,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:06:11,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:06:11,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-28 00:06:11,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-28 00:06:11,559 INFO L175 Difference]: Start difference. First operand has 350 places, 334 transitions, 5768 flow. Second operand 9 states and 183 transitions. [2024-06-28 00:06:11,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 371 transitions, 6758 flow [2024-06-28 00:06:12,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 371 transitions, 6447 flow, removed 37 selfloop flow, removed 12 redundant places. [2024-06-28 00:06:12,754 INFO L231 Difference]: Finished difference. Result has 344 places, 334 transitions, 5547 flow [2024-06-28 00:06:12,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5459, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5547, PETRI_PLACES=344, PETRI_TRANSITIONS=334} [2024-06-28 00:06:12,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-28 00:06:12,754 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 334 transitions, 5547 flow [2024-06-28 00:06:12,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:12,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:12,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:12,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-28 00:06:12,755 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:12,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:12,755 INFO L85 PathProgramCache]: Analyzing trace with hash -47377516, now seen corresponding path program 7 times [2024-06-28 00:06:12,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:12,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794156831] [2024-06-28 00:06:12,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:12,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:13,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:13,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794156831] [2024-06-28 00:06:13,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794156831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:13,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:13,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:06:13,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828219094] [2024-06-28 00:06:13,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:13,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:06:13,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:13,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:06:13,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:06:13,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:13,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 334 transitions, 5547 flow. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:06:13,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:13,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:13,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:13,877 INFO L124 PetriNetUnfolderBase]: 1989/3818 cut-off events. [2024-06-28 00:06:13,878 INFO L125 PetriNetUnfolderBase]: For 368701/368707 co-relation queries the response was YES. [2024-06-28 00:06:13,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25831 conditions, 3818 events. 1989/3818 cut-off events. For 368701/368707 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 28774 event pairs, 348 based on Foata normal form. 5/3717 useless extension candidates. Maximal degree in co-relation 25694. Up to 1562 conditions per place. [2024-06-28 00:06:13,924 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 255 selfloop transitions, 98 changer transitions 0/362 dead transitions. [2024-06-28 00:06:13,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 362 transitions, 6855 flow [2024-06-28 00:06:13,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:06:13,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:06:13,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-28 00:06:13,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-28 00:06:13,925 INFO L175 Difference]: Start difference. First operand has 344 places, 334 transitions, 5547 flow. Second operand 8 states and 158 transitions. [2024-06-28 00:06:13,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 362 transitions, 6855 flow [2024-06-28 00:06:15,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 362 transitions, 6729 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-28 00:06:15,109 INFO L231 Difference]: Finished difference. Result has 345 places, 336 transitions, 5766 flow [2024-06-28 00:06:15,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5421, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5766, PETRI_PLACES=345, PETRI_TRANSITIONS=336} [2024-06-28 00:06:15,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-28 00:06:15,109 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 336 transitions, 5766 flow [2024-06-28 00:06:15,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:06:15,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:15,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:15,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-28 00:06:15,109 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:15,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:15,110 INFO L85 PathProgramCache]: Analyzing trace with hash 124045850, now seen corresponding path program 7 times [2024-06-28 00:06:15,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:15,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826224158] [2024-06-28 00:06:15,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:15,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:15,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:15,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:15,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826224158] [2024-06-28 00:06:15,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826224158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:15,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:15,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:06:15,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062677607] [2024-06-28 00:06:15,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:15,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:06:15,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:15,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:06:15,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:06:15,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:15,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 336 transitions, 5766 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:15,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:15,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:15,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:16,305 INFO L124 PetriNetUnfolderBase]: 1981/3762 cut-off events. [2024-06-28 00:06:16,305 INFO L125 PetriNetUnfolderBase]: For 362528/362528 co-relation queries the response was YES. [2024-06-28 00:06:16,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25703 conditions, 3762 events. 1981/3762 cut-off events. For 362528/362528 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 27969 event pairs, 386 based on Foata normal form. 4/3691 useless extension candidates. Maximal degree in co-relation 25564. Up to 2221 conditions per place. [2024-06-28 00:06:16,353 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 260 selfloop transitions, 118 changer transitions 0/387 dead transitions. [2024-06-28 00:06:16,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 387 transitions, 7010 flow [2024-06-28 00:06:16,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:06:16,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:06:16,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-28 00:06:16,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-28 00:06:16,355 INFO L175 Difference]: Start difference. First operand has 345 places, 336 transitions, 5766 flow. Second operand 10 states and 224 transitions. [2024-06-28 00:06:16,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 387 transitions, 7010 flow [2024-06-28 00:06:17,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 387 transitions, 6765 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-28 00:06:17,521 INFO L231 Difference]: Finished difference. Result has 350 places, 336 transitions, 5762 flow [2024-06-28 00:06:17,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5521, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5762, PETRI_PLACES=350, PETRI_TRANSITIONS=336} [2024-06-28 00:06:17,521 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-28 00:06:17,521 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 336 transitions, 5762 flow [2024-06-28 00:06:17,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:17,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:17,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:17,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-28 00:06:17,522 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:17,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:17,522 INFO L85 PathProgramCache]: Analyzing trace with hash -2066942322, now seen corresponding path program 8 times [2024-06-28 00:06:17,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:17,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091125312] [2024-06-28 00:06:17,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:17,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:17,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:17,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:17,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091125312] [2024-06-28 00:06:17,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091125312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:17,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:17,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:06:17,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903611891] [2024-06-28 00:06:17,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:17,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:06:17,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:17,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:06:17,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:06:17,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:17,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 336 transitions, 5762 flow. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:06:17,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:17,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:17,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:18,676 INFO L124 PetriNetUnfolderBase]: 2041/3912 cut-off events. [2024-06-28 00:06:18,677 INFO L125 PetriNetUnfolderBase]: For 412983/412989 co-relation queries the response was YES. [2024-06-28 00:06:18,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27266 conditions, 3912 events. 2041/3912 cut-off events. For 412983/412989 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 29664 event pairs, 328 based on Foata normal form. 5/3828 useless extension candidates. Maximal degree in co-relation 27126. Up to 1687 conditions per place. [2024-06-28 00:06:18,730 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 241 selfloop transitions, 117 changer transitions 0/367 dead transitions. [2024-06-28 00:06:18,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 367 transitions, 6809 flow [2024-06-28 00:06:18,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:06:18,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:06:18,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-28 00:06:18,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-28 00:06:18,731 INFO L175 Difference]: Start difference. First operand has 350 places, 336 transitions, 5762 flow. Second operand 8 states and 162 transitions. [2024-06-28 00:06:18,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 367 transitions, 6809 flow [2024-06-28 00:06:19,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 367 transitions, 6546 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-28 00:06:19,962 INFO L231 Difference]: Finished difference. Result has 351 places, 336 transitions, 5737 flow [2024-06-28 00:06:19,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5499, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5737, PETRI_PLACES=351, PETRI_TRANSITIONS=336} [2024-06-28 00:06:19,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-28 00:06:19,963 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 336 transitions, 5737 flow [2024-06-28 00:06:19,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:06:19,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:19,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:19,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-28 00:06:19,963 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:19,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:19,963 INFO L85 PathProgramCache]: Analyzing trace with hash 124403900, now seen corresponding path program 8 times [2024-06-28 00:06:19,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:19,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268434001] [2024-06-28 00:06:19,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:19,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:20,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:20,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268434001] [2024-06-28 00:06:20,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268434001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:20,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:20,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:06:20,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059873410] [2024-06-28 00:06:20,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:20,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:06:20,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:20,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:06:20,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:06:20,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:20,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 336 transitions, 5737 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:20,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:20,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:20,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:21,232 INFO L124 PetriNetUnfolderBase]: 2053/3924 cut-off events. [2024-06-28 00:06:21,232 INFO L125 PetriNetUnfolderBase]: For 421429/421429 co-relation queries the response was YES. [2024-06-28 00:06:21,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27359 conditions, 3924 events. 2053/3924 cut-off events. For 421429/421429 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 29704 event pairs, 380 based on Foata normal form. 4/3840 useless extension candidates. Maximal degree in co-relation 27218. Up to 2333 conditions per place. [2024-06-28 00:06:21,279 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 259 selfloop transitions, 119 changer transitions 0/387 dead transitions. [2024-06-28 00:06:21,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 387 transitions, 6818 flow [2024-06-28 00:06:21,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:06:21,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:06:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 252 transitions. [2024-06-28 00:06:21,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 00:06:21,280 INFO L175 Difference]: Start difference. First operand has 351 places, 336 transitions, 5737 flow. Second operand 12 states and 252 transitions. [2024-06-28 00:06:21,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 387 transitions, 6818 flow [2024-06-28 00:06:22,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 387 transitions, 6559 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-28 00:06:22,528 INFO L231 Difference]: Finished difference. Result has 356 places, 337 transitions, 5739 flow [2024-06-28 00:06:22,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5478, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5739, PETRI_PLACES=356, PETRI_TRANSITIONS=337} [2024-06-28 00:06:22,529 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-28 00:06:22,529 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 337 transitions, 5739 flow [2024-06-28 00:06:22,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:22,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:22,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:22,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-28 00:06:22,529 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:22,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:22,529 INFO L85 PathProgramCache]: Analyzing trace with hash 988713352, now seen corresponding path program 9 times [2024-06-28 00:06:22,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:22,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557538105] [2024-06-28 00:06:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:22,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:22,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:22,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557538105] [2024-06-28 00:06:22,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557538105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:22,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:22,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:06:22,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497389578] [2024-06-28 00:06:22,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:22,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:06:22,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:22,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:06:22,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:06:22,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:22,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 337 transitions, 5739 flow. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:06:22,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:22,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:22,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:23,679 INFO L124 PetriNetUnfolderBase]: 2037/3912 cut-off events. [2024-06-28 00:06:23,680 INFO L125 PetriNetUnfolderBase]: For 385404/385410 co-relation queries the response was YES. [2024-06-28 00:06:23,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26386 conditions, 3912 events. 2037/3912 cut-off events. For 385404/385410 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 29685 event pairs, 348 based on Foata normal form. 5/3838 useless extension candidates. Maximal degree in co-relation 26244. Up to 2338 conditions per place. [2024-06-28 00:06:23,730 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 256 selfloop transitions, 101 changer transitions 0/366 dead transitions. [2024-06-28 00:06:23,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 366 transitions, 6849 flow [2024-06-28 00:06:23,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:06:23,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:06:23,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-28 00:06:23,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-28 00:06:23,731 INFO L175 Difference]: Start difference. First operand has 356 places, 337 transitions, 5739 flow. Second operand 8 states and 158 transitions. [2024-06-28 00:06:23,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 366 transitions, 6849 flow [2024-06-28 00:06:25,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 366 transitions, 6611 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-28 00:06:25,026 INFO L231 Difference]: Finished difference. Result has 356 places, 342 transitions, 5904 flow [2024-06-28 00:06:25,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5501, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5904, PETRI_PLACES=356, PETRI_TRANSITIONS=342} [2024-06-28 00:06:25,026 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-28 00:06:25,026 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 342 transitions, 5904 flow [2024-06-28 00:06:25,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:06:25,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:25,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:25,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-28 00:06:25,027 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:25,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:25,027 INFO L85 PathProgramCache]: Analyzing trace with hash 124398134, now seen corresponding path program 10 times [2024-06-28 00:06:25,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:25,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293233228] [2024-06-28 00:06:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:25,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:25,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:25,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293233228] [2024-06-28 00:06:25,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293233228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:25,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:25,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:06:25,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421217966] [2024-06-28 00:06:25,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:25,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:06:25,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:25,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:06:25,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:06:25,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:25,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 342 transitions, 5904 flow. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:06:25,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:25,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:25,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:26,207 INFO L124 PetriNetUnfolderBase]: 2029/3906 cut-off events. [2024-06-28 00:06:26,207 INFO L125 PetriNetUnfolderBase]: For 376223/376229 co-relation queries the response was YES. [2024-06-28 00:06:26,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26116 conditions, 3906 events. 2029/3906 cut-off events. For 376223/376229 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 29778 event pairs, 344 based on Foata normal form. 5/3837 useless extension candidates. Maximal degree in co-relation 25972. Up to 2334 conditions per place. [2024-06-28 00:06:26,258 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 253 selfloop transitions, 103 changer transitions 0/365 dead transitions. [2024-06-28 00:06:26,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 365 transitions, 6670 flow [2024-06-28 00:06:26,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:06:26,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:06:26,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-28 00:06:26,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-28 00:06:26,259 INFO L175 Difference]: Start difference. First operand has 356 places, 342 transitions, 5904 flow. Second operand 8 states and 158 transitions. [2024-06-28 00:06:26,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 365 transitions, 6670 flow [2024-06-28 00:06:27,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 365 transitions, 6446 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-28 00:06:27,862 INFO L231 Difference]: Finished difference. Result has 360 places, 342 transitions, 5890 flow [2024-06-28 00:06:27,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5680, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5890, PETRI_PLACES=360, PETRI_TRANSITIONS=342} [2024-06-28 00:06:27,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-28 00:06:27,862 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 342 transitions, 5890 flow [2024-06-28 00:06:27,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:06:27,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:27,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:27,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-28 00:06:27,863 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:27,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:27,863 INFO L85 PathProgramCache]: Analyzing trace with hash 240690066, now seen corresponding path program 9 times [2024-06-28 00:06:27,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:27,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798271557] [2024-06-28 00:06:27,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:27,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:28,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:28,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798271557] [2024-06-28 00:06:28,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798271557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:28,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:28,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:06:28,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939706820] [2024-06-28 00:06:28,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:28,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:06:28,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:28,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:06:28,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:06:28,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:28,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 342 transitions, 5890 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:28,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:28,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:28,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:29,109 INFO L124 PetriNetUnfolderBase]: 2041/3906 cut-off events. [2024-06-28 00:06:29,109 INFO L125 PetriNetUnfolderBase]: For 374267/374267 co-relation queries the response was YES. [2024-06-28 00:06:29,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26094 conditions, 3906 events. 2041/3906 cut-off events. For 374267/374267 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 29578 event pairs, 410 based on Foata normal form. 4/3820 useless extension candidates. Maximal degree in co-relation 25950. Up to 2297 conditions per place. [2024-06-28 00:06:29,158 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 261 selfloop transitions, 110 changer transitions 0/380 dead transitions. [2024-06-28 00:06:29,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 380 transitions, 6929 flow [2024-06-28 00:06:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:06:29,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:06:29,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-28 00:06:29,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 00:06:29,159 INFO L175 Difference]: Start difference. First operand has 360 places, 342 transitions, 5890 flow. Second operand 10 states and 210 transitions. [2024-06-28 00:06:29,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 380 transitions, 6929 flow [2024-06-28 00:06:30,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 380 transitions, 6723 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 00:06:30,686 INFO L231 Difference]: Finished difference. Result has 364 places, 343 transitions, 5925 flow [2024-06-28 00:06:30,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5684, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5925, PETRI_PLACES=364, PETRI_TRANSITIONS=343} [2024-06-28 00:06:30,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-28 00:06:30,686 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 343 transitions, 5925 flow [2024-06-28 00:06:30,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:30,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:30,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:30,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-28 00:06:30,687 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:30,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:30,687 INFO L85 PathProgramCache]: Analyzing trace with hash -685891216, now seen corresponding path program 11 times [2024-06-28 00:06:30,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:30,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401270771] [2024-06-28 00:06:30,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:30,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:30,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:30,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401270771] [2024-06-28 00:06:30,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401270771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:30,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:30,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:06:30,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451891878] [2024-06-28 00:06:30,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:30,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:06:30,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:30,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:06:30,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:06:30,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:30,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 343 transitions, 5925 flow. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:06:30,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:30,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:30,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:31,877 INFO L124 PetriNetUnfolderBase]: 2093/4022 cut-off events. [2024-06-28 00:06:31,877 INFO L125 PetriNetUnfolderBase]: For 411089/411095 co-relation queries the response was YES. [2024-06-28 00:06:31,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27385 conditions, 4022 events. 2093/4022 cut-off events. For 411089/411095 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 30790 event pairs, 412 based on Foata normal form. 5/3939 useless extension candidates. Maximal degree in co-relation 27240. Up to 2757 conditions per place. [2024-06-28 00:06:31,929 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 270 selfloop transitions, 88 changer transitions 0/367 dead transitions. [2024-06-28 00:06:31,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 367 transitions, 7033 flow [2024-06-28 00:06:31,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:06:31,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:06:31,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 00:06:31,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-28 00:06:31,931 INFO L175 Difference]: Start difference. First operand has 364 places, 343 transitions, 5925 flow. Second operand 8 states and 155 transitions. [2024-06-28 00:06:31,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 367 transitions, 7033 flow [2024-06-28 00:06:33,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 367 transitions, 6809 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 00:06:33,628 INFO L231 Difference]: Finished difference. Result has 365 places, 348 transitions, 6061 flow [2024-06-28 00:06:33,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5701, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6061, PETRI_PLACES=365, PETRI_TRANSITIONS=348} [2024-06-28 00:06:33,629 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-28 00:06:33,629 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 348 transitions, 6061 flow [2024-06-28 00:06:33,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:06:33,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:33,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:33,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-28 00:06:33,629 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:33,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:33,630 INFO L85 PathProgramCache]: Analyzing trace with hash 268115870, now seen corresponding path program 10 times [2024-06-28 00:06:33,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:33,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583425823] [2024-06-28 00:06:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:33,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:33,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:33,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:33,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583425823] [2024-06-28 00:06:33,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583425823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:33,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:33,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:06:33,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298085554] [2024-06-28 00:06:33,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:33,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:06:33,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:33,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:06:33,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:06:33,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:33,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 348 transitions, 6061 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:33,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:33,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:33,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:34,916 INFO L124 PetriNetUnfolderBase]: 2177/4188 cut-off events. [2024-06-28 00:06:34,916 INFO L125 PetriNetUnfolderBase]: For 473771/473777 co-relation queries the response was YES. [2024-06-28 00:06:34,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29163 conditions, 4188 events. 