./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 15:56:47,289 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 15:56:47,337 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 15:56:47,340 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 15:56:47,340 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 15:56:47,354 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 15:56:47,356 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 15:56:47,356 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 15:56:47,357 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 15:56:47,357 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 15:56:47,358 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 15:56:47,358 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 15:56:47,359 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 15:56:47,360 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 15:56:47,360 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 15:56:47,361 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 15:56:47,361 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 15:56:47,364 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 15:56:47,364 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 15:56:47,364 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 15:56:47,364 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 15:56:47,365 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 15:56:47,365 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 15:56:47,365 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 15:56:47,365 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 15:56:47,365 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 15:56:47,366 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 15:56:47,366 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 15:56:47,366 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 15:56:47,367 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 15:56:47,367 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 15:56:47,368 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 15:56:47,368 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:56:47,368 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 15:56:47,368 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 15:56:47,368 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 15:56:47,368 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 15:56:47,369 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 15:56:47,369 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 15:56:47,369 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 15:56:47,370 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 15:56:47,370 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 15:56:47,370 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 15:56:47,370 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 15:56:47,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 15:56:47,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 15:56:47,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 15:56:47,611 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 15:56:47,611 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 15:56:47,612 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 15:56:48,603 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 15:56:48,832 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 15:56:48,833 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 15:56:48,857 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ae584aa6/b46b05de6e2b40b4a2e1c8470cedd883/FLAG184f0698e [2024-06-21 15:56:48,890 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ae584aa6/b46b05de6e2b40b4a2e1c8470cedd883 [2024-06-21 15:56:48,892 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 15:56:48,893 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 15:56:48,894 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-21 15:56:48,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 15:56:48,992 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 15:56:48,993 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 15:56:48,993 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 15:56:48,997 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 15:56:48,997 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:56:48" (1/2) ... [2024-06-21 15:56:48,998 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@543f799d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:56:48, skipping insertion in model container [2024-06-21 15:56:48,999 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:56:48" (1/2) ... [2024-06-21 15:56:49,000 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@324c5a38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:56:49, skipping insertion in model container [2024-06-21 15:56:49,000 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:56:48" (2/2) ... [2024-06-21 15:56:49,000 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@543f799d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:49, skipping insertion in model container [2024-06-21 15:56:49,000 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:56:48" (2/2) ... [2024-06-21 15:56:49,001 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 15:56:49,050 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 15:56:49,051 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-21 15:56:49,051 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-21 15:56:49,051 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-21 15:56:49,052 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 15:56:49,052 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-21 15:56:49,087 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 15:56:49,377 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:56:49,385 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 15:56:49,464 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:56:49,493 INFO L206 MainTranslator]: Completed translation [2024-06-21 15:56:49,494 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:49 WrapperNode [2024-06-21 15:56:49,494 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 15:56:49,495 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 15:56:49,495 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 15:56:49,496 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 15:56:49,500 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:49" (1/1) ... [2024-06-21 15:56:49,524 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:49" (1/1) ... [2024-06-21 15:56:49,547 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-21 15:56:49,549 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 15:56:49,550 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 15:56:49,550 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 15:56:49,550 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 15:56:49,558 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:49" (1/1) ... [2024-06-21 15:56:49,559 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:49" (1/1) ... [2024-06-21 15:56:49,570 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:49" (1/1) ... [2024-06-21 15:56:49,584 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 15:56:49,590 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:49" (1/1) ... [2024-06-21 15:56:49,591 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:49" (1/1) ... [2024-06-21 15:56:49,596 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:49" (1/1) ... [2024-06-21 15:56:49,606 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:49" (1/1) ... [2024-06-21 15:56:49,607 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:49" (1/1) ... [2024-06-21 15:56:49,613 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:49" (1/1) ... [2024-06-21 15:56:49,615 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 15:56:49,615 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 15:56:49,616 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 15:56:49,616 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 15:56:49,616 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:49" (1/1) ... [2024-06-21 15:56:49,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:56:49,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 15:56:49,649 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) [2024-06-21 15:56:49,656 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 [2024-06-21 15:56:49,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 15:56:49,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 15:56:49,681 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 15:56:49,681 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 15:56:49,681 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 15:56:49,681 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 15:56:49,681 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 15:56:49,682 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 15:56:49,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 15:56:49,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 15:56:49,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 15:56:49,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 15:56:49,683 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 15:56:49,769 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 15:56:49,771 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 15:56:49,896 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 15:56:49,897 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 15:56:49,986 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 15:56:49,989 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 15:56:49,990 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:56:49 BoogieIcfgContainer [2024-06-21 15:56:49,990 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 15:56:49,993 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 15:56:49,993 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 15:56:49,996 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 15:56:49,996 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 03:56:48" (1/4) ... [2024-06-21 15:56:49,998 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e7949a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 03:56:49, skipping insertion in model container [2024-06-21 15:56:49,999 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:56:48" (2/4) ... [2024-06-21 15:56:49,999 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e7949a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 03:56:49, skipping insertion in model container [2024-06-21 15:56:50,000 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:49" (3/4) ... [2024-06-21 15:56:50,000 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e7949a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 03:56:50, skipping insertion in model container [2024-06-21 15:56:50,000 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:56:49" (4/4) ... [2024-06-21 15:56:50,001 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 15:56:50,013 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 15:56:50,014 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 15:56:50,014 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 15:56:50,056 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 15:56:50,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 15:56:50,120 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 15:56:50,120 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:56:50,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 15:56:50,122 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 15:56:50,125 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 15:56:50,136 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 15:56:50,141 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;@273b1057, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 15:56:50,142 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 15:56:50,145 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 15:56:50,145 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 15:56:50,145 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:56:50,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:50,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 15:56:50,146 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)] === [2024-06-21 15:56:50,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:50,150 INFO L85 PathProgramCache]: Analyzing trace with hash 219069644, now seen corresponding path program 1 times [2024-06-21 15:56:50,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:50,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70668856] [2024-06-21 15:56:50,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:50,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:50,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:50,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70668856] [2024-06-21 15:56:50,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70668856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:50,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:50,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 15:56:50,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968396906] [2024-06-21 15:56:50,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:50,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 15:56:50,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:50,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 15:56:50,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 15:56:50,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 41 [2024-06-21 15:56:50,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:50,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:50,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 41 [2024-06-21 15:56:50,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:50,723 INFO L124 PetriNetUnfolderBase]: 470/794 cut-off events. [2024-06-21 15:56:50,724 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-21 15:56:50,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1593 conditions, 794 events. 470/794 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3834 event pairs, 281 based on Foata normal form. 1/747 useless extension candidates. Maximal degree in co-relation 1581. Up to 736 conditions per place. [2024-06-21 15:56:50,734 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 27 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 15:56:50,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 161 flow [2024-06-21 15:56:50,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 15:56:50,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 15:56:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-06-21 15:56:50,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7154471544715447 [2024-06-21 15:56:50,753 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 88 transitions. [2024-06-21 15:56:50,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 161 flow [2024-06-21 15:56:50,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 156 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 15:56:50,757 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 15:56:50,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-21 15:56:50,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 15:56:50,761 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 15:56:50,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:50,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:50,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:50,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 15:56:50,762 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)] === [2024-06-21 15:56:50,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:50,762 INFO L85 PathProgramCache]: Analyzing trace with hash 73227933, now seen corresponding path program 1 times [2024-06-21 15:56:50,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:50,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802548889] [2024-06-21 15:56:50,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:50,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:50,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:50,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802548889] [2024-06-21 15:56:50,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802548889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:50,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:50,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:56:50,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515201446] [2024-06-21 15:56:50,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:50,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:56:50,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:50,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:56:50,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:56:50,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-21 15:56:50,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:50,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:50,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-21 15:56:50,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:51,079 INFO L124 PetriNetUnfolderBase]: 594/1000 cut-off events. [2024-06-21 15:56:51,079 INFO L125 PetriNetUnfolderBase]: For 220/254 co-relation queries the response was YES. [2024-06-21 15:56:51,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2293 conditions, 1000 events. 594/1000 cut-off events. For 220/254 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5018 event pairs, 319 based on Foata normal form. 3/970 useless extension candidates. Maximal degree in co-relation 2281. Up to 901 conditions per place. [2024-06-21 15:56:51,085 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 38 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-21 15:56:51,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 246 flow [2024-06-21 15:56:51,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:56:51,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:56:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-06-21 15:56:51,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6890243902439024 [2024-06-21 15:56:51,088 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 113 transitions. [2024-06-21 15:56:51,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 246 flow [2024-06-21 15:56:51,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 15:56:51,090 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-21 15:56:51,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-21 15:56:51,090 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-21 15:56:51,091 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-21 15:56:51,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:51,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:51,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:51,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 15:56:51,092 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)] === [2024-06-21 15:56:51,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:51,092 INFO L85 PathProgramCache]: Analyzing trace with hash 627187612, now seen corresponding path program 1 times [2024-06-21 15:56:51,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:51,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103588904] [2024-06-21 15:56:51,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:51,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:51,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:51,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:51,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103588904] [2024-06-21 15:56:51,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103588904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:51,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:51,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:56:51,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251679718] [2024-06-21 15:56:51,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:51,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:56:51,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:51,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:56:51,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:56:51,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:51,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:51,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:51,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:51,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:51,376 INFO L124 PetriNetUnfolderBase]: 793/1310 cut-off events. [2024-06-21 15:56:51,392 INFO L125 PetriNetUnfolderBase]: For 692/726 co-relation queries the response was YES. [2024-06-21 15:56:51,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3343 conditions, 1310 events. 793/1310 cut-off events. For 692/726 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6666 event pairs, 430 based on Foata normal form. 2/1284 useless extension candidates. Maximal degree in co-relation 3328. Up to 1192 conditions per place. [2024-06-21 15:56:51,399 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 42 selfloop transitions, 9 changer transitions 0/62 dead transitions. [2024-06-21 15:56:51,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 325 flow [2024-06-21 15:56:51,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:56:51,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:56:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-21 15:56:51,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6646341463414634 [2024-06-21 15:56:51,400 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 4 states and 109 transitions. [2024-06-21 15:56:51,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 325 flow [2024-06-21 15:56:51,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 323 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 15:56:51,403 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 226 flow [2024-06-21 15:56:51,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2024-06-21 15:56:51,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-21 15:56:51,426 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 226 flow [2024-06-21 15:56:51,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:51,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:51,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:51,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 15:56:51,426 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:51,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:51,427 INFO L85 PathProgramCache]: Analyzing trace with hash 816716713, now seen corresponding path program 1 times [2024-06-21 15:56:51,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:51,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577597745] [2024-06-21 15:56:51,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:51,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:51,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:51,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577597745] [2024-06-21 15:56:51,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577597745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:51,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:51,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:51,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000977816] [2024-06-21 15:56:51,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:51,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:51,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:51,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:51,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:51,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:51,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:51,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:51,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:51,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:51,743 INFO L124 PetriNetUnfolderBase]: 879/1449 cut-off events. [2024-06-21 15:56:51,743 INFO L125 PetriNetUnfolderBase]: For 1441/1449 co-relation queries the response was YES. [2024-06-21 15:56:51,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4154 conditions, 1449 events. 879/1449 cut-off events. For 1441/1449 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7300 event pairs, 265 based on Foata normal form. 12/1454 useless extension candidates. Maximal degree in co-relation 4135. Up to 1266 conditions per place. [2024-06-21 15:56:51,752 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 54 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-06-21 15:56:51,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 79 transitions, 444 flow [2024-06-21 15:56:51,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:56:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:56:51,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 15:56:51,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-21 15:56:51,756 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 226 flow. Second operand 6 states and 158 transitions. [2024-06-21 15:56:51,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 79 transitions, 444 flow [2024-06-21 15:56:51,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 79 transitions, 442 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 15:56:51,763 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 286 flow [2024-06-21 15:56:51,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=286, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-21 15:56:51,764 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-06-21 15:56:51,764 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 286 flow [2024-06-21 15:56:51,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:51,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:51,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:51,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 15:56:51,765 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)] === [2024-06-21 15:56:51,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:51,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2032019753, now seen corresponding path program 1 times [2024-06-21 15:56:51,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:51,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265022009] [2024-06-21 15:56:51,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:51,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:51,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:51,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265022009] [2024-06-21 15:56:51,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265022009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:51,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:51,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:56:51,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625084452] [2024-06-21 15:56:51,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:51,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:56:51,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:51,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:56:51,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:56:51,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:51,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 286 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:51,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:51,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:51,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:52,026 INFO L124 PetriNetUnfolderBase]: 799/1347 cut-off events. [2024-06-21 15:56:52,026 INFO L125 PetriNetUnfolderBase]: For 2272/2279 co-relation queries the response was YES. [2024-06-21 15:56:52,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4265 conditions, 1347 events. 799/1347 cut-off events. For 2272/2279 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6920 event pairs, 329 based on Foata normal form. 4/1329 useless extension candidates. Maximal degree in co-relation 4242. Up to 1174 conditions per place. [2024-06-21 15:56:52,035 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 43 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2024-06-21 15:56:52,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 65 transitions, 423 flow [2024-06-21 15:56:52,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:56:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:56:52,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-06-21 15:56:52,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-21 15:56:52,037 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 286 flow. Second operand 4 states and 106 transitions. [2024-06-21 15:56:52,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 65 transitions, 423 flow [2024-06-21 15:56:52,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 65 transitions, 394 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 15:56:52,043 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 288 flow [2024-06-21 15:56:52,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=288, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-21 15:56:52,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-21 15:56:52,045 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 288 flow [2024-06-21 15:56:52,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:52,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:52,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:52,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 15:56:52,049 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)] === [2024-06-21 15:56:52,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:52,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1425222715, now seen corresponding path program 1 times [2024-06-21 15:56:52,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:52,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747975585] [2024-06-21 15:56:52,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:52,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:52,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:52,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747975585] [2024-06-21 15:56:52,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747975585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:52,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:52,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:56:52,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584993358] [2024-06-21 15:56:52,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:52,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:56:52,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:52,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:56:52,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:56:52,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:52,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 288 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) [2024-06-21 15:56:52,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:52,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:52,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:52,309 INFO L124 PetriNetUnfolderBase]: 909/1482 cut-off events. [2024-06-21 15:56:52,310 INFO L125 PetriNetUnfolderBase]: For 2763/2769 co-relation queries the response was YES. [2024-06-21 15:56:52,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4783 conditions, 1482 events. 909/1482 cut-off events. For 2763/2769 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7340 event pairs, 335 based on Foata normal form. 3/1481 useless extension candidates. Maximal degree in co-relation 4759. Up to 1301 conditions per place. [2024-06-21 15:56:52,319 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 59 selfloop transitions, 16 changer transitions 0/83 dead transitions. [2024-06-21 15:56:52,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 83 transitions, 547 flow [2024-06-21 15:56:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:56:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:56:52,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-21 15:56:52,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6487804878048781 [2024-06-21 15:56:52,320 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 288 flow. Second operand 5 states and 133 transitions. [2024-06-21 15:56:52,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 83 transitions, 547 flow [2024-06-21 15:56:52,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 83 transitions, 537 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-21 15:56:52,324 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 374 flow [2024-06-21 15:56:52,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=374, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-21 15:56:52,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-21 15:56:52,325 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 374 flow [2024-06-21 15:56:52,325 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) [2024-06-21 15:56:52,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:52,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:52,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 15:56:52,326 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)] === [2024-06-21 15:56:52,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:52,326 INFO L85 PathProgramCache]: Analyzing trace with hash 2119167325, now seen corresponding path program 2 times [2024-06-21 15:56:52,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:52,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329180910] [2024-06-21 15:56:52,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:52,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:52,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:52,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329180910] [2024-06-21 15:56:52,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329180910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:52,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:52,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:56:52,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063346853] [2024-06-21 15:56:52,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:52,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:56:52,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:52,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:56:52,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:56:52,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:52,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 374 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) [2024-06-21 15:56:52,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:52,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:52,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:52,561 INFO L124 PetriNetUnfolderBase]: 904/1463 cut-off events. [2024-06-21 15:56:52,561 INFO L125 PetriNetUnfolderBase]: For 4142/4142 co-relation queries the response was YES. [2024-06-21 15:56:52,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5266 conditions, 1463 events. 904/1463 cut-off events. For 4142/4142 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7208 event pairs, 354 based on Foata normal form. 2/1456 useless extension candidates. Maximal degree in co-relation 5239. Up to 1298 conditions per place. [2024-06-21 15:56:52,602 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 55 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-21 15:56:52,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 82 transitions, 608 flow [2024-06-21 15:56:52,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:56:52,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:56:52,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-21 15:56:52,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-21 15:56:52,603 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 374 flow. Second operand 5 states and 129 transitions. [2024-06-21 15:56:52,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 82 transitions, 608 flow [2024-06-21 15:56:52,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 82 transitions, 588 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-21 15:56:52,608 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 422 flow [2024-06-21 15:56:52,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=422, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-21 15:56:52,609 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-21 15:56:52,609 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 422 flow [2024-06-21 15:56:52,609 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) [2024-06-21 15:56:52,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:52,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:52,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 15:56:52,610 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)] === [2024-06-21 15:56:52,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:52,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1904931882, now seen corresponding path program 1 times [2024-06-21 15:56:52,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:52,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089399977] [2024-06-21 15:56:52,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:52,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:52,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:52,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089399977] [2024-06-21 15:56:52,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089399977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:52,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:52,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:56:52,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78200635] [2024-06-21 15:56:52,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:52,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:56:52,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:52,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:56:52,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:56:52,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:52,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 422 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:52,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:52,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:52,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:52,871 INFO L124 PetriNetUnfolderBase]: 915/1499 cut-off events. [2024-06-21 15:56:52,871 INFO L125 PetriNetUnfolderBase]: For 5145/5151 co-relation queries the response was YES. [2024-06-21 15:56:52,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5640 conditions, 1499 events. 915/1499 cut-off events. For 5145/5151 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7483 event pairs, 342 based on Foata normal form. 3/1498 useless extension candidates. Maximal degree in co-relation 5611. Up to 1310 conditions per place. [2024-06-21 15:56:52,880 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 59 selfloop transitions, 21 changer transitions 0/88 dead transitions. [2024-06-21 15:56:52,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 88 transitions, 683 flow [2024-06-21 15:56:52,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:56:52,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:56:52,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-21 15:56:52,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6487804878048781 [2024-06-21 15:56:52,885 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 422 flow. Second operand 5 states and 133 transitions. [2024-06-21 15:56:52,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 88 transitions, 683 flow [2024-06-21 15:56:52,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 653 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 15:56:52,891 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 466 flow [2024-06-21 15:56:52,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=466, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2024-06-21 15:56:52,892 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-21 15:56:52,892 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 466 flow [2024-06-21 15:56:52,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:52,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:52,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:52,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 15:56:52,893 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)] === [2024-06-21 15:56:52,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:52,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1269945300, now seen corresponding path program 2 times [2024-06-21 15:56:52,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:52,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295528054] [2024-06-21 15:56:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:52,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:52,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:52,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295528054] [2024-06-21 15:56:52,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295528054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:52,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:52,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:56:52,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182991251] [2024-06-21 15:56:52,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:52,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:56:52,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:52,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:56:52,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:56:52,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:52,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 466 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:52,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:52,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:52,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:53,125 INFO L124 PetriNetUnfolderBase]: 910/1488 cut-off events. [2024-06-21 15:56:53,125 INFO L125 PetriNetUnfolderBase]: For 6269/6275 co-relation queries the response was YES. [2024-06-21 15:56:53,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5734 conditions, 1488 events. 