2177/4188 cut-off events. For 473771/473777 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 32402 event pairs, 301 based on Foata normal form. 5/4103 useless extension candidates. Maximal degree in co-relation 29016. Up to 1711 conditions per place. [2024-06-28 00:06:34,971 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 253 selfloop transitions, 136 changer transitions 0/398 dead transitions. [2024-06-28 00:06:34,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 398 transitions, 7387 flow [2024-06-28 00:06:34,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 00:06:34,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 00:06:34,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 259 transitions. [2024-06-28 00:06:34,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-28 00:06:34,972 INFO L175 Difference]: Start difference. First operand has 365 places, 348 transitions, 6061 flow. Second operand 13 states and 259 transitions. [2024-06-28 00:06:34,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 398 transitions, 7387 flow [2024-06-28 00:06:36,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 398 transitions, 7217 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-28 00:06:36,721 INFO L231 Difference]: Finished difference. Result has 375 places, 352 transitions, 6249 flow [2024-06-28 00:06:36,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5891, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6249, PETRI_PLACES=375, PETRI_TRANSITIONS=352} [2024-06-28 00:06:36,721 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-28 00:06:36,722 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 352 transitions, 6249 flow [2024-06-28 00:06:36,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:36,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:36,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:36,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-28 00:06:36,722 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:36,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:36,722 INFO L85 PathProgramCache]: Analyzing trace with hash 123783056, now seen corresponding path program 11 times [2024-06-28 00:06:36,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:36,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51162456] [2024-06-28 00:06:36,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:36,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:36,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:36,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:36,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51162456] [2024-06-28 00:06:36,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51162456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:36,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:36,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:06:36,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489269923] [2024-06-28 00:06:36,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:36,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:06:36,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:36,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:06:36,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:06:36,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:36,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 352 transitions, 6249 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:36,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:36,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:36,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:38,083 INFO L124 PetriNetUnfolderBase]: 2201/4238 cut-off events. [2024-06-28 00:06:38,083 INFO L125 PetriNetUnfolderBase]: For 498309/498309 co-relation queries the response was YES. [2024-06-28 00:06:38,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29707 conditions, 4238 events. 2201/4238 cut-off events. For 498309/498309 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 32976 event pairs, 406 based on Foata normal form. 8/4147 useless extension candidates. Maximal degree in co-relation 29558. Up to 2477 conditions per place. [2024-06-28 00:06:38,147 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 268 selfloop transitions, 126 changer transitions 0/403 dead transitions. [2024-06-28 00:06:38,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 403 transitions, 7583 flow [2024-06-28 00:06:38,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 00:06:38,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 00:06:38,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 268 transitions. [2024-06-28 00:06:38,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4908424908424908 [2024-06-28 00:06:38,148 INFO L175 Difference]: Start difference. First operand has 375 places, 352 transitions, 6249 flow. Second operand 13 states and 268 transitions. [2024-06-28 00:06:38,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 403 transitions, 7583 flow [2024-06-28 00:06:39,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 403 transitions, 7357 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-28 00:06:39,615 INFO L231 Difference]: Finished difference. Result has 377 places, 354 transitions, 6328 flow [2024-06-28 00:06:39,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6033, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6328, PETRI_PLACES=377, PETRI_TRANSITIONS=354} [2024-06-28 00:06:39,615 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-28 00:06:39,615 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 354 transitions, 6328 flow [2024-06-28 00:06:39,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:39,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:39,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:39,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-28 00:06:39,616 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:39,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:39,616 INFO L85 PathProgramCache]: Analyzing trace with hash -802983110, now seen corresponding path program 12 times [2024-06-28 00:06:39,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:39,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624742460] [2024-06-28 00:06:39,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:39,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:39,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:39,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624742460] [2024-06-28 00:06:39,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624742460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:39,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:39,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:06:39,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874644230] [2024-06-28 00:06:39,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:39,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:06:39,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:39,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:06:39,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:06:39,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:39,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 354 transitions, 6328 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:39,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:39,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:39,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:41,035 INFO L124 PetriNetUnfolderBase]: 2193/4222 cut-off events. [2024-06-28 00:06:41,035 INFO L125 PetriNetUnfolderBase]: For 454188/454194 co-relation queries the response was YES. [2024-06-28 00:06:41,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29204 conditions, 4222 events. 2193/4222 cut-off events. For 454188/454194 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 32661 event pairs, 235 based on Foata normal form. 5/4137 useless extension candidates. Maximal degree in co-relation 29056. Up to 1723 conditions per place. [2024-06-28 00:06:41,088 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 248 selfloop transitions, 147 changer transitions 0/404 dead transitions. [2024-06-28 00:06:41,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 404 transitions, 7806 flow [2024-06-28 00:06:41,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 00:06:41,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 00:06:41,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 279 transitions. [2024-06-28 00:06:41,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744897959183674 [2024-06-28 00:06:41,089 INFO L175 Difference]: Start difference. First operand has 377 places, 354 transitions, 6328 flow. Second operand 14 states and 279 transitions. [2024-06-28 00:06:41,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 404 transitions, 7806 flow [2024-06-28 00:06:42,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 404 transitions, 7674 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 00:06:42,884 INFO L231 Difference]: Finished difference. Result has 384 places, 354 transitions, 6503 flow [2024-06-28 00:06:42,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6196, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6503, PETRI_PLACES=384, PETRI_TRANSITIONS=354} [2024-06-28 00:06:42,884 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-28 00:06:42,885 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 354 transitions, 6503 flow [2024-06-28 00:06:42,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:42,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:42,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:42,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-28 00:06:42,885 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:42,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:42,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1007309432, now seen corresponding path program 12 times [2024-06-28 00:06:42,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:42,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970882030] [2024-06-28 00:06:42,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:42,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:43,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:43,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970882030] [2024-06-28 00:06:43,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970882030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:43,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:43,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:06:43,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470716581] [2024-06-28 00:06:43,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:43,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:06:43,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:43,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:06:43,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:06:43,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:43,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 354 transitions, 6503 flow. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:06:43,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:43,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:43,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:44,108 INFO L124 PetriNetUnfolderBase]: 2205/4240 cut-off events. [2024-06-28 00:06:44,108 INFO L125 PetriNetUnfolderBase]: For 471496/471502 co-relation queries the response was YES. [2024-06-28 00:06:44,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29911 conditions, 4240 events. 2205/4240 cut-off events. For 471496/471502 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 32953 event pairs, 442 based on Foata normal form. 5/4151 useless extension candidates. Maximal degree in co-relation 29762. Up to 2937 conditions per place. [2024-06-28 00:06:44,165 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 281 selfloop transitions, 85 changer transitions 0/375 dead transitions. [2024-06-28 00:06:44,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 375 transitions, 7536 flow [2024-06-28 00:06:44,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:06:44,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:06:44,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 00:06:44,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-28 00:06:44,166 INFO L175 Difference]: Start difference. First operand has 384 places, 354 transitions, 6503 flow. Second operand 8 states and 155 transitions. [2024-06-28 00:06:44,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 375 transitions, 7536 flow [2024-06-28 00:06:45,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 375 transitions, 7290 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-28 00:06:45,712 INFO L231 Difference]: Finished difference. Result has 381 places, 355 transitions, 6496 flow [2024-06-28 00:06:45,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6259, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6496, PETRI_PLACES=381, PETRI_TRANSITIONS=355} [2024-06-28 00:06:45,712 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-28 00:06:45,712 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 355 transitions, 6496 flow [2024-06-28 00:06:45,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:06:45,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:45,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:45,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-28 00:06:45,712 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:45,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:45,713 INFO L85 PathProgramCache]: Analyzing trace with hash 123395990, now seen corresponding path program 13 times [2024-06-28 00:06:45,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:45,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985618082] [2024-06-28 00:06:45,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:45,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:45,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:45,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985618082] [2024-06-28 00:06:45,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985618082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:45,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:45,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:06:45,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874788098] [2024-06-28 00:06:45,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:45,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:06:45,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:45,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:06:45,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:06:45,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:45,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 355 transitions, 6496 flow. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:06:45,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:45,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:45,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:46,944 INFO L124 PetriNetUnfolderBase]: 2197/4240 cut-off events. [2024-06-28 00:06:46,944 INFO L125 PetriNetUnfolderBase]: For 450583/450589 co-relation queries the response was YES. [2024-06-28 00:06:46,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29219 conditions, 4240 events. 2197/4240 cut-off events. For 450583/450589 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 33088 event pairs, 480 based on Foata normal form. 5/4149 useless extension candidates. Maximal degree in co-relation 29070. Up to 2933 conditions per place. [2024-06-28 00:06:47,000 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 278 selfloop transitions, 86 changer transitions 0/373 dead transitions. [2024-06-28 00:06:47,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 373 transitions, 7264 flow [2024-06-28 00:06:47,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:06:47,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:06:47,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 00:06:47,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:06:47,001 INFO L175 Difference]: Start difference. First operand has 381 places, 355 transitions, 6496 flow. Second operand 8 states and 152 transitions. [2024-06-28 00:06:47,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 373 transitions, 7264 flow [2024-06-28 00:06:48,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 373 transitions, 7004 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-28 00:06:48,697 INFO L231 Difference]: Finished difference. Result has 384 places, 355 transitions, 6412 flow [2024-06-28 00:06:48,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6236, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6412, PETRI_PLACES=384, PETRI_TRANSITIONS=355} [2024-06-28 00:06:48,698 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-28 00:06:48,698 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 355 transitions, 6412 flow [2024-06-28 00:06:48,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:06:48,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:48,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:48,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-28 00:06:48,698 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:48,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:48,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1841616930, now seen corresponding path program 13 times [2024-06-28 00:06:48,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:48,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399755337] [2024-06-28 00:06:48,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:48,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:48,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:48,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399755337] [2024-06-28 00:06:48,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399755337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:48,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:48,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:06:48,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592313059] [2024-06-28 00:06:48,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:48,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:06:48,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:48,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:06:48,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:06:48,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:48,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 355 transitions, 6412 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:48,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:48,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:48,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:50,134 INFO L124 PetriNetUnfolderBase]: 2193/4242 cut-off events. [2024-06-28 00:06:50,134 INFO L125 PetriNetUnfolderBase]: For 472211/472217 co-relation queries the response was YES. [2024-06-28 00:06:50,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26258 conditions, 4242 events. 2193/4242 cut-off events. For 472211/472217 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 33093 event pairs, 271 based on Foata normal form. 37/4198 useless extension candidates. Maximal degree in co-relation 26108. Up to 1751 conditions per place. [2024-06-28 00:06:50,188 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 216 selfloop transitions, 159 changer transitions 22/406 dead transitions. [2024-06-28 00:06:50,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 406 transitions, 7758 flow [2024-06-28 00:06:50,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 00:06:50,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 00:06:50,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 278 transitions. [2024-06-28 00:06:50,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-28 00:06:50,189 INFO L175 Difference]: Start difference. First operand has 384 places, 355 transitions, 6412 flow. Second operand 14 states and 278 transitions. [2024-06-28 00:06:50,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 406 transitions, 7758 flow [2024-06-28 00:06:51,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 406 transitions, 7640 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 00:06:51,741 INFO L231 Difference]: Finished difference. Result has 394 places, 339 transitions, 6401 flow [2024-06-28 00:06:51,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6294, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6401, PETRI_PLACES=394, PETRI_TRANSITIONS=339} [2024-06-28 00:06:51,742 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-28 00:06:51,742 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 339 transitions, 6401 flow [2024-06-28 00:06:51,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:51,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:51,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:51,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-28 00:06:51,742 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:51,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:51,742 INFO L85 PathProgramCache]: Analyzing trace with hash 18359298, now seen corresponding path program 14 times [2024-06-28 00:06:51,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:51,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992815167] [2024-06-28 00:06:51,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:51,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:51,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:51,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:51,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992815167] [2024-06-28 00:06:51,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992815167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:51,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:51,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:06:51,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376742243] [2024-06-28 00:06:51,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:51,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:06:51,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:51,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:06:51,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:06:51,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:51,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 339 transitions, 6401 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:51,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:51,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:51,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:53,045 INFO L124 PetriNetUnfolderBase]: 1893/3620 cut-off events. [2024-06-28 00:06:53,046 INFO L125 PetriNetUnfolderBase]: For 302603/302609 co-relation queries the response was YES. [2024-06-28 00:06:53,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24156 conditions, 3620 events. 1893/3620 cut-off events. For 302603/302609 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 27005 event pairs, 219 based on Foata normal form. 5/3557 useless extension candidates. Maximal degree in co-relation 24004. Up to 1747 conditions per place. [2024-06-28 00:06:53,085 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 227 selfloop transitions, 148 changer transitions 0/384 dead transitions. [2024-06-28 00:06:53,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 384 transitions, 7649 flow [2024-06-28 00:06:53,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 00:06:53,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 00:06:53,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 273 transitions. [2024-06-28 00:06:53,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-28 00:06:53,086 INFO L175 Difference]: Start difference. First operand has 394 places, 339 transitions, 6401 flow. Second operand 14 states and 273 transitions. [2024-06-28 00:06:53,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 384 transitions, 7649 flow [2024-06-28 00:06:54,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 384 transitions, 7276 flow, removed 22 selfloop flow, removed 19 redundant places. [2024-06-28 00:06:54,564 INFO L231 Difference]: Finished difference. Result has 382 places, 339 transitions, 6364 flow [2024-06-28 00:06:54,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6052, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6364, PETRI_PLACES=382, PETRI_TRANSITIONS=339} [2024-06-28 00:06:54,565 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-28 00:06:54,565 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 339 transitions, 6364 flow [2024-06-28 00:06:54,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:54,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:54,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:54,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-28 00:06:54,565 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:54,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:54,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1144720956, now seen corresponding path program 15 times [2024-06-28 00:06:54,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:54,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619792926] [2024-06-28 00:06:54,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:54,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:54,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:54,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:54,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619792926] [2024-06-28 00:06:54,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619792926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:54,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:54,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:06:54,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356349081] [2024-06-28 00:06:54,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:54,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:06:54,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:54,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:06:54,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:06:54,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:54,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 339 transitions, 6364 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:54,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:54,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:54,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:55,821 INFO L124 PetriNetUnfolderBase]: 1885/3610 cut-off events. [2024-06-28 00:06:55,822 INFO L125 PetriNetUnfolderBase]: For 260065/260071 co-relation queries the response was YES. [2024-06-28 00:06:55,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23321 conditions, 3610 events. 1885/3610 cut-off events. For 260065/260071 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 26878 event pairs, 189 based on Foata normal form. 5/3551 useless extension candidates. Maximal degree in co-relation 23174. Up to 1743 conditions per place. [2024-06-28 00:06:55,868 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 221 selfloop transitions, 153 changer transitions 0/383 dead transitions. [2024-06-28 00:06:55,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 383 transitions, 7588 flow [2024-06-28 00:06:55,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 00:06:55,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 00:06:55,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 269 transitions. [2024-06-28 00:06:55,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574829931972789 [2024-06-28 00:06:55,869 INFO L175 Difference]: Start difference. First operand has 382 places, 339 transitions, 6364 flow. Second operand 14 states and 269 transitions. [2024-06-28 00:06:55,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 383 transitions, 7588 flow [2024-06-28 00:06:57,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 383 transitions, 7270 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-28 00:06:57,171 INFO L231 Difference]: Finished difference. Result has 384 places, 339 transitions, 6374 flow [2024-06-28 00:06:57,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6050, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6374, PETRI_PLACES=384, PETRI_TRANSITIONS=339} [2024-06-28 00:06:57,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-28 00:06:57,172 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 339 transitions, 6374 flow [2024-06-28 00:06:57,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:57,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:57,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:57,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-28 00:06:57,172 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:57,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:57,172 INFO L85 PathProgramCache]: Analyzing trace with hash 18150792, now seen corresponding path program 14 times [2024-06-28 00:06:57,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:57,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42920234] [2024-06-28 00:06:57,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:57,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:57,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:57,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42920234] [2024-06-28 00:06:57,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42920234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:57,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:57,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:06:57,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713642909] [2024-06-28 00:06:57,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:57,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:06:57,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:57,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:06:57,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:06:57,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:57,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 339 transitions, 6374 flow. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:06:57,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:57,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:57,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:58,318 INFO L124 PetriNetUnfolderBase]: 1957/3723 cut-off events. [2024-06-28 00:06:58,319 INFO L125 PetriNetUnfolderBase]: For 317116/317150 co-relation queries the response was YES. [2024-06-28 00:06:58,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25444 conditions, 3723 events. 1957/3723 cut-off events. For 317116/317150 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 28193 event pairs, 901 based on Foata normal form. 8/3629 useless extension candidates. Maximal degree in co-relation 25297. Up to 2643 conditions per place. [2024-06-28 00:06:58,372 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 269 selfloop transitions, 83 changer transitions 0/361 dead transitions. [2024-06-28 00:06:58,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 361 transitions, 7712 flow [2024-06-28 00:06:58,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:06:58,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:06:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 00:06:58,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:06:58,373 INFO L175 Difference]: Start difference. First operand has 384 places, 339 transitions, 6374 flow. Second operand 8 states and 152 transitions. [2024-06-28 00:06:58,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 361 transitions, 7712 flow [2024-06-28 00:06:59,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 361 transitions, 7481 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-28 00:06:59,710 INFO L231 Difference]: Finished difference. Result has 382 places, 345 transitions, 6565 flow [2024-06-28 00:06:59,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6147, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6565, PETRI_PLACES=382, PETRI_TRANSITIONS=345} [2024-06-28 00:06:59,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-28 00:06:59,710 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 345 transitions, 6565 flow [2024-06-28 00:06:59,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:06:59,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:59,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:59,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-28 00:06:59,711 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:06:59,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:59,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1748277698, now seen corresponding path program 16 times [2024-06-28 00:06:59,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:59,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269941371] [2024-06-28 00:06:59,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:59,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:59,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:59,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269941371] [2024-06-28 00:06:59,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269941371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:59,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:59,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:06:59,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671337089] [2024-06-28 00:06:59,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:59,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:06:59,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:59,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:06:59,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:06:59,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:06:59,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 345 transitions, 6565 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:59,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:59,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:06:59,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:01,029 INFO L124 PetriNetUnfolderBase]: 1949/3738 cut-off events. [2024-06-28 00:07:01,029 INFO L125 PetriNetUnfolderBase]: For 288111/288117 co-relation queries the response was YES. [2024-06-28 00:07:01,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25022 conditions, 3738 events. 1949/3738 cut-off events. For 288111/288117 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 28190 event pairs, 203 based on Foata normal form. 5/3673 useless extension candidates. Maximal degree in co-relation 24874. Up to 1855 conditions per place. [2024-06-28 00:07:01,079 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 214 selfloop transitions, 165 changer transitions 0/388 dead transitions. [2024-06-28 00:07:01,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 388 transitions, 7609 flow [2024-06-28 00:07:01,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 00:07:01,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 00:07:01,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 269 transitions. [2024-06-28 00:07:01,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574829931972789 [2024-06-28 00:07:01,080 INFO L175 Difference]: Start difference. First operand has 382 places, 345 transitions, 6565 flow. Second operand 14 states and 269 transitions. [2024-06-28 00:07:01,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 388 transitions, 7609 flow [2024-06-28 00:07:02,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 388 transitions, 7441 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-28 00:07:02,435 INFO L231 Difference]: Finished difference. Result has 393 places, 345 transitions, 6747 flow [2024-06-28 00:07:02,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6397, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6747, PETRI_PLACES=393, PETRI_TRANSITIONS=345} [2024-06-28 00:07:02,436 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-28 00:07:02,436 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 345 transitions, 6747 flow [2024-06-28 00:07:02,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:02,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:02,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:02,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-28 00:07:02,437 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:02,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:02,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1253461588, now seen corresponding path program 15 times [2024-06-28 00:07:02,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:02,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566497336] [2024-06-28 00:07:02,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:02,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:02,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:02,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:02,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566497336] [2024-06-28 00:07:02,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566497336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:02,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:02,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:07:02,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532905455] [2024-06-28 00:07:02,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:02,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:07:02,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:02,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:07:02,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:07:02,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:07:02,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 345 transitions, 6747 flow. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:07:02,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:02,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:07:02,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:03,604 INFO L124 PetriNetUnfolderBase]: 1941/3711 cut-off events. [2024-06-28 00:07:03,604 INFO L125 PetriNetUnfolderBase]: For 284222/284253 co-relation queries the response was YES. [2024-06-28 00:07:03,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24819 conditions, 3711 events. 1941/3711 cut-off events. For 284222/284253 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 28170 event pairs, 885 based on Foata normal form. 8/3621 useless extension candidates. Maximal degree in co-relation 24669. Up to 2627 conditions per place. [2024-06-28 00:07:03,656 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 264 selfloop transitions, 86 changer transitions 0/359 dead transitions. [2024-06-28 00:07:03,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 359 transitions, 7665 flow [2024-06-28 00:07:03,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:07:03,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:07:03,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 00:07:03,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-28 00:07:03,657 INFO L175 Difference]: Start difference. First operand has 393 places, 345 transitions, 6747 flow. Second operand 8 states and 151 transitions. [2024-06-28 00:07:03,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 359 transitions, 7665 flow [2024-06-28 00:07:04,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 359 transitions, 7307 flow, removed 29 selfloop flow, removed 13 redundant places. [2024-06-28 00:07:04,922 INFO L231 Difference]: Finished difference. Result has 388 places, 345 transitions, 6567 flow [2024-06-28 00:07:04,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6391, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6567, PETRI_PLACES=388, PETRI_TRANSITIONS=345} [2024-06-28 00:07:04,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-28 00:07:04,923 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 345 transitions, 6567 flow [2024-06-28 00:07:04,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:07:04,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:04,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:04,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-28 00:07:04,923 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:04,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:04,923 INFO L85 PathProgramCache]: Analyzing trace with hash 135271702, now seen corresponding path program 16 times [2024-06-28 00:07:04,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:04,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213942395] [2024-06-28 00:07:04,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:04,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:05,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:05,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213942395] [2024-06-28 00:07:05,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213942395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:05,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:05,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:07:05,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457840002] [2024-06-28 00:07:05,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:05,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:07:05,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:05,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:07:05,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:07:05,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:07:05,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 345 transitions, 6567 flow. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:07:05,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:05,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:07:05,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:06,087 INFO L124 PetriNetUnfolderBase]: 1933/3690 cut-off events. [2024-06-28 00:07:06,087 INFO L125 PetriNetUnfolderBase]: For 259912/259946 co-relation queries the response was YES. [2024-06-28 00:07:06,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23762 conditions, 3690 events. 1933/3690 cut-off events. For 259912/259946 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 28000 event pairs, 897 based on Foata normal form. 8/3597 useless extension candidates. Maximal degree in co-relation 23612. Up to 2623 conditions per place. [2024-06-28 00:07:06,144 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 270 selfloop transitions, 80 changer transitions 0/359 dead transitions. [2024-06-28 00:07:06,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 359 transitions, 7295 flow [2024-06-28 00:07:06,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:07:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:07:06,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 00:07:06,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-28 00:07:06,145 INFO L175 Difference]: Start difference. First operand has 388 places, 345 transitions, 6567 flow. Second operand 8 states and 150 transitions. [2024-06-28 00:07:06,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 359 transitions, 7295 flow [2024-06-28 00:07:07,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 359 transitions, 7074 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 00:07:07,561 INFO L231 Difference]: Finished difference. Result has 390 places, 345 transitions, 6510 flow [2024-06-28 00:07:07,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6346, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6510, PETRI_PLACES=390, PETRI_TRANSITIONS=345} [2024-06-28 00:07:07,561 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-28 00:07:07,561 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 345 transitions, 6510 flow [2024-06-28 00:07:07,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:07:07,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:07,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:07,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-28 00:07:07,562 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:07,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:07,562 INFO L85 PathProgramCache]: Analyzing trace with hash 693556641, now seen corresponding path program 1 times [2024-06-28 00:07:07,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:07,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884994716] [2024-06-28 00:07:07,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:07,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:08,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:08,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884994716] [2024-06-28 00:07:08,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884994716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:08,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:08,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:08,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122549667] [2024-06-28 00:07:08,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:08,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:08,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:08,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:08,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:08,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:07:08,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 345 transitions, 6510 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:08,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:08,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:07:08,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:09,100 INFO L124 PetriNetUnfolderBase]: 1925/3746 cut-off events. [2024-06-28 00:07:09,100 INFO L125 PetriNetUnfolderBase]: For 232064/232082 co-relation queries the response was YES. [2024-06-28 00:07:09,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23233 conditions, 3746 events. 1925/3746 cut-off events. For 232064/232082 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 28673 event pairs, 501 based on Foata normal form. 14/3671 useless extension candidates. Maximal degree in co-relation 23082. Up to 2928 conditions per place. [2024-06-28 00:07:09,145 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 340 selfloop transitions, 28 changer transitions 0/377 dead transitions. [2024-06-28 00:07:09,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 377 transitions, 7336 flow [2024-06-28 00:07:09,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:07:09,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:07:09,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-28 00:07:09,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-28 00:07:09,145 INFO L175 Difference]: Start difference. First operand has 390 places, 345 transitions, 6510 flow. Second operand 8 states and 167 transitions. [2024-06-28 00:07:09,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 377 transitions, 7336 flow [2024-06-28 00:07:10,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 377 transitions, 7191 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-28 00:07:10,425 INFO L231 Difference]: Finished difference. Result has 393 places, 345 transitions, 6427 flow [2024-06-28 00:07:10,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6365, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6427, PETRI_PLACES=393, PETRI_TRANSITIONS=345} [2024-06-28 00:07:10,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-28 00:07:10,425 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 345 transitions, 6427 flow [2024-06-28 00:07:10,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:10,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:10,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:10,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-28 00:07:10,425 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:10,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:10,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1335848104, now seen corresponding path program 17 times [2024-06-28 00:07:10,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:10,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665912855] [2024-06-28 00:07:10,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:10,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:10,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:10,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665912855] [2024-06-28 00:07:10,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665912855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:10,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:10,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:10,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861238947] [2024-06-28 00:07:10,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:10,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:10,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:10,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:10,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:10,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:07:10,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 345 transitions, 6427 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:10,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:10,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:07:10,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:11,764 INFO L124 PetriNetUnfolderBase]: 1965/3820 cut-off events. [2024-06-28 00:07:11,764 INFO L125 PetriNetUnfolderBase]: For 276106/276112 co-relation queries the response was YES. [2024-06-28 00:07:11,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24262 conditions, 3820 events. 1965/3820 cut-off events. For 276106/276112 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 29258 event pairs, 397 based on Foata normal form. 5/3723 useless extension candidates. Maximal degree in co-relation 24110. Up to 2498 conditions per place. [2024-06-28 00:07:11,814 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 332 selfloop transitions, 39 changer transitions 0/380 dead transitions. [2024-06-28 00:07:11,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 380 transitions, 7511 flow [2024-06-28 00:07:11,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:07:11,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:07:11,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-28 00:07:11,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-28 00:07:11,815 INFO L175 Difference]: Start difference. First operand has 393 places, 345 transitions, 6427 flow. Second operand 10 states and 196 transitions. [2024-06-28 00:07:11,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 380 transitions, 7511 flow [2024-06-28 00:07:13,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 380 transitions, 7457 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 00:07:13,203 INFO L231 Difference]: Finished difference. Result has 397 places, 346 transitions, 6525 flow [2024-06-28 00:07:13,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6373, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6525, PETRI_PLACES=397, PETRI_TRANSITIONS=346} [2024-06-28 00:07:13,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-28 00:07:13,203 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 346 transitions, 6525 flow [2024-06-28 00:07:13,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:13,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:13,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:13,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-28 00:07:13,204 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:13,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:13,204 INFO L85 PathProgramCache]: Analyzing trace with hash -2051248004, now seen corresponding path program 17 times [2024-06-28 00:07:13,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:13,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704544896] [2024-06-28 00:07:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:13,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:13,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:13,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704544896] [2024-06-28 00:07:13,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704544896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:13,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:13,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:13,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300936440] [2024-06-28 00:07:13,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:13,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:13,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:13,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:13,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:13,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:07:13,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 346 transitions, 6525 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:13,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:13,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:07:13,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:14,520 INFO L124 PetriNetUnfolderBase]: 1977/3852 cut-off events. [2024-06-28 00:07:14,520 INFO L125 PetriNetUnfolderBase]: For 281271/281277 co-relation queries the response was YES. [2024-06-28 00:07:14,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24529 conditions, 3852 events. 1977/3852 cut-off events. For 281271/281277 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 29692 event pairs, 254 based on Foata normal form. 5/3775 useless extension candidates. Maximal degree in co-relation 24376. Up to 1511 conditions per place. [2024-06-28 00:07:14,576 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 215 selfloop transitions, 153 changer transitions 0/377 dead transitions. [2024-06-28 00:07:14,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 377 transitions, 7542 flow [2024-06-28 00:07:14,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:07:14,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:07:14,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-28 00:07:14,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2024-06-28 00:07:14,579 INFO L175 Difference]: Start difference. First operand has 397 places, 346 transitions, 6525 flow. Second operand 8 states and 170 transitions. [2024-06-28 00:07:14,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 377 transitions, 7542 flow [2024-06-28 00:07:16,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 377 transitions, 7404 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-28 00:07:16,337 INFO L231 Difference]: Finished difference. Result has 398 places, 347 transitions, 6713 flow [2024-06-28 00:07:16,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6387, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6713, PETRI_PLACES=398, PETRI_TRANSITIONS=347} [2024-06-28 00:07:16,337 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-28 00:07:16,337 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 347 transitions, 6713 flow [2024-06-28 00:07:16,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:16,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:16,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:16,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-28 00:07:16,338 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:16,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:16,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1319831078, now seen corresponding path program 18 times [2024-06-28 00:07:16,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:16,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995672179] [2024-06-28 00:07:16,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:16,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:16,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:16,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995672179] [2024-06-28 00:07:16,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995672179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:16,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:16,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:16,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594562314] [2024-06-28 00:07:16,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:16,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:16,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:16,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:16,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:16,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:07:16,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 347 transitions, 6713 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:16,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:16,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:07:16,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:17,672 INFO L124 PetriNetUnfolderBase]: 2009/3906 cut-off events. [2024-06-28 00:07:17,672 INFO L125 PetriNetUnfolderBase]: For 313290/313296 co-relation queries the response was YES. [2024-06-28 00:07:17,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26042 conditions, 3906 events. 2009/3906 cut-off events. For 313290/313296 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 30112 event pairs, 262 based on Foata normal form. 5/3844 useless extension candidates. Maximal degree in co-relation 25888. Up to 2275 conditions per place. [2024-06-28 00:07:17,724 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 262 selfloop transitions, 105 changer transitions 0/376 dead transitions. [2024-06-28 00:07:17,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 376 transitions, 7869 flow [2024-06-28 00:07:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:07:17,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:07:17,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 00:07:17,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-28 00:07:17,724 INFO L175 Difference]: Start difference. First operand has 398 places, 347 transitions, 6713 flow. Second operand 8 states and 159 transitions. [2024-06-28 00:07:17,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 376 transitions, 7869 flow [2024-06-28 00:07:19,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 376 transitions, 7671 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 00:07:19,415 INFO L231 Difference]: Finished difference. Result has 402 places, 352 transitions, 6926 flow [2024-06-28 00:07:19,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6515, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6926, PETRI_PLACES=402, PETRI_TRANSITIONS=352} [2024-06-28 00:07:19,415 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-28 00:07:19,416 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 352 transitions, 6926 flow [2024-06-28 00:07:19,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:19,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:19,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:19,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-28 00:07:19,416 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:19,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:19,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1319837588, now seen corresponding path program 19 times [2024-06-28 00:07:19,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:19,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652070257] [2024-06-28 00:07:19,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:19,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:19,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:19,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652070257] [2024-06-28 00:07:19,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652070257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:19,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:19,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:07:19,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764950342] [2024-06-28 00:07:19,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:19,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:07:19,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:19,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:07:19,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:07:19,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:07:19,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 352 transitions, 6926 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:19,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:19,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:07:19,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:20,584 INFO L124 PetriNetUnfolderBase]: 2101/4140 cut-off events. [2024-06-28 00:07:20,584 INFO L125 PetriNetUnfolderBase]: For 449377/449383 co-relation queries the response was YES. [2024-06-28 00:07:20,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28460 conditions, 4140 events. 