910/1488 cut-off events. For 6269/6275 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7397 event pairs, 353 based on Foata normal form. 6/1487 useless extension candidates. Maximal degree in co-relation 5703. Up to 1305 conditions per place. [2024-06-21 15:56:53,134 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 55 selfloop transitions, 21 changer transitions 0/84 dead transitions. [2024-06-21 15:56:53,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 84 transitions, 664 flow [2024-06-21 15:56:53,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:56:53,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:56:53,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 15:56:53,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-21 15:56:53,135 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 466 flow. Second operand 5 states and 127 transitions. [2024-06-21 15:56:53,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 84 transitions, 664 flow [2024-06-21 15:56:53,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 84 transitions, 637 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 15:56:53,141 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 497 flow [2024-06-21 15:56:53,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=497, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-06-21 15:56:53,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-21 15:56:53,142 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 497 flow [2024-06-21 15:56:53,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:53,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:53,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:53,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 15:56:53,143 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)] === [2024-06-21 15:56:53,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:53,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1269955220, now seen corresponding path program 1 times [2024-06-21 15:56:53,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:53,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107429444] [2024-06-21 15:56:53,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:53,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:53,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:53,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:53,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107429444] [2024-06-21 15:56:53,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107429444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:53,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:53,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:56:53,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999923134] [2024-06-21 15:56:53,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:53,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:56:53,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:53,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:56:53,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:56:53,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:53,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 497 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:53,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:53,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:53,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:53,381 INFO L124 PetriNetUnfolderBase]: 810/1377 cut-off events. [2024-06-21 15:56:53,381 INFO L125 PetriNetUnfolderBase]: For 7364/7370 co-relation queries the response was YES. [2024-06-21 15:56:53,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5446 conditions, 1377 events. 810/1377 cut-off events. For 7364/7370 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7055 event pairs, 291 based on Foata normal form. 8/1370 useless extension candidates. Maximal degree in co-relation 5414. Up to 1169 conditions per place. [2024-06-21 15:56:53,389 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 63 selfloop transitions, 11 changer transitions 0/87 dead transitions. [2024-06-21 15:56:53,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 87 transitions, 697 flow [2024-06-21 15:56:53,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:56:53,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:56:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-21 15:56:53,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-21 15:56:53,390 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 497 flow. Second operand 5 states and 129 transitions. [2024-06-21 15:56:53,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 87 transitions, 697 flow [2024-06-21 15:56:53,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 87 transitions, 669 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 15:56:53,397 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 514 flow [2024-06-21 15:56:53,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=514, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-06-21 15:56:53,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-21 15:56:53,397 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 514 flow [2024-06-21 15:56:53,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:53,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:53,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:53,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 15:56:53,398 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)] === [2024-06-21 15:56:53,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:53,399 INFO L85 PathProgramCache]: Analyzing trace with hash -2098789456, now seen corresponding path program 1 times [2024-06-21 15:56:53,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:53,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342141254] [2024-06-21 15:56:53,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:53,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:53,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:53,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342141254] [2024-06-21 15:56:53,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342141254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:53,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:53,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:53,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076614863] [2024-06-21 15:56:53,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:53,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:53,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:53,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:53,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:53,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:53,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 514 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:53,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:53,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:53,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:53,694 INFO L124 PetriNetUnfolderBase]: 942/1551 cut-off events. [2024-06-21 15:56:53,695 INFO L125 PetriNetUnfolderBase]: For 8691/8691 co-relation queries the response was YES. [2024-06-21 15:56:53,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6274 conditions, 1551 events. 942/1551 cut-off events. For 8691/8691 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7842 event pairs, 268 based on Foata normal form. 3/1552 useless extension candidates. Maximal degree in co-relation 6240. Up to 1354 conditions per place. [2024-06-21 15:56:53,703 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 81 selfloop transitions, 22 changer transitions 0/111 dead transitions. [2024-06-21 15:56:53,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 111 transitions, 896 flow [2024-06-21 15:56:53,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:53,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:53,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 15:56:53,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-21 15:56:53,705 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 514 flow. Second operand 7 states and 181 transitions. [2024-06-21 15:56:53,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 111 transitions, 896 flow [2024-06-21 15:56:53,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 111 transitions, 869 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 15:56:53,714 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 607 flow [2024-06-21 15:56:53,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=607, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-06-21 15:56:53,714 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-21 15:56:53,715 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 607 flow [2024-06-21 15:56:53,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:53,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:53,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:53,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 15:56:53,715 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)] === [2024-06-21 15:56:53,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:53,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1107657944, now seen corresponding path program 2 times [2024-06-21 15:56:53,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:53,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962007612] [2024-06-21 15:56:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:53,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:53,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:53,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:53,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962007612] [2024-06-21 15:56:53,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962007612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:53,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:53,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:53,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28166449] [2024-06-21 15:56:53,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:53,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:53,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:53,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:53,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:53,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:53,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 607 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:53,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:53,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:53,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:54,021 INFO L124 PetriNetUnfolderBase]: 953/1582 cut-off events. [2024-06-21 15:56:54,021 INFO L125 PetriNetUnfolderBase]: For 10898/10904 co-relation queries the response was YES. [2024-06-21 15:56:54,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6967 conditions, 1582 events. 953/1582 cut-off events. For 10898/10904 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8020 event pairs, 303 based on Foata normal form. 3/1581 useless extension candidates. Maximal degree in co-relation 6931. Up to 1283 conditions per place. [2024-06-21 15:56:54,030 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 76 selfloop transitions, 32 changer transitions 0/116 dead transitions. [2024-06-21 15:56:54,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 116 transitions, 1043 flow [2024-06-21 15:56:54,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:56:54,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:56:54,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 15:56:54,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-21 15:56:54,031 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 607 flow. Second operand 6 states and 157 transitions. [2024-06-21 15:56:54,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 116 transitions, 1043 flow [2024-06-21 15:56:54,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 116 transitions, 969 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 15:56:54,042 INFO L231 Difference]: Finished difference. Result has 85 places, 91 transitions, 760 flow [2024-06-21 15:56:54,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=760, PETRI_PLACES=85, PETRI_TRANSITIONS=91} [2024-06-21 15:56:54,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-21 15:56:54,043 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 91 transitions, 760 flow [2024-06-21 15:56:54,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:54,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:54,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:54,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 15:56:54,044 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)] === [2024-06-21 15:56:54,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:54,044 INFO L85 PathProgramCache]: Analyzing trace with hash 705318268, now seen corresponding path program 3 times [2024-06-21 15:56:54,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:54,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209391914] [2024-06-21 15:56:54,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:54,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:54,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:54,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:54,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209391914] [2024-06-21 15:56:54,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209391914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:54,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:54,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:54,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172002770] [2024-06-21 15:56:54,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:54,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:54,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:54,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:54,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:54,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:54,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 91 transitions, 760 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:54,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:54,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:54,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:54,299 INFO L124 PetriNetUnfolderBase]: 948/1553 cut-off events. [2024-06-21 15:56:54,299 INFO L125 PetriNetUnfolderBase]: For 13392/13392 co-relation queries the response was YES. [2024-06-21 15:56:54,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7371 conditions, 1553 events. 948/1553 cut-off events. For 13392/13392 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7817 event pairs, 329 based on Foata normal form. 2/1539 useless extension candidates. Maximal degree in co-relation 7332. Up to 1280 conditions per place. [2024-06-21 15:56:54,330 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 71 selfloop transitions, 36 changer transitions 0/115 dead transitions. [2024-06-21 15:56:54,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 115 transitions, 1110 flow [2024-06-21 15:56:54,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:56:54,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:56:54,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 15:56:54,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 15:56:54,332 INFO L175 Difference]: Start difference. First operand has 85 places, 91 transitions, 760 flow. Second operand 6 states and 153 transitions. [2024-06-21 15:56:54,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 115 transitions, 1110 flow [2024-06-21 15:56:54,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 115 transitions, 1074 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-21 15:56:54,343 INFO L231 Difference]: Finished difference. Result has 90 places, 94 transitions, 842 flow [2024-06-21 15:56:54,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=842, PETRI_PLACES=90, PETRI_TRANSITIONS=94} [2024-06-21 15:56:54,344 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-21 15:56:54,344 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 94 transitions, 842 flow [2024-06-21 15:56:54,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:54,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:54,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:54,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 15:56:54,345 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:54,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:54,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1882266731, now seen corresponding path program 1 times [2024-06-21 15:56:54,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:54,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124719556] [2024-06-21 15:56:54,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:54,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:54,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:54,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124719556] [2024-06-21 15:56:54,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124719556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:54,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:54,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:54,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284146103] [2024-06-21 15:56:54,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:54,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:54,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:54,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:54,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:54,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-21 15:56:54,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 94 transitions, 842 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:54,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:54,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-21 15:56:54,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:54,671 INFO L124 PetriNetUnfolderBase]: 1082/1797 cut-off events. [2024-06-21 15:56:54,671 INFO L125 PetriNetUnfolderBase]: For 17197/17203 co-relation queries the response was YES. [2024-06-21 15:56:54,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8954 conditions, 1797 events. 1082/1797 cut-off events. For 17197/17203 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9317 event pairs, 305 based on Foata normal form. 5/1798 useless extension candidates. Maximal degree in co-relation 8912. Up to 1374 conditions per place. [2024-06-21 15:56:54,682 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 86 selfloop transitions, 68 changer transitions 0/161 dead transitions. [2024-06-21 15:56:54,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 161 transitions, 1780 flow [2024-06-21 15:56:54,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:56:54,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:56:54,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 15:56:54,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-21 15:56:54,684 INFO L175 Difference]: Start difference. First operand has 90 places, 94 transitions, 842 flow. Second operand 6 states and 151 transitions. [2024-06-21 15:56:54,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 161 transitions, 1780 flow [2024-06-21 15:56:54,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 161 transitions, 1652 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 15:56:54,702 INFO L231 Difference]: Finished difference. Result has 95 places, 134 transitions, 1408 flow [2024-06-21 15:56:54,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1408, PETRI_PLACES=95, PETRI_TRANSITIONS=134} [2024-06-21 15:56:54,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-21 15:56:54,703 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 134 transitions, 1408 flow [2024-06-21 15:56:54,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:54,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:54,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:54,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 15:56:54,704 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)] === [2024-06-21 15:56:54,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:54,704 INFO L85 PathProgramCache]: Analyzing trace with hash 160726859, now seen corresponding path program 2 times [2024-06-21 15:56:54,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:54,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974759893] [2024-06-21 15:56:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:54,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:54,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:54,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974759893] [2024-06-21 15:56:54,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974759893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:54,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:54,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:54,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44360478] [2024-06-21 15:56:54,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:54,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:54,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:54,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:54,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:54,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:54,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 134 transitions, 1408 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:54,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:54,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:54,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:55,074 INFO L124 PetriNetUnfolderBase]: 1071/1780 cut-off events. [2024-06-21 15:56:55,074 INFO L125 PetriNetUnfolderBase]: For 19042/19042 co-relation queries the response was YES. [2024-06-21 15:56:55,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9217 conditions, 1780 events. 1071/1780 cut-off events. For 19042/19042 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9188 event pairs, 297 based on Foata normal form. 4/1782 useless extension candidates. Maximal degree in co-relation 9172. Up to 1505 conditions per place. [2024-06-21 15:56:55,086 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 121 selfloop transitions, 39 changer transitions 0/168 dead transitions. [2024-06-21 15:56:55,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 168 transitions, 1874 flow [2024-06-21 15:56:55,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:55,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:55,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 15:56:55,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-21 15:56:55,087 INFO L175 Difference]: Start difference. First operand has 95 places, 134 transitions, 1408 flow. Second operand 7 states and 179 transitions. [2024-06-21 15:56:55,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 168 transitions, 1874 flow [2024-06-21 15:56:55,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 168 transitions, 1789 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 15:56:55,111 INFO L231 Difference]: Finished difference. Result has 100 places, 134 transitions, 1422 flow [2024-06-21 15:56:55,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1325, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1422, PETRI_PLACES=100, PETRI_TRANSITIONS=134} [2024-06-21 15:56:55,112 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-21 15:56:55,112 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 134 transitions, 1422 flow [2024-06-21 15:56:55,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:55,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:55,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:55,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 15:56:55,112 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:55,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:55,113 INFO L85 PathProgramCache]: Analyzing trace with hash 166440779, now seen corresponding path program 3 times [2024-06-21 15:56:55,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:55,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309708501] [2024-06-21 15:56:55,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:55,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:55,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:55,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309708501] [2024-06-21 15:56:55,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309708501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:55,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:55,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:55,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621599699] [2024-06-21 15:56:55,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:55,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:55,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:55,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:55,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:55,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:55,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 134 transitions, 1422 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:55,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:55,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:55,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:55,412 INFO L124 PetriNetUnfolderBase]: 1122/1870 cut-off events. [2024-06-21 15:56:55,412 INFO L125 PetriNetUnfolderBase]: For 22398/22406 co-relation queries the response was YES. [2024-06-21 15:56:55,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9829 conditions, 1870 events. 1122/1870 cut-off events. For 22398/22406 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9821 event pairs, 312 based on Foata normal form. 4/1870 useless extension candidates. Maximal degree in co-relation 9783. Up to 1418 conditions per place. [2024-06-21 15:56:55,423 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 85 selfloop transitions, 83 changer transitions 0/176 dead transitions. [2024-06-21 15:56:55,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 176 transitions, 2156 flow [2024-06-21 15:56:55,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:56:55,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:56:55,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 15:56:55,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-21 15:56:55,425 INFO L175 Difference]: Start difference. First operand has 100 places, 134 transitions, 1422 flow. Second operand 6 states and 159 transitions. [2024-06-21 15:56:55,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 176 transitions, 2156 flow [2024-06-21 15:56:55,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 176 transitions, 2078 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 15:56:55,451 INFO L231 Difference]: Finished difference. Result has 100 places, 149 transitions, 1719 flow [2024-06-21 15:56:55,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1719, PETRI_PLACES=100, PETRI_TRANSITIONS=149} [2024-06-21 15:56:55,451 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-21 15:56:55,451 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 149 transitions, 1719 flow [2024-06-21 15:56:55,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:55,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:55,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:55,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 15:56:55,452 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:55,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:55,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1236250279, now seen corresponding path program 4 times [2024-06-21 15:56:55,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:55,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075505820] [2024-06-21 15:56:55,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:55,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:55,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:55,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075505820] [2024-06-21 15:56:55,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075505820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:55,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:55,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:55,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146910709] [2024-06-21 15:56:55,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:55,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:55,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:55,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:55,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:55,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:55,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 149 transitions, 1719 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:55,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:55,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:55,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:55,806 INFO L124 PetriNetUnfolderBase]: 1147/1909 cut-off events. [2024-06-21 15:56:55,807 INFO L125 PetriNetUnfolderBase]: For 25485/25499 co-relation queries the response was YES. [2024-06-21 15:56:55,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10408 conditions, 1909 events. 1147/1909 cut-off events. For 25485/25499 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10020 event pairs, 315 based on Foata normal form. 4/1907 useless extension candidates. Maximal degree in co-relation 10361. Up to 1446 conditions per place. [2024-06-21 15:56:55,819 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 88 selfloop transitions, 90 changer transitions 0/186 dead transitions. [2024-06-21 15:56:55,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 186 transitions, 2361 flow [2024-06-21 15:56:55,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 15:56:55,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-21 15:56:55,821 INFO L175 Difference]: Start difference. First operand has 100 places, 149 transitions, 1719 flow. Second operand 7 states and 179 transitions. [2024-06-21 15:56:55,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 186 transitions, 2361 flow [2024-06-21 15:56:55,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 186 transitions, 2226 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-21 15:56:55,853 INFO L231 Difference]: Finished difference. Result has 105 places, 158 transitions, 1911 flow [2024-06-21 15:56:55,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1593, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1911, PETRI_PLACES=105, PETRI_TRANSITIONS=158} [2024-06-21 15:56:55,853 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-21 15:56:55,853 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 158 transitions, 1911 flow [2024-06-21 15:56:55,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:55,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:55,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:55,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 15:56:55,854 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:55,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:55,854 INFO L85 PathProgramCache]: Analyzing trace with hash 166448715, now seen corresponding path program 1 times [2024-06-21 15:56:55,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:55,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683374881] [2024-06-21 15:56:55,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:55,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:55,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:55,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683374881] [2024-06-21 15:56:55,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683374881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:55,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:55,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:55,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411385776] [2024-06-21 15:56:55,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:55,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:55,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:55,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:55,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:55,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:55,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 158 transitions, 1911 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:55,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:55,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:55,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:56,179 INFO L124 PetriNetUnfolderBase]: 1164/1940 cut-off events. [2024-06-21 15:56:56,179 INFO L125 PetriNetUnfolderBase]: For 28985/28991 co-relation queries the response was YES. [2024-06-21 15:56:56,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10657 conditions, 1940 events. 1164/1940 cut-off events. For 28985/28991 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10257 event pairs, 315 based on Foata normal form. 5/1941 useless extension candidates. Maximal degree in co-relation 10609. Up to 1616 conditions per place. [2024-06-21 15:56:56,192 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 137 selfloop transitions, 40 changer transitions 0/185 dead transitions. [2024-06-21 15:56:56,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 185 transitions, 2369 flow [2024-06-21 15:56:56,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:56:56,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:56:56,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 15:56:56,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 15:56:56,194 INFO L175 Difference]: Start difference. First operand has 105 places, 158 transitions, 1911 flow. Second operand 6 states and 153 transitions. [2024-06-21 15:56:56,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 185 transitions, 2369 flow [2024-06-21 15:56:56,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 185 transitions, 2147 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 15:56:56,225 INFO L231 Difference]: Finished difference. Result has 106 places, 160 transitions, 1802 flow [2024-06-21 15:56:56,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1802, PETRI_PLACES=106, PETRI_TRANSITIONS=160} [2024-06-21 15:56:56,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-21 15:56:56,225 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 160 transitions, 1802 flow [2024-06-21 15:56:56,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:56,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:56,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:56,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 15:56:56,226 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:56,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:56,226 INFO L85 PathProgramCache]: Analyzing trace with hash 788836017, now seen corresponding path program 5 times [2024-06-21 15:56:56,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:56,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176202230] [2024-06-21 15:56:56,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:56,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:56,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:56,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:56,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176202230] [2024-06-21 15:56:56,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176202230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:56,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:56,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:56,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920305446] [2024-06-21 15:56:56,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:56,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:56,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:56,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:56,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:56,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:56,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 160 transitions, 1802 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:56,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:56,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:56,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:56,529 INFO L124 PetriNetUnfolderBase]: 1156/1922 cut-off events. [2024-06-21 15:56:56,529 INFO L125 PetriNetUnfolderBase]: For 29884/29890 co-relation queries the response was YES. [2024-06-21 15:56:56,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10539 conditions, 1922 events. 1156/1922 cut-off events. For 29884/29890 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10119 event pairs, 331 based on Foata normal form. 7/1910 useless extension candidates. Maximal degree in co-relation 10490. Up to 1465 conditions per place. [2024-06-21 15:56:56,541 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 83 selfloop transitions, 93 changer transitions 0/184 dead transitions. [2024-06-21 15:56:56,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 184 transitions, 2328 flow [2024-06-21 15:56:56,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:56:56,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:56:56,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 15:56:56,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 15:56:56,543 INFO L175 Difference]: Start difference. First operand has 106 places, 160 transitions, 1802 flow. Second operand 6 states and 153 transitions. [2024-06-21 15:56:56,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 184 transitions, 2328 flow [2024-06-21 15:56:56,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 184 transitions, 2229 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 15:56:56,577 INFO L231 Difference]: Finished difference. Result has 108 places, 162 transitions, 1931 flow [2024-06-21 15:56:56,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1931, PETRI_PLACES=108, PETRI_TRANSITIONS=162} [2024-06-21 15:56:56,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-21 15:56:56,577 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 162 transitions, 1931 flow [2024-06-21 15:56:56,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:56,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:56,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:56,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 15:56:56,578 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:56,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:56,578 INFO L85 PathProgramCache]: Analyzing trace with hash 2105995705, now seen corresponding path program 6 times [2024-06-21 15:56:56,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:56,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057844906] [2024-06-21 15:56:56,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:56,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:56,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:56,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057844906] [2024-06-21 15:56:56,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057844906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:56,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:56,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:56,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099541066] [2024-06-21 15:56:56,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:56,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:56,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:56,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:56,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:56,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:56,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 162 transitions, 1931 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:56,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:56,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:56,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:56,924 INFO L124 PetriNetUnfolderBase]: 1148/1898 cut-off events. [2024-06-21 15:56:56,924 INFO L125 PetriNetUnfolderBase]: For 31706/31706 co-relation queries the response was YES. [2024-06-21 15:56:56,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10661 conditions, 1898 events. 1148/1898 cut-off events. For 31706/31706 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9869 event pairs, 335 based on Foata normal form. 3/1870 useless extension candidates. Maximal degree in co-relation 10611. Up to 1457 conditions per place. [2024-06-21 15:56:56,936 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 82 selfloop transitions, 96 changer transitions 0/186 dead transitions. [2024-06-21 15:56:56,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 186 transitions, 2369 flow [2024-06-21 15:56:56,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:56,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:56,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 15:56:56,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-21 15:56:56,937 INFO L175 Difference]: Start difference. First operand has 108 places, 162 transitions, 1931 flow. Second operand 7 states and 173 transitions. [2024-06-21 15:56:56,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 186 transitions, 2369 flow [2024-06-21 15:56:56,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 186 transitions, 2191 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 15:56:56,973 INFO L231 Difference]: Finished difference. Result has 112 places, 162 transitions, 1960 flow [2024-06-21 15:56:56,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1753, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1960, PETRI_PLACES=112, PETRI_TRANSITIONS=162} [2024-06-21 15:56:56,974 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-21 15:56:56,974 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 162 transitions, 1960 flow [2024-06-21 15:56:56,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:56,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:56,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:56,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 15:56:56,975 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:56,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:56,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1973643429, now seen corresponding path program 2 times [2024-06-21 15:56:56,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:56,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817501041] [2024-06-21 15:56:56,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:56,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:57,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:57,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817501041] [2024-06-21 15:56:57,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817501041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:57,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:57,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:57,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481957680] [2024-06-21 15:56:57,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:57,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:57,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:57,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:57,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:57,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:57,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 162 transitions, 1960 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:57,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:57,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:57,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:57,270 INFO L124 PetriNetUnfolderBase]: 1165/1947 cut-off events. [2024-06-21 15:56:57,270 INFO L125 PetriNetUnfolderBase]: For 35354/35360 co-relation queries the response was YES. [2024-06-21 15:56:57,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10930 conditions, 1947 events. 1165/1947 cut-off events. For 35354/35360 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10320 event pairs, 329 based on Foata normal form. 8/1945 useless extension candidates. Maximal degree in co-relation 10878. Up to 1626 conditions per place. [2024-06-21 15:56:57,282 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 140 selfloop transitions, 39 changer transitions 0/187 dead transitions. [2024-06-21 15:56:57,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 187 transitions, 2422 flow [2024-06-21 15:56:57,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:56:57,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:56:57,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 15:56:57,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-21 15:56:57,283 INFO L175 Difference]: Start difference. First operand has 112 places, 162 transitions, 1960 flow. Second operand 6 states and 149 transitions. [2024-06-21 15:56:57,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 187 transitions, 2422 flow [2024-06-21 15:56:57,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 187 transitions, 2200 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 15:56:57,321 INFO L231 Difference]: Finished difference. Result has 113 places, 164 transitions, 1852 flow [2024-06-21 15:56:57,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1738, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1852, PETRI_PLACES=113, PETRI_TRANSITIONS=164} [2024-06-21 15:56:57,322 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-21 15:56:57,323 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 164 transitions, 1852 flow [2024-06-21 15:56:57,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:57,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:57,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:57,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 15:56:57,323 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:57,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:57,324 INFO L85 PathProgramCache]: Analyzing trace with hash 275636605, now seen corresponding path program 3 times [2024-06-21 15:56:57,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:57,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141525799] [2024-06-21 15:56:57,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:57,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:57,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:57,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141525799] [2024-06-21 15:56:57,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141525799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:57,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:57,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:56:57,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313742655] [2024-06-21 15:56:57,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:57,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:56:57,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:57,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:56:57,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:56:57,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:57,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 164 transitions, 1852 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:57,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:57,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:57,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:57,631 INFO L124 PetriNetUnfolderBase]: 1157/1931 cut-off events. [2024-06-21 15:56:57,631 INFO L125 PetriNetUnfolderBase]: For 36558/36564 co-relation queries the response was YES. [2024-06-21 15:56:57,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10797 conditions, 1931 events. 1157/1931 cut-off events. For 36558/36564 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10259 event pairs, 298 based on Foata normal form. 8/1929 useless extension candidates. Maximal degree in co-relation 10744. Up to 1547 conditions per place. [2024-06-21 15:56:57,642 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 138 selfloop transitions, 44 changer transitions 0/190 dead transitions. [2024-06-21 15:56:57,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 190 transitions, 2324 flow [2024-06-21 15:56:57,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:56:57,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:56:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 15:56:57,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:56:57,645 INFO L175 Difference]: Start difference. First operand has 113 places, 164 transitions, 1852 flow. Second operand 6 states and 150 transitions. [2024-06-21 15:56:57,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 190 transitions, 2324 flow [2024-06-21 15:56:57,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 190 transitions, 2230 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 15:56:57,682 INFO L231 Difference]: Finished difference. Result has 115 places, 166 transitions, 1885 flow [2024-06-21 15:56:57,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1885, PETRI_PLACES=115, PETRI_TRANSITIONS=166} [2024-06-21 15:56:57,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-21 15:56:57,682 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 166 transitions, 1885 flow [2024-06-21 15:56:57,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:57,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:57,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:57,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 15:56:57,683 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)] === [2024-06-21 15:56:57,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:57,683 INFO L85 PathProgramCache]: Analyzing trace with hash 181145846, now seen corresponding path program 1 times [2024-06-21 15:56:57,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:57,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816470083] [2024-06-21 15:56:57,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:57,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:57,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:57,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816470083] [2024-06-21 15:56:57,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816470083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:57,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:57,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:56:57,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566999862] [2024-06-21 15:56:57,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:57,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:56:57,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:57,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:56:57,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:56:57,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:57,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 166 transitions, 1885 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:57,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:57,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:57,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:57,932 INFO L124 PetriNetUnfolderBase]: 1087/1857 cut-off events. [2024-06-21 15:56:57,932 INFO L125 PetriNetUnfolderBase]: For 38269/38280 co-relation queries the response was YES. [2024-06-21 15:56:57,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10686 conditions, 1857 events. 1087/1857 cut-off events. For 38269/38280 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10044 event pairs, 293 based on Foata normal form. 2/1851 useless extension candidates. Maximal degree in co-relation 10632. Up to 1554 conditions per place. [2024-06-21 15:56:57,945 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 152 selfloop transitions, 22 changer transitions 0/189 dead transitions. [2024-06-21 15:56:57,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 189 transitions, 2435 flow [2024-06-21 15:56:57,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:56:57,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:56:57,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-21 15:56:57,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-21 15:56:57,946 INFO L175 Difference]: Start difference. First operand has 115 places, 166 transitions, 1885 flow. Second operand 5 states and 129 transitions. [2024-06-21 15:56:57,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 189 transitions, 2435 flow [2024-06-21 15:56:57,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 189 transitions, 2326 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 15:56:57,990 INFO L231 Difference]: Finished difference. Result has 117 places, 175 transitions, 1924 flow [2024-06-21 15:56:57,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1924, PETRI_PLACES=117, PETRI_TRANSITIONS=175} [2024-06-21 15:56:57,991 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-21 15:56:57,991 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 175 transitions, 1924 flow [2024-06-21 15:56:57,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:57,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:57,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:57,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 15:56:57,993 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)] === [2024-06-21 15:56:57,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:57,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1115101976, now seen corresponding path program 2 times [2024-06-21 15:56:57,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:57,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119552904] [2024-06-21 15:56:57,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:57,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:58,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:58,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119552904] [2024-06-21 15:56:58,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119552904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:58,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:58,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:56:58,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056110395] [2024-06-21 15:56:58,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:58,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:56:58,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:58,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:56:58,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:56:58,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:56:58,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 175 transitions, 1924 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:58,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:58,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:56:58,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:58,327 INFO L124 PetriNetUnfolderBase]: 1094/1874 cut-off events. [2024-06-21 15:56:58,327 INFO L125 PetriNetUnfolderBase]: For 39790/39800 co-relation queries the response was YES. [2024-06-21 15:56:58,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10952 conditions, 1874 events. 1094/1874 cut-off events. For 39790/39800 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10219 event pairs, 289 based on Foata normal form. 2/1871 useless extension candidates. Maximal degree in co-relation 10896. Up to 1575 conditions per place. [2024-06-21 15:56:58,341 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 159 selfloop transitions, 20 changer transitions 0/194 dead transitions. [2024-06-21 15:56:58,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 194 transitions, 2407 flow [2024-06-21 15:56:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:56:58,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:56:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-21 15:56:58,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-21 15:56:58,343 INFO L175 Difference]: Start difference. First operand has 117 places, 175 transitions, 1924 flow. Second operand 5 states and 131 transitions. [2024-06-21 15:56:58,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 194 transitions, 2407 flow [2024-06-21 15:56:58,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 194 transitions, 2357 flow, removed 25 selfloop flow, removed 0 redundant places. [2024-06-21 15:56:58,392 INFO L231 Difference]: Finished difference. Result has 123 places, 178 transitions, 1970 flow [2024-06-21 15:56:58,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1880, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1970, PETRI_PLACES=123, PETRI_TRANSITIONS=178} [2024-06-21 15:56:58,393 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-21 15:56:58,393 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 178 transitions, 1970 flow [2024-06-21 15:56:58,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:58,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:58,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:58,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 15:56:58,394 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:58,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:58,394 INFO L85 PathProgramCache]: Analyzing trace with hash -687633201, now seen corresponding path program 1 times [2024-06-21 15:56:58,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:58,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454384451] [2024-06-21 15:56:58,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:58,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:58,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:58,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454384451] [2024-06-21 15:56:58,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454384451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:58,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:58,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:58,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384578945] [2024-06-21 15:56:58,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:58,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:58,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:58,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:58,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:58,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:58,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 178 transitions, 1970 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:58,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:58,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:58,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:58,844 INFO L124 PetriNetUnfolderBase]: 1380/2277 cut-off events. [2024-06-21 15:56:58,844 INFO L125 PetriNetUnfolderBase]: For 53676/53676 co-relation queries the response was YES. [2024-06-21 15:56:58,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13609 conditions, 2277 events. 1380/2277 cut-off events. For 53676/53676 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12347 event pairs, 230 based on Foata normal form. 6/2281 useless extension candidates. Maximal degree in co-relation 13549. Up to 1644 conditions per place. [2024-06-21 15:56:58,857 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 177 selfloop transitions, 43 changer transitions 0/228 dead transitions. [2024-06-21 15:56:58,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 228 transitions, 2740 flow [2024-06-21 15:56:58,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:56:58,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:56:58,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-21 15:56:58,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371951219512195 [2024-06-21 15:56:58,859 INFO L175 Difference]: Start difference. First operand has 123 places, 178 transitions, 1970 flow. Second operand 8 states and 209 transitions. [2024-06-21 15:56:58,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 228 transitions, 2740 flow [2024-06-21 15:56:58,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 228 transitions, 2708 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 15:56:58,917 INFO L231 Difference]: Finished difference. Result has 129 places, 185 transitions, 2137 flow [2024-06-21 15:56:58,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1938, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2137, PETRI_PLACES=129, PETRI_TRANSITIONS=185} [2024-06-21 15:56:58,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-21 15:56:58,918 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 185 transitions, 2137 flow [2024-06-21 15:56:58,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:58,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:58,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:58,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 15:56:58,919 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:58,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:58,919 INFO L85 PathProgramCache]: Analyzing trace with hash 47216027, now seen corresponding path program 2 times [2024-06-21 15:56:58,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:58,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785737713] [2024-06-21 15:56:58,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:58,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:59,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:59,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785737713] [2024-06-21 15:56:59,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785737713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:59,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:59,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:59,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868002616] [2024-06-21 15:56:59,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:59,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:59,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:59,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:59,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:59,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:59,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 185 transitions, 2137 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:59,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:59,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:59,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:59,335 INFO L124 PetriNetUnfolderBase]: 1367/2266 cut-off events. [2024-06-21 15:56:59,335 INFO L125 PetriNetUnfolderBase]: For 56307/56307 co-relation queries the response was YES. [2024-06-21 15:56:59,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13971 conditions, 2266 events. 1367/2266 cut-off events. For 56307/56307 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12339 event pairs, 311 based on Foata normal form. 6/2270 useless extension candidates. Maximal degree in co-relation 13909. Up to 1935 conditions per place. [2024-06-21 15:56:59,352 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 175 selfloop transitions, 42 changer transitions 0/225 dead transitions. [2024-06-21 15:56:59,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 225 transitions, 2747 flow [2024-06-21 15:56:59,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:56:59,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:56:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 15:56:59,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-21 15:56:59,353 INFO L175 Difference]: Start difference. First operand has 129 places, 185 transitions, 2137 flow. Second operand 8 states and 202 transitions. [2024-06-21 15:56:59,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 225 transitions, 2747 flow [2024-06-21 15:56:59,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 225 transitions, 2660 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 15:56:59,427 INFO L231 Difference]: Finished difference. Result has 133 places, 188 transitions, 2200 flow [2024-06-21 15:56:59,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2200, PETRI_PLACES=133, PETRI_TRANSITIONS=188} [2024-06-21 15:56:59,428 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-21 15:56:59,428 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 188 transitions, 2200 flow [2024-06-21 15:56:59,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:59,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:59,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:59,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 15:56:59,428 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:59,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:59,429 INFO L85 PathProgramCache]: Analyzing trace with hash 330942841, now seen corresponding path program 3 times [2024-06-21 15:56:59,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:59,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338889879] [2024-06-21 15:56:59,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:59,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:59,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:59,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338889879] [2024-06-21 15:56:59,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338889879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:59,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:59,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:56:59,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835548248] [2024-06-21 15:56:59,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:59,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:56:59,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:59,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:56:59,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:56:59,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:56:59,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 188 transitions, 2200 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:59,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:59,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:56:59,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:59,816 INFO L124 PetriNetUnfolderBase]: 1384/2288 cut-off events. [2024-06-21 15:56:59,817 INFO L125 PetriNetUnfolderBase]: For 61058/61074 co-relation queries the response was YES. [2024-06-21 15:56:59,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14363 conditions, 2288 events. 1384/2288 cut-off events. For 61058/61074 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12473 event pairs, 325 based on Foata normal form. 5/2287 useless extension candidates. Maximal degree in co-relation 14299. Up to 1808 conditions per place. [2024-06-21 15:56:59,834 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 115 selfloop transitions, 94 changer transitions 0/217 dead transitions. [2024-06-21 15:56:59,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 217 transitions, 2746 flow [2024-06-21 15:56:59,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:56:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:56:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 15:56:59,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-21 15:56:59,838 INFO L175 Difference]: Start difference. First operand has 133 places, 188 transitions, 2200 flow. Second operand 7 states and 177 transitions. [2024-06-21 15:56:59,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 217 transitions, 2746 flow [2024-06-21 15:56:59,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 217 transitions, 2634 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 15:56:59,947 INFO L231 Difference]: Finished difference. Result has 134 places, 190 transitions, 2330 flow [2024-06-21 15:56:59,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2088, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2330, PETRI_PLACES=134, PETRI_TRANSITIONS=190} [2024-06-21 15:56:59,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-21 15:56:59,948 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 190 transitions, 2330 flow [2024-06-21 15:56:59,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:59,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:59,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:59,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 15:56:59,949 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)] === [2024-06-21 15:56:59,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:59,949 INFO L85 PathProgramCache]: Analyzing trace with hash -971136043, now seen corresponding path program 1 times [2024-06-21 15:56:59,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:59,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779928252] [2024-06-21 15:56:59,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:59,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:59,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:00,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:00,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779928252] [2024-06-21 15:57:00,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779928252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:00,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:00,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:00,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405789892] [2024-06-21 15:57:00,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:00,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:00,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:00,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:00,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:00,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:57:00,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 190 transitions, 2330 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:00,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:00,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:57:00,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:00,338 INFO L124 PetriNetUnfolderBase]: 1324/2247 cut-off events. [2024-06-21 15:57:00,339 INFO L125 PetriNetUnfolderBase]: For 63714/63716 co-relation queries the response was YES. [2024-06-21 15:57:00,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14305 conditions, 2247 events. 1324/2247 cut-off events. For 63714/63716 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12529 event pairs, 308 based on Foata normal form. 2/2247 useless extension candidates. Maximal degree in co-relation 14240. Up to 1892 conditions per place. [2024-06-21 15:57:00,351 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 165 selfloop transitions, 30 changer transitions 0/218 dead transitions. [2024-06-21 15:57:00,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 218 transitions, 2911 flow [2024-06-21 15:57:00,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:00,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:00,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 15:57:00,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-21 15:57:00,353 INFO L175 Difference]: Start difference. First operand has 134 places, 190 transitions, 2330 flow. Second operand 6 states and 152 transitions. [2024-06-21 15:57:00,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 218 transitions, 2911 flow [2024-06-21 15:57:00,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 218 transitions, 2689 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:00,434 INFO L231 Difference]: Finished difference. Result has 136 places, 201 transitions, 2279 flow [2024-06-21 15:57:00,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2108, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2279, PETRI_PLACES=136, PETRI_TRANSITIONS=201} [2024-06-21 15:57:00,434 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-21 15:57:00,434 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 201 transitions, 2279 flow [2024-06-21 15:57:00,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:00,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:00,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:00,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 15:57:00,435 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:00,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:00,435 INFO L85 PathProgramCache]: Analyzing trace with hash -882676665, now seen corresponding path program 4 times [2024-06-21 15:57:00,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:00,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067495597] [2024-06-21 15:57:00,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:00,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:00,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:00,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067495597] [2024-06-21 15:57:00,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067495597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:00,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:00,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:00,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802014418] [2024-06-21 15:57:00,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:00,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:00,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:00,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:00,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:00,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:00,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 201 transitions, 2279 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:00,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:00,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:00,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:00,788 INFO L124 PetriNetUnfolderBase]: 1396/2294 cut-off events. [2024-06-21 15:57:00,788 INFO L125 PetriNetUnfolderBase]: For 66482/66482 co-relation queries the response was YES. [2024-06-21 15:57:00,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14559 conditions, 2294 events. 1396/2294 cut-off events. For 66482/66482 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12396 event pairs, 344 based on Foata normal form. 4/2261 useless extension candidates. Maximal degree in co-relation 14492. Up to 1824 conditions per place. [2024-06-21 15:57:00,803 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 122 selfloop transitions, 98 changer transitions 0/228 dead transitions. [2024-06-21 15:57:00,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 228 transitions, 2847 flow [2024-06-21 15:57:00,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:00,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:00,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 15:57:00,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-21 15:57:00,805 INFO L175 Difference]: Start difference. First operand has 136 places, 201 transitions, 2279 flow. Second operand 7 states and 173 transitions. [2024-06-21 15:57:00,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 228 transitions, 2847 flow [2024-06-21 15:57:00,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 228 transitions, 2817 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-21 15:57:00,909 INFO L231 Difference]: Finished difference. Result has 142 places, 203 transitions, 2503 flow [2024-06-21 15:57:00,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2249, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2503, PETRI_PLACES=142, PETRI_TRANSITIONS=203} [2024-06-21 15:57:00,909 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-21 15:57:00,909 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 203 transitions, 2503 flow [2024-06-21 15:57:00,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:00,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:00,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:00,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 15:57:00,910 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)] === [2024-06-21 15:57:00,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:00,910 INFO L85 PathProgramCache]: Analyzing trace with hash 574773985, now seen corresponding path program 2 times [2024-06-21 15:57:00,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:00,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720197456] [2024-06-21 15:57:00,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:00,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:00,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:00,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720197456] [2024-06-21 15:57:00,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720197456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:00,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:00,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:00,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964146543] [2024-06-21 15:57:00,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:00,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:00,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:00,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:00,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:01,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:57:01,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 203 transitions, 2503 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:01,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:01,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:57:01,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:01,257 INFO L124 PetriNetUnfolderBase]: 1326/2253 cut-off events. [2024-06-21 15:57:01,257 INFO L125 PetriNetUnfolderBase]: For 70339/70341 co-relation queries the response was YES. [2024-06-21 15:57:01,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14698 conditions, 2253 events. 1326/2253 cut-off events. For 70339/70341 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12628 event pairs, 305 based on Foata normal form. 2/2253 useless extension candidates. Maximal degree in co-relation 14629. Up to 1904 conditions per place. [2024-06-21 15:57:01,273 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 172 selfloop transitions, 25 changer transitions 0/220 dead transitions. [2024-06-21 15:57:01,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 220 transitions, 2969 flow [2024-06-21 15:57:01,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:57:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:57:01,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-06-21 15:57:01,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.676829268292683 [2024-06-21 15:57:01,274 INFO L175 Difference]: Start difference. First operand has 142 places, 203 transitions, 2503 flow. Second operand 4 states and 111 transitions. [2024-06-21 15:57:01,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 220 transitions, 2969 flow [2024-06-21 15:57:01,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 220 transitions, 2735 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:01,420 INFO L231 Difference]: Finished difference. Result has 141 places, 206 transitions, 2373 flow [2024-06-21 15:57:01,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2373, PETRI_PLACES=141, PETRI_TRANSITIONS=206} [2024-06-21 15:57:01,421 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-21 15:57:01,421 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 206 transitions, 2373 flow [2024-06-21 15:57:01,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:01,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:01,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:01,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 15:57:01,421 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)] === [2024-06-21 15:57:01,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:01,422 INFO L85 PathProgramCache]: Analyzing trace with hash 239489415, now seen corresponding path program 3 times [2024-06-21 15:57:01,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:01,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810733281] [2024-06-21 15:57:01,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:01,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:01,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:01,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810733281] [2024-06-21 15:57:01,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810733281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:01,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:01,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:01,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929015332] [2024-06-21 15:57:01,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:01,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:01,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:01,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:01,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:01,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:57:01,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 206 transitions, 2373 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:01,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:01,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:57:01,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:01,804 INFO L124 PetriNetUnfolderBase]: 1320/2245 cut-off events. [2024-06-21 15:57:01,805 INFO L125 PetriNetUnfolderBase]: For 71335/71337 co-relation queries the response was YES. [2024-06-21 15:57:01,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14389 conditions, 2245 events. 1320/2245 cut-off events. For 71335/71337 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12563 event pairs, 305 based on Foata normal form. 2/2245 useless extension candidates. Maximal degree in co-relation 14319. Up to 1885 conditions per place. [2024-06-21 15:57:01,820 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 167 selfloop transitions, 31 changer transitions 0/221 dead transitions. [2024-06-21 15:57:01,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 221 transitions, 2817 flow [2024-06-21 15:57:01,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:01,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-21 15:57:01,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-21 15:57:01,821 INFO L175 Difference]: Start difference. First operand has 141 places, 206 transitions, 2373 flow. Second operand 5 states and 131 transitions. [2024-06-21 15:57:01,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 221 transitions, 2817 flow [2024-06-21 15:57:01,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 221 transitions, 2775 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 15:57:01,927 INFO L231 Difference]: Finished difference. Result has 144 places, 206 transitions, 2405 flow [2024-06-21 15:57:01,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2331, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2405, PETRI_PLACES=144, PETRI_TRANSITIONS=206} [2024-06-21 15:57:01,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-21 15:57:01,928 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 206 transitions, 2405 flow [2024-06-21 15:57:01,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:01,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:01,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:01,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 15:57:01,928 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)] === [2024-06-21 15:57:01,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:01,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1251514325, now seen corresponding path program 1 times [2024-06-21 15:57:01,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:01,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009157726] [2024-06-21 15:57:01,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:01,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:01,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:01,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009157726] [2024-06-21 15:57:01,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009157726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:01,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:01,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:57:01,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132484626] [2024-06-21 15:57:01,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:01,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:57:01,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:01,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:57:01,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:57:02,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:57:02,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 206 transitions, 2405 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:02,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:02,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:57:02,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:02,238 INFO L124 PetriNetUnfolderBase]: 1294/2221 cut-off events. [2024-06-21 15:57:02,239 INFO L125 PetriNetUnfolderBase]: For 75921/75953 co-relation queries the response was YES. [2024-06-21 15:57:02,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14422 conditions, 2221 events. 1294/2221 cut-off events. For 75921/75953 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12623 event pairs, 303 based on Foata normal form. 16/2227 useless extension candidates. Maximal degree in co-relation 14351. Up to 1870 conditions per place. [2024-06-21 15:57:02,254 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 176 selfloop transitions, 25 changer transitions 0/222 dead transitions. [2024-06-21 15:57:02,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 222 transitions, 2938 flow [2024-06-21 15:57:02,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:02,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:02,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-21 15:57:02,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-06-21 15:57:02,255 INFO L175 Difference]: Start difference. First operand has 144 places, 206 transitions, 2405 flow. Second operand 5 states and 128 transitions. [2024-06-21 15:57:02,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 222 transitions, 2938 flow [2024-06-21 15:57:02,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 222 transitions, 2863 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:02,355 INFO L231 Difference]: Finished difference. Result has 145 places, 209 transitions, 2419 flow [2024-06-21 15:57:02,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2419, PETRI_PLACES=145, PETRI_TRANSITIONS=209} [2024-06-21 15:57:02,356 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-21 15:57:02,356 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 209 transitions, 2419 flow [2024-06-21 15:57:02,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:02,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:02,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:02,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 15:57:02,356 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)] === [2024-06-21 15:57:02,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:02,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1364866695, now seen corresponding path program 2 times [2024-06-21 15:57:02,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:02,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622864177] [2024-06-21 15:57:02,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:02,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:02,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:02,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622864177] [2024-06-21 15:57:02,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622864177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:02,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:02,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:02,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947437260] [2024-06-21 15:57:02,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:02,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:02,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:02,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:02,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:02,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:57:02,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 209 transitions, 2419 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:02,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:02,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:57:02,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:02,746 INFO L124 PetriNetUnfolderBase]: 1300/2220 cut-off events. [2024-06-21 15:57:02,746 INFO L125 PetriNetUnfolderBase]: For 75418/75433 co-relation queries the response was YES. [2024-06-21 15:57:02,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14349 conditions, 2220 events. 