2101/4140 cut-off events. For 449377/449383 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 32847 event pairs, 266 based on Foata normal form. 17/4081 useless extension candidates. Maximal degree in co-relation 28304. Up to 1763 conditions per place. [2024-06-28 00:07:20,641 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 235 selfloop transitions, 117 changer transitions 22/383 dead transitions. [2024-06-28 00:07:20,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 383 transitions, 8171 flow [2024-06-28 00:07:20,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:07:20,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:07:20,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-28 00:07:20,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-06-28 00:07:20,642 INFO L175 Difference]: Start difference. First operand has 402 places, 352 transitions, 6926 flow. Second operand 7 states and 146 transitions. [2024-06-28 00:07:20,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 383 transitions, 8171 flow [2024-06-28 00:07:22,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 383 transitions, 7863 flow, removed 97 selfloop flow, removed 5 redundant places. [2024-06-28 00:07:22,396 INFO L231 Difference]: Finished difference. Result has 405 places, 333 transitions, 6645 flow [2024-06-28 00:07:22,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6682, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6645, PETRI_PLACES=405, PETRI_TRANSITIONS=333} [2024-06-28 00:07:22,396 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-28 00:07:22,396 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 333 transitions, 6645 flow [2024-06-28 00:07:22,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:22,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:22,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:22,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-28 00:07:22,397 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:22,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:22,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1452911056, now seen corresponding path program 18 times [2024-06-28 00:07:22,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:22,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29600720] [2024-06-28 00:07:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:22,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:22,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:22,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29600720] [2024-06-28 00:07:22,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29600720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:22,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:22,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:22,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802236405] [2024-06-28 00:07:22,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:22,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:22,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:22,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:22,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:22,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:07:22,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 333 transitions, 6645 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:22,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:22,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:07:22,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:23,709 INFO L124 PetriNetUnfolderBase]: 2001/3944 cut-off events. [2024-06-28 00:07:23,709 INFO L125 PetriNetUnfolderBase]: For 416211/416217 co-relation queries the response was YES. [2024-06-28 00:07:23,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28311 conditions, 3944 events. 2001/3944 cut-off events. For 416211/416217 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 30963 event pairs, 364 based on Foata normal form. 5/3832 useless extension candidates. Maximal degree in co-relation 28154. Up to 1679 conditions per place. [2024-06-28 00:07:23,763 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 239 selfloop transitions, 113 changer transitions 4/365 dead transitions. [2024-06-28 00:07:23,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 365 transitions, 8075 flow [2024-06-28 00:07:23,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:07:23,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:07:23,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-28 00:07:23,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2024-06-28 00:07:23,764 INFO L175 Difference]: Start difference. First operand has 405 places, 333 transitions, 6645 flow. Second operand 8 states and 170 transitions. [2024-06-28 00:07:23,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 365 transitions, 8075 flow [2024-06-28 00:07:25,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 365 transitions, 7631 flow, removed 64 selfloop flow, removed 16 redundant places. [2024-06-28 00:07:25,316 INFO L231 Difference]: Finished difference. Result has 393 places, 333 transitions, 6492 flow [2024-06-28 00:07:25,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6250, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6492, PETRI_PLACES=393, PETRI_TRANSITIONS=333} [2024-06-28 00:07:25,317 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-28 00:07:25,317 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 333 transitions, 6492 flow [2024-06-28 00:07:25,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:25,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:25,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:25,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-28 00:07:25,318 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:25,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:25,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1452916636, now seen corresponding path program 19 times [2024-06-28 00:07:25,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:25,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186941263] [2024-06-28 00:07:25,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:25,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:25,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:25,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186941263] [2024-06-28 00:07:25,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186941263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:25,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:25,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:07:25,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322797190] [2024-06-28 00:07:25,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:25,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:07:25,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:25,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:07:25,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:07:25,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:07:25,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 333 transitions, 6492 flow. Second operand has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:25,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:25,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:07:25,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:26,697 INFO L124 PetriNetUnfolderBase]: 1973/3896 cut-off events. [2024-06-28 00:07:26,697 INFO L125 PetriNetUnfolderBase]: For 351505/351511 co-relation queries the response was YES. [2024-06-28 00:07:26,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26894 conditions, 3896 events. 1973/3896 cut-off events. For 351505/351511 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 30523 event pairs, 362 based on Foata normal form. 5/3784 useless extension candidates. Maximal degree in co-relation 26742. Up to 1667 conditions per place. [2024-06-28 00:07:26,750 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 235 selfloop transitions, 117 changer transitions 0/360 dead transitions. [2024-06-28 00:07:26,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 360 transitions, 7634 flow [2024-06-28 00:07:26,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:07:26,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:07:26,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 00:07:26,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-28 00:07:26,751 INFO L175 Difference]: Start difference. First operand has 393 places, 333 transitions, 6492 flow. Second operand 9 states and 172 transitions. [2024-06-28 00:07:26,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 360 transitions, 7634 flow [2024-06-28 00:07:28,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 360 transitions, 7481 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 00:07:28,315 INFO L231 Difference]: Finished difference. Result has 397 places, 333 transitions, 6583 flow [2024-06-28 00:07:28,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6343, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6583, PETRI_PLACES=397, PETRI_TRANSITIONS=333} [2024-06-28 00:07:28,316 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-28 00:07:28,316 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 333 transitions, 6583 flow [2024-06-28 00:07:28,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:28,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:28,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:28,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-28 00:07:28,316 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:28,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:28,316 INFO L85 PathProgramCache]: Analyzing trace with hash -708065860, now seen corresponding path program 20 times [2024-06-28 00:07:28,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:28,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395207579] [2024-06-28 00:07:28,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:28,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:28,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:28,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395207579] [2024-06-28 00:07:28,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395207579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:28,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:28,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:07:28,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776274339] [2024-06-28 00:07:28,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:28,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:07:28,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:28,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:07:28,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:07:28,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:07:28,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 333 transitions, 6583 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:28,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:28,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:07:28,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:29,479 INFO L124 PetriNetUnfolderBase]: 1985/3968 cut-off events. [2024-06-28 00:07:29,479 INFO L125 PetriNetUnfolderBase]: For 373335/373341 co-relation queries the response was YES. [2024-06-28 00:07:29,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26590 conditions, 3968 events. 1985/3968 cut-off events. For 373335/373341 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 31459 event pairs, 324 based on Foata normal form. 13/3897 useless extension candidates. Maximal degree in co-relation 26438. Up to 1514 conditions per place. [2024-06-28 00:07:29,525 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 240 selfloop transitions, 86 changer transitions 29/364 dead transitions. [2024-06-28 00:07:29,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 364 transitions, 7883 flow [2024-06-28 00:07:29,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:07:29,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:07:29,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-28 00:07:29,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2024-06-28 00:07:29,526 INFO L175 Difference]: Start difference. First operand has 397 places, 333 transitions, 6583 flow. Second operand 7 states and 148 transitions. [2024-06-28 00:07:29,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 364 transitions, 7883 flow [2024-06-28 00:07:30,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 364 transitions, 7645 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 00:07:30,957 INFO L231 Difference]: Finished difference. Result has 396 places, 305 transitions, 6057 flow [2024-06-28 00:07:30,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6349, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6057, PETRI_PLACES=396, PETRI_TRANSITIONS=305} [2024-06-28 00:07:30,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-28 00:07:30,957 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 305 transitions, 6057 flow [2024-06-28 00:07:30,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:30,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:30,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:30,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-28 00:07:30,958 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:30,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:30,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1305700198, now seen corresponding path program 21 times [2024-06-28 00:07:30,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:30,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543979877] [2024-06-28 00:07:30,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:30,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:31,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:31,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543979877] [2024-06-28 00:07:31,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543979877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:31,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:31,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:07:31,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435819147] [2024-06-28 00:07:31,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:31,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:07:31,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:31,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:07:31,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:07:31,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:07:31,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 305 transitions, 6057 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:31,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:31,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:07:31,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:32,019 INFO L124 PetriNetUnfolderBase]: 1797/3688 cut-off events. [2024-06-28 00:07:32,019 INFO L125 PetriNetUnfolderBase]: For 370711/370717 co-relation queries the response was YES. [2024-06-28 00:07:32,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24977 conditions, 3688 events. 1797/3688 cut-off events. For 370711/370717 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29429 event pairs, 142 based on Foata normal form. 13/3659 useless extension candidates. Maximal degree in co-relation 24846. Up to 1511 conditions per place. [2024-06-28 00:07:32,065 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 152 selfloop transitions, 131 changer transitions 41/333 dead transitions. [2024-06-28 00:07:32,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 333 transitions, 6854 flow [2024-06-28 00:07:32,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:07:32,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:07:32,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-28 00:07:32,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-06-28 00:07:32,066 INFO L175 Difference]: Start difference. First operand has 396 places, 305 transitions, 6057 flow. Second operand 7 states and 146 transitions. [2024-06-28 00:07:32,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 333 transitions, 6854 flow [2024-06-28 00:07:33,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 333 transitions, 6042 flow, removed 42 selfloop flow, removed 33 redundant places. [2024-06-28 00:07:33,347 INFO L231 Difference]: Finished difference. Result has 359 places, 267 transitions, 4735 flow [2024-06-28 00:07:33,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5247, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4735, PETRI_PLACES=359, PETRI_TRANSITIONS=267} [2024-06-28 00:07:33,347 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-28 00:07:33,347 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 267 transitions, 4735 flow [2024-06-28 00:07:33,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:33,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:33,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:33,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-28 00:07:33,348 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:33,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:33,349 INFO L85 PathProgramCache]: Analyzing trace with hash -870044302, now seen corresponding path program 20 times [2024-06-28 00:07:33,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:33,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773334082] [2024-06-28 00:07:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:33,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:33,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:33,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773334082] [2024-06-28 00:07:33,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773334082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:33,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:33,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:33,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261521348] [2024-06-28 00:07:33,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:33,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:33,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:33,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:33,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:33,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:07:33,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 267 transitions, 4735 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:33,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:33,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:07:33,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:34,576 INFO L124 PetriNetUnfolderBase]: 1629/3330 cut-off events. [2024-06-28 00:07:34,576 INFO L125 PetriNetUnfolderBase]: For 279605/279611 co-relation queries the response was YES. [2024-06-28 00:07:34,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21812 conditions, 3330 events. 1629/3330 cut-off events. For 279605/279611 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 25993 event pairs, 325 based on Foata normal form. 5/3239 useless extension candidates. Maximal degree in co-relation 21690. Up to 1551 conditions per place. [2024-06-28 00:07:34,617 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 194 selfloop transitions, 91 changer transitions 8/302 dead transitions. [2024-06-28 00:07:34,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 302 transitions, 5769 flow [2024-06-28 00:07:34,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:07:34,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:07:34,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 229 transitions. [2024-06-28 00:07:34,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45436507936507936 [2024-06-28 00:07:34,618 INFO L175 Difference]: Start difference. First operand has 359 places, 267 transitions, 4735 flow. Second operand 12 states and 229 transitions. [2024-06-28 00:07:34,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 302 transitions, 5769 flow [2024-06-28 00:07:35,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 302 transitions, 4980 flow, removed 54 selfloop flow, removed 44 redundant places. [2024-06-28 00:07:35,565 INFO L231 Difference]: Finished difference. Result has 326 places, 266 transitions, 4146 flow [2024-06-28 00:07:35,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3976, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4146, PETRI_PLACES=326, PETRI_TRANSITIONS=266} [2024-06-28 00:07:35,566 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-28 00:07:35,566 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 266 transitions, 4146 flow [2024-06-28 00:07:35,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:35,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:35,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:35,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-28 00:07:35,566 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:35,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:35,566 INFO L85 PathProgramCache]: Analyzing trace with hash -479991544, now seen corresponding path program 21 times [2024-06-28 00:07:35,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:35,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988875083] [2024-06-28 00:07:35,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:35,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:35,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:35,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988875083] [2024-06-28 00:07:35,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988875083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:35,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:35,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:35,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51023369] [2024-06-28 00:07:35,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:35,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:35,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:35,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:35,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:35,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:07:35,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 266 transitions, 4146 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:35,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:35,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:07:35,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:36,697 INFO L124 PetriNetUnfolderBase]: 1601/3290 cut-off events. [2024-06-28 00:07:36,697 INFO L125 PetriNetUnfolderBase]: For 223252/223258 co-relation queries the response was YES. [2024-06-28 00:07:36,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19709 conditions, 3290 events. 1601/3290 cut-off events. For 223252/223258 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 25717 event pairs, 294 based on Foata normal form. 5/3201 useless extension candidates. Maximal degree in co-relation 19597. Up to 1539 conditions per place. [2024-06-28 00:07:36,798 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 192 selfloop transitions, 85 changer transitions 6/292 dead transitions. [2024-06-28 00:07:36,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 292 transitions, 4934 flow [2024-06-28 00:07:36,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:07:36,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:07:36,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-28 00:07:36,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-28 00:07:36,799 INFO L175 Difference]: Start difference. First operand has 326 places, 266 transitions, 4146 flow. Second operand 8 states and 167 transitions. [2024-06-28 00:07:36,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 292 transitions, 4934 flow [2024-06-28 00:07:37,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 292 transitions, 4740 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-28 00:07:37,678 INFO L231 Difference]: Finished difference. Result has 322 places, 262 transitions, 4094 flow [2024-06-28 00:07:37,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3954, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4094, PETRI_PLACES=322, PETRI_TRANSITIONS=262} [2024-06-28 00:07:37,679 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-28 00:07:37,679 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 262 transitions, 4094 flow [2024-06-28 00:07:37,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:37,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:37,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:37,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-28 00:07:37,679 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:37,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:37,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1216943272, now seen corresponding path program 22 times [2024-06-28 00:07:37,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:37,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388299460] [2024-06-28 00:07:37,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:37,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:37,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:37,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388299460] [2024-06-28 00:07:37,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388299460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:37,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:37,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:07:37,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994357319] [2024-06-28 00:07:37,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:37,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:07:37,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:37,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:07:37,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:07:37,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:07:37,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 262 transitions, 4094 flow. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:07:37,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:37,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:07:37,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:38,701 INFO L124 PetriNetUnfolderBase]: 1623/3380 cut-off events. [2024-06-28 00:07:38,701 INFO L125 PetriNetUnfolderBase]: For 236104/236110 co-relation queries the response was YES. [2024-06-28 00:07:38,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19366 conditions, 3380 events. 1623/3380 cut-off events. For 236104/236110 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 26923 event pairs, 144 based on Foata normal form. 13/3345 useless extension candidates. Maximal degree in co-relation 19255. Up to 1295 conditions per place. [2024-06-28 00:07:38,739 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 144 selfloop transitions, 127 changer transitions 12/292 dead transitions. [2024-06-28 00:07:38,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 292 transitions, 4824 flow [2024-06-28 00:07:38,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:07:38,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:07:38,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-28 00:07:38,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-06-28 00:07:38,740 INFO L175 Difference]: Start difference. First operand has 322 places, 262 transitions, 4094 flow. Second operand 7 states and 146 transitions. [2024-06-28 00:07:38,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 292 transitions, 4824 flow [2024-06-28 00:07:39,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 292 transitions, 4571 flow, removed 2 selfloop flow, removed 14 redundant places. [2024-06-28 00:07:39,726 INFO L231 Difference]: Finished difference. Result has 316 places, 255 transitions, 4062 flow [2024-06-28 00:07:39,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3841, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4062, PETRI_PLACES=316, PETRI_TRANSITIONS=255} [2024-06-28 00:07:39,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-28 00:07:39,727 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 255 transitions, 4062 flow [2024-06-28 00:07:39,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-28 00:07:39,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:39,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:39,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-28 00:07:39,728 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:39,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:39,728 INFO L85 PathProgramCache]: Analyzing trace with hash 419927614, now seen corresponding path program 22 times [2024-06-28 00:07:39,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:39,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517320314] [2024-06-28 00:07:39,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:39,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:40,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:40,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:40,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517320314] [2024-06-28 00:07:40,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517320314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:40,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:40,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:40,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904640325] [2024-06-28 00:07:40,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:40,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:40,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:40,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:40,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:40,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:07:40,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 255 transitions, 4062 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:40,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:40,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:07:40,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:40,932 INFO L124 PetriNetUnfolderBase]: 1589/3294 cut-off events. [2024-06-28 00:07:40,932 INFO L125 PetriNetUnfolderBase]: For 219308/219314 co-relation queries the response was YES. [2024-06-28 00:07:40,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19884 conditions, 3294 events. 1589/3294 cut-off events. For 219308/219314 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 25769 event pairs, 279 based on Foata normal form. 5/3203 useless extension candidates. Maximal degree in co-relation 19773. Up to 1459 conditions per place. [2024-06-28 00:07:40,972 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 172 selfloop transitions, 123 changer transitions 4/308 dead transitions. [2024-06-28 00:07:40,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 308 transitions, 5211 flow [2024-06-28 00:07:40,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:07:40,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:07:40,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-28 00:07:40,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-28 00:07:40,973 INFO L175 Difference]: Start difference. First operand has 316 places, 255 transitions, 4062 flow. Second operand 12 states and 244 transitions. [2024-06-28 00:07:40,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 308 transitions, 5211 flow [2024-06-28 00:07:41,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 308 transitions, 4826 flow, removed 70 selfloop flow, removed 9 redundant places. [2024-06-28 00:07:41,991 INFO L231 Difference]: Finished difference. Result has 318 places, 260 transitions, 4055 flow [2024-06-28 00:07:41,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3697, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4055, PETRI_PLACES=318, PETRI_TRANSITIONS=260} [2024-06-28 00:07:41,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-28 00:07:41,992 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 260 transitions, 4055 flow [2024-06-28 00:07:41,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:41,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:41,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:41,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-28 00:07:41,992 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:41,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:41,992 INFO L85 PathProgramCache]: Analyzing trace with hash -706352398, now seen corresponding path program 23 times [2024-06-28 00:07:41,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:41,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130713721] [2024-06-28 00:07:41,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:41,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:42,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:42,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130713721] [2024-06-28 00:07:42,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130713721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:42,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:42,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:07:42,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806806835] [2024-06-28 00:07:42,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:42,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:07:42,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:42,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:07:42,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:07:42,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:07:42,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 260 transitions, 4055 flow. Second operand has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:42,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:42,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:07:42,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:43,200 INFO L124 PetriNetUnfolderBase]: 1593/3270 cut-off events. [2024-06-28 00:07:43,200 INFO L125 PetriNetUnfolderBase]: For 216033/216068 co-relation queries the response was YES. [2024-06-28 00:07:43,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19429 conditions, 3270 events. 