1300/2220 cut-off events. For 75418/75433 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12528 event pairs, 302 based on Foata normal form. 7/2218 useless extension candidates. Maximal degree in co-relation 14278. Up to 1875 conditions per place. [2024-06-21 15:57:02,764 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 174 selfloop transitions, 28 changer transitions 0/223 dead transitions. [2024-06-21 15:57:02,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 223 transitions, 2925 flow [2024-06-21 15:57:02,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:02,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:02,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 15:57:02,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-21 15:57:02,765 INFO L175 Difference]: Start difference. First operand has 145 places, 209 transitions, 2419 flow. Second operand 6 states and 148 transitions. [2024-06-21 15:57:02,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 223 transitions, 2925 flow [2024-06-21 15:57:02,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 223 transitions, 2853 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:02,871 INFO L231 Difference]: Finished difference. Result has 148 places, 209 transitions, 2409 flow [2024-06-21 15:57:02,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2347, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2409, PETRI_PLACES=148, PETRI_TRANSITIONS=209} [2024-06-21 15:57:02,872 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-21 15:57:02,872 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 209 transitions, 2409 flow [2024-06-21 15:57:02,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:02,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:02,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:02,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 15:57:02,873 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)] === [2024-06-21 15:57:02,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:02,873 INFO L85 PathProgramCache]: Analyzing trace with hash 208423943, now seen corresponding path program 3 times [2024-06-21 15:57:02,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:02,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852180204] [2024-06-21 15:57:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:02,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:02,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:02,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852180204] [2024-06-21 15:57:02,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852180204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:02,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:02,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:57:02,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266319686] [2024-06-21 15:57:02,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:02,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:57:02,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:02,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:57:02,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:57:02,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:57:02,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 209 transitions, 2409 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:02,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:02,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:57:02,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:03,222 INFO L124 PetriNetUnfolderBase]: 1294/2218 cut-off events. [2024-06-21 15:57:03,223 INFO L125 PetriNetUnfolderBase]: For 77560/77576 co-relation queries the response was YES. [2024-06-21 15:57:03,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14362 conditions, 2218 events. 1294/2218 cut-off events. For 77560/77576 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12526 event pairs, 295 based on Foata normal form. 3/2216 useless extension candidates. Maximal degree in co-relation 14291. Up to 1879 conditions per place. [2024-06-21 15:57:03,238 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 183 selfloop transitions, 20 changer transitions 0/224 dead transitions. [2024-06-21 15:57:03,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 224 transitions, 2861 flow [2024-06-21 15:57:03,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:03,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:03,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-21 15:57:03,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 15:57:03,239 INFO L175 Difference]: Start difference. First operand has 148 places, 209 transitions, 2409 flow. Second operand 5 states and 130 transitions. [2024-06-21 15:57:03,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 224 transitions, 2861 flow [2024-06-21 15:57:03,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 224 transitions, 2767 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:03,352 INFO L231 Difference]: Finished difference. Result has 147 places, 209 transitions, 2365 flow [2024-06-21 15:57:03,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2315, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2365, PETRI_PLACES=147, PETRI_TRANSITIONS=209} [2024-06-21 15:57:03,353 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-21 15:57:03,353 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 209 transitions, 2365 flow [2024-06-21 15:57:03,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:03,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:03,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:03,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 15:57:03,354 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)] === [2024-06-21 15:57:03,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:03,354 INFO L85 PathProgramCache]: Analyzing trace with hash 208670207, now seen corresponding path program 1 times [2024-06-21 15:57:03,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:03,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034278854] [2024-06-21 15:57:03,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:03,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:03,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:03,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034278854] [2024-06-21 15:57:03,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034278854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:03,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:03,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:03,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043277385] [2024-06-21 15:57:03,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:03,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:03,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:03,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:03,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:03,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:57:03,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 209 transitions, 2365 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:03,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:03,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:57:03,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:03,697 INFO L124 PetriNetUnfolderBase]: 1305/2231 cut-off events. [2024-06-21 15:57:03,697 INFO L125 PetriNetUnfolderBase]: For 79710/79720 co-relation queries the response was YES. [2024-06-21 15:57:03,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14376 conditions, 2231 events. 1305/2231 cut-off events. For 79710/79720 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12514 event pairs, 318 based on Foata normal form. 2/2228 useless extension candidates. Maximal degree in co-relation 14305. Up to 1925 conditions per place. [2024-06-21 15:57:03,712 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 187 selfloop transitions, 10 changer transitions 0/220 dead transitions. [2024-06-21 15:57:03,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 220 transitions, 2805 flow [2024-06-21 15:57:03,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:57:03,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:57:03,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-21 15:57:03,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-21 15:57:03,714 INFO L175 Difference]: Start difference. First operand has 147 places, 209 transitions, 2365 flow. Second operand 4 states and 103 transitions. [2024-06-21 15:57:03,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 220 transitions, 2805 flow [2024-06-21 15:57:03,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 220 transitions, 2765 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:03,845 INFO L231 Difference]: Finished difference. Result has 147 places, 211 transitions, 2374 flow [2024-06-21 15:57:03,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2325, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2374, PETRI_PLACES=147, PETRI_TRANSITIONS=211} [2024-06-21 15:57:03,845 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-21 15:57:03,846 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 211 transitions, 2374 flow [2024-06-21 15:57:03,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:03,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:03,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:03,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 15:57:03,846 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:03,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:03,847 INFO L85 PathProgramCache]: Analyzing trace with hash 628897646, now seen corresponding path program 1 times [2024-06-21 15:57:03,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:03,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749531403] [2024-06-21 15:57:03,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:03,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:03,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:03,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749531403] [2024-06-21 15:57:03,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749531403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:03,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:03,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:03,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077198354] [2024-06-21 15:57:03,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:03,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:03,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:03,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:03,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:03,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:03,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 211 transitions, 2374 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:03,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:03,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:03,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:04,301 INFO L124 PetriNetUnfolderBase]: 1454/2415 cut-off events. [2024-06-21 15:57:04,301 INFO L125 PetriNetUnfolderBase]: For 93306/93306 co-relation queries the response was YES. [2024-06-21 15:57:04,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15528 conditions, 2415 events. 1454/2415 cut-off events. For 93306/93306 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13295 event pairs, 219 based on Foata normal form. 18/2431 useless extension candidates. Maximal degree in co-relation 15456. Up to 1696 conditions per place. [2024-06-21 15:57:04,319 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 197 selfloop transitions, 52 changer transitions 0/257 dead transitions. [2024-06-21 15:57:04,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 257 transitions, 3184 flow [2024-06-21 15:57:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:04,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-21 15:57:04,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-21 15:57:04,320 INFO L175 Difference]: Start difference. First operand has 147 places, 211 transitions, 2374 flow. Second operand 8 states and 210 transitions. [2024-06-21 15:57:04,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 257 transitions, 3184 flow [2024-06-21 15:57:04,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 257 transitions, 3151 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-21 15:57:04,440 INFO L231 Difference]: Finished difference. Result has 153 places, 213 transitions, 2485 flow [2024-06-21 15:57:04,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2341, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2485, PETRI_PLACES=153, PETRI_TRANSITIONS=213} [2024-06-21 15:57:04,440 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-21 15:57:04,440 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 213 transitions, 2485 flow [2024-06-21 15:57:04,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:04,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:04,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:04,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 15:57:04,441 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:04,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:04,441 INFO L85 PathProgramCache]: Analyzing trace with hash 630775316, now seen corresponding path program 2 times [2024-06-21 15:57:04,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:04,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750455730] [2024-06-21 15:57:04,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:04,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:04,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:04,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750455730] [2024-06-21 15:57:04,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750455730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:04,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:04,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:04,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540206460] [2024-06-21 15:57:04,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:04,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:04,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:04,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:04,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:04,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:04,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 213 transitions, 2485 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:04,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:04,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:04,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:04,904 INFO L124 PetriNetUnfolderBase]: 1408/2353 cut-off events. [2024-06-21 15:57:04,904 INFO L125 PetriNetUnfolderBase]: For 87896/87896 co-relation queries the response was YES. [2024-06-21 15:57:04,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14797 conditions, 2353 events. 1408/2353 cut-off events. For 87896/87896 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12923 event pairs, 283 based on Foata normal form. 24/2375 useless extension candidates. Maximal degree in co-relation 14724. Up to 1891 conditions per place. [2024-06-21 15:57:04,921 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 200 selfloop transitions, 46 changer transitions 0/254 dead transitions. [2024-06-21 15:57:04,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 254 transitions, 3148 flow [2024-06-21 15:57:04,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:04,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:04,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 15:57:04,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 15:57:04,923 INFO L175 Difference]: Start difference. First operand has 153 places, 213 transitions, 2485 flow. Second operand 8 states and 204 transitions. [2024-06-21 15:57:04,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 254 transitions, 3148 flow [2024-06-21 15:57:05,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 254 transitions, 3031 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:05,075 INFO L231 Difference]: Finished difference. Result has 156 places, 214 transitions, 2499 flow [2024-06-21 15:57:05,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2499, PETRI_PLACES=156, PETRI_TRANSITIONS=214} [2024-06-21 15:57:05,075 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-21 15:57:05,075 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 214 transitions, 2499 flow [2024-06-21 15:57:05,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:05,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:05,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:05,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 15:57:05,076 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:05,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:05,077 INFO L85 PathProgramCache]: Analyzing trace with hash 2094764292, now seen corresponding path program 3 times [2024-06-21 15:57:05,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:05,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168168750] [2024-06-21 15:57:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:05,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:05,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:05,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:05,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168168750] [2024-06-21 15:57:05,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168168750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:05,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:05,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:05,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87518493] [2024-06-21 15:57:05,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:05,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:05,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:05,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:05,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:05,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:05,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 214 transitions, 2499 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:05,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:05,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:05,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:05,592 INFO L124 PetriNetUnfolderBase]: 1466/2457 cut-off events. [2024-06-21 15:57:05,592 INFO L125 PetriNetUnfolderBase]: For 89006/89020 co-relation queries the response was YES. [2024-06-21 15:57:05,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15238 conditions, 2457 events. 1466/2457 cut-off events. For 89006/89020 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13752 event pairs, 314 based on Foata normal form. 17/2468 useless extension candidates. Maximal degree in co-relation 15164. Up to 1869 conditions per place. [2024-06-21 15:57:05,610 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 148 selfloop transitions, 93 changer transitions 0/249 dead transitions. [2024-06-21 15:57:05,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 249 transitions, 3129 flow [2024-06-21 15:57:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:05,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:05,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 15:57:05,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-21 15:57:05,611 INFO L175 Difference]: Start difference. First operand has 156 places, 214 transitions, 2499 flow. Second operand 8 states and 201 transitions. [2024-06-21 15:57:05,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 249 transitions, 3129 flow [2024-06-21 15:57:05,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 249 transitions, 3041 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:05,761 INFO L231 Difference]: Finished difference. Result has 158 places, 215 transitions, 2636 flow [2024-06-21 15:57:05,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2411, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2636, PETRI_PLACES=158, PETRI_TRANSITIONS=215} [2024-06-21 15:57:05,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-21 15:57:05,762 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 215 transitions, 2636 flow [2024-06-21 15:57:05,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:05,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:05,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:05,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 15:57:05,762 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:05,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:05,763 INFO L85 PathProgramCache]: Analyzing trace with hash -3477620, now seen corresponding path program 4 times [2024-06-21 15:57:05,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:05,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633426247] [2024-06-21 15:57:05,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:05,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:05,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:05,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:05,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633426247] [2024-06-21 15:57:05,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633426247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:05,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:05,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:05,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462749348] [2024-06-21 15:57:05,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:05,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:05,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:05,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:05,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:05,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:05,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 215 transitions, 2636 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:05,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:05,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:05,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:06,271 INFO L124 PetriNetUnfolderBase]: 1507/2528 cut-off events. [2024-06-21 15:57:06,271 INFO L125 PetriNetUnfolderBase]: For 93069/93083 co-relation queries the response was YES. [2024-06-21 15:57:06,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15870 conditions, 2528 events. 1507/2528 cut-off events. For 93069/93083 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14298 event pairs, 309 based on Foata normal form. 13/2535 useless extension candidates. Maximal degree in co-relation 15795. Up to 1850 conditions per place. [2024-06-21 15:57:06,289 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 153 selfloop transitions, 96 changer transitions 0/257 dead transitions. [2024-06-21 15:57:06,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 257 transitions, 3310 flow [2024-06-21 15:57:06,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:57:06,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:57:06,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-21 15:57:06,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:57:06,291 INFO L175 Difference]: Start difference. First operand has 158 places, 215 transitions, 2636 flow. Second operand 9 states and 225 transitions. [2024-06-21 15:57:06,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 257 transitions, 3310 flow [2024-06-21 15:57:06,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 257 transitions, 3111 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:06,486 INFO L231 Difference]: Finished difference. Result has 161 places, 216 transitions, 2665 flow [2024-06-21 15:57:06,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2437, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2665, PETRI_PLACES=161, PETRI_TRANSITIONS=216} [2024-06-21 15:57:06,488 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-21 15:57:06,488 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 216 transitions, 2665 flow [2024-06-21 15:57:06,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:06,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:06,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:06,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 15:57:06,491 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:06,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:06,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1035817898, now seen corresponding path program 5 times [2024-06-21 15:57:06,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:06,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699186423] [2024-06-21 15:57:06,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:06,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:06,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:06,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:06,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699186423] [2024-06-21 15:57:06,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699186423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:06,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:06,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:06,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079874045] [2024-06-21 15:57:06,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:06,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:06,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:06,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:06,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:06,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:06,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 216 transitions, 2665 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:06,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:06,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:06,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:06,917 INFO L124 PetriNetUnfolderBase]: 1565/2642 cut-off events. [2024-06-21 15:57:06,917 INFO L125 PetriNetUnfolderBase]: For 100605/100613 co-relation queries the response was YES. [2024-06-21 15:57:06,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16437 conditions, 2642 events. 1565/2642 cut-off events. For 100605/100613 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15224 event pairs, 336 based on Foata normal form. 17/2655 useless extension candidates. Maximal degree in co-relation 16361. Up to 2034 conditions per place. [2024-06-21 15:57:06,936 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 145 selfloop transitions, 95 changer transitions 0/248 dead transitions. [2024-06-21 15:57:06,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 248 transitions, 3287 flow [2024-06-21 15:57:06,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:06,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:06,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 15:57:06,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-21 15:57:06,942 INFO L175 Difference]: Start difference. First operand has 161 places, 216 transitions, 2665 flow. Second operand 7 states and 179 transitions. [2024-06-21 15:57:06,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 248 transitions, 3287 flow [2024-06-21 15:57:07,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 248 transitions, 3073 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 15:57:07,107 INFO L231 Difference]: Finished difference. Result has 161 places, 217 transitions, 2684 flow [2024-06-21 15:57:07,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2451, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2684, PETRI_PLACES=161, PETRI_TRANSITIONS=217} [2024-06-21 15:57:07,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-21 15:57:07,108 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 217 transitions, 2684 flow [2024-06-21 15:57:07,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:07,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:07,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:07,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 15:57:07,109 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:07,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:07,109 INFO L85 PathProgramCache]: Analyzing trace with hash 572752768, now seen corresponding path program 1 times [2024-06-21 15:57:07,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:07,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741228973] [2024-06-21 15:57:07,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:07,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:07,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:07,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:07,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741228973] [2024-06-21 15:57:07,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741228973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:07,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:07,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:07,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041672857] [2024-06-21 15:57:07,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:07,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:07,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:07,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:07,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:07,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:07,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 217 transitions, 2684 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:07,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:07,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:07,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:07,580 INFO L124 PetriNetUnfolderBase]: 1692/2865 cut-off events. [2024-06-21 15:57:07,580 INFO L125 PetriNetUnfolderBase]: For 115521/115529 co-relation queries the response was YES. [2024-06-21 15:57:07,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18149 conditions, 2865 events. 1692/2865 cut-off events. For 115521/115529 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 16967 event pairs, 358 based on Foata normal form. 13/2874 useless extension candidates. Maximal degree in co-relation 18072. Up to 1800 conditions per place. [2024-06-21 15:57:07,601 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 147 selfloop transitions, 99 changer transitions 0/254 dead transitions. [2024-06-21 15:57:07,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 254 transitions, 3504 flow [2024-06-21 15:57:07,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:07,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:07,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 15:57:07,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-21 15:57:07,602 INFO L175 Difference]: Start difference. First operand has 161 places, 217 transitions, 2684 flow. Second operand 7 states and 183 transitions. [2024-06-21 15:57:07,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 254 transitions, 3504 flow [2024-06-21 15:57:07,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 254 transitions, 3297 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:07,777 INFO L231 Difference]: Finished difference. Result has 163 places, 219 transitions, 2747 flow [2024-06-21 15:57:07,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2477, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2747, PETRI_PLACES=163, PETRI_TRANSITIONS=219} [2024-06-21 15:57:07,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-21 15:57:07,778 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 219 transitions, 2747 flow [2024-06-21 15:57:07,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:07,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:07,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:07,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 15:57:07,778 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)] === [2024-06-21 15:57:07,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:07,779 INFO L85 PathProgramCache]: Analyzing trace with hash 784133375, now seen corresponding path program 1 times [2024-06-21 15:57:07,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:07,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609950760] [2024-06-21 15:57:07,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:07,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:07,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:07,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609950760] [2024-06-21 15:57:07,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609950760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:07,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:07,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:07,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390117741] [2024-06-21 15:57:07,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:07,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:07,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:07,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:07,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:07,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:07,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 219 transitions, 2747 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:07,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:07,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:07,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:08,184 INFO L124 PetriNetUnfolderBase]: 1705/2890 cut-off events. [2024-06-21 15:57:08,184 INFO L125 PetriNetUnfolderBase]: For 113605/113613 co-relation queries the response was YES. [2024-06-21 15:57:08,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18385 conditions, 2890 events. 1705/2890 cut-off events. For 113605/113613 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17134 event pairs, 388 based on Foata normal form. 2/2887 useless extension candidates. Maximal degree in co-relation 18307. Up to 2463 conditions per place. [2024-06-21 15:57:08,206 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 205 selfloop transitions, 50 changer transitions 0/263 dead transitions. [2024-06-21 15:57:08,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 263 transitions, 3711 flow [2024-06-21 15:57:08,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:08,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 15:57:08,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-21 15:57:08,207 INFO L175 Difference]: Start difference. First operand has 163 places, 219 transitions, 2747 flow. Second operand 6 states and 154 transitions. [2024-06-21 15:57:08,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 263 transitions, 3711 flow [2024-06-21 15:57:08,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 263 transitions, 3574 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:08,412 INFO L231 Difference]: Finished difference. Result has 169 places, 237 transitions, 2984 flow [2024-06-21 15:57:08,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2610, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2984, PETRI_PLACES=169, PETRI_TRANSITIONS=237} [2024-06-21 15:57:08,413 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-21 15:57:08,413 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 237 transitions, 2984 flow [2024-06-21 15:57:08,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:08,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:08,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:08,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 15:57:08,414 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)] === [2024-06-21 15:57:08,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:08,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1611876245, now seen corresponding path program 2 times [2024-06-21 15:57:08,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:08,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820305623] [2024-06-21 15:57:08,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:08,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:08,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:08,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820305623] [2024-06-21 15:57:08,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820305623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:08,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:08,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:08,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496278719] [2024-06-21 15:57:08,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:08,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:08,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:08,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:08,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:08,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:08,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 237 transitions, 2984 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:08,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:08,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:08,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:08,936 INFO L124 PetriNetUnfolderBase]: 1728/2943 cut-off events. [2024-06-21 15:57:08,937 INFO L125 PetriNetUnfolderBase]: For 118047/118049 co-relation queries the response was YES. [2024-06-21 15:57:08,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19254 conditions, 2943 events. 1728/2943 cut-off events. For 118047/118049 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17575 event pairs, 370 based on Foata normal form. 1/2942 useless extension candidates. Maximal degree in co-relation 19171. Up to 2594 conditions per place. [2024-06-21 15:57:08,960 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 224 selfloop transitions, 36 changer transitions 0/268 dead transitions. [2024-06-21 15:57:08,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 268 transitions, 3803 flow [2024-06-21 15:57:08,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:08,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:08,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 15:57:08,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 15:57:08,961 INFO L175 Difference]: Start difference. First operand has 169 places, 237 transitions, 2984 flow. Second operand 7 states and 168 transitions. [2024-06-21 15:57:08,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 268 transitions, 3803 flow [2024-06-21 15:57:09,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 268 transitions, 3733 flow, removed 35 selfloop flow, removed 0 redundant places. [2024-06-21 15:57:09,113 INFO L231 Difference]: Finished difference. Result has 177 places, 249 transitions, 3181 flow [2024-06-21 15:57:09,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2926, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3181, PETRI_PLACES=177, PETRI_TRANSITIONS=249} [2024-06-21 15:57:09,114 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-21 15:57:09,114 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 249 transitions, 3181 flow [2024-06-21 15:57:09,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:09,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:09,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:09,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 15:57:09,115 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:09,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:09,115 INFO L85 PathProgramCache]: Analyzing trace with hash -705904862, now seen corresponding path program 6 times [2024-06-21 15:57:09,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:09,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274607772] [2024-06-21 15:57:09,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:09,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:09,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:09,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274607772] [2024-06-21 15:57:09,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274607772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:09,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:09,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:09,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995331572] [2024-06-21 15:57:09,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:09,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:09,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:09,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:09,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:09,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:09,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 249 transitions, 3181 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:09,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:09,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:09,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:09,642 INFO L124 PetriNetUnfolderBase]: 1700/2881 cut-off events. [2024-06-21 15:57:09,642 INFO L125 PetriNetUnfolderBase]: For 121739/121739 co-relation queries the response was YES. [2024-06-21 15:57:09,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18418 conditions, 2881 events. 1700/2881 cut-off events. For 121739/121739 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17014 event pairs, 390 based on Foata normal form. 16/2866 useless extension candidates. Maximal degree in co-relation 18331. Up to 2257 conditions per place. [2024-06-21 15:57:09,665 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 176 selfloop transitions, 97 changer transitions 0/281 dead transitions. [2024-06-21 15:57:09,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 281 transitions, 3845 flow [2024-06-21 15:57:09,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:09,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:09,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 15:57:09,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-21 15:57:09,667 INFO L175 Difference]: Start difference. First operand has 177 places, 249 transitions, 3181 flow. Second operand 8 states and 197 transitions. [2024-06-21 15:57:09,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 281 transitions, 3845 flow [2024-06-21 15:57:09,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 281 transitions, 3739 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:09,848 INFO L231 Difference]: Finished difference. Result has 182 places, 249 transitions, 3280 flow [2024-06-21 15:57:09,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3075, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3280, PETRI_PLACES=182, PETRI_TRANSITIONS=249} [2024-06-21 15:57:09,849 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-21 15:57:09,849 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 249 transitions, 3280 flow [2024-06-21 15:57:09,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:09,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:09,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:09,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 15:57:09,850 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:09,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:09,850 INFO L85 PathProgramCache]: Analyzing trace with hash -705908582, now seen corresponding path program 7 times [2024-06-21 15:57:09,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:09,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744092584] [2024-06-21 15:57:09,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:09,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:09,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:09,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:09,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744092584] [2024-06-21 15:57:09,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744092584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:09,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:09,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:09,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824289554] [2024-06-21 15:57:09,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:09,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:09,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:09,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:09,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:09,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:09,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 249 transitions, 3280 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:09,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:09,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:09,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:10,403 INFO L124 PetriNetUnfolderBase]: 1741/2952 cut-off events. [2024-06-21 15:57:10,404 INFO L125 PetriNetUnfolderBase]: For 126004/126004 co-relation queries the response was YES. [2024-06-21 15:57:10,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19020 conditions, 2952 events. 1741/2952 cut-off events. For 126004/126004 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17609 event pairs, 385 based on Foata normal form. 12/2933 useless extension candidates. Maximal degree in co-relation 18932. Up to 2238 conditions per place. [2024-06-21 15:57:10,428 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 181 selfloop transitions, 100 changer transitions 0/289 dead transitions. [2024-06-21 15:57:10,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 289 transitions, 4020 flow [2024-06-21 15:57:10,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:57:10,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:57:10,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-21 15:57:10,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-21 15:57:10,435 INFO L175 Difference]: Start difference. First operand has 182 places, 249 transitions, 3280 flow. Second operand 9 states and 221 transitions. [2024-06-21 15:57:10,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 289 transitions, 4020 flow [2024-06-21 15:57:10,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 289 transitions, 3890 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:10,617 INFO L231 Difference]: Finished difference. Result has 186 places, 250 transitions, 3392 flow [2024-06-21 15:57:10,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3150, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3392, PETRI_PLACES=186, PETRI_TRANSITIONS=250} [2024-06-21 15:57:10,618 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-21 15:57:10,618 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 250 transitions, 3392 flow [2024-06-21 15:57:10,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:10,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:10,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:10,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 15:57:10,619 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:10,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:10,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1711816828, now seen corresponding path program 8 times [2024-06-21 15:57:10,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:10,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979309516] [2024-06-21 15:57:10,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:10,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:10,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:10,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979309516] [2024-06-21 15:57:10,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979309516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:10,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:10,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:10,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989160252] [2024-06-21 15:57:10,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:10,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:10,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:10,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:10,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:10,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:10,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 250 transitions, 3392 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:10,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:10,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:10,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:11,177 INFO L124 PetriNetUnfolderBase]: 1774/3024 cut-off events. [2024-06-21 15:57:11,177 INFO L125 PetriNetUnfolderBase]: For 135147/135153 co-relation queries the response was YES. [2024-06-21 15:57:11,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19374 conditions, 3024 events. 1774/3024 cut-off events. For 135147/135153 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18256 event pairs, 404 based on Foata normal form. 20/3025 useless extension candidates. Maximal degree in co-relation 19284. Up to 2393 conditions per place. [2024-06-21 15:57:11,201 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 177 selfloop transitions, 94 changer transitions 0/279 dead transitions. [2024-06-21 15:57:11,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 279 transitions, 4074 flow [2024-06-21 15:57:11,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:11,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:11,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 15:57:11,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:57:11,217 INFO L175 Difference]: Start difference. First operand has 186 places, 250 transitions, 3392 flow. Second operand 7 states and 175 transitions. [2024-06-21 15:57:11,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 279 transitions, 4074 flow [2024-06-21 15:57:11,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 279 transitions, 3846 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 15:57:11,441 INFO L231 Difference]: Finished difference. Result has 186 places, 251 transitions, 3399 flow [2024-06-21 15:57:11,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3164, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3399, PETRI_PLACES=186, PETRI_TRANSITIONS=251} [2024-06-21 15:57:11,442 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-21 15:57:11,442 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 251 transitions, 3399 flow [2024-06-21 15:57:11,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:11,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:11,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:11,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 15:57:11,442 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:11,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:11,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1246932014, now seen corresponding path program 2 times [2024-06-21 15:57:11,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:11,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715890703] [2024-06-21 15:57:11,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:11,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:11,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:11,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715890703] [2024-06-21 15:57:11,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715890703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:11,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:11,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:11,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177789111] [2024-06-21 15:57:11,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:11,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:11,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:11,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:11,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:11,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:11,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 251 transitions, 3399 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:11,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:11,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:11,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:12,011 INFO L124 PetriNetUnfolderBase]: 1815/3100 cut-off events. [2024-06-21 15:57:12,012 INFO L125 PetriNetUnfolderBase]: For 137543/137549 co-relation queries the response was YES. [2024-06-21 15:57:12,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19709 conditions, 3100 events. 1815/3100 cut-off events. For 137543/137549 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18865 event pairs, 404 based on Foata normal form. 16/3097 useless extension candidates. Maximal degree in co-relation 19618. Up to 2374 conditions per place. [2024-06-21 15:57:12,038 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 180 selfloop transitions, 95 changer transitions 0/283 dead transitions. [2024-06-21 15:57:12,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 283 transitions, 4103 flow [2024-06-21 15:57:12,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:12,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:12,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 15:57:12,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 15:57:12,039 INFO L175 Difference]: Start difference. First operand has 186 places, 251 transitions, 3399 flow. Second operand 7 states and 178 transitions. [2024-06-21 15:57:12,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 283 transitions, 4103 flow [2024-06-21 15:57:12,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 283 transitions, 3890 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:12,269 INFO L231 Difference]: Finished difference. Result has 188 places, 252 transitions, 3422 flow [2024-06-21 15:57:12,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3186, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3422, PETRI_PLACES=188, PETRI_TRANSITIONS=252} [2024-06-21 15:57:12,269 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-21 15:57:12,270 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 252 transitions, 3422 flow [2024-06-21 15:57:12,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:12,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:12,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:12,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 15:57:12,270 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:12,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:12,271 INFO L85 PathProgramCache]: Analyzing trace with hash -685071406, now seen corresponding path program 3 times [2024-06-21 15:57:12,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:12,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141442272] [2024-06-21 15:57:12,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:12,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:12,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:12,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141442272] [2024-06-21 15:57:12,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141442272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:12,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:12,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:12,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423133626] [2024-06-21 15:57:12,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:12,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:12,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:12,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:12,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:12,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:12,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 252 transitions, 3422 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:12,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:12,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:12,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:12,787 INFO L124 PetriNetUnfolderBase]: 1795/3078 cut-off events. [2024-06-21 15:57:12,787 INFO L125 PetriNetUnfolderBase]: For 129987/129993 co-relation queries the response was YES. [2024-06-21 15:57:12,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18958 conditions, 3078 events. 1795/3078 cut-off events. For 129987/129993 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18781 event pairs, 349 based on Foata normal form. 16/3075 useless extension candidates. Maximal degree in co-relation 18866. Up to 1713 conditions per place. [2024-06-21 15:57:12,813 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 171 selfloop transitions, 104 changer transitions 0/283 dead transitions. [2024-06-21 15:57:12,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 283 transitions, 4014 flow [2024-06-21 15:57:12,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:12,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 15:57:12,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-21 15:57:12,814 INFO L175 Difference]: Start difference. First operand has 188 places, 252 transitions, 3422 flow. Second operand 7 states and 177 transitions. [2024-06-21 15:57:12,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 283 transitions, 4014 flow [2024-06-21 15:57:13,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 283 transitions, 3786 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:13,133 INFO L231 Difference]: Finished difference. Result has 188 places, 251 transitions, 3332 flow [2024-06-21 15:57:13,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3120, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3332, PETRI_PLACES=188, PETRI_TRANSITIONS=251} [2024-06-21 15:57:13,134 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-21 15:57:13,134 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 251 transitions, 3332 flow [2024-06-21 15:57:13,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:13,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:13,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:13,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 15:57:13,134 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)] === [2024-06-21 15:57:13,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:13,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1021601257, now seen corresponding path program 3 times [2024-06-21 15:57:13,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:13,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863374835] [2024-06-21 15:57:13,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:13,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:13,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:13,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863374835] [2024-06-21 15:57:13,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863374835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:13,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:13,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:13,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397009958] [2024-06-21 15:57:13,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:13,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:13,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:13,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:13,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:13,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:13,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 251 transitions, 3332 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:13,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:13,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:13,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:13,582 INFO L124 PetriNetUnfolderBase]: 1800/3056 cut-off events. [2024-06-21 15:57:13,583 INFO L125 PetriNetUnfolderBase]: For 118215/118215 co-relation queries the response was YES. [2024-06-21 15:57:13,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18908 conditions, 3056 events. 1800/3056 cut-off events. For 118215/118215 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18482 event pairs, 400 based on Foata normal form. 1/3041 useless extension candidates. Maximal degree in co-relation 18816. Up to 2619 conditions per place. [2024-06-21 15:57:13,606 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 210 selfloop transitions, 64 changer transitions 0/282 dead transitions. [2024-06-21 15:57:13,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 282 transitions, 4371 flow [2024-06-21 15:57:13,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:13,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 15:57:13,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:57:13,608 INFO L175 Difference]: Start difference. First operand has 188 places, 251 transitions, 3332 flow. Second operand 6 states and 150 transitions. [2024-06-21 15:57:13,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 282 transitions, 4371 flow [2024-06-21 15:57:13,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 282 transitions, 4071 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:13,844 INFO L231 Difference]: Finished difference. Result has 189 places, 260 transitions, 3339 flow [2024-06-21 15:57:13,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3032, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3339, PETRI_PLACES=189, PETRI_TRANSITIONS=260} [2024-06-21 15:57:13,845 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-21 15:57:13,845 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 260 transitions, 3339 flow [2024-06-21 15:57:13,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:13,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:13,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:13,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 15:57:13,845 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)] === [2024-06-21 15:57:13,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:13,846 INFO L85 PathProgramCache]: Analyzing trace with hash -565135467, now seen corresponding path program 4 times [2024-06-21 15:57:13,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:13,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568087875] [2024-06-21 15:57:13,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:13,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:13,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:13,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568087875] [2024-06-21 15:57:13,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568087875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:13,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:13,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:13,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527090465] [2024-06-21 15:57:13,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:13,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:13,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:13,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:13,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:13,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:13,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 260 transitions, 3339 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:13,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:13,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:13,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:14,339 INFO L124 PetriNetUnfolderBase]: 1805/3067 cut-off events. [2024-06-21 15:57:14,339 INFO L125 PetriNetUnfolderBase]: For 119630/119630 co-relation queries the response was YES. [2024-06-21 15:57:14,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18541 conditions, 3067 events. 1805/3067 cut-off events. For 119630/119630 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18575 event pairs, 400 based on Foata normal form. 1/3052 useless extension candidates. Maximal degree in co-relation 18448. Up to 2623 conditions per place. [2024-06-21 15:57:14,359 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 205 selfloop transitions, 69 changer transitions 0/282 dead transitions. [2024-06-21 15:57:14,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 282 transitions, 4211 flow [2024-06-21 15:57:14,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:14,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:14,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 15:57:14,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-21 15:57:14,360 INFO L175 Difference]: Start difference. First operand has 189 places, 260 transitions, 3339 flow. Second operand 6 states and 146 transitions. [2024-06-21 15:57:14,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 282 transitions, 4211 flow [2024-06-21 15:57:14,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 282 transitions, 4110 flow, removed 43 selfloop flow, removed 1 redundant places. [2024-06-21 15:57:14,601 INFO L231 Difference]: Finished difference. Result has 194 places, 264 transitions, 3458 flow [2024-06-21 15:57:14,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3256, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3458, PETRI_PLACES=194, PETRI_TRANSITIONS=264} [2024-06-21 15:57:14,602 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-21 15:57:14,602 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 264 transitions, 3458 flow [2024-06-21 15:57:14,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:14,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:14,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:14,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 15:57:14,602 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)] === [2024-06-21 15:57:14,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:14,603 INFO L85 PathProgramCache]: Analyzing trace with hash -2128800201, now seen corresponding path program 5 times [2024-06-21 15:57:14,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:14,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030854440] [2024-06-21 15:57:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:14,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:14,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:14,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030854440] [2024-06-21 15:57:14,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030854440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:14,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:14,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:14,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618849149] [2024-06-21 15:57:14,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:14,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:14,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:14,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:14,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:14,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:14,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 264 transitions, 3458 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:14,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:14,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:14,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:15,099 INFO L124 PetriNetUnfolderBase]: 1810/3080 cut-off events. [2024-06-21 15:57:15,104 INFO L125 PetriNetUnfolderBase]: For 123431/123431 co-relation queries the response was YES. [2024-06-21 15:57:15,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18716 conditions, 3080 events. 1810/3080 cut-off events. For 123431/123431 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 18670 event pairs, 385 based on Foata normal form. 1/3068 useless extension candidates. Maximal degree in co-relation 18621. Up to 2588 conditions per place. [2024-06-21 15:57:15,130 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 188 selfloop transitions, 96 changer transitions 0/292 dead transitions. [2024-06-21 15:57:15,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 292 transitions, 4366 flow [2024-06-21 15:57:15,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:15,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 15:57:15,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 15:57:15,131 INFO L175 Difference]: Start difference. First operand has 194 places, 264 transitions, 3458 flow. Second operand 6 states and 156 transitions. [2024-06-21 15:57:15,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 292 transitions, 4366 flow [2024-06-21 15:57:15,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 292 transitions, 4204 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-21 15:57:15,422 INFO L231 Difference]: Finished difference. Result has 199 places, 268 transitions, 3627 flow [2024-06-21 15:57:15,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3304, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3627, PETRI_PLACES=199, PETRI_TRANSITIONS=268} [2024-06-21 15:57:15,423 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-21 15:57:15,423 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 268 transitions, 3627 flow [2024-06-21 15:57:15,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:15,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:15,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:15,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 15:57:15,424 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)] === [2024-06-21 15:57:15,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:15,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2135466441, now seen corresponding path program 6 times [2024-06-21 15:57:15,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:15,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008938432] [2024-06-21 15:57:15,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:15,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:15,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:15,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008938432] [2024-06-21 15:57:15,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008938432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:15,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:15,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:15,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149438409] [2024-06-21 15:57:15,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:15,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:15,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:15,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:15,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:15,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:15,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 268 transitions, 3627 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:15,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:15,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:15,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:16,068 INFO L124 PetriNetUnfolderBase]: 1807/3080 cut-off events. [2024-06-21 15:57:16,069 INFO L125 PetriNetUnfolderBase]: For 126414/126416 co-relation queries the response was YES. [2024-06-21 15:57:16,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18932 conditions, 3080 events. 1807/3080 cut-off events. For 126414/126416 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18664 event pairs, 371 based on Foata normal form. 1/3079 useless extension candidates. Maximal degree in co-relation 18835. Up to 2586 conditions per place. [2024-06-21 15:57:16,094 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 194 selfloop transitions, 95 changer transitions 0/297 dead transitions. [2024-06-21 15:57:16,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 297 transitions, 4399 flow [2024-06-21 15:57:16,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:16,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:16,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 15:57:16,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-21 15:57:16,096 INFO L175 Difference]: Start difference. First operand has 199 places, 268 transitions, 3627 flow. Second operand 7 states and 180 transitions. [2024-06-21 15:57:16,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 297 transitions, 4399 flow [2024-06-21 15:57:16,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 297 transitions, 4257 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:16,385 INFO L231 Difference]: Finished difference. Result has 203 places, 268 transitions, 3707 flow [2024-06-21 15:57:16,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3485, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3707, PETRI_PLACES=203, PETRI_TRANSITIONS=268} [2024-06-21 15:57:16,386 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-21 15:57:16,386 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 268 transitions, 3707 flow [2024-06-21 15:57:16,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:16,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:16,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:16,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 15:57:16,387 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)] === [2024-06-21 15:57:16,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:16,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1431291110, now seen corresponding path program 1 times [2024-06-21 15:57:16,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:16,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263452225] [2024-06-21 15:57:16,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:16,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:16,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:16,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263452225] [2024-06-21 15:57:16,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263452225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:16,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:16,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:16,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733612218] [2024-06-21 15:57:16,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:16,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:16,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:16,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:16,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:16,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:16,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 268 transitions, 3707 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:16,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:16,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:16,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:17,046 INFO L124 PetriNetUnfolderBase]: 1828/3116 cut-off events. [2024-06-21 15:57:17,047 INFO L125 PetriNetUnfolderBase]: For 136435/136441 co-relation queries the response was YES. [2024-06-21 15:57:17,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19486 conditions, 3116 events. 1828/3116 cut-off events. For 136435/136441 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 18982 event pairs, 394 based on Foata normal form. 2/3114 useless extension candidates. Maximal degree in co-relation 19388. Up to 2652 conditions per place. [2024-06-21 15:57:17,072 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 212 selfloop transitions, 80 changer transitions 0/300 dead transitions. [2024-06-21 15:57:17,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 300 transitions, 4718 flow [2024-06-21 15:57:17,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:17,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:17,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 15:57:17,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 15:57:17,074 INFO L175 Difference]: Start difference. First operand has 203 places, 268 transitions, 3707 flow. Second operand 6 states and 153 transitions. [2024-06-21 15:57:17,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 300 transitions, 4718 flow [2024-06-21 15:57:17,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 300 transitions, 4574 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:17,315 INFO L231 Difference]: Finished difference. Result has 204 places, 277 transitions, 3886 flow [2024-06-21 15:57:17,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3570, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3886, PETRI_PLACES=204, PETRI_TRANSITIONS=277} [2024-06-21 15:57:17,316 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-21 15:57:17,316 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 277 transitions, 3886 flow [2024-06-21 15:57:17,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:17,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:17,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:17,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 15:57:17,317 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)] === [2024-06-21 15:57:17,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:17,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1431170954, now seen corresponding path program 1 times [2024-06-21 15:57:17,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:17,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771337885] [2024-06-21 15:57:17,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:17,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:17,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:17,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771337885] [2024-06-21 15:57:17,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771337885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:17,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:17,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:17,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825884836] [2024-06-21 15:57:17,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:17,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:17,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:17,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:17,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:17,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:17,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 277 transitions, 3886 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:17,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:17,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:17,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:17,864 INFO L124 PetriNetUnfolderBase]: 1841/3133 cut-off events. [2024-06-21 15:57:17,864 INFO L125 PetriNetUnfolderBase]: For 138034/138042 co-relation queries the response was YES. [2024-06-21 15:57:17,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19660 conditions, 3133 events. 1841/3133 cut-off events. For 138034/138042 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 19074 event pairs, 396 based on Foata normal form. 2/3130 useless extension candidates. Maximal degree in co-relation 19562. Up to 2577 conditions per place. [2024-06-21 15:57:17,890 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 220 selfloop transitions, 89 changer transitions 0/317 dead transitions. [2024-06-21 15:57:17,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 317 transitions, 4974 flow [2024-06-21 15:57:17,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:17,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:17,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 15:57:17,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:57:17,891 INFO L175 Difference]: Start difference. First operand has 204 places, 277 transitions, 3886 flow. Second operand 7 states and 175 transitions. [2024-06-21 15:57:17,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 317 transitions, 4974 flow [2024-06-21 15:57:18,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 317 transitions, 4851 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-21 15:57:18,243 INFO L231 Difference]: Finished difference. Result has 211 places, 292 transitions, 4215 flow [2024-06-21 15:57:18,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3763, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4215, PETRI_PLACES=211, PETRI_TRANSITIONS=292} [2024-06-21 15:57:18,244 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-21 15:57:18,244 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 292 transitions, 4215 flow [2024-06-21 15:57:18,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:18,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:18,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:18,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 15:57:18,245 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)] === [2024-06-21 15:57:18,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:18,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1431171140, now seen corresponding path program 2 times [2024-06-21 15:57:18,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:18,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562596603] [2024-06-21 15:57:18,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:18,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:18,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:18,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:18,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562596603] [2024-06-21 15:57:18,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562596603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:18,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:18,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:18,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460634302] [2024-06-21 15:57:18,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:18,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:18,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:18,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:18,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:18,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:18,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 292 transitions, 4215 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:18,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:18,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:18,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:18,805 INFO L124 PetriNetUnfolderBase]: 1846/3144 cut-off events. [2024-06-21 15:57:18,806 INFO L125 PetriNetUnfolderBase]: For 146197/146205 co-relation queries the response was YES. [2024-06-21 15:57:18,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20408 conditions, 3144 events. 1846/3144 cut-off events. For 146197/146205 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19170 event pairs, 392 based on Foata normal form. 2/3141 useless extension candidates. Maximal degree in co-relation 20307. Up to 2676 conditions per place. [2024-06-21 15:57:18,832 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 230 selfloop transitions, 80 changer transitions 0/318 dead transitions. [2024-06-21 15:57:18,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 318 transitions, 5063 flow [2024-06-21 15:57:18,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:18,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:18,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 15:57:18,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-21 15:57:18,833 INFO L175 Difference]: Start difference. First operand has 211 places, 292 transitions, 4215 flow. Second operand 7 states and 171 transitions. [2024-06-21 15:57:18,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 318 transitions, 5063 flow [2024-06-21 15:57:19,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 318 transitions, 4975 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-21 15:57:19,258 INFO L231 Difference]: Finished difference. Result has 216 places, 295 transitions, 4343 flow [2024-06-21 15:57:19,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4127, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4343, PETRI_PLACES=216, PETRI_TRANSITIONS=295} [2024-06-21 15:57:19,259 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-21 15:57:19,259 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 295 transitions, 4343 flow [2024-06-21 15:57:19,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:19,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:19,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:19,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 15:57:19,260 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)] === [2024-06-21 15:57:19,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:19,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1743932792, now seen corresponding path program 3 times [2024-06-21 15:57:19,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:19,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288293666] [2024-06-21 15:57:19,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:19,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:19,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:19,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288293666] [2024-06-21 15:57:19,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288293666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:19,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:19,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:19,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271523487] [2024-06-21 15:57:19,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:19,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:19,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:19,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:19,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:19,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:19,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 295 transitions, 4343 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:19,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:19,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:19,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:19,819 INFO L124 PetriNetUnfolderBase]: 1843/3142 cut-off events. [2024-06-21 15:57:19,819 INFO L125 PetriNetUnfolderBase]: For 148280/148282 co-relation queries the response was YES. [2024-06-21 15:57:19,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20475 conditions, 3142 events. 1843/3142 cut-off events. For 148280/148282 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19130 event pairs, 369 based on Foata normal form. 1/3141 useless extension candidates. Maximal degree in co-relation 20372. Up to 2787 conditions per place. [2024-06-21 15:57:19,847 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 269 selfloop transitions, 36 changer transitions 0/313 dead transitions. [2024-06-21 15:57:19,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 313 transitions, 5023 flow [2024-06-21 15:57:19,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:19,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:19,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 15:57:19,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-21 15:57:19,848 INFO L175 Difference]: Start difference. First operand has 216 places, 295 transitions, 4343 flow. Second operand 7 states and 166 transitions. [2024-06-21 15:57:19,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 313 transitions, 5023 flow [2024-06-21 15:57:20,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 313 transitions, 4833 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:20,198 INFO L231 Difference]: Finished difference. Result has 218 places, 295 transitions, 4237 flow [2024-06-21 15:57:20,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4155, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4237, PETRI_PLACES=218, PETRI_TRANSITIONS=295} [2024-06-21 15:57:20,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-21 15:57:20,199 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 295 transitions, 4237 flow [2024-06-21 15:57:20,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:20,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:20,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:20,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 15:57:20,200 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)] === [2024-06-21 15:57:20,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:20,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1110561440, now seen corresponding path program 2 times [2024-06-21 15:57:20,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:20,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516011690] [2024-06-21 15:57:20,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:20,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:20,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:20,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516011690] [2024-06-21 15:57:20,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516011690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:20,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:20,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:20,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925653190] [2024-06-21 15:57:20,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:20,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:20,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:20,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:20,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:20,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:20,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 295 transitions, 4237 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:20,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:20,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:20,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:20,845 INFO L124 PetriNetUnfolderBase]: 1885/3206 cut-off events. [2024-06-21 15:57:20,845 INFO L125 PetriNetUnfolderBase]: For 158903/158905 co-relation queries the response was YES. [2024-06-21 15:57:20,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21060 conditions, 3206 events. 