1593/3270 cut-off events. For 216033/216068 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 25501 event pairs, 441 based on Foata normal form. 9/3169 useless extension candidates. Maximal degree in co-relation 19320. Up to 1471 conditions per place. [2024-06-28 00:07:43,234 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 183 selfloop transitions, 86 changer transitions 8/285 dead transitions. [2024-06-28 00:07:43,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 285 transitions, 5007 flow [2024-06-28 00:07:43,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:07:43,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:07:43,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 00:07:43,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 00:07:43,235 INFO L175 Difference]: Start difference. First operand has 318 places, 260 transitions, 4055 flow. Second operand 9 states and 168 transitions. [2024-06-28 00:07:43,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 285 transitions, 5007 flow [2024-06-28 00:07:44,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 285 transitions, 4631 flow, removed 18 selfloop flow, removed 14 redundant places. [2024-06-28 00:07:44,185 INFO L231 Difference]: Finished difference. Result has 313 places, 255 transitions, 3845 flow [2024-06-28 00:07:44,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3707, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3845, PETRI_PLACES=313, PETRI_TRANSITIONS=255} [2024-06-28 00:07:44,185 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-28 00:07:44,185 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 255 transitions, 3845 flow [2024-06-28 00:07:44,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:44,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:44,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:44,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-28 00:07:44,186 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:44,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:44,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1539910846, now seen corresponding path program 24 times [2024-06-28 00:07:44,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:44,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177493631] [2024-06-28 00:07:44,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:44,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:44,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:44,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177493631] [2024-06-28 00:07:44,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177493631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:44,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:44,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:44,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013720682] [2024-06-28 00:07:44,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:44,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:44,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:44,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:44,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:44,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:07:44,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 255 transitions, 3845 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:44,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:44,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:07:44,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:45,316 INFO L124 PetriNetUnfolderBase]: 1583/3264 cut-off events. [2024-06-28 00:07:45,317 INFO L125 PetriNetUnfolderBase]: For 204131/204166 co-relation queries the response was YES. [2024-06-28 00:07:45,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18879 conditions, 3264 events. 1583/3264 cut-off events. For 204131/204166 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 25510 event pairs, 435 based on Foata normal form. 13/3167 useless extension candidates. Maximal degree in co-relation 18773. Up to 1479 conditions per place. [2024-06-28 00:07:45,367 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 179 selfloop transitions, 81 changer transitions 12/281 dead transitions. [2024-06-28 00:07:45,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 281 transitions, 4918 flow [2024-06-28 00:07:45,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:07:45,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:07:45,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-28 00:07:45,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-06-28 00:07:45,368 INFO L175 Difference]: Start difference. First operand has 313 places, 255 transitions, 3845 flow. Second operand 8 states and 166 transitions. [2024-06-28 00:07:45,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 281 transitions, 4918 flow [2024-06-28 00:07:46,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 281 transitions, 4689 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-28 00:07:46,151 INFO L231 Difference]: Finished difference. Result has 311 places, 246 transitions, 3688 flow [2024-06-28 00:07:46,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3628, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3688, PETRI_PLACES=311, PETRI_TRANSITIONS=246} [2024-06-28 00:07:46,152 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-28 00:07:46,152 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 246 transitions, 3688 flow [2024-06-28 00:07:46,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:46,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:46,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:46,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-28 00:07:46,152 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:46,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:46,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1708811314, now seen corresponding path program 25 times [2024-06-28 00:07:46,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:46,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726201535] [2024-06-28 00:07:46,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:46,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:46,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:46,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:46,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726201535] [2024-06-28 00:07:46,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726201535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:46,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:46,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:46,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736556249] [2024-06-28 00:07:46,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:46,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:46,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:46,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:46,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:46,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:07:46,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 246 transitions, 3688 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:46,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:46,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:07:46,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:47,368 INFO L124 PetriNetUnfolderBase]: 1532/3217 cut-off events. [2024-06-28 00:07:47,368 INFO L125 PetriNetUnfolderBase]: For 179337/179343 co-relation queries the response was YES. [2024-06-28 00:07:47,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18013 conditions, 3217 events. 1532/3217 cut-off events. For 179337/179343 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 25266 event pairs, 259 based on Foata normal form. 5/3146 useless extension candidates. Maximal degree in co-relation 17909. Up to 1459 conditions per place. [2024-06-28 00:07:47,403 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 143 selfloop transitions, 128 changer transitions 13/293 dead transitions. [2024-06-28 00:07:47,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 293 transitions, 4583 flow [2024-06-28 00:07:47,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:07:47,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:07:47,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 241 transitions. [2024-06-28 00:07:47,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4781746031746032 [2024-06-28 00:07:47,404 INFO L175 Difference]: Start difference. First operand has 311 places, 246 transitions, 3688 flow. Second operand 12 states and 241 transitions. [2024-06-28 00:07:47,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 293 transitions, 4583 flow [2024-06-28 00:07:48,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 293 transitions, 4355 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-28 00:07:48,159 INFO L231 Difference]: Finished difference. Result has 313 places, 238 transitions, 3609 flow [2024-06-28 00:07:48,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3468, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3609, PETRI_PLACES=313, PETRI_TRANSITIONS=238} [2024-06-28 00:07:48,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-28 00:07:48,159 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 238 transitions, 3609 flow [2024-06-28 00:07:48,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:48,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:48,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:48,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-28 00:07:48,160 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:48,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:48,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1586069486, now seen corresponding path program 26 times [2024-06-28 00:07:48,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:48,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103014806] [2024-06-28 00:07:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:48,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:48,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:48,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103014806] [2024-06-28 00:07:48,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103014806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:48,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:48,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:48,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109915247] [2024-06-28 00:07:48,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:48,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:48,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:48,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:48,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:48,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:07:48,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 238 transitions, 3609 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:48,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:48,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:07:48,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:49,176 INFO L124 PetriNetUnfolderBase]: 1476/3083 cut-off events. [2024-06-28 00:07:49,176 INFO L125 PetriNetUnfolderBase]: For 170397/170432 co-relation queries the response was YES. [2024-06-28 00:07:49,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17319 conditions, 3083 events. 1476/3083 cut-off events. For 170397/170432 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23961 event pairs, 446 based on Foata normal form. 9/2984 useless extension candidates. Maximal degree in co-relation 17215. Up to 1447 conditions per place. [2024-06-28 00:07:49,207 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 166 selfloop transitions, 75 changer transitions 11/261 dead transitions. [2024-06-28 00:07:49,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 261 transitions, 4459 flow [2024-06-28 00:07:49,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:07:49,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:07:49,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-28 00:07:49,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-28 00:07:49,208 INFO L175 Difference]: Start difference. First operand has 313 places, 238 transitions, 3609 flow. Second operand 8 states and 165 transitions. [2024-06-28 00:07:49,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 261 transitions, 4459 flow [2024-06-28 00:07:49,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 261 transitions, 4078 flow, removed 12 selfloop flow, removed 19 redundant places. [2024-06-28 00:07:49,907 INFO L231 Difference]: Finished difference. Result has 298 places, 229 transitions, 3317 flow [2024-06-28 00:07:49,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3244, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3317, PETRI_PLACES=298, PETRI_TRANSITIONS=229} [2024-06-28 00:07:49,907 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-28 00:07:49,907 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 229 transitions, 3317 flow [2024-06-28 00:07:49,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:49,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:49,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:49,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-28 00:07:49,908 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:49,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:49,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1915614484, now seen corresponding path program 27 times [2024-06-28 00:07:49,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:49,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081084627] [2024-06-28 00:07:49,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:49,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:50,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:50,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081084627] [2024-06-28 00:07:50,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081084627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:50,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:50,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:07:50,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299429981] [2024-06-28 00:07:50,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:50,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:07:50,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:50,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:07:50,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:07:50,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:07:50,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 229 transitions, 3317 flow. Second operand has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:50,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:50,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:07:50,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:51,461 INFO L124 PetriNetUnfolderBase]: 1450/3125 cut-off events. [2024-06-28 00:07:51,461 INFO L125 PetriNetUnfolderBase]: For 152979/152985 co-relation queries the response was YES. [2024-06-28 00:07:51,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16744 conditions, 3125 events. 1450/3125 cut-off events. For 152979/152985 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 24862 event pairs, 358 based on Foata normal form. 10/3040 useless extension candidates. Maximal degree in co-relation 16644. Up to 2146 conditions per place. [2024-06-28 00:07:51,492 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 222 selfloop transitions, 33 changer transitions 14/277 dead transitions. [2024-06-28 00:07:51,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 277 transitions, 4004 flow [2024-06-28 00:07:51,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:07:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:07:51,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-28 00:07:51,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-28 00:07:51,493 INFO L175 Difference]: Start difference. First operand has 298 places, 229 transitions, 3317 flow. Second operand 11 states and 213 transitions. [2024-06-28 00:07:51,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 277 transitions, 4004 flow [2024-06-28 00:07:51,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 277 transitions, 3813 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-28 00:07:51,983 INFO L231 Difference]: Finished difference. Result has 297 places, 222 transitions, 3148 flow [2024-06-28 00:07:51,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3127, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3148, PETRI_PLACES=297, PETRI_TRANSITIONS=222} [2024-06-28 00:07:51,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-28 00:07:51,983 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 222 transitions, 3148 flow [2024-06-28 00:07:51,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:51,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:51,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:51,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-28 00:07:51,984 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:51,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:51,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1926476494, now seen corresponding path program 28 times [2024-06-28 00:07:51,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:51,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289047781] [2024-06-28 00:07:51,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:51,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:52,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:52,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289047781] [2024-06-28 00:07:52,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289047781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:52,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:52,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:07:52,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11013425] [2024-06-28 00:07:52,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:52,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:07:52,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:52,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:07:52,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:07:52,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:07:52,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 222 transitions, 3148 flow. Second operand has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:52,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:52,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:07:52,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:53,004 INFO L124 PetriNetUnfolderBase]: 1382/2959 cut-off events. [2024-06-28 00:07:53,004 INFO L125 PetriNetUnfolderBase]: For 139114/139120 co-relation queries the response was YES. [2024-06-28 00:07:53,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15790 conditions, 2959 events. 1382/2959 cut-off events. For 139114/139120 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 23192 event pairs, 397 based on Foata normal form. 5/2850 useless extension candidates. Maximal degree in co-relation 15691. Up to 2182 conditions per place. [2024-06-28 00:07:53,033 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 202 selfloop transitions, 23 changer transitions 6/239 dead transitions. [2024-06-28 00:07:53,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 239 transitions, 3648 flow [2024-06-28 00:07:53,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:07:53,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:07:53,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 00:07:53,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 00:07:53,034 INFO L175 Difference]: Start difference. First operand has 297 places, 222 transitions, 3148 flow. Second operand 9 states and 153 transitions. [2024-06-28 00:07:53,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 239 transitions, 3648 flow [2024-06-28 00:07:53,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 239 transitions, 3477 flow, removed 15 selfloop flow, removed 20 redundant places. [2024-06-28 00:07:53,547 INFO L231 Difference]: Finished difference. Result has 285 places, 218 transitions, 2989 flow [2024-06-28 00:07:53,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2977, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2989, PETRI_PLACES=285, PETRI_TRANSITIONS=218} [2024-06-28 00:07:53,547 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-28 00:07:53,547 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 218 transitions, 2989 flow [2024-06-28 00:07:53,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:53,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:53,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:53,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-28 00:07:53,548 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:53,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:53,548 INFO L85 PathProgramCache]: Analyzing trace with hash 694552764, now seen corresponding path program 29 times [2024-06-28 00:07:53,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:53,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772523338] [2024-06-28 00:07:53,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:53,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:53,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:53,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:53,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772523338] [2024-06-28 00:07:53,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772523338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:53,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:53,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:53,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256216512] [2024-06-28 00:07:53,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:53,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:53,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:53,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:53,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:53,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:07:53,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 218 transitions, 2989 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:53,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:53,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:07:53,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:54,488 INFO L124 PetriNetUnfolderBase]: 1322/2791 cut-off events. [2024-06-28 00:07:54,488 INFO L125 PetriNetUnfolderBase]: For 125592/125617 co-relation queries the response was YES. [2024-06-28 00:07:54,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14822 conditions, 2791 events. 1322/2791 cut-off events. For 125592/125617 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 21506 event pairs, 420 based on Foata normal form. 7/2700 useless extension candidates. Maximal degree in co-relation 14726. Up to 1367 conditions per place. [2024-06-28 00:07:54,516 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 144 selfloop transitions, 79 changer transitions 6/238 dead transitions. [2024-06-28 00:07:54,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 238 transitions, 3629 flow [2024-06-28 00:07:54,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:07:54,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:07:54,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 00:07:54,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-28 00:07:54,517 INFO L175 Difference]: Start difference. First operand has 285 places, 218 transitions, 2989 flow. Second operand 8 states and 160 transitions. [2024-06-28 00:07:54,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 238 transitions, 3629 flow [2024-06-28 00:07:54,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 238 transitions, 3550 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-28 00:07:54,874 INFO L231 Difference]: Finished difference. Result has 280 places, 214 transitions, 3046 flow [2024-06-28 00:07:54,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2912, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3046, PETRI_PLACES=280, PETRI_TRANSITIONS=214} [2024-06-28 00:07:54,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-28 00:07:54,874 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 214 transitions, 3046 flow [2024-06-28 00:07:54,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:54,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:54,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:54,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-28 00:07:54,875 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:54,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:54,875 INFO L85 PathProgramCache]: Analyzing trace with hash 466847844, now seen corresponding path program 30 times [2024-06-28 00:07:54,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:54,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706996699] [2024-06-28 00:07:54,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:54,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:55,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:55,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706996699] [2024-06-28 00:07:55,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706996699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:55,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:55,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:55,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086932802] [2024-06-28 00:07:55,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:55,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:55,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:55,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:55,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:55,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:07:55,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 214 transitions, 3046 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:55,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:55,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:07:55,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:55,790 INFO L124 PetriNetUnfolderBase]: 1272/2683 cut-off events. [2024-06-28 00:07:55,790 INFO L125 PetriNetUnfolderBase]: For 116250/116275 co-relation queries the response was YES. [2024-06-28 00:07:55,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14382 conditions, 2683 events. 1272/2683 cut-off events. For 116250/116275 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 20387 event pairs, 408 based on Foata normal form. 7/2588 useless extension candidates. Maximal degree in co-relation 14287. Up to 1311 conditions per place. [2024-06-28 00:07:55,816 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 143 selfloop transitions, 71 changer transitions 9/232 dead transitions. [2024-06-28 00:07:55,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 232 transitions, 3532 flow [2024-06-28 00:07:55,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:07:55,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:07:55,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-28 00:07:55,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-28 00:07:55,817 INFO L175 Difference]: Start difference. First operand has 280 places, 214 transitions, 3046 flow. Second operand 8 states and 158 transitions. [2024-06-28 00:07:55,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 232 transitions, 3532 flow [2024-06-28 00:07:56,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 232 transitions, 3315 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-28 00:07:56,207 INFO L231 Difference]: Finished difference. Result has 277 places, 208 transitions, 2933 flow [2024-06-28 00:07:56,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2829, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2933, PETRI_PLACES=277, PETRI_TRANSITIONS=208} [2024-06-28 00:07:56,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-28 00:07:56,207 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 208 transitions, 2933 flow [2024-06-28 00:07:56,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:56,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:56,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:56,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-28 00:07:56,207 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:56,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:56,208 INFO L85 PathProgramCache]: Analyzing trace with hash -505552754, now seen corresponding path program 1 times [2024-06-28 00:07:56,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:56,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775327914] [2024-06-28 00:07:56,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:56,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:56,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:56,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775327914] [2024-06-28 00:07:56,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775327914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:56,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:56,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 00:07:56,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935700698] [2024-06-28 00:07:56,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:56,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 00:07:56,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:56,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 00:07:56,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 00:07:56,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:07:56,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 208 transitions, 2933 flow. Second operand has 11 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:56,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:56,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:07:56,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:57,513 INFO L124 PetriNetUnfolderBase]: 1206/2587 cut-off events. [2024-06-28 00:07:57,513 INFO L125 PetriNetUnfolderBase]: For 104183/104189 co-relation queries the response was YES. [2024-06-28 00:07:57,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13309 conditions, 2587 events. 