1885/3206 cut-off events. For 158903/158905 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 19549 event pairs, 370 based on Foata normal form. 2/3206 useless extension candidates. Maximal degree in co-relation 20956. Up to 2788 conditions per place. [2024-06-21 15:57:20,870 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 263 selfloop transitions, 65 changer transitions 0/336 dead transitions. [2024-06-21 15:57:20,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 336 transitions, 5482 flow [2024-06-21 15:57:20,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:20,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:20,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 15:57:20,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-21 15:57:20,872 INFO L175 Difference]: Start difference. First operand has 218 places, 295 transitions, 4237 flow. Second operand 8 states and 193 transitions. [2024-06-21 15:57:20,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 336 transitions, 5482 flow [2024-06-21 15:57:21,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 336 transitions, 5425 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:21,268 INFO L231 Difference]: Finished difference. Result has 222 places, 313 transitions, 4629 flow [2024-06-21 15:57:21,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4180, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4629, PETRI_PLACES=222, PETRI_TRANSITIONS=313} [2024-06-21 15:57:21,269 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-21 15:57:21,269 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 313 transitions, 4629 flow [2024-06-21 15:57:21,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:21,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:21,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:21,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 15:57:21,270 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)] === [2024-06-21 15:57:21,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:21,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1253802284, now seen corresponding path program 3 times [2024-06-21 15:57:21,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:21,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407440074] [2024-06-21 15:57:21,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:21,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:21,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:21,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407440074] [2024-06-21 15:57:21,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407440074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:21,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:21,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:21,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728375718] [2024-06-21 15:57:21,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:21,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:21,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:21,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:21,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:21,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:21,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 313 transitions, 4629 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:21,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:21,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:21,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:21,880 INFO L124 PetriNetUnfolderBase]: 1879/3196 cut-off events. [2024-06-21 15:57:21,881 INFO L125 PetriNetUnfolderBase]: For 164341/164343 co-relation queries the response was YES. [2024-06-21 15:57:21,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21503 conditions, 3196 events. 1879/3196 cut-off events. For 164341/164343 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19495 event pairs, 370 based on Foata normal form. 2/3196 useless extension candidates. Maximal degree in co-relation 21397. Up to 2784 conditions per place. [2024-06-21 15:57:21,911 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 263 selfloop transitions, 65 changer transitions 0/336 dead transitions. [2024-06-21 15:57:21,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 336 transitions, 5501 flow [2024-06-21 15:57:21,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:57:21,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:57:21,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-21 15:57:21,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-21 15:57:21,912 INFO L175 Difference]: Start difference. First operand has 222 places, 313 transitions, 4629 flow. Second operand 9 states and 211 transitions. [2024-06-21 15:57:21,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 336 transitions, 5501 flow [2024-06-21 15:57:22,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 336 transitions, 5293 flow, removed 82 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:22,360 INFO L231 Difference]: Finished difference. Result has 228 places, 313 transitions, 4561 flow [2024-06-21 15:57:22,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4421, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4561, PETRI_PLACES=228, PETRI_TRANSITIONS=313} [2024-06-21 15:57:22,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-21 15:57:22,361 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 313 transitions, 4561 flow [2024-06-21 15:57:22,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:22,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:22,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:22,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 15:57:22,362 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)] === [2024-06-21 15:57:22,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:22,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1571196638, now seen corresponding path program 1 times [2024-06-21 15:57:22,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:22,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233861464] [2024-06-21 15:57:22,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:22,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:22,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:22,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233861464] [2024-06-21 15:57:22,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233861464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:22,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:22,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:22,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868624409] [2024-06-21 15:57:22,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:22,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:22,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:22,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:22,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:22,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:57:22,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 313 transitions, 4561 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-21 15:57:22,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:22,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:57:22,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:22,942 INFO L124 PetriNetUnfolderBase]: 1831/3145 cut-off events. [2024-06-21 15:57:22,942 INFO L125 PetriNetUnfolderBase]: For 180493/180495 co-relation queries the response was YES. [2024-06-21 15:57:22,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21252 conditions, 3145 events. 1831/3145 cut-off events. For 180493/180495 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19347 event pairs, 359 based on Foata normal form. 10/3132 useless extension candidates. Maximal degree in co-relation 21144. Up to 2624 conditions per place. [2024-06-21 15:57:22,971 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 253 selfloop transitions, 40 changer transitions 0/335 dead transitions. [2024-06-21 15:57:22,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 335 transitions, 5239 flow [2024-06-21 15:57:22,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:22,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:22,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 15:57:22,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-21 15:57:22,985 INFO L175 Difference]: Start difference. First operand has 228 places, 313 transitions, 4561 flow. Second operand 7 states and 172 transitions. [2024-06-21 15:57:23,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 335 transitions, 5239 flow [2024-06-21 15:57:23,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 335 transitions, 5097 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 15:57:23,439 INFO L231 Difference]: Finished difference. Result has 228 places, 314 transitions, 4519 flow [2024-06-21 15:57:23,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4419, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4519, PETRI_PLACES=228, PETRI_TRANSITIONS=314} [2024-06-21 15:57:23,440 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-21 15:57:23,440 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 314 transitions, 4519 flow [2024-06-21 15:57:23,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-21 15:57:23,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:23,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:23,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 15:57:23,440 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)] === [2024-06-21 15:57:23,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:23,441 INFO L85 PathProgramCache]: Analyzing trace with hash -466733658, now seen corresponding path program 4 times [2024-06-21 15:57:23,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:23,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303718564] [2024-06-21 15:57:23,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:23,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:23,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:23,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303718564] [2024-06-21 15:57:23,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303718564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:23,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:23,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:23,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544133958] [2024-06-21 15:57:23,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:23,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:23,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:23,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:23,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:23,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:23,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 314 transitions, 4519 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:23,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:23,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:23,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:23,959 INFO L124 PetriNetUnfolderBase]: 1920/3259 cut-off events. [2024-06-21 15:57:23,959 INFO L125 PetriNetUnfolderBase]: For 176658/176664 co-relation queries the response was YES. [2024-06-21 15:57:23,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22013 conditions, 3259 events. 1920/3259 cut-off events. For 176658/176664 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 19951 event pairs, 409 based on Foata normal form. 5/3254 useless extension candidates. Maximal degree in co-relation 21904. Up to 2785 conditions per place. [2024-06-21 15:57:23,987 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 247 selfloop transitions, 83 changer transitions 0/338 dead transitions. [2024-06-21 15:57:23,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 338 transitions, 5531 flow [2024-06-21 15:57:23,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:23,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:23,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 15:57:23,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-21 15:57:23,989 INFO L175 Difference]: Start difference. First operand has 228 places, 314 transitions, 4519 flow. Second operand 6 states and 149 transitions. [2024-06-21 15:57:23,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 338 transitions, 5531 flow [2024-06-21 15:57:24,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 338 transitions, 5451 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:24,384 INFO L231 Difference]: Finished difference. Result has 229 places, 317 transitions, 4668 flow [2024-06-21 15:57:24,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4439, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4668, PETRI_PLACES=229, PETRI_TRANSITIONS=317} [2024-06-21 15:57:24,385 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-21 15:57:24,385 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 317 transitions, 4668 flow [2024-06-21 15:57:24,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:24,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:24,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:24,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 15:57:24,385 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)] === [2024-06-21 15:57:24,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:24,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1922721958, now seen corresponding path program 5 times [2024-06-21 15:57:24,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:24,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352070682] [2024-06-21 15:57:24,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:24,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:24,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:24,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352070682] [2024-06-21 15:57:24,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352070682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:24,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:24,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:24,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867841145] [2024-06-21 15:57:24,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:24,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:24,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:24,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:24,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:24,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:24,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 317 transitions, 4668 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:24,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:24,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:24,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:24,911 INFO L124 PetriNetUnfolderBase]: 1925/3270 cut-off events. [2024-06-21 15:57:24,911 INFO L125 PetriNetUnfolderBase]: For 182611/182617 co-relation queries the response was YES. [2024-06-21 15:57:24,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22265 conditions, 3270 events. 1925/3270 cut-off events. For 182611/182617 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20040 event pairs, 409 based on Foata normal form. 5/3265 useless extension candidates. Maximal degree in co-relation 22155. Up to 2791 conditions per place. [2024-06-21 15:57:24,940 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 242 selfloop transitions, 88 changer transitions 0/338 dead transitions. [2024-06-21 15:57:24,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 338 transitions, 5577 flow [2024-06-21 15:57:24,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:24,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:24,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 15:57:24,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-21 15:57:24,941 INFO L175 Difference]: Start difference. First operand has 229 places, 317 transitions, 4668 flow. Second operand 6 states and 145 transitions. [2024-06-21 15:57:24,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 338 transitions, 5577 flow [2024-06-21 15:57:25,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 338 transitions, 5287 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:25,357 INFO L231 Difference]: Finished difference. Result has 230 places, 321 transitions, 4637 flow [2024-06-21 15:57:25,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4399, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4637, PETRI_PLACES=230, PETRI_TRANSITIONS=321} [2024-06-21 15:57:25,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-21 15:57:25,357 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 321 transitions, 4637 flow [2024-06-21 15:57:25,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:25,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:25,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:25,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 15:57:25,358 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)] === [2024-06-21 15:57:25,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:25,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1716411194, now seen corresponding path program 6 times [2024-06-21 15:57:25,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:25,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117315528] [2024-06-21 15:57:25,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:25,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:25,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:25,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117315528] [2024-06-21 15:57:25,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117315528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:25,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:25,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:25,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278080463] [2024-06-21 15:57:25,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:25,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:25,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:25,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:25,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:25,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:25,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 321 transitions, 4637 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:25,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:25,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:25,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:25,932 INFO L124 PetriNetUnfolderBase]: 1930/3270 cut-off events. [2024-06-21 15:57:25,933 INFO L125 PetriNetUnfolderBase]: For 184951/184951 co-relation queries the response was YES. [2024-06-21 15:57:25,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22313 conditions, 3270 events. 1930/3270 cut-off events. For 184951/184951 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20061 event pairs, 412 based on Foata normal form. 1/3253 useless extension candidates. Maximal degree in co-relation 22204. Up to 2797 conditions per place. [2024-06-21 15:57:25,964 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 243 selfloop transitions, 94 changer transitions 0/345 dead transitions. [2024-06-21 15:57:25,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 345 transitions, 5555 flow [2024-06-21 15:57:25,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:25,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:25,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 15:57:25,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-21 15:57:25,966 INFO L175 Difference]: Start difference. First operand has 230 places, 321 transitions, 4637 flow. Second operand 7 states and 167 transitions. [2024-06-21 15:57:25,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 345 transitions, 5555 flow [2024-06-21 15:57:26,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 345 transitions, 5424 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 15:57:26,503 INFO L231 Difference]: Finished difference. Result has 235 places, 324 transitions, 4756 flow [2024-06-21 15:57:26,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4509, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4756, PETRI_PLACES=235, PETRI_TRANSITIONS=324} [2024-06-21 15:57:26,503 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-21 15:57:26,503 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 324 transitions, 4756 flow [2024-06-21 15:57:26,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:26,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:26,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:26,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 15:57:26,504 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)] === [2024-06-21 15:57:26,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:26,504 INFO L85 PathProgramCache]: Analyzing trace with hash -383159096, now seen corresponding path program 4 times [2024-06-21 15:57:26,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:26,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38234526] [2024-06-21 15:57:26,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:26,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:26,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:26,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38234526] [2024-06-21 15:57:26,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38234526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:26,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:26,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:26,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875395588] [2024-06-21 15:57:26,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:26,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:26,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:26,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:26,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:26,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:26,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 324 transitions, 4756 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:26,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:26,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:26,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:27,137 INFO L124 PetriNetUnfolderBase]: 1935/3275 cut-off events. [2024-06-21 15:57:27,137 INFO L125 PetriNetUnfolderBase]: For 191543/191543 co-relation queries the response was YES. [2024-06-21 15:57:27,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22534 conditions, 3275 events. 1935/3275 cut-off events. For 191543/191543 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20019 event pairs, 420 based on Foata normal form. 1/3256 useless extension candidates. Maximal degree in co-relation 22424. Up to 2693 conditions per place. [2024-06-21 15:57:27,171 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 230 selfloop transitions, 115 changer transitions 0/353 dead transitions. [2024-06-21 15:57:27,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 353 transitions, 6004 flow [2024-06-21 15:57:27,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:27,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:27,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 15:57:27,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-21 15:57:27,172 INFO L175 Difference]: Start difference. First operand has 235 places, 324 transitions, 4756 flow. Second operand 7 states and 172 transitions. [2024-06-21 15:57:27,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 353 transitions, 6004 flow [2024-06-21 15:57:27,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 353 transitions, 5867 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:27,686 INFO L231 Difference]: Finished difference. Result has 238 places, 330 transitions, 4985 flow [2024-06-21 15:57:27,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4619, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4985, PETRI_PLACES=238, PETRI_TRANSITIONS=330} [2024-06-21 15:57:27,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-21 15:57:27,686 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 330 transitions, 4985 flow [2024-06-21 15:57:27,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:27,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:27,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:27,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 15:57:27,687 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)] === [2024-06-21 15:57:27,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:27,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1336875236, now seen corresponding path program 7 times [2024-06-21 15:57:27,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:27,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380785531] [2024-06-21 15:57:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:27,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:27,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:27,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380785531] [2024-06-21 15:57:27,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380785531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:27,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:27,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:27,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211799659] [2024-06-21 15:57:27,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:27,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:27,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:27,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:27,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:27,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:27,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 330 transitions, 4985 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:27,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:27,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:27,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:28,275 INFO L124 PetriNetUnfolderBase]: 1932/3278 cut-off events. [2024-06-21 15:57:28,275 INFO L125 PetriNetUnfolderBase]: For 197152/197152 co-relation queries the response was YES. [2024-06-21 15:57:28,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22670 conditions, 3278 events. 1932/3278 cut-off events. For 197152/197152 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20089 event pairs, 408 based on Foata normal form. 1/3264 useless extension candidates. Maximal degree in co-relation 22558. Up to 2801 conditions per place. [2024-06-21 15:57:28,307 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 247 selfloop transitions, 96 changer transitions 0/351 dead transitions. [2024-06-21 15:57:28,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 351 transitions, 5977 flow [2024-06-21 15:57:28,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:57:28,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:57:28,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-21 15:57:28,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-21 15:57:28,308 INFO L175 Difference]: Start difference. First operand has 238 places, 330 transitions, 4985 flow. Second operand 9 states and 204 transitions. [2024-06-21 15:57:28,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 351 transitions, 5977 flow [2024-06-21 15:57:28,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 351 transitions, 5861 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-21 15:57:28,745 INFO L231 Difference]: Finished difference. Result has 245 places, 330 transitions, 5067 flow [2024-06-21 15:57:28,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4869, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5067, PETRI_PLACES=245, PETRI_TRANSITIONS=330} [2024-06-21 15:57:28,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-21 15:57:28,746 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 330 transitions, 5067 flow [2024-06-21 15:57:28,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:28,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:28,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:28,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 15:57:28,746 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)] === [2024-06-21 15:57:28,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:28,746 INFO L85 PathProgramCache]: Analyzing trace with hash -367844856, now seen corresponding path program 8 times [2024-06-21 15:57:28,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:28,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582862323] [2024-06-21 15:57:28,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:28,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:28,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:28,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582862323] [2024-06-21 15:57:28,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582862323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:28,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:28,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:28,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482428375] [2024-06-21 15:57:28,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:28,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:28,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:28,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:28,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:28,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:28,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 330 transitions, 5067 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:28,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:28,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:28,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:29,334 INFO L124 PetriNetUnfolderBase]: 1929/3270 cut-off events. [2024-06-21 15:57:29,334 INFO L125 PetriNetUnfolderBase]: For 201130/201130 co-relation queries the response was YES. [2024-06-21 15:57:29,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22786 conditions, 3270 events. 1929/3270 cut-off events. For 201130/201130 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 19980 event pairs, 408 based on Foata normal form. 1/3256 useless extension candidates. Maximal degree in co-relation 22671. Up to 2798 conditions per place. [2024-06-21 15:57:29,363 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 245 selfloop transitions, 95 changer transitions 0/348 dead transitions. [2024-06-21 15:57:29,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 348 transitions, 5929 flow [2024-06-21 15:57:29,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:29,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 15:57:29,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-21 15:57:29,364 INFO L175 Difference]: Start difference. First operand has 245 places, 330 transitions, 5067 flow. Second operand 7 states and 165 transitions. [2024-06-21 15:57:29,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 348 transitions, 5929 flow [2024-06-21 15:57:29,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 348 transitions, 5711 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:29,914 INFO L231 Difference]: Finished difference. Result has 247 places, 330 transitions, 5045 flow [2024-06-21 15:57:29,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4849, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5045, PETRI_PLACES=247, PETRI_TRANSITIONS=330} [2024-06-21 15:57:29,914 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-21 15:57:29,915 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 330 transitions, 5045 flow [2024-06-21 15:57:29,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:29,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:29,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:29,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 15:57:29,915 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)] === [2024-06-21 15:57:29,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:29,916 INFO L85 PathProgramCache]: Analyzing trace with hash 625864, now seen corresponding path program 5 times [2024-06-21 15:57:29,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:29,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139499136] [2024-06-21 15:57:29,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:29,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:29,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:29,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:29,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139499136] [2024-06-21 15:57:29,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139499136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:29,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:29,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:29,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816440585] [2024-06-21 15:57:29,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:29,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:29,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:29,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:29,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:30,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:30,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 330 transitions, 5045 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:30,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:30,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:30,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:30,465 INFO L124 PetriNetUnfolderBase]: 1942/3289 cut-off events. [2024-06-21 15:57:30,465 INFO L125 PetriNetUnfolderBase]: For 210500/210500 co-relation queries the response was YES. [2024-06-21 15:57:30,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22974 conditions, 3289 events. 1942/3289 cut-off events. For 210500/210500 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 20132 event pairs, 420 based on Foata normal form. 1/3270 useless extension candidates. Maximal degree in co-relation 22858. Up to 2699 conditions per place. [2024-06-21 15:57:30,496 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 227 selfloop transitions, 121 changer transitions 0/356 dead transitions. [2024-06-21 15:57:30,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 356 transitions, 6289 flow [2024-06-21 15:57:30,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:30,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:30,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 15:57:30,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-21 15:57:30,497 INFO L175 Difference]: Start difference. First operand has 247 places, 330 transitions, 5045 flow. Second operand 7 states and 170 transitions. [2024-06-21 15:57:30,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 356 transitions, 6289 flow [2024-06-21 15:57:31,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 356 transitions, 6099 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:31,141 INFO L231 Difference]: Finished difference. Result has 248 places, 336 transitions, 5215 flow [2024-06-21 15:57:31,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4855, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5215, PETRI_PLACES=248, PETRI_TRANSITIONS=336} [2024-06-21 15:57:31,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-21 15:57:31,142 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 336 transitions, 5215 flow [2024-06-21 15:57:31,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:31,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:31,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:31,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 15:57:31,142 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)] === [2024-06-21 15:57:31,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:31,142 INFO L85 PathProgramCache]: Analyzing trace with hash -338883582, now seen corresponding path program 6 times [2024-06-21 15:57:31,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:31,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241670280] [2024-06-21 15:57:31,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:31,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:31,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:31,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241670280] [2024-06-21 15:57:31,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241670280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:31,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:31,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:31,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272293149] [2024-06-21 15:57:31,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:31,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:31,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:31,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:31,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:31,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:31,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 336 transitions, 5215 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:31,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:31,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:31,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:31,807 INFO L124 PetriNetUnfolderBase]: 1939/3295 cut-off events. [2024-06-21 15:57:31,808 INFO L125 PetriNetUnfolderBase]: For 213908/213918 co-relation queries the response was YES. [2024-06-21 15:57:31,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23052 conditions, 3295 events. 1939/3295 cut-off events. For 213908/213918 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20223 event pairs, 401 based on Foata normal form. 1/3291 useless extension candidates. Maximal degree in co-relation 22935. Up to 2943 conditions per place. [2024-06-21 15:57:31,836 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 300 selfloop transitions, 42 changer transitions 0/350 dead transitions. [2024-06-21 15:57:31,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 350 transitions, 5939 flow [2024-06-21 15:57:31,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:31,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:31,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-21 15:57:31,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-21 15:57:31,837 INFO L175 Difference]: Start difference. First operand has 248 places, 336 transitions, 5215 flow. Second operand 7 states and 162 transitions. [2024-06-21 15:57:31,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 350 transitions, 5939 flow [2024-06-21 15:57:32,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 350 transitions, 5681 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:32,365 INFO L231 Difference]: Finished difference. Result has 252 places, 336 transitions, 5047 flow [2024-06-21 15:57:32,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4957, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5047, PETRI_PLACES=252, PETRI_TRANSITIONS=336} [2024-06-21 15:57:32,366 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-21 15:57:32,366 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 336 transitions, 5047 flow [2024-06-21 15:57:32,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:32,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:32,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:32,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 15:57:32,367 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)] === [2024-06-21 15:57:32,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:32,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1346615170, now seen corresponding path program 7 times [2024-06-21 15:57:32,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:32,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707363892] [2024-06-21 15:57:32,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:32,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:32,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:32,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707363892] [2024-06-21 15:57:32,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707363892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:32,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:32,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:32,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363899006] [2024-06-21 15:57:32,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:32,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:32,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:32,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:32,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:32,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:32,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 336 transitions, 5047 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:32,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:32,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:32,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:32,971 INFO L124 PetriNetUnfolderBase]: 1960/3333 cut-off events. [2024-06-21 15:57:32,971 INFO L125 PetriNetUnfolderBase]: For 220585/220587 co-relation queries the response was YES. [2024-06-21 15:57:32,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23275 conditions, 3333 events. 