1206/2587 cut-off events. For 104183/104189 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 19697 event pairs, 257 based on Foata normal form. 9/2496 useless extension candidates. Maximal degree in co-relation 13214. Up to 1620 conditions per place. [2024-06-28 00:07:57,539 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 190 selfloop transitions, 36 changer transitions 6/240 dead transitions. [2024-06-28 00:07:57,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 240 transitions, 3477 flow [2024-06-28 00:07:57,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:07:57,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:07:57,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 00:07:57,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-28 00:07:57,539 INFO L175 Difference]: Start difference. First operand has 277 places, 208 transitions, 2933 flow. Second operand 8 states and 160 transitions. [2024-06-28 00:07:57,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 240 transitions, 3477 flow [2024-06-28 00:07:57,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 240 transitions, 3285 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-28 00:07:57,929 INFO L231 Difference]: Finished difference. Result has 272 places, 205 transitions, 2766 flow [2024-06-28 00:07:57,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2741, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2766, PETRI_PLACES=272, PETRI_TRANSITIONS=205} [2024-06-28 00:07:57,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-28 00:07:57,929 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 205 transitions, 2766 flow [2024-06-28 00:07:57,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:57,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:57,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:57,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-28 00:07:57,930 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:57,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:57,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1841376728, now seen corresponding path program 2 times [2024-06-28 00:07:57,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:57,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760413760] [2024-06-28 00:07:57,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:57,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:58,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:58,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760413760] [2024-06-28 00:07:58,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760413760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:58,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:58,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:58,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109105420] [2024-06-28 00:07:58,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:58,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:58,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:58,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:58,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:58,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:07:58,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 205 transitions, 2766 flow. Second operand has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:58,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:58,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:07:58,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:58,911 INFO L124 PetriNetUnfolderBase]: 1138/2439 cut-off events. [2024-06-28 00:07:58,911 INFO L125 PetriNetUnfolderBase]: For 84391/84397 co-relation queries the response was YES. [2024-06-28 00:07:58,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12128 conditions, 2439 events. 1138/2439 cut-off events. For 84391/84397 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 18261 event pairs, 218 based on Foata normal form. 9/2360 useless extension candidates. Maximal degree in co-relation 12033. Up to 977 conditions per place. [2024-06-28 00:07:58,934 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 142 selfloop transitions, 79 changer transitions 6/236 dead transitions. [2024-06-28 00:07:58,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 236 transitions, 3455 flow [2024-06-28 00:07:58,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:07:58,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:07:58,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-28 00:07:58,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-06-28 00:07:58,936 INFO L175 Difference]: Start difference. First operand has 272 places, 205 transitions, 2766 flow. Second operand 7 states and 153 transitions. [2024-06-28 00:07:58,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 236 transitions, 3455 flow [2024-06-28 00:07:59,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 236 transitions, 3297 flow, removed 4 selfloop flow, removed 14 redundant places. [2024-06-28 00:07:59,228 INFO L231 Difference]: Finished difference. Result has 265 places, 203 transitions, 2736 flow [2024-06-28 00:07:59,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2612, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2736, PETRI_PLACES=265, PETRI_TRANSITIONS=203} [2024-06-28 00:07:59,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-28 00:07:59,229 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 203 transitions, 2736 flow [2024-06-28 00:07:59,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:59,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:59,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:59,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-28 00:07:59,229 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:07:59,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:59,230 INFO L85 PathProgramCache]: Analyzing trace with hash 63166764, now seen corresponding path program 3 times [2024-06-28 00:07:59,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:59,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077627471] [2024-06-28 00:07:59,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:59,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:59,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:59,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077627471] [2024-06-28 00:07:59,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077627471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:59,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:59,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:59,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578873195] [2024-06-28 00:07:59,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:59,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:59,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:59,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:59,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:59,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:07:59,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 203 transitions, 2736 flow. Second operand has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:59,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:59,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:07:59,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:00,265 INFO L124 PetriNetUnfolderBase]: 1102/2383 cut-off events. [2024-06-28 00:08:00,265 INFO L125 PetriNetUnfolderBase]: For 82509/82515 co-relation queries the response was YES. [2024-06-28 00:08:00,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11605 conditions, 2383 events. 1102/2383 cut-off events. For 82509/82515 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 17929 event pairs, 236 based on Foata normal form. 9/2302 useless extension candidates. Maximal degree in co-relation 11513. Up to 985 conditions per place. [2024-06-28 00:08:00,288 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 140 selfloop transitions, 71 changer transitions 10/230 dead transitions. [2024-06-28 00:08:00,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 230 transitions, 3403 flow [2024-06-28 00:08:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:08:00,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:08:00,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-28 00:08:00,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-28 00:08:00,288 INFO L175 Difference]: Start difference. First operand has 265 places, 203 transitions, 2736 flow. Second operand 7 states and 150 transitions. [2024-06-28 00:08:00,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 230 transitions, 3403 flow [2024-06-28 00:08:00,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 230 transitions, 3203 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-28 00:08:00,553 INFO L231 Difference]: Finished difference. Result has 264 places, 198 transitions, 2632 flow [2024-06-28 00:08:00,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2541, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2632, PETRI_PLACES=264, PETRI_TRANSITIONS=198} [2024-06-28 00:08:00,553 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-28 00:08:00,554 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 198 transitions, 2632 flow [2024-06-28 00:08:00,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:00,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:00,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:00,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-28 00:08:00,554 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:08:00,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:00,555 INFO L85 PathProgramCache]: Analyzing trace with hash 327664820, now seen corresponding path program 4 times [2024-06-28 00:08:00,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:00,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781805994] [2024-06-28 00:08:00,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:00,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:01,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:01,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781805994] [2024-06-28 00:08:01,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781805994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:01,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:01,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:08:01,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558407733] [2024-06-28 00:08:01,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:01,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:08:01,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:01,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:08:01,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:08:01,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:08:01,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 198 transitions, 2632 flow. Second operand has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:01,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:01,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:08:01,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:01,624 INFO L124 PetriNetUnfolderBase]: 1038/2287 cut-off events. [2024-06-28 00:08:01,624 INFO L125 PetriNetUnfolderBase]: For 80452/80453 co-relation queries the response was YES. [2024-06-28 00:08:01,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10815 conditions, 2287 events. 1038/2287 cut-off events. For 80452/80453 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 17230 event pairs, 216 based on Foata normal form. 8/2209 useless extension candidates. Maximal degree in co-relation 10723. Up to 993 conditions per place. [2024-06-28 00:08:01,645 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 128 selfloop transitions, 76 changer transitions 14/227 dead transitions. [2024-06-28 00:08:01,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 227 transitions, 3278 flow [2024-06-28 00:08:01,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:08:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:08:01,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-28 00:08:01,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-28 00:08:01,647 INFO L175 Difference]: Start difference. First operand has 264 places, 198 transitions, 2632 flow. Second operand 9 states and 183 transitions. [2024-06-28 00:08:01,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 227 transitions, 3278 flow [2024-06-28 00:08:01,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 227 transitions, 3068 flow, removed 18 selfloop flow, removed 12 redundant places. [2024-06-28 00:08:01,893 INFO L231 Difference]: Finished difference. Result has 261 places, 189 transitions, 2478 flow [2024-06-28 00:08:01,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2431, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2478, PETRI_PLACES=261, PETRI_TRANSITIONS=189} [2024-06-28 00:08:01,893 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-28 00:08:01,893 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 189 transitions, 2478 flow [2024-06-28 00:08:01,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:01,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:01,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:01,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-28 00:08:01,894 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:08:01,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:01,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1642945670, now seen corresponding path program 5 times [2024-06-28 00:08:01,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:01,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482931621] [2024-06-28 00:08:01,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:01,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:02,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:02,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482931621] [2024-06-28 00:08:02,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482931621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:02,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:02,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:08:02,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616453803] [2024-06-28 00:08:02,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:02,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:08:02,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:02,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:08:02,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:08:02,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:08:02,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 189 transitions, 2478 flow. Second operand has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:02,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:02,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:08:02,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:02,807 INFO L124 PetriNetUnfolderBase]: 982/2155 cut-off events. [2024-06-28 00:08:02,807 INFO L125 PetriNetUnfolderBase]: For 89445/89445 co-relation queries the response was YES. [2024-06-28 00:08:02,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10502 conditions, 2155 events. 982/2155 cut-off events. For 89445/89445 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16283 event pairs, 186 based on Foata normal form. 8/2100 useless extension candidates. Maximal degree in co-relation 10411. Up to 814 conditions per place. [2024-06-28 00:08:02,824 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 133 selfloop transitions, 56 changer transitions 18/216 dead transitions. [2024-06-28 00:08:02,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 216 transitions, 3086 flow [2024-06-28 00:08:02,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:08:02,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:08:02,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-28 00:08:02,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-28 00:08:02,825 INFO L175 Difference]: Start difference. First operand has 261 places, 189 transitions, 2478 flow. Second operand 8 states and 157 transitions. [2024-06-28 00:08:02,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 216 transitions, 3086 flow [2024-06-28 00:08:03,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 216 transitions, 2800 flow, removed 16 selfloop flow, removed 17 redundant places. [2024-06-28 00:08:03,062 INFO L231 Difference]: Finished difference. Result has 249 places, 181 transitions, 2184 flow [2024-06-28 00:08:03,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2196, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2184, PETRI_PLACES=249, PETRI_TRANSITIONS=181} [2024-06-28 00:08:03,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-28 00:08:03,063 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 181 transitions, 2184 flow [2024-06-28 00:08:03,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:03,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:03,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:03,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-28 00:08:03,063 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:08:03,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:03,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1327245080, now seen corresponding path program 6 times [2024-06-28 00:08:03,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:03,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274277247] [2024-06-28 00:08:03,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:03,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:03,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:03,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274277247] [2024-06-28 00:08:03,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274277247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:03,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:03,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:08:03,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880580132] [2024-06-28 00:08:03,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:03,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:08:03,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:03,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:08:03,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:08:03,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:08:03,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 181 transitions, 2184 flow. Second operand has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:03,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:03,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:08:03,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:03,925 INFO L124 PetriNetUnfolderBase]: 980/2121 cut-off events. [2024-06-28 00:08:03,925 INFO L125 PetriNetUnfolderBase]: For 116619/116619 co-relation queries the response was YES. [2024-06-28 00:08:03,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10796 conditions, 2121 events. 980/2121 cut-off events. For 116619/116619 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 16137 event pairs, 220 based on Foata normal form. 8/2060 useless extension candidates. Maximal degree in co-relation 10711. Up to 1187 conditions per place. [2024-06-28 00:08:03,945 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 145 selfloop transitions, 43 changer transitions 9/206 dead transitions. [2024-06-28 00:08:03,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 206 transitions, 2762 flow [2024-06-28 00:08:03,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:08:03,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:08:03,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-28 00:08:03,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-28 00:08:03,946 INFO L175 Difference]: Start difference. First operand has 249 places, 181 transitions, 2184 flow. Second operand 8 states and 158 transitions. [2024-06-28 00:08:03,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 206 transitions, 2762 flow [2024-06-28 00:08:04,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 206 transitions, 2593 flow, removed 18 selfloop flow, removed 15 redundant places. [2024-06-28 00:08:04,194 INFO L231 Difference]: Finished difference. Result has 236 places, 176 transitions, 2039 flow [2024-06-28 00:08:04,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2031, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2039, PETRI_PLACES=236, PETRI_TRANSITIONS=176} [2024-06-28 00:08:04,194 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-28 00:08:04,194 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 176 transitions, 2039 flow [2024-06-28 00:08:04,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:04,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:04,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:04,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-28 00:08:04,195 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:08:04,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:04,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1602323798, now seen corresponding path program 7 times [2024-06-28 00:08:04,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:04,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152787993] [2024-06-28 00:08:04,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:04,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:04,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:04,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:04,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152787993] [2024-06-28 00:08:04,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152787993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:04,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:04,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:08:04,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830916655] [2024-06-28 00:08:04,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:04,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:08:04,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:04,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:08:04,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:08:04,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:08:04,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 176 transitions, 2039 flow. Second operand has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:04,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:04,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:08:04,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:05,012 INFO L124 PetriNetUnfolderBase]: 916/1981 cut-off events. [2024-06-28 00:08:05,012 INFO L125 PetriNetUnfolderBase]: For 80205/80205 co-relation queries the response was YES. [2024-06-28 00:08:05,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9465 conditions, 1981 events. 916/1981 cut-off events. For 80205/80205 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 14756 event pairs, 194 based on Foata normal form. 8/1926 useless extension candidates. Maximal degree in co-relation 9389. Up to 662 conditions per place. [2024-06-28 00:08:05,029 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 133 selfloop transitions, 48 changer transitions 16/206 dead transitions. [2024-06-28 00:08:05,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 206 transitions, 2729 flow [2024-06-28 00:08:05,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:08:05,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:08:05,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-28 00:08:05,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-28 00:08:05,030 INFO L175 Difference]: Start difference. First operand has 236 places, 176 transitions, 2039 flow. Second operand 8 states and 161 transitions. [2024-06-28 00:08:05,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 206 transitions, 2729 flow [2024-06-28 00:08:05,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 206 transitions, 2625 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-28 00:08:05,240 INFO L231 Difference]: Finished difference. Result has 235 places, 170 transitions, 1956 flow [2024-06-28 00:08:05,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1939, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1956, PETRI_PLACES=235, PETRI_TRANSITIONS=170} [2024-06-28 00:08:05,240 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-28 00:08:05,240 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 170 transitions, 1956 flow [2024-06-28 00:08:05,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:05,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:05,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:05,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-28 00:08:05,241 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:08:05,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:05,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1468701522, now seen corresponding path program 8 times [2024-06-28 00:08:05,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:05,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729807925] [2024-06-28 00:08:05,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:05,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:05,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:05,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729807925] [2024-06-28 00:08:05,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729807925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:05,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:05,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:08:05,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603840936] [2024-06-28 00:08:05,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:05,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:08:05,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:05,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:08:05,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:08:05,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:08:05,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 170 transitions, 1956 flow. Second operand has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:05,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:05,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:08:05,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:06,090 INFO L124 PetriNetUnfolderBase]: 832/1813 cut-off events. [2024-06-28 00:08:06,090 INFO L125 PetriNetUnfolderBase]: For 67715/67715 co-relation queries the response was YES. [2024-06-28 00:08:06,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8389 conditions, 1813 events. 832/1813 cut-off events. For 67715/67715 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 13289 event pairs, 222 based on Foata normal form. 8/1752 useless extension candidates. Maximal degree in co-relation 8313. Up to 770 conditions per place. [2024-06-28 00:08:06,104 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 125 selfloop transitions, 40 changer transitions 19/193 dead transitions. [2024-06-28 00:08:06,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 193 transitions, 2490 flow [2024-06-28 00:08:06,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:08:06,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:08:06,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 00:08:06,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:08:06,105 INFO L175 Difference]: Start difference. First operand has 235 places, 170 transitions, 1956 flow. Second operand 8 states and 152 transitions. [2024-06-28 00:08:06,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 193 transitions, 2490 flow [2024-06-28 00:08:06,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 193 transitions, 2370 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-28 00:08:06,289 INFO L231 Difference]: Finished difference. Result has 228 places, 163 transitions, 1854 flow [2024-06-28 00:08:06,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1842, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1854, PETRI_PLACES=228, PETRI_TRANSITIONS=163} [2024-06-28 00:08:06,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-28 00:08:06,289 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 163 transitions, 1854 flow [2024-06-28 00:08:06,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:06,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:06,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:06,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-28 00:08:06,290 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:08:06,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:06,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1475127692, now seen corresponding path program 9 times [2024-06-28 00:08:06,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:06,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811528901] [2024-06-28 00:08:06,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:06,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:06,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:06,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811528901] [2024-06-28 00:08:06,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811528901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:06,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:06,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:08:06,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629360479] [2024-06-28 00:08:06,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:06,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:08:06,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:06,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:08:06,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:08:06,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:08:06,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 163 transitions, 1854 flow. Second operand has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:06,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:06,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:08:06,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:07,098 INFO L124 PetriNetUnfolderBase]: 784/1709 cut-off events. [2024-06-28 00:08:07,098 INFO L125 PetriNetUnfolderBase]: For 63039/63039 co-relation queries the response was YES. [2024-06-28 00:08:07,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7914 conditions, 1709 events. 