1960/3333 cut-off events. For 220585/220587 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20503 event pairs, 388 based on Foata normal form. 1/3331 useless extension candidates. Maximal degree in co-relation 23157. Up to 2869 conditions per place. [2024-06-21 15:57:33,003 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 289 selfloop transitions, 74 changer transitions 0/371 dead transitions. [2024-06-21 15:57:33,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 371 transitions, 6170 flow [2024-06-21 15:57:33,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:33,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:33,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 15:57:33,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-21 15:57:33,004 INFO L175 Difference]: Start difference. First operand has 252 places, 336 transitions, 5047 flow. Second operand 6 states and 159 transitions. [2024-06-21 15:57:33,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 371 transitions, 6170 flow [2024-06-21 15:57:33,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 371 transitions, 6062 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:33,524 INFO L231 Difference]: Finished difference. Result has 253 places, 345 transitions, 5330 flow [2024-06-21 15:57:33,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4939, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5330, PETRI_PLACES=253, PETRI_TRANSITIONS=345} [2024-06-21 15:57:33,525 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-21 15:57:33,525 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 345 transitions, 5330 flow [2024-06-21 15:57:33,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:33,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:33,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:33,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 15:57:33,525 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)] === [2024-06-21 15:57:33,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:33,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1708159316, now seen corresponding path program 8 times [2024-06-21 15:57:33,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:33,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270350331] [2024-06-21 15:57:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:33,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:33,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:33,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270350331] [2024-06-21 15:57:33,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270350331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:33,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:33,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:33,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050392745] [2024-06-21 15:57:33,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:33,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:33,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:33,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:33,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:33,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:33,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 345 transitions, 5330 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:33,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:33,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:33,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:34,221 INFO L124 PetriNetUnfolderBase]: 1957/3329 cut-off events. [2024-06-21 15:57:34,221 INFO L125 PetriNetUnfolderBase]: For 226279/226281 co-relation queries the response was YES. [2024-06-21 15:57:34,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23586 conditions, 3329 events. 1957/3329 cut-off events. For 226279/226281 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20486 event pairs, 388 based on Foata normal form. 1/3327 useless extension candidates. Maximal degree in co-relation 23466. Up to 2867 conditions per place. [2024-06-21 15:57:34,248 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 290 selfloop transitions, 81 changer transitions 0/379 dead transitions. [2024-06-21 15:57:34,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 379 transitions, 6343 flow [2024-06-21 15:57:34,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:34,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 15:57:34,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 15:57:34,249 INFO L175 Difference]: Start difference. First operand has 253 places, 345 transitions, 5330 flow. Second operand 8 states and 205 transitions. [2024-06-21 15:57:34,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 379 transitions, 6343 flow [2024-06-21 15:57:34,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 379 transitions, 6212 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:34,879 INFO L231 Difference]: Finished difference. Result has 258 places, 346 transitions, 5411 flow [2024-06-21 15:57:34,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5199, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5411, PETRI_PLACES=258, PETRI_TRANSITIONS=346} [2024-06-21 15:57:34,880 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-21 15:57:34,880 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 346 transitions, 5411 flow [2024-06-21 15:57:34,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:34,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:34,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:34,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 15:57:34,881 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)] === [2024-06-21 15:57:34,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:34,881 INFO L85 PathProgramCache]: Analyzing trace with hash 144696342, now seen corresponding path program 9 times [2024-06-21 15:57:34,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:34,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527904413] [2024-06-21 15:57:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:34,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:34,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:34,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:34,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527904413] [2024-06-21 15:57:34,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527904413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:34,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:34,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:34,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272860222] [2024-06-21 15:57:34,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:34,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:34,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:34,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:34,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:34,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:34,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 346 transitions, 5411 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:34,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:34,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:34,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:35,477 INFO L124 PetriNetUnfolderBase]: 1978/3358 cut-off events. [2024-06-21 15:57:35,477 INFO L125 PetriNetUnfolderBase]: For 237946/237946 co-relation queries the response was YES. [2024-06-21 15:57:35,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24087 conditions, 3358 events. 1978/3358 cut-off events. For 237946/237946 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20590 event pairs, 399 based on Foata normal form. 1/3346 useless extension candidates. Maximal degree in co-relation 23966. Up to 2715 conditions per place. [2024-06-21 15:57:35,509 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 227 selfloop transitions, 147 changer transitions 0/382 dead transitions. [2024-06-21 15:57:35,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 382 transitions, 6694 flow [2024-06-21 15:57:35,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:35,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 15:57:35,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-21 15:57:35,510 INFO L175 Difference]: Start difference. First operand has 258 places, 346 transitions, 5411 flow. Second operand 7 states and 179 transitions. [2024-06-21 15:57:35,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 382 transitions, 6694 flow [2024-06-21 15:57:36,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 382 transitions, 6461 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 15:57:36,155 INFO L231 Difference]: Finished difference. Result has 260 places, 356 transitions, 5804 flow [2024-06-21 15:57:36,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5184, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5804, PETRI_PLACES=260, PETRI_TRANSITIONS=356} [2024-06-21 15:57:36,156 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-21 15:57:36,156 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 356 transitions, 5804 flow [2024-06-21 15:57:36,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:36,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:36,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:36,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 15:57:36,157 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)] === [2024-06-21 15:57:36,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:36,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1568028826, now seen corresponding path program 9 times [2024-06-21 15:57:36,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:36,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889505892] [2024-06-21 15:57:36,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:36,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:36,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:36,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889505892] [2024-06-21 15:57:36,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889505892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:36,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:36,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:36,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427961963] [2024-06-21 15:57:36,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:36,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:36,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:36,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:36,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:36,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:36,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 356 transitions, 5804 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:36,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:36,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:36,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:36,823 INFO L124 PetriNetUnfolderBase]: 1975/3357 cut-off events. [2024-06-21 15:57:36,823 INFO L125 PetriNetUnfolderBase]: For 239255/239255 co-relation queries the response was YES. [2024-06-21 15:57:36,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24791 conditions, 3357 events. 1975/3357 cut-off events. For 239255/239255 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20670 event pairs, 392 based on Foata normal form. 1/3345 useless extension candidates. Maximal degree in co-relation 24668. Up to 2826 conditions per place. [2024-06-21 15:57:36,857 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 272 selfloop transitions, 99 changer transitions 0/379 dead transitions. [2024-06-21 15:57:36,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 379 transitions, 6758 flow [2024-06-21 15:57:36,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:36,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 15:57:36,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-21 15:57:36,858 INFO L175 Difference]: Start difference. First operand has 260 places, 356 transitions, 5804 flow. Second operand 6 states and 155 transitions. [2024-06-21 15:57:36,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 379 transitions, 6758 flow [2024-06-21 15:57:37,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 379 transitions, 6592 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:37,537 INFO L231 Difference]: Finished difference. Result has 262 places, 356 transitions, 5849 flow [2024-06-21 15:57:37,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5638, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5849, PETRI_PLACES=262, PETRI_TRANSITIONS=356} [2024-06-21 15:57:37,538 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 220 predicate places. [2024-06-21 15:57:37,538 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 356 transitions, 5849 flow [2024-06-21 15:57:37,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:37,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:37,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:37,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 15:57:37,539 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)] === [2024-06-21 15:57:37,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:37,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1568295736, now seen corresponding path program 10 times [2024-06-21 15:57:37,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:37,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955412124] [2024-06-21 15:57:37,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:37,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:37,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:37,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955412124] [2024-06-21 15:57:37,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955412124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:37,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:37,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:37,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17976551] [2024-06-21 15:57:37,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:37,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:37,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:37,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:37,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:37,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:37,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 356 transitions, 5849 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:37,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:37,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:37,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:38,205 INFO L124 PetriNetUnfolderBase]: 1972/3359 cut-off events. [2024-06-21 15:57:38,205 INFO L125 PetriNetUnfolderBase]: For 240575/240577 co-relation queries the response was YES. [2024-06-21 15:57:38,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24828 conditions, 3359 events. 1972/3359 cut-off events. For 240575/240577 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20697 event pairs, 378 based on Foata normal form. 1/3358 useless extension candidates. Maximal degree in co-relation 24703. Up to 2823 conditions per place. [2024-06-21 15:57:38,240 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 275 selfloop transitions, 101 changer transitions 0/384 dead transitions. [2024-06-21 15:57:38,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 384 transitions, 6695 flow [2024-06-21 15:57:38,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:38,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:38,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 15:57:38,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-21 15:57:38,241 INFO L175 Difference]: Start difference. First operand has 262 places, 356 transitions, 5849 flow. Second operand 7 states and 179 transitions. [2024-06-21 15:57:38,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 384 transitions, 6695 flow [2024-06-21 15:57:38,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 384 transitions, 6465 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:38,949 INFO L231 Difference]: Finished difference. Result has 263 places, 356 transitions, 5863 flow [2024-06-21 15:57:38,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5619, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5863, PETRI_PLACES=263, PETRI_TRANSITIONS=356} [2024-06-21 15:57:38,950 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-21 15:57:38,950 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 356 transitions, 5863 flow [2024-06-21 15:57:38,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:38,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:38,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:38,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 15:57:38,950 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)] === [2024-06-21 15:57:38,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:38,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1694106086, now seen corresponding path program 10 times [2024-06-21 15:57:38,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:38,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611734452] [2024-06-21 15:57:38,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:38,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:39,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:39,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611734452] [2024-06-21 15:57:39,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611734452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:39,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:39,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:39,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740706203] [2024-06-21 15:57:39,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:39,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:39,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:39,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:39,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:39,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:39,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 356 transitions, 5863 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:39,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:39,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:39,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:39,621 INFO L124 PetriNetUnfolderBase]: 1982/3372 cut-off events. [2024-06-21 15:57:39,621 INFO L125 PetriNetUnfolderBase]: For 242695/242697 co-relation queries the response was YES. [2024-06-21 15:57:39,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25059 conditions, 3372 events. 1982/3372 cut-off events. For 242695/242697 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 20814 event pairs, 374 based on Foata normal form. 2/3372 useless extension candidates. Maximal degree in co-relation 24934. Up to 2719 conditions per place. [2024-06-21 15:57:39,656 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 232 selfloop transitions, 154 changer transitions 0/394 dead transitions. [2024-06-21 15:57:39,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 394 transitions, 7165 flow [2024-06-21 15:57:39,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:39,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 15:57:39,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-21 15:57:39,658 INFO L175 Difference]: Start difference. First operand has 263 places, 356 transitions, 5863 flow. Second operand 8 states and 206 transitions. [2024-06-21 15:57:39,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 394 transitions, 7165 flow [2024-06-21 15:57:40,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 394 transitions, 6890 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 15:57:40,518 INFO L231 Difference]: Finished difference. Result has 262 places, 362 transitions, 6067 flow [2024-06-21 15:57:40,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5600, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6067, PETRI_PLACES=262, PETRI_TRANSITIONS=362} [2024-06-21 15:57:40,519 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 220 predicate places. [2024-06-21 15:57:40,519 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 362 transitions, 6067 flow [2024-06-21 15:57:40,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:40,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:40,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:40,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 15:57:40,519 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)] === [2024-06-21 15:57:40,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:40,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1774711840, now seen corresponding path program 11 times [2024-06-21 15:57:40,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:40,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983894444] [2024-06-21 15:57:40,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:40,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:40,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:40,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983894444] [2024-06-21 15:57:40,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983894444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:40,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:40,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:40,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968487223] [2024-06-21 15:57:40,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:40,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:40,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:40,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:40,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:40,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:40,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 362 transitions, 6067 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:40,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:40,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:40,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:41,221 INFO L124 PetriNetUnfolderBase]: 1992/3390 cut-off events. [2024-06-21 15:57:41,222 INFO L125 PetriNetUnfolderBase]: For 230105/230107 co-relation queries the response was YES. [2024-06-21 15:57:41,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25054 conditions, 3390 events. 1992/3390 cut-off events. For 230105/230107 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20912 event pairs, 379 based on Foata normal form. 2/3390 useless extension candidates. Maximal degree in co-relation 24931. Up to 2730 conditions per place. [2024-06-21 15:57:41,255 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 233 selfloop transitions, 156 changer transitions 0/397 dead transitions. [2024-06-21 15:57:41,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 397 transitions, 7329 flow [2024-06-21 15:57:41,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:57:41,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:57:41,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-21 15:57:41,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-21 15:57:41,257 INFO L175 Difference]: Start difference. First operand has 262 places, 362 transitions, 6067 flow. Second operand 9 states and 222 transitions. [2024-06-21 15:57:41,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 397 transitions, 7329 flow [2024-06-21 15:57:41,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 397 transitions, 6954 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:41,992 INFO L231 Difference]: Finished difference. Result has 265 places, 368 transitions, 6145 flow [2024-06-21 15:57:41,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5712, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6145, PETRI_PLACES=265, PETRI_TRANSITIONS=368} [2024-06-21 15:57:41,993 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-21 15:57:41,993 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 368 transitions, 6145 flow [2024-06-21 15:57:41,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:41,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:41,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:41,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 15:57:41,994 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)] === [2024-06-21 15:57:41,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:41,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1346606242, now seen corresponding path program 2 times [2024-06-21 15:57:41,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:41,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061081562] [2024-06-21 15:57:41,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:41,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:42,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:42,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061081562] [2024-06-21 15:57:42,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061081562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:42,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:42,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:42,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006801761] [2024-06-21 15:57:42,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:42,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:42,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:42,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:42,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:42,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:57:42,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 368 transitions, 6145 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-21 15:57:42,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:42,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:57:42,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:42,682 INFO L124 PetriNetUnfolderBase]: 1929/3327 cut-off events. [2024-06-21 15:57:42,682 INFO L125 PetriNetUnfolderBase]: For 246453/246455 co-relation queries the response was YES. [2024-06-21 15:57:42,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24556 conditions, 3327 events. 1929/3327 cut-off events. For 246453/246455 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20797 event pairs, 283 based on Foata normal form. 9/3311 useless extension candidates. Maximal degree in co-relation 24433. Up to 2713 conditions per place. [2024-06-21 15:57:42,717 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 303 selfloop transitions, 32 changer transitions 0/391 dead transitions. [2024-06-21 15:57:42,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 391 transitions, 6919 flow [2024-06-21 15:57:42,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:42,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:42,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-21 15:57:42,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6682926829268293 [2024-06-21 15:57:42,719 INFO L175 Difference]: Start difference. First operand has 265 places, 368 transitions, 6145 flow. Second operand 5 states and 137 transitions. [2024-06-21 15:57:42,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 391 transitions, 6919 flow [2024-06-21 15:57:43,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 391 transitions, 6667 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:43,439 INFO L231 Difference]: Finished difference. Result has 264 places, 369 transitions, 5987 flow [2024-06-21 15:57:43,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5893, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5987, PETRI_PLACES=264, PETRI_TRANSITIONS=369} [2024-06-21 15:57:43,440 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-21 15:57:43,440 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 369 transitions, 5987 flow [2024-06-21 15:57:43,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-21 15:57:43,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:43,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:43,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 15:57:43,440 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)] === [2024-06-21 15:57:43,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:43,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1331369122, now seen corresponding path program 3 times [2024-06-21 15:57:43,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:43,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843704497] [2024-06-21 15:57:43,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:43,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:43,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:43,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:43,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843704497] [2024-06-21 15:57:43,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843704497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:43,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:43,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:43,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985651529] [2024-06-21 15:57:43,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:43,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:43,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:43,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:43,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:43,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:57:43,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 369 transitions, 5987 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-21 15:57:43,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:43,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:57:43,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:44,098 INFO L124 PetriNetUnfolderBase]: 1955/3369 cut-off events. [2024-06-21 15:57:44,098 INFO L125 PetriNetUnfolderBase]: For 243371/243373 co-relation queries the response was YES. [2024-06-21 15:57:44,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24556 conditions, 3369 events. 1955/3369 cut-off events. For 243371/243373 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21087 event pairs, 279 based on Foata normal form. 8/3352 useless extension candidates. Maximal degree in co-relation 24433. Up to 2723 conditions per place. [2024-06-21 15:57:44,131 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 305 selfloop transitions, 35 changer transitions 0/396 dead transitions. [2024-06-21 15:57:44,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 396 transitions, 6793 flow [2024-06-21 15:57:44,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:44,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:44,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 15:57:44,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-21 15:57:44,132 INFO L175 Difference]: Start difference. First operand has 264 places, 369 transitions, 5987 flow. Second operand 6 states and 159 transitions. [2024-06-21 15:57:44,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 396 transitions, 6793 flow [2024-06-21 15:57:44,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 396 transitions, 6737 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:44,731 INFO L231 Difference]: Finished difference. Result has 267 places, 370 transitions, 6023 flow [2024-06-21 15:57:44,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5931, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6023, PETRI_PLACES=267, PETRI_TRANSITIONS=370} [2024-06-21 15:57:44,732 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-21 15:57:44,732 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 370 transitions, 6023 flow [2024-06-21 15:57:44,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-21 15:57:44,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:44,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:44,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 15:57:44,733 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)] === [2024-06-21 15:57:44,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:44,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1774702912, now seen corresponding path program 4 times [2024-06-21 15:57:44,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:44,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402399344] [2024-06-21 15:57:44,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:44,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:44,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:44,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402399344] [2024-06-21 15:57:44,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402399344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:44,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:44,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:44,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289171331] [2024-06-21 15:57:44,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:44,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:44,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:44,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:44,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:44,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:57:44,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 370 transitions, 6023 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-21 15:57:44,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:44,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:57:44,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:45,357 INFO L124 PetriNetUnfolderBase]: 1965/3387 cut-off events. [2024-06-21 15:57:45,358 INFO L125 PetriNetUnfolderBase]: For 246169/246171 co-relation queries the response was YES. [2024-06-21 15:57:45,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24539 conditions, 3387 events. 1965/3387 cut-off events. For 246169/246171 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21208 event pairs, 372 based on Foata normal form. 10/3372 useless extension candidates. Maximal degree in co-relation 24415. Up to 2772 conditions per place. [2024-06-21 15:57:45,392 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 296 selfloop transitions, 39 changer transitions 0/391 dead transitions. [2024-06-21 15:57:45,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 391 transitions, 6793 flow [2024-06-21 15:57:45,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:45,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:45,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 15:57:45,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-21 15:57:45,393 INFO L175 Difference]: Start difference. First operand has 267 places, 370 transitions, 6023 flow. Second operand 6 states and 152 transitions. [2024-06-21 15:57:45,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 391 transitions, 6793 flow [2024-06-21 15:57:46,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 391 transitions, 6715 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:46,164 INFO L231 Difference]: Finished difference. Result has 269 places, 371 transitions, 6053 flow [2024-06-21 15:57:46,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5945, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6053, PETRI_PLACES=269, PETRI_TRANSITIONS=371} [2024-06-21 15:57:46,165 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-21 15:57:46,165 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 371 transitions, 6053 flow [2024-06-21 15:57:46,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-21 15:57:46,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:46,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:46,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 15:57:46,166 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)] === [2024-06-21 15:57:46,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:46,166 INFO L85 PathProgramCache]: Analyzing trace with hash -117245622, now seen corresponding path program 1 times [2024-06-21 15:57:46,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:46,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506338391] [2024-06-21 15:57:46,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:46,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:46,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:46,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:46,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506338391] [2024-06-21 15:57:46,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506338391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:46,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:46,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:46,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422014686] [2024-06-21 15:57:46,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:46,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:46,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:46,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:46,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:46,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:57:46,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 371 transitions, 6053 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:46,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:46,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:57:46,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:46,839 INFO L124 PetriNetUnfolderBase]: 2030/3522 cut-off events. [2024-06-21 15:57:46,840 INFO L125 PetriNetUnfolderBase]: For 266165/266181 co-relation queries the response was YES. [2024-06-21 15:57:46,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25597 conditions, 3522 events. 2030/3522 cut-off events. For 266165/266181 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 22517 event pairs, 381 based on Foata normal form. 12/3525 useless extension candidates. Maximal degree in co-relation 25472. Up to 2908 conditions per place. [2024-06-21 15:57:46,869 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 314 selfloop transitions, 38 changer transitions 0/397 dead transitions. [2024-06-21 15:57:46,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 397 transitions, 7009 flow [2024-06-21 15:57:46,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:46,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:46,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 15:57:46,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-21 15:57:46,870 INFO L175 Difference]: Start difference. First operand has 269 places, 371 transitions, 6053 flow. Second operand 6 states and 154 transitions. [2024-06-21 15:57:46,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 397 transitions, 7009 flow [2024-06-21 15:57:47,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 397 transitions, 6925 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:47,627 INFO L231 Difference]: Finished difference. Result has 271 places, 373 transitions, 6073 flow [2024-06-21 15:57:47,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5971, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6073, PETRI_PLACES=271, PETRI_TRANSITIONS=373} [2024-06-21 15:57:47,628 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-21 15:57:47,628 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 373 transitions, 6073 flow [2024-06-21 15:57:47,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:47,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:47,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:47,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 15:57:47,629 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)] === [2024-06-21 15:57:47,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:47,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1922731878, now seen corresponding path program 2 times [2024-06-21 15:57:47,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:47,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359051965] [2024-06-21 15:57:47,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:47,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:47,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:47,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:47,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359051965] [2024-06-21 15:57:47,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359051965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:47,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:47,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:47,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687235939] [2024-06-21 15:57:47,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:47,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:47,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:47,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:47,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:47,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:57:47,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 373 transitions, 6073 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:47,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:47,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:57:47,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:48,268 INFO L124 PetriNetUnfolderBase]: 2064/3571 cut-off events. [2024-06-21 15:57:48,268 INFO L125 PetriNetUnfolderBase]: For 270340/270356 co-relation queries the response was YES. [2024-06-21 15:57:48,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25794 conditions, 3571 events. 2064/3571 cut-off events. For 270340/270356 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 22846 event pairs, 411 based on Foata normal form. 14/3576 useless extension candidates. Maximal degree in co-relation 25668. Up to 3035 conditions per place. [2024-06-21 15:57:48,305 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 310 selfloop transitions, 36 changer transitions 0/391 dead transitions. [2024-06-21 15:57:48,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 391 transitions, 6845 flow [2024-06-21 15:57:48,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:48,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:48,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 15:57:48,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-21 15:57:48,306 INFO L175 Difference]: Start difference. First operand has 271 places, 373 transitions, 6073 flow. Second operand 6 states and 148 transitions. [2024-06-21 15:57:48,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 391 transitions, 6845 flow [2024-06-21 15:57:49,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 391 transitions, 6802 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 15:57:49,049 INFO L231 Difference]: Finished difference. Result has 275 places, 374 transitions, 6122 flow [2024-06-21 15:57:49,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6030, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6122, PETRI_PLACES=275, PETRI_TRANSITIONS=374} [2024-06-21 15:57:49,049 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-21 15:57:49,049 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 374 transitions, 6122 flow [2024-06-21 15:57:49,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:49,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:49,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:49,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 15:57:49,050 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)] === [2024-06-21 15:57:49,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:49,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1671903398, now seen corresponding path program 3 times [2024-06-21 15:57:49,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:49,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053631813] [2024-06-21 15:57:49,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:49,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:49,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:49,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053631813] [2024-06-21 15:57:49,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053631813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:49,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:49,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:49,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168952960] [2024-06-21 15:57:49,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:49,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:49,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:49,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:49,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:49,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:57:49,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 374 transitions, 6122 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-21 15:57:49,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:49,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:57:49,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:49,730 INFO L124 PetriNetUnfolderBase]: 2097/3619 cut-off events. [2024-06-21 15:57:49,731 INFO L125 PetriNetUnfolderBase]: For 277553/277563 co-relation queries the response was YES. [2024-06-21 15:57:49,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26280 conditions, 3619 events. 