784/1709 cut-off events. For 63039/63039 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 12407 event pairs, 190 based on Foata normal form. 8/1656 useless extension candidates. Maximal degree in co-relation 7841. Up to 1099 conditions per place. [2024-06-28 00:08:07,112 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 129 selfloop transitions, 30 changer transitions 16/184 dead transitions. [2024-06-28 00:08:07,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 184 transitions, 2254 flow [2024-06-28 00:08:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:08:07,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:08:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 00:08:07,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:08:07,112 INFO L175 Difference]: Start difference. First operand has 228 places, 163 transitions, 1854 flow. Second operand 8 states and 152 transitions. [2024-06-28 00:08:07,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 184 transitions, 2254 flow [2024-06-28 00:08:07,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 184 transitions, 2186 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-28 00:08:07,264 INFO L231 Difference]: Finished difference. Result has 219 places, 153 transitions, 1700 flow [2024-06-28 00:08:07,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1700, PETRI_PLACES=219, PETRI_TRANSITIONS=153} [2024-06-28 00:08:07,265 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-28 00:08:07,265 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 153 transitions, 1700 flow [2024-06-28 00:08:07,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:07,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:07,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:07,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-28 00:08:07,265 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:08:07,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:07,265 INFO L85 PathProgramCache]: Analyzing trace with hash -278548724, now seen corresponding path program 10 times [2024-06-28 00:08:07,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:07,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245122816] [2024-06-28 00:08:07,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:07,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:07,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:07,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245122816] [2024-06-28 00:08:07,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245122816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:07,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:07,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:08:07,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210497290] [2024-06-28 00:08:07,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:07,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:08:07,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:07,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:08:07,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:08:07,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:08:07,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 153 transitions, 1700 flow. Second operand has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:07,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:07,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:08:07,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:08,091 INFO L124 PetriNetUnfolderBase]: 773/1684 cut-off events. [2024-06-28 00:08:08,091 INFO L125 PetriNetUnfolderBase]: For 64088/64088 co-relation queries the response was YES. [2024-06-28 00:08:08,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7933 conditions, 1684 events. 773/1684 cut-off events. For 64088/64088 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 12422 event pairs, 216 based on Foata normal form. 8/1625 useless extension candidates. Maximal degree in co-relation 7864. Up to 1001 conditions per place. [2024-06-28 00:08:08,103 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 127 selfloop transitions, 26 changer transitions 11/173 dead transitions. [2024-06-28 00:08:08,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 173 transitions, 2172 flow [2024-06-28 00:08:08,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:08:08,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:08:08,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 00:08:08,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:08:08,104 INFO L175 Difference]: Start difference. First operand has 219 places, 153 transitions, 1700 flow. Second operand 8 states and 152 transitions. [2024-06-28 00:08:08,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 173 transitions, 2172 flow [2024-06-28 00:08:08,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 173 transitions, 2051 flow, removed 5 selfloop flow, removed 17 redundant places. [2024-06-28 00:08:08,233 INFO L231 Difference]: Finished difference. Result has 205 places, 148 transitions, 1586 flow [2024-06-28 00:08:08,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1583, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1586, PETRI_PLACES=205, PETRI_TRANSITIONS=148} [2024-06-28 00:08:08,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-28 00:08:08,233 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 148 transitions, 1586 flow [2024-06-28 00:08:08,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:08,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:08,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:08,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-28 00:08:08,233 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:08:08,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:08,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1161605946, now seen corresponding path program 11 times [2024-06-28 00:08:08,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:08,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064802070] [2024-06-28 00:08:08,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:08,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:08,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:08,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064802070] [2024-06-28 00:08:08,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064802070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:08,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:08,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:08:08,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473632123] [2024-06-28 00:08:08,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:08,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:08:08,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:08,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:08:08,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:08:08,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:08:08,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 148 transitions, 1586 flow. Second operand has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:08,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:08,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:08:08,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:09,056 INFO L124 PetriNetUnfolderBase]: 749/1626 cut-off events. [2024-06-28 00:08:09,056 INFO L125 PetriNetUnfolderBase]: For 61729/61729 co-relation queries the response was YES. [2024-06-28 00:08:09,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7621 conditions, 1626 events. 749/1626 cut-off events. For 61729/61729 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 11829 event pairs, 230 based on Foata normal form. 8/1575 useless extension candidates. Maximal degree in co-relation 7554. Up to 1001 conditions per place. [2024-06-28 00:08:09,068 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 123 selfloop transitions, 27 changer transitions 9/168 dead transitions. [2024-06-28 00:08:09,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 168 transitions, 2046 flow [2024-06-28 00:08:09,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:08:09,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:08:09,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-28 00:08:09,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-28 00:08:09,069 INFO L175 Difference]: Start difference. First operand has 205 places, 148 transitions, 1586 flow. Second operand 8 states and 153 transitions. [2024-06-28 00:08:09,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 168 transitions, 2046 flow [2024-06-28 00:08:09,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 168 transitions, 1967 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-28 00:08:09,193 INFO L231 Difference]: Finished difference. Result has 200 places, 143 transitions, 1494 flow [2024-06-28 00:08:09,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1513, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1494, PETRI_PLACES=200, PETRI_TRANSITIONS=143} [2024-06-28 00:08:09,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-28 00:08:09,194 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 143 transitions, 1494 flow [2024-06-28 00:08:09,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:09,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:09,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:09,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-28 00:08:09,194 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:08:09,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:09,194 INFO L85 PathProgramCache]: Analyzing trace with hash -464327752, now seen corresponding path program 12 times [2024-06-28 00:08:09,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:09,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265298703] [2024-06-28 00:08:09,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:09,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:09,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:09,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265298703] [2024-06-28 00:08:09,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265298703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:09,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:09,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:08:09,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947893008] [2024-06-28 00:08:09,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:09,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:08:09,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:09,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:08:09,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:08:09,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:08:09,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 143 transitions, 1494 flow. Second operand has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:09,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:09,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:08:09,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:09,960 INFO L124 PetriNetUnfolderBase]: 685/1494 cut-off events. [2024-06-28 00:08:09,961 INFO L125 PetriNetUnfolderBase]: For 47673/47673 co-relation queries the response was YES. [2024-06-28 00:08:09,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6749 conditions, 1494 events. 685/1494 cut-off events. For 47673/47673 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 10571 event pairs, 206 based on Foata normal form. 8/1443 useless extension candidates. Maximal degree in co-relation 6684. Up to 1001 conditions per place. [2024-06-28 00:08:09,970 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 116 selfloop transitions, 19 changer transitions 17/161 dead transitions. [2024-06-28 00:08:09,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 161 transitions, 1838 flow [2024-06-28 00:08:09,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:08:09,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:08:09,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 00:08:09,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-28 00:08:09,971 INFO L175 Difference]: Start difference. First operand has 200 places, 143 transitions, 1494 flow. Second operand 8 states and 150 transitions. [2024-06-28 00:08:09,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 161 transitions, 1838 flow [2024-06-28 00:08:10,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 161 transitions, 1778 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 00:08:10,080 INFO L231 Difference]: Finished difference. Result has 199 places, 132 transitions, 1352 flow [2024-06-28 00:08:10,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1352, PETRI_PLACES=199, PETRI_TRANSITIONS=132} [2024-06-28 00:08:10,080 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-28 00:08:10,080 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 132 transitions, 1352 flow [2024-06-28 00:08:10,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:10,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:10,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:10,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-28 00:08:10,081 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:08:10,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:10,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1169319064, now seen corresponding path program 13 times [2024-06-28 00:08:10,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:10,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251372632] [2024-06-28 00:08:10,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:10,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:10,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:10,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:10,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251372632] [2024-06-28 00:08:10,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251372632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:10,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:10,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:08:10,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177871109] [2024-06-28 00:08:10,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:10,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:08:10,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:10,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:08:10,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:08:10,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:08:10,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 132 transitions, 1352 flow. Second operand has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:10,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:10,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:08:10,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:10,842 INFO L124 PetriNetUnfolderBase]: 701/1544 cut-off events. [2024-06-28 00:08:10,842 INFO L125 PetriNetUnfolderBase]: For 65396/65399 co-relation queries the response was YES. [2024-06-28 00:08:10,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7343 conditions, 1544 events. 701/1544 cut-off events. For 65396/65399 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 11424 event pairs, 377 based on Foata normal form. 8/1492 useless extension candidates. Maximal degree in co-relation 7278. Up to 863 conditions per place. [2024-06-28 00:08:10,853 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 102 selfloop transitions, 29 changer transitions 8/148 dead transitions. [2024-06-28 00:08:10,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 148 transitions, 1756 flow [2024-06-28 00:08:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:08:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:08:10,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 00:08:10,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-28 00:08:10,854 INFO L175 Difference]: Start difference. First operand has 199 places, 132 transitions, 1352 flow. Second operand 8 states and 150 transitions. [2024-06-28 00:08:10,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 148 transitions, 1756 flow [2024-06-28 00:08:10,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 148 transitions, 1671 flow, removed 6 selfloop flow, removed 14 redundant places. [2024-06-28 00:08:10,945 INFO L231 Difference]: Finished difference. Result has 184 places, 128 transitions, 1277 flow [2024-06-28 00:08:10,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1277, PETRI_PLACES=184, PETRI_TRANSITIONS=128} [2024-06-28 00:08:10,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-28 00:08:10,946 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 128 transitions, 1277 flow [2024-06-28 00:08:10,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:10,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:10,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:10,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-28 00:08:10,946 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:08:10,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:10,947 INFO L85 PathProgramCache]: Analyzing trace with hash -494654698, now seen corresponding path program 14 times [2024-06-28 00:08:10,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:10,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341992467] [2024-06-28 00:08:10,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:10,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:11,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:11,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:11,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341992467] [2024-06-28 00:08:11,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341992467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:11,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:11,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:08:11,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433216793] [2024-06-28 00:08:11,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:11,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:08:11,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:11,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:08:11,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:08:11,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:08:11,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 128 transitions, 1277 flow. Second operand has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:11,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:11,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:08:11,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:11,725 INFO L124 PetriNetUnfolderBase]: 639/1406 cut-off events. [2024-06-28 00:08:11,725 INFO L125 PetriNetUnfolderBase]: For 53964/53967 co-relation queries the response was YES. [2024-06-28 00:08:11,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6528 conditions, 1406 events. 639/1406 cut-off events. For 53964/53967 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 10007 event pairs, 381 based on Foata normal form. 8/1356 useless extension candidates. Maximal degree in co-relation 6466. Up to 863 conditions per place. [2024-06-28 00:08:11,735 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 100 selfloop transitions, 25 changer transitions 10/144 dead transitions. [2024-06-28 00:08:11,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 144 transitions, 1671 flow [2024-06-28 00:08:11,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:08:11,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:08:11,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 00:08:11,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-28 00:08:11,736 INFO L175 Difference]: Start difference. First operand has 184 places, 128 transitions, 1277 flow. Second operand 8 states and 149 transitions. [2024-06-28 00:08:11,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 144 transitions, 1671 flow [2024-06-28 00:08:11,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 144 transitions, 1593 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 00:08:11,842 INFO L231 Difference]: Finished difference. Result has 182 places, 124 transitions, 1210 flow [2024-06-28 00:08:11,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1210, PETRI_PLACES=182, PETRI_TRANSITIONS=124} [2024-06-28 00:08:11,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-28 00:08:11,842 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 124 transitions, 1210 flow [2024-06-28 00:08:11,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:11,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:11,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:11,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-28 00:08:11,842 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:08:11,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:11,843 INFO L85 PathProgramCache]: Analyzing trace with hash -2019488978, now seen corresponding path program 15 times [2024-06-28 00:08:11,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:11,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492856264] [2024-06-28 00:08:11,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:11,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:12,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:12,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:12,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492856264] [2024-06-28 00:08:12,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492856264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:12,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:12,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:08:12,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045350965] [2024-06-28 00:08:12,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:12,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:08:12,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:12,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:08:12,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:08:12,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:08:12,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 124 transitions, 1210 flow. Second operand has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:12,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:12,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:08:12,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:12,572 INFO L124 PetriNetUnfolderBase]: 592/1301 cut-off events. [2024-06-28 00:08:12,572 INFO L125 PetriNetUnfolderBase]: For 45350/45353 co-relation queries the response was YES. [2024-06-28 00:08:12,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5839 conditions, 1301 events. 592/1301 cut-off events. For 45350/45353 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 9056 event pairs, 349 based on Foata normal form. 8/1253 useless extension candidates. Maximal degree in co-relation 5778. Up to 863 conditions per place. [2024-06-28 00:08:12,581 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 91 selfloop transitions, 20 changer transitions 18/138 dead transitions. [2024-06-28 00:08:12,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 138 transitions, 1496 flow [2024-06-28 00:08:12,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:08:12,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:08:12,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 00:08:12,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 00:08:12,582 INFO L175 Difference]: Start difference. First operand has 182 places, 124 transitions, 1210 flow. Second operand 8 states and 146 transitions. [2024-06-28 00:08:12,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 138 transitions, 1496 flow [2024-06-28 00:08:12,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 138 transitions, 1421 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-28 00:08:12,669 INFO L231 Difference]: Finished difference. Result has 176 places, 114 transitions, 1099 flow [2024-06-28 00:08:12,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1135, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1099, PETRI_PLACES=176, PETRI_TRANSITIONS=114} [2024-06-28 00:08:12,669 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-28 00:08:12,669 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 114 transitions, 1099 flow [2024-06-28 00:08:12,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:12,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:12,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:12,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-28 00:08:12,669 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:08:12,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:12,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1474673482, now seen corresponding path program 16 times [2024-06-28 00:08:12,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:12,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530038388] [2024-06-28 00:08:12,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:12,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:13,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:13,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530038388] [2024-06-28 00:08:13,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530038388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:13,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:13,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:08:13,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548650019] [2024-06-28 00:08:13,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:13,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:08:13,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:13,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:08:13,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:08:13,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:08:13,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 114 transitions, 1099 flow. Second operand has 10 states, 10 states have (on average 13.9) internal successors, (139), 10 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:13,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:13,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:08:13,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:13,604 INFO L124 PetriNetUnfolderBase]: 530/1153 cut-off events. [2024-06-28 00:08:13,604 INFO L125 PetriNetUnfolderBase]: For 34592/34592 co-relation queries the response was YES. [2024-06-28 00:08:13,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4982 conditions, 1153 events. 530/1153 cut-off events. For 34592/34592 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 7873 event pairs, 156 based on Foata normal form. 8/1113 useless extension candidates. Maximal degree in co-relation 4923. Up to 751 conditions per place. [2024-06-28 00:08:13,611 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 101 selfloop transitions, 6 changer transitions 25/141 dead transitions. [2024-06-28 00:08:13,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 141 transitions, 1429 flow [2024-06-28 00:08:13,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:08:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:08:13,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 00:08:13,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-28 00:08:13,612 INFO L175 Difference]: Start difference. First operand has 176 places, 114 transitions, 1099 flow. Second operand 9 states and 169 transitions. [2024-06-28 00:08:13,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 141 transitions, 1429 flow [2024-06-28 00:08:13,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 141 transitions, 1357 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-28 00:08:13,672 INFO L231 Difference]: Finished difference. Result has 165 places, 105 transitions, 953 flow [2024-06-28 00:08:13,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1033, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=953, PETRI_PLACES=165, PETRI_TRANSITIONS=105} [2024-06-28 00:08:13,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-28 00:08:13,673 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 105 transitions, 953 flow [2024-06-28 00:08:13,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.9) internal successors, (139), 10 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:13,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:13,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:13,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-28 00:08:13,673 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:08:13,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:13,673 INFO L85 PathProgramCache]: Analyzing trace with hash -96221690, now seen corresponding path program 17 times [2024-06-28 00:08:13,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:13,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166643067] [2024-06-28 00:08:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:13,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:14,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:14,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166643067] [2024-06-28 00:08:14,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166643067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:14,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:14,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:08:14,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006029824] [2024-06-28 00:08:14,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:14,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:08:14,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:14,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:08:14,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:08:14,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:08:14,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 105 transitions, 953 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:14,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:14,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:08:14,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:14,291 INFO L124 PetriNetUnfolderBase]: 528/1143 cut-off events. [2024-06-28 00:08:14,292 INFO L125 PetriNetUnfolderBase]: For 38906/38906 co-relation queries the response was YES. [2024-06-28 00:08:14,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5054 conditions, 1143 events. 528/1143 cut-off events. For 38906/38906 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 7888 event pairs, 92 based on Foata normal form. 8/1121 useless extension candidates. Maximal degree in co-relation 4999. Up to 414 conditions per place. [2024-06-28 00:08:14,299 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 67 selfloop transitions, 34 changer transitions 19/129 dead transitions. [2024-06-28 00:08:14,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 129 transitions, 1358 flow [2024-06-28 00:08:14,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:08:14,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:08:14,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-28 00:08:14,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-28 00:08:14,300 INFO L175 Difference]: Start difference. First operand has 165 places, 105 transitions, 953 flow. Second operand 7 states and 138 transitions. [2024-06-28 00:08:14,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 129 transitions, 1358 flow [2024-06-28 00:08:14,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 129 transitions, 1307 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-28 00:08:14,360 INFO L231 Difference]: Finished difference. Result has 151 places, 93 transitions, 861 flow [2024-06-28 00:08:14,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=861, PETRI_PLACES=151, PETRI_TRANSITIONS=93} [2024-06-28 00:08:14,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-28 00:08:14,361 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 93 transitions, 861 flow [2024-06-28 00:08:14,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:14,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:14,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:14,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-28 00:08:14,361 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:08:14,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:14,362 INFO L85 PathProgramCache]: Analyzing trace with hash 407345564, now seen corresponding path program 18 times [2024-06-28 00:08:14,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:14,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614277071] [2024-06-28 00:08:14,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:14,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:14,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:14,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614277071] [2024-06-28 00:08:14,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614277071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:14,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:14,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:08:14,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950644518] [2024-06-28 00:08:14,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:14,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:08:14,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:14,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:08:14,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:08:14,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:08:14,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 93 transitions, 861 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:14,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:14,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:08:14,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:14,951 INFO L124 PetriNetUnfolderBase]: 404/877 cut-off events. [2024-06-28 00:08:14,952 INFO L125 PetriNetUnfolderBase]: For 26877/26877 co-relation queries the response was YES. [2024-06-28 00:08:14,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3941 conditions, 877 events. 