2097/3619 cut-off events. For 277553/277563 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 23092 event pairs, 415 based on Foata normal form. 10/3618 useless extension candidates. Maximal degree in co-relation 26152. Up to 3087 conditions per place. [2024-06-21 15:57:49,767 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 309 selfloop transitions, 39 changer transitions 0/393 dead transitions. [2024-06-21 15:57:49,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 393 transitions, 6902 flow [2024-06-21 15:57:49,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:49,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:49,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 15:57:49,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 15:57:49,770 INFO L175 Difference]: Start difference. First operand has 275 places, 374 transitions, 6122 flow. Second operand 7 states and 168 transitions. [2024-06-21 15:57:49,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 393 transitions, 6902 flow [2024-06-21 15:57:50,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 393 transitions, 6830 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:50,467 INFO L231 Difference]: Finished difference. Result has 278 places, 375 transitions, 6150 flow [2024-06-21 15:57:50,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6050, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6150, PETRI_PLACES=278, PETRI_TRANSITIONS=375} [2024-06-21 15:57:50,468 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-21 15:57:50,468 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 375 transitions, 6150 flow [2024-06-21 15:57:50,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-21 15:57:50,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:50,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:50,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 15:57:50,469 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)] === [2024-06-21 15:57:50,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:50,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1087206, now seen corresponding path program 1 times [2024-06-21 15:57:50,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:50,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406433936] [2024-06-21 15:57:50,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:50,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:50,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:50,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406433936] [2024-06-21 15:57:50,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406433936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:50,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:50,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:50,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779423697] [2024-06-21 15:57:50,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:50,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:50,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:50,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:50,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:50,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:50,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 375 transitions, 6150 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:50,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:50,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:50,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:51,136 INFO L124 PetriNetUnfolderBase]: 2207/3734 cut-off events. [2024-06-21 15:57:51,137 INFO L125 PetriNetUnfolderBase]: For 266267/266277 co-relation queries the response was YES. [2024-06-21 15:57:51,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27106 conditions, 3734 events. 2207/3734 cut-off events. For 266267/266277 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23365 event pairs, 439 based on Foata normal form. 2/3730 useless extension candidates. Maximal degree in co-relation 26977. Up to 3351 conditions per place. [2024-06-21 15:57:51,175 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 343 selfloop transitions, 41 changer transitions 0/392 dead transitions. [2024-06-21 15:57:51,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 392 transitions, 7006 flow [2024-06-21 15:57:51,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:51,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:51,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-21 15:57:51,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-21 15:57:51,177 INFO L175 Difference]: Start difference. First operand has 278 places, 375 transitions, 6150 flow. Second operand 7 states and 162 transitions. [2024-06-21 15:57:51,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 392 transitions, 7006 flow [2024-06-21 15:57:51,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 392 transitions, 6926 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:51,903 INFO L231 Difference]: Finished difference. Result has 280 places, 377 transitions, 6207 flow [2024-06-21 15:57:51,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6070, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6207, PETRI_PLACES=280, PETRI_TRANSITIONS=377} [2024-06-21 15:57:51,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-21 15:57:51,903 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 377 transitions, 6207 flow [2024-06-21 15:57:51,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:51,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:51,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:51,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 15:57:51,904 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)] === [2024-06-21 15:57:51,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:51,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1568018906, now seen corresponding path program 4 times [2024-06-21 15:57:51,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:51,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948241886] [2024-06-21 15:57:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:51,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:51,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:51,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948241886] [2024-06-21 15:57:51,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948241886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:51,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:51,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:51,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027395948] [2024-06-21 15:57:51,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:51,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:51,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:51,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:51,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:52,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-21 15:57:52,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 377 transitions, 6207 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:52,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:52,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-21 15:57:52,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:52,558 INFO L124 PetriNetUnfolderBase]: 2082/3609 cut-off events. [2024-06-21 15:57:52,559 INFO L125 PetriNetUnfolderBase]: For 267144/267154 co-relation queries the response was YES. [2024-06-21 15:57:52,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25759 conditions, 3609 events. 2082/3609 cut-off events. For 267144/267154 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23123 event pairs, 371 based on Foata normal form. 10/3614 useless extension candidates. Maximal degree in co-relation 25629. Up to 3061 conditions per place. [2024-06-21 15:57:52,594 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 328 selfloop transitions, 27 changer transitions 0/400 dead transitions. [2024-06-21 15:57:52,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 400 transitions, 7005 flow [2024-06-21 15:57:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:52,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:52,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 15:57:52,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-21 15:57:52,595 INFO L175 Difference]: Start difference. First operand has 280 places, 377 transitions, 6207 flow. Second operand 6 states and 155 transitions. [2024-06-21 15:57:52,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 400 transitions, 7005 flow [2024-06-21 15:57:53,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 400 transitions, 6882 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:53,431 INFO L231 Difference]: Finished difference. Result has 281 places, 377 transitions, 6147 flow [2024-06-21 15:57:53,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6084, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6147, PETRI_PLACES=281, PETRI_TRANSITIONS=377} [2024-06-21 15:57:53,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-21 15:57:53,432 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 377 transitions, 6147 flow [2024-06-21 15:57:53,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:53,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:53,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:53,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 15:57:53,432 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)] === [2024-06-21 15:57:53,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:53,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1561578098, now seen corresponding path program 2 times [2024-06-21 15:57:53,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:53,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993839996] [2024-06-21 15:57:53,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:53,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:53,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:53,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:53,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993839996] [2024-06-21 15:57:53,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993839996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:53,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:53,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:53,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406535225] [2024-06-21 15:57:53,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:53,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:53,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:53,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:53,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:53,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:53,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 377 transitions, 6147 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:53,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:53,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:53,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:54,210 INFO L124 PetriNetUnfolderBase]: 2192/3720 cut-off events. [2024-06-21 15:57:54,210 INFO L125 PetriNetUnfolderBase]: For 254342/254352 co-relation queries the response was YES. [2024-06-21 15:57:54,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26483 conditions, 3720 events. 2192/3720 cut-off events. For 254342/254352 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23277 event pairs, 424 based on Foata normal form. 2/3720 useless extension candidates. Maximal degree in co-relation 26352. Up to 3350 conditions per place. [2024-06-21 15:57:54,249 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 362 selfloop transitions, 26 changer transitions 0/396 dead transitions. [2024-06-21 15:57:54,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 396 transitions, 7023 flow [2024-06-21 15:57:54,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:54,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:54,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 15:57:54,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-21 15:57:54,251 INFO L175 Difference]: Start difference. First operand has 281 places, 377 transitions, 6147 flow. Second operand 6 states and 147 transitions. [2024-06-21 15:57:54,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 396 transitions, 7023 flow [2024-06-21 15:57:55,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 396 transitions, 6957 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:55,063 INFO L231 Difference]: Finished difference. Result has 282 places, 379 transitions, 6192 flow [2024-06-21 15:57:55,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6081, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6192, PETRI_PLACES=282, PETRI_TRANSITIONS=379} [2024-06-21 15:57:55,064 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-21 15:57:55,064 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 379 transitions, 6192 flow [2024-06-21 15:57:55,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:55,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:55,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:55,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 15:57:55,064 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)] === [2024-06-21 15:57:55,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:55,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1331362178, now seen corresponding path program 3 times [2024-06-21 15:57:55,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:55,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806183321] [2024-06-21 15:57:55,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:55,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:55,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:55,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806183321] [2024-06-21 15:57:55,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806183321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:55,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:55,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:55,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001337335] [2024-06-21 15:57:55,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:55,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:55,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:55,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:55,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:55,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:55,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 379 transitions, 6192 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:55,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:55,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:55,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:55,761 INFO L124 PetriNetUnfolderBase]: 2220/3771 cut-off events. [2024-06-21 15:57:55,762 INFO L125 PetriNetUnfolderBase]: For 269873/269883 co-relation queries the response was YES. [2024-06-21 15:57:55,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27057 conditions, 3771 events. 2220/3771 cut-off events. For 269873/269883 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 23650 event pairs, 398 based on Foata normal form. 2/3771 useless extension candidates. Maximal degree in co-relation 26925. Up to 3279 conditions per place. [2024-06-21 15:57:55,802 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 367 selfloop transitions, 30 changer transitions 0/405 dead transitions. [2024-06-21 15:57:55,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 405 transitions, 7292 flow [2024-06-21 15:57:55,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:55,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:55,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 15:57:55,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 15:57:55,804 INFO L175 Difference]: Start difference. First operand has 282 places, 379 transitions, 6192 flow. Second operand 6 states and 153 transitions. [2024-06-21 15:57:55,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 405 transitions, 7292 flow [2024-06-21 15:57:56,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 405 transitions, 7197 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:56,506 INFO L231 Difference]: Finished difference. Result has 284 places, 382 transitions, 6236 flow [2024-06-21 15:57:56,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6097, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6236, PETRI_PLACES=284, PETRI_TRANSITIONS=382} [2024-06-21 15:57:56,506 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-21 15:57:56,507 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 382 transitions, 6236 flow [2024-06-21 15:57:56,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:56,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:56,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:56,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 15:57:56,507 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)] === [2024-06-21 15:57:56,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:56,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1597816188, now seen corresponding path program 1 times [2024-06-21 15:57:56,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:56,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931051662] [2024-06-21 15:57:56,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:56,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:56,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:56,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931051662] [2024-06-21 15:57:56,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931051662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:56,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:56,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:56,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079934115] [2024-06-21 15:57:56,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:56,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:56,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:56,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:56,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:56,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:56,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 382 transitions, 6236 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:56,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:56,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:56,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:57,237 INFO L124 PetriNetUnfolderBase]: 2233/3785 cut-off events. [2024-06-21 15:57:57,237 INFO L125 PetriNetUnfolderBase]: For 276258/276258 co-relation queries the response was YES. [2024-06-21 15:57:57,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27385 conditions, 3785 events. 2233/3785 cut-off events. For 276258/276258 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23713 event pairs, 416 based on Foata normal form. 1/3784 useless extension candidates. Maximal degree in co-relation 27252. Up to 3326 conditions per place. [2024-06-21 15:57:57,272 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 360 selfloop transitions, 54 changer transitions 0/422 dead transitions. [2024-06-21 15:57:57,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 422 transitions, 7426 flow [2024-06-21 15:57:57,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:57,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 15:57:57,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-21 15:57:57,273 INFO L175 Difference]: Start difference. First operand has 284 places, 382 transitions, 6236 flow. Second operand 8 states and 197 transitions. [2024-06-21 15:57:57,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 422 transitions, 7426 flow [2024-06-21 15:57:58,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 422 transitions, 7352 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-21 15:57:58,259 INFO L231 Difference]: Finished difference. Result has 291 places, 388 transitions, 6405 flow [2024-06-21 15:57:58,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6162, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6405, PETRI_PLACES=291, PETRI_TRANSITIONS=388} [2024-06-21 15:57:58,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-21 15:57:58,260 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 388 transitions, 6405 flow [2024-06-21 15:57:58,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:58,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:58,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:58,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 15:57:58,260 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)] === [2024-06-21 15:57:58,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:58,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1592752892, now seen corresponding path program 2 times [2024-06-21 15:57:58,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:58,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751405986] [2024-06-21 15:57:58,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:58,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:58,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:58,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751405986] [2024-06-21 15:57:58,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751405986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:58,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:58,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:58,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373942060] [2024-06-21 15:57:58,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:58,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:58,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:58,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:58,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:58,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:58,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 388 transitions, 6405 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:58,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:58,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:58,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:58,931 INFO L124 PetriNetUnfolderBase]: 2246/3802 cut-off events. [2024-06-21 15:57:58,932 INFO L125 PetriNetUnfolderBase]: For 291080/291096 co-relation queries the response was YES. [2024-06-21 15:57:58,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28270 conditions, 3802 events. 2246/3802 cut-off events. For 291080/291096 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 23839 event pairs, 436 based on Foata normal form. 2/3798 useless extension candidates. Maximal degree in co-relation 28134. Up to 3007 conditions per place. [2024-06-21 15:57:58,972 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 273 selfloop transitions, 142 changer transitions 0/423 dead transitions. [2024-06-21 15:57:58,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 423 transitions, 7833 flow [2024-06-21 15:57:58,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:58,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:58,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 15:57:58,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 15:57:58,973 INFO L175 Difference]: Start difference. First operand has 291 places, 388 transitions, 6405 flow. Second operand 7 states and 178 transitions. [2024-06-21 15:57:58,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 423 transitions, 7833 flow [2024-06-21 15:57:59,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 423 transitions, 7733 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:59,657 INFO L231 Difference]: Finished difference. Result has 297 places, 397 transitions, 6909 flow [2024-06-21 15:57:59,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6305, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6909, PETRI_PLACES=297, PETRI_TRANSITIONS=397} [2024-06-21 15:57:59,658 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-21 15:57:59,658 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 397 transitions, 6909 flow [2024-06-21 15:57:59,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:59,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:59,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:59,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 15:57:59,658 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)] === [2024-06-21 15:57:59,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:59,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1628761908, now seen corresponding path program 3 times [2024-06-21 15:57:59,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:59,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801494625] [2024-06-21 15:57:59,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:59,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:59,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:59,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801494625] [2024-06-21 15:57:59,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801494625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:59,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:59,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:59,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683421251] [2024-06-21 15:57:59,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:59,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:59,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:59,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:59,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:59,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:57:59,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 397 transitions, 6909 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:59,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:59,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:57:59,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:00,368 INFO L124 PetriNetUnfolderBase]: 2251/3809 cut-off events. [2024-06-21 15:58:00,368 INFO L125 PetriNetUnfolderBase]: For 303706/303722 co-relation queries the response was YES. [2024-06-21 15:58:00,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29532 conditions, 3809 events. 2251/3809 cut-off events. For 303706/303722 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 23844 event pairs, 436 based on Foata normal form. 2/3805 useless extension candidates. Maximal degree in co-relation 29392. Up to 3011 conditions per place. [2024-06-21 15:58:00,410 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 270 selfloop transitions, 145 changer transitions 0/423 dead transitions. [2024-06-21 15:58:00,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 423 transitions, 8231 flow [2024-06-21 15:58:00,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:00,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:00,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 15:58:00,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:58:00,411 INFO L175 Difference]: Start difference. First operand has 297 places, 397 transitions, 6909 flow. Second operand 7 states and 175 transitions. [2024-06-21 15:58:00,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 423 transitions, 8231 flow [2024-06-21 15:58:01,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 423 transitions, 8055 flow, removed 62 selfloop flow, removed 2 redundant places. [2024-06-21 15:58:01,334 INFO L231 Difference]: Finished difference. Result has 302 places, 400 transitions, 7109 flow [2024-06-21 15:58:01,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6759, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7109, PETRI_PLACES=302, PETRI_TRANSITIONS=400} [2024-06-21 15:58:01,334 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-21 15:58:01,334 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 400 transitions, 7109 flow [2024-06-21 15:58:01,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:01,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:01,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:01,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 15:58:01,335 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)] === [2024-06-21 15:58:01,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:01,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1470095564, now seen corresponding path program 4 times [2024-06-21 15:58:01,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:01,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296389144] [2024-06-21 15:58:01,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:01,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:01,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:01,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:01,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296389144] [2024-06-21 15:58:01,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296389144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:01,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:01,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:01,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296147184] [2024-06-21 15:58:01,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:01,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:01,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:01,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:01,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:01,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:01,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 400 transitions, 7109 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:01,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:01,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:01,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:02,097 INFO L124 PetriNetUnfolderBase]: 2264/3836 cut-off events. [2024-06-21 15:58:02,098 INFO L125 PetriNetUnfolderBase]: For 309801/309803 co-relation queries the response was YES. [2024-06-21 15:58:02,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29819 conditions, 3836 events. 2264/3836 cut-off events. For 309801/309803 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 24089 event pairs, 417 based on Foata normal form. 1/3835 useless extension candidates. Maximal degree in co-relation 29677. Up to 3413 conditions per place. [2024-06-21 15:58:02,144 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 376 selfloop transitions, 41 changer transitions 0/425 dead transitions. [2024-06-21 15:58:02,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 425 transitions, 8266 flow [2024-06-21 15:58:02,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:02,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:02,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 15:58:02,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-21 15:58:02,145 INFO L175 Difference]: Start difference. First operand has 302 places, 400 transitions, 7109 flow. Second operand 8 states and 186 transitions. [2024-06-21 15:58:02,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 425 transitions, 8266 flow [2024-06-21 15:58:03,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 425 transitions, 7968 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:03,291 INFO L231 Difference]: Finished difference. Result has 307 places, 406 transitions, 7037 flow [2024-06-21 15:58:03,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6820, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7037, PETRI_PLACES=307, PETRI_TRANSITIONS=406} [2024-06-21 15:58:03,292 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-21 15:58:03,292 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 406 transitions, 7037 flow [2024-06-21 15:58:03,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:03,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:03,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:03,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 15:58:03,293 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)] === [2024-06-21 15:58:03,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:03,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1420350209, now seen corresponding path program 1 times [2024-06-21 15:58:03,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:03,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79811942] [2024-06-21 15:58:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:03,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:03,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:03,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79811942] [2024-06-21 15:58:03,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79811942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:03,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:03,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:03,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808491374] [2024-06-21 15:58:03,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:03,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:03,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:03,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:03,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:03,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:03,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 406 transitions, 7037 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:03,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:03,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:03,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:04,009 INFO L124 PetriNetUnfolderBase]: 2293/3889 cut-off events. [2024-06-21 15:58:04,009 INFO L125 PetriNetUnfolderBase]: For 327556/327562 co-relation queries the response was YES. [2024-06-21 15:58:04,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30201 conditions, 3889 events. 2293/3889 cut-off events. For 327556/327562 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 24525 event pairs, 448 based on Foata normal form. 2/3887 useless extension candidates. Maximal degree in co-relation 30057. Up to 3220 conditions per place. [2024-06-21 15:58:04,053 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 287 selfloop transitions, 147 changer transitions 0/442 dead transitions. [2024-06-21 15:58:04,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 442 transitions, 8501 flow [2024-06-21 15:58:04,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:04,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:04,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 15:58:04,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:58:04,054 INFO L175 Difference]: Start difference. First operand has 307 places, 406 transitions, 7037 flow. Second operand 7 states and 175 transitions. [2024-06-21 15:58:04,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 442 transitions, 8501 flow [2024-06-21 15:58:05,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 442 transitions, 8384 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:05,310 INFO L231 Difference]: Finished difference. Result has 309 places, 418 transitions, 7430 flow [2024-06-21 15:58:05,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6920, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7430, PETRI_PLACES=309, PETRI_TRANSITIONS=418} [2024-06-21 15:58:05,311 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-21 15:58:05,311 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 418 transitions, 7430 flow [2024-06-21 15:58:05,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:05,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:05,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:05,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 15:58:05,312 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)] === [2024-06-21 15:58:05,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:05,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1628769007, now seen corresponding path program 2 times [2024-06-21 15:58:05,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:05,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781286503] [2024-06-21 15:58:05,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:05,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:05,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:05,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:05,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781286503] [2024-06-21 15:58:05,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781286503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:05,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:05,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:05,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167058228] [2024-06-21 15:58:05,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:05,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:05,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:05,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:05,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:05,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:05,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 418 transitions, 7430 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:05,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:05,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:05,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:06,094 INFO L124 PetriNetUnfolderBase]: 2306/3904 cut-off events. [2024-06-21 15:58:06,094 INFO L125 PetriNetUnfolderBase]: For 339236/339244 co-relation queries the response was YES. [2024-06-21 15:58:06,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30773 conditions, 3904 events. 2306/3904 cut-off events. For 339236/339244 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24630 event pairs, 445 based on Foata normal form. 2/3901 useless extension candidates. Maximal degree in co-relation 30628. Up to 3235 conditions per place. [2024-06-21 15:58:06,140 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 293 selfloop transitions, 148 changer transitions 0/449 dead transitions. [2024-06-21 15:58:06,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 449 transitions, 8818 flow [2024-06-21 15:58:06,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:06,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:06,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 15:58:06,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-21 15:58:06,141 INFO L175 Difference]: Start difference. First operand has 309 places, 418 transitions, 7430 flow. Second operand 8 states and 196 transitions. [2024-06-21 15:58:06,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 449 transitions, 8818 flow [2024-06-21 15:58:07,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 449 transitions, 8628 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-21 15:58:07,292 INFO L231 Difference]: Finished difference. Result has 314 places, 424 transitions, 7656 flow [2024-06-21 15:58:07,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7250, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7656, PETRI_PLACES=314, PETRI_TRANSITIONS=424} [2024-06-21 15:58:07,293 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-21 15:58:07,293 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 424 transitions, 7656 flow [2024-06-21 15:58:07,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:07,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:07,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:07,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 15:58:07,294 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)] === [2024-06-21 15:58:07,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:07,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1932936101, now seen corresponding path program 3 times [2024-06-21 15:58:07,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:07,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106867633] [2024-06-21 15:58:07,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:07,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:07,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:07,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:07,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106867633] [2024-06-21 15:58:07,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106867633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:07,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:07,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:07,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120428658] [2024-06-21 15:58:07,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:07,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:07,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:07,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:07,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:07,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:07,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 424 transitions, 7656 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:07,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:07,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:07,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:08,109 INFO L124 PetriNetUnfolderBase]: 2303/3904 cut-off events. [2024-06-21 15:58:08,109 INFO L125 PetriNetUnfolderBase]: For 345699/345707 co-relation queries the response was YES. [2024-06-21 15:58:08,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30807 conditions, 3904 events. 2303/3904 cut-off events. For 345699/345707 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24620 event pairs, 447 based on Foata normal form. 2/3901 useless extension candidates. Maximal degree in co-relation 30661. Up to 3232 conditions per place. [2024-06-21 15:58:08,153 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 293 selfloop transitions, 149 changer transitions 0/450 dead transitions. [2024-06-21 15:58:08,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 450 transitions, 8780 flow [2024-06-21 15:58:08,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:58:08,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:58:08,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-21 15:58:08,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-21 15:58:08,155 INFO L175 Difference]: Start difference. First operand has 314 places, 424 transitions, 7656 flow. Second operand 10 states and 231 transitions. [2024-06-21 15:58:08,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 450 transitions, 8780 flow [2024-06-21 15:58:09,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 450 transitions, 8434 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:09,217 INFO L231 Difference]: Finished difference. Result has 319 places, 424 transitions, 7614 flow [2024-06-21 15:58:09,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7310, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7614, PETRI_PLACES=319, PETRI_TRANSITIONS=424} [2024-06-21 15:58:09,218 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-21 15:58:09,218 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 424 transitions, 7614 flow [2024-06-21 15:58:09,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:09,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:09,