404/877 cut-off events. For 26877/26877 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5611 event pairs, 98 based on Foata normal form. 8/857 useless extension candidates. Maximal degree in co-relation 3889. Up to 392 conditions per place. [2024-06-28 00:08:14,957 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 63 selfloop transitions, 18 changer transitions 24/114 dead transitions. [2024-06-28 00:08:14,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 114 transitions, 1197 flow [2024-06-28 00:08:14,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:08:14,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:08:14,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-28 00:08:14,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-28 00:08:14,957 INFO L175 Difference]: Start difference. First operand has 151 places, 93 transitions, 861 flow. Second operand 7 states and 137 transitions. [2024-06-28 00:08:14,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 114 transitions, 1197 flow [2024-06-28 00:08:15,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 114 transitions, 1096 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-28 00:08:15,002 INFO L231 Difference]: Finished difference. Result has 148 places, 73 transitions, 621 flow [2024-06-28 00:08:15,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=621, PETRI_PLACES=148, PETRI_TRANSITIONS=73} [2024-06-28 00:08:15,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-28 00:08:15,003 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 73 transitions, 621 flow [2024-06-28 00:08:15,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:15,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:15,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:15,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-28 00:08:15,004 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:08:15,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:15,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1748427008, now seen corresponding path program 19 times [2024-06-28 00:08:15,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:15,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248502476] [2024-06-28 00:08:15,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:15,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:15,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:15,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:15,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248502476] [2024-06-28 00:08:15,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248502476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:15,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:15,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:08:15,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47311337] [2024-06-28 00:08:15,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:15,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:08:15,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:15,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:08:15,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:08:15,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:08:15,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 73 transitions, 621 flow. Second operand has 10 states, 10 states have (on average 13.9) internal successors, (139), 10 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:15,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:15,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:08:15,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:15,846 INFO L124 PetriNetUnfolderBase]: 338/737 cut-off events. [2024-06-28 00:08:15,847 INFO L125 PetriNetUnfolderBase]: For 26481/26481 co-relation queries the response was YES. [2024-06-28 00:08:15,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3307 conditions, 737 events. 338/737 cut-off events. For 26481/26481 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4553 event pairs, 106 based on Foata normal form. 8/719 useless extension candidates. Maximal degree in co-relation 3257. Up to 413 conditions per place. [2024-06-28 00:08:15,851 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 51 selfloop transitions, 11 changer transitions 22/93 dead transitions. [2024-06-28 00:08:15,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 93 transitions, 833 flow [2024-06-28 00:08:15,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:08:15,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:08:15,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 00:08:15,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-28 00:08:15,852 INFO L175 Difference]: Start difference. First operand has 148 places, 73 transitions, 621 flow. Second operand 8 states and 150 transitions. [2024-06-28 00:08:15,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 93 transitions, 833 flow [2024-06-28 00:08:15,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 93 transitions, 771 flow, removed 16 selfloop flow, removed 18 redundant places. [2024-06-28 00:08:15,877 INFO L231 Difference]: Finished difference. Result has 124 places, 63 transitions, 467 flow [2024-06-28 00:08:15,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=467, PETRI_PLACES=124, PETRI_TRANSITIONS=63} [2024-06-28 00:08:15,877 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-28 00:08:15,877 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 63 transitions, 467 flow [2024-06-28 00:08:15,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.9) internal successors, (139), 10 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:15,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:15,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:15,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-28 00:08:15,877 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:08:15,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:15,878 INFO L85 PathProgramCache]: Analyzing trace with hash 943287366, now seen corresponding path program 20 times [2024-06-28 00:08:15,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:15,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007752438] [2024-06-28 00:08:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:15,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:16,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:16,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007752438] [2024-06-28 00:08:16,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007752438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:16,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:16,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:08:16,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724643159] [2024-06-28 00:08:16,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:16,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:08:16,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:16,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:08:16,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:08:16,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:08:16,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 63 transitions, 467 flow. Second operand has 10 states, 10 states have (on average 13.9) internal successors, (139), 10 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:16,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:16,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:08:16,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:16,758 INFO L124 PetriNetUnfolderBase]: 330/737 cut-off events. [2024-06-28 00:08:16,759 INFO L125 PetriNetUnfolderBase]: For 15139/15139 co-relation queries the response was YES. [2024-06-28 00:08:16,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2948 conditions, 737 events. 330/737 cut-off events. For 15139/15139 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4725 event pairs, 128 based on Foata normal form. 8/715 useless extension candidates. Maximal degree in co-relation 2911. Up to 361 conditions per place. [2024-06-28 00:08:16,762 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 55 selfloop transitions, 8 changer transitions 13/85 dead transitions. [2024-06-28 00:08:16,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 85 transitions, 736 flow [2024-06-28 00:08:16,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:08:16,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:08:16,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 00:08:16,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-28 00:08:16,763 INFO L175 Difference]: Start difference. First operand has 124 places, 63 transitions, 467 flow. Second operand 8 states and 149 transitions. [2024-06-28 00:08:16,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 85 transitions, 736 flow [2024-06-28 00:08:16,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 85 transitions, 679 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-06-28 00:08:16,775 INFO L231 Difference]: Finished difference. Result has 111 places, 56 transitions, 369 flow [2024-06-28 00:08:16,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=369, PETRI_PLACES=111, PETRI_TRANSITIONS=56} [2024-06-28 00:08:16,775 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-28 00:08:16,775 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 56 transitions, 369 flow [2024-06-28 00:08:16,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.9) internal successors, (139), 10 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:16,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:16,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:16,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-28 00:08:16,775 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:08:16,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:16,776 INFO L85 PathProgramCache]: Analyzing trace with hash 2011810798, now seen corresponding path program 21 times [2024-06-28 00:08:16,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:16,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044552561] [2024-06-28 00:08:16,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:16,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:16,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:17,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:17,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044552561] [2024-06-28 00:08:17,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044552561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:17,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:17,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:08:17,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600315428] [2024-06-28 00:08:17,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:17,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:08:17,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:17,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:08:17,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:08:17,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:08:17,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 56 transitions, 369 flow. Second operand has 10 states, 10 states have (on average 13.9) internal successors, (139), 10 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:17,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:17,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:08:17,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:17,567 INFO L124 PetriNetUnfolderBase]: 247/556 cut-off events. [2024-06-28 00:08:17,567 INFO L125 PetriNetUnfolderBase]: For 9509/9509 co-relation queries the response was YES. [2024-06-28 00:08:17,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2099 conditions, 556 events. 247/556 cut-off events. For 9509/9509 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3321 event pairs, 124 based on Foata normal form. 8/538 useless extension candidates. Maximal degree in co-relation 2067. Up to 361 conditions per place. [2024-06-28 00:08:17,569 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 39 selfloop transitions, 4 changer transitions 20/72 dead transitions. [2024-06-28 00:08:17,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 72 transitions, 532 flow [2024-06-28 00:08:17,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:08:17,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:08:17,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 00:08:17,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-28 00:08:17,570 INFO L175 Difference]: Start difference. First operand has 111 places, 56 transitions, 369 flow. Second operand 8 states and 142 transitions. [2024-06-28 00:08:17,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 72 transitions, 532 flow [2024-06-28 00:08:17,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 72 transitions, 501 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-28 00:08:17,578 INFO L231 Difference]: Finished difference. Result has 104 places, 50 transitions, 304 flow [2024-06-28 00:08:17,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=304, PETRI_PLACES=104, PETRI_TRANSITIONS=50} [2024-06-28 00:08:17,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-28 00:08:17,579 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 50 transitions, 304 flow [2024-06-28 00:08:17,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.9) internal successors, (139), 10 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:17,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:17,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:17,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-28 00:08:17,579 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:08:17,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:17,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1545212164, now seen corresponding path program 22 times [2024-06-28 00:08:17,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:17,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996985980] [2024-06-28 00:08:17,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:17,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:17,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:17,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996985980] [2024-06-28 00:08:17,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996985980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:17,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:17,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:08:17,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295537697] [2024-06-28 00:08:17,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:17,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:08:17,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:17,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:08:17,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:08:17,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:08:17,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 50 transitions, 304 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:17,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:17,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:08:17,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:18,075 INFO L124 PetriNetUnfolderBase]: 190/429 cut-off events. [2024-06-28 00:08:18,075 INFO L125 PetriNetUnfolderBase]: For 6051/6051 co-relation queries the response was YES. [2024-06-28 00:08:18,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1520 conditions, 429 events. 190/429 cut-off events. For 6051/6051 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2420 event pairs, 72 based on Foata normal form. 8/418 useless extension candidates. Maximal degree in co-relation 1491. Up to 193 conditions per place. [2024-06-28 00:08:18,077 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 11 changer transitions 9/62 dead transitions. [2024-06-28 00:08:18,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 62 transitions, 434 flow [2024-06-28 00:08:18,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:08:18,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:08:18,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-28 00:08:18,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-28 00:08:18,078 INFO L175 Difference]: Start difference. First operand has 104 places, 50 transitions, 304 flow. Second operand 6 states and 115 transitions. [2024-06-28 00:08:18,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 62 transitions, 434 flow [2024-06-28 00:08:18,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 62 transitions, 417 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-28 00:08:18,083 INFO L231 Difference]: Finished difference. Result has 92 places, 45 transitions, 280 flow [2024-06-28 00:08:18,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=280, PETRI_PLACES=92, PETRI_TRANSITIONS=45} [2024-06-28 00:08:18,083 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-28 00:08:18,083 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 45 transitions, 280 flow [2024-06-28 00:08:18,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:18,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:18,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:18,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-28 00:08:18,083 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:08:18,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:18,084 INFO L85 PathProgramCache]: Analyzing trace with hash 664755310, now seen corresponding path program 23 times [2024-06-28 00:08:18,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:18,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507134211] [2024-06-28 00:08:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:18,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:18,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:18,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507134211] [2024-06-28 00:08:18,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507134211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:18,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:18,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:08:18,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492601132] [2024-06-28 00:08:18,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:18,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:08:18,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:18,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:08:18,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:08:18,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:08:18,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 45 transitions, 280 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:18,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:18,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:08:18,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:18,560 INFO L124 PetriNetUnfolderBase]: 136/311 cut-off events. [2024-06-28 00:08:18,560 INFO L125 PetriNetUnfolderBase]: For 2839/2839 co-relation queries the response was YES. [2024-06-28 00:08:18,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1065 conditions, 311 events. 136/311 cut-off events. For 2839/2839 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1512 event pairs, 36 based on Foata normal form. 8/306 useless extension candidates. Maximal degree in co-relation 1040. Up to 96 conditions per place. [2024-06-28 00:08:18,561 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 26 selfloop transitions, 4 changer transitions 16/55 dead transitions. [2024-06-28 00:08:18,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 55 transitions, 392 flow [2024-06-28 00:08:18,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:08:18,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:08:18,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-28 00:08:18,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-28 00:08:18,562 INFO L175 Difference]: Start difference. First operand has 92 places, 45 transitions, 280 flow. Second operand 7 states and 122 transitions. [2024-06-28 00:08:18,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 55 transitions, 392 flow [2024-06-28 00:08:18,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 55 transitions, 345 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-28 00:08:18,565 INFO L231 Difference]: Finished difference. Result has 85 places, 35 transitions, 176 flow [2024-06-28 00:08:18,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=176, PETRI_PLACES=85, PETRI_TRANSITIONS=35} [2024-06-28 00:08:18,565 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-28 00:08:18,565 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 35 transitions, 176 flow [2024-06-28 00:08:18,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:18,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:18,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:18,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-28 00:08:18,566 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:08:18,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:18,566 INFO L85 PathProgramCache]: Analyzing trace with hash 2107093900, now seen corresponding path program 24 times [2024-06-28 00:08:18,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:18,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085018127] [2024-06-28 00:08:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:18,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:19,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:19,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085018127] [2024-06-28 00:08:19,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085018127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:19,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:19,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:08:19,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638648706] [2024-06-28 00:08:19,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:19,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:08:19,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:19,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:08:19,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:08:19,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:08:19,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 35 transitions, 176 flow. Second operand has 10 states, 10 states have (on average 13.9) internal successors, (139), 10 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:19,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:19,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:08:19,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:19,302 INFO L124 PetriNetUnfolderBase]: 73/178 cut-off events. [2024-06-28 00:08:19,302 INFO L125 PetriNetUnfolderBase]: For 1034/1034 co-relation queries the response was YES. [2024-06-28 00:08:19,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 178 events. 73/178 cut-off events. For 1034/1034 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 686 event pairs, 10 based on Foata normal form. 8/181 useless extension candidates. Maximal degree in co-relation 490. Up to 64 conditions per place. [2024-06-28 00:08:19,303 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 0 selfloop transitions, 0 changer transitions 41/41 dead transitions. [2024-06-28 00:08:19,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 41 transitions, 222 flow [2024-06-28 00:08:19,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:08:19,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:08:19,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 00:08:19,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 00:08:19,303 INFO L175 Difference]: Start difference. First operand has 85 places, 35 transitions, 176 flow. Second operand 8 states and 126 transitions. [2024-06-28 00:08:19,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 41 transitions, 222 flow [2024-06-28 00:08:19,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 41 transitions, 192 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-28 00:08:19,304 INFO L231 Difference]: Finished difference. Result has 68 places, 0 transitions, 0 flow [2024-06-28 00:08:19,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=68, PETRI_TRANSITIONS=0} [2024-06-28 00:08:19,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-28 00:08:19,305 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 0 transitions, 0 flow [2024-06-28 00:08:19,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.9) internal successors, (139), 10 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:19,307 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-28 00:08:19,307 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-28 00:08:19,307 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-28 00:08:19,307 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-28 00:08:19,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-28 00:08:19,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-28 00:08:19,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-28 00:08:19,308 INFO L445 BasicCegarLoop]: Path program histogram: [30, 24, 22, 21, 10, 10, 9, 9, 6, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:19,310 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-28 00:08:19,310 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-28 00:08:19,313 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-28 00:08:19,313 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-28 00:08:19,314 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.06 12:08:19 BasicIcfg [2024-06-28 00:08:19,314 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-28 00:08:19,314 INFO L158 Benchmark]: Toolchain (without parser) took 293614.83ms. Allocated memory was 176.2MB in the beginning and 2.5GB in the end (delta: 2.3GB). Free memory was 112.0MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 926.7MB. Max. memory is 16.1GB. [2024-06-28 00:08:19,315 INFO L158 Benchmark]: Witness Parser took 0.23ms. Allocated memory is still 176.2MB. Free memory is still 138.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-28 00:08:19,315 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 176.2MB. Free memory is still 135.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-28 00:08:19,315 INFO L158 Benchmark]: CACSL2BoogieTranslator took 629.24ms. Allocated memory is still 176.2MB. Free memory was 111.7MB in the beginning and 81.1MB in the end (delta: 30.6MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2024-06-28 00:08:19,315 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.11ms. Allocated memory is still 176.2MB. Free memory was 81.1MB in the beginning and 78.5MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-28 00:08:19,315 INFO L158 Benchmark]: Boogie Preprocessor took 60.00ms. Allocated memory is still 176.2MB. Free memory was 78.5MB in the beginning and 73.9MB in the end (delta: 4.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-28 00:08:19,316 INFO L158 Benchmark]: RCFGBuilder took 991.01ms. Allocated memory was 176.2MB in the beginning and 226.5MB in the end (delta: 50.3MB). Free memory was 73.9MB in the beginning and 96.9MB in the end (delta: -22.9MB). Peak memory consumption was 37.6MB. Max. memory is 16.1GB. [2024-06-28 00:08:19,316 INFO L158 Benchmark]: TraceAbstraction took 291874.47ms. Allocated memory was 226.5MB in the beginning and 2.5GB in the end (delta: 2.3GB). Free memory was 96.9MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 859.8MB. Max. memory is 16.1GB. [2024-06-28 00:08:19,317 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.23ms. Allocated memory is still 176.2MB. Free memory is still 138.3MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.15ms. Allocated memory is still 176.2MB. Free memory is still 135.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 629.24ms. Allocated memory is still 176.2MB. Free memory was 111.7MB in the beginning and 81.1MB in the end (delta: 30.6MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.11ms. Allocated memory is still 176.2MB. Free memory was 81.1MB in the beginning and 78.5MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 60.00ms. Allocated memory is still 176.2MB. Free memory was 78.5MB in the beginning and 73.9MB in the end (delta: 4.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 991.01ms. Allocated memory was 176.2MB in the beginning and 226.5MB in the end (delta: 50.3MB). Free memory was 73.9MB in the beginning and 96.9MB in the end (delta: -22.9MB). Peak memory consumption was 37.6MB. Max. memory is 16.1GB. * TraceAbstraction took 291874.47ms. Allocated memory was 226.5MB in the beginning and 2.5GB in the end (delta: 2.3GB). Free memory was 96.9MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 859.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 853]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 855]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 856]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 67 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 291.7s, OverallIterations: 185, TraceHistogramMax: 1, PathProgramHistogramMax: 30, EmptinessCheckTime: 0.0s, AutomataDifference: 236.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7668 SdHoareTripleChecker+Valid, 25.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7207 mSDsluCounter, 1241 SdHoareTripleChecker+Invalid, 21.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 823 mSDsCounter, 1641 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 35987 IncrementalHoareTripleChecker+Invalid, 37628 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1641 mSolverCounterUnsat, 418 mSDtfsCounter, 35987 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1555 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1552 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 14.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6926occurred in iteration=144, InterpolantAutomatonStates: 1453, 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: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 52.3s InterpolantComputationTime, 3771 NumberOfCodeBlocks, 3771 NumberOfCodeBlocksAsserted, 185 NumberOfCheckSat, 3586 ConstructedInterpolants, 0 QuantifiedInterpolants, 59545 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 185 InterpolantComputations, 185 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-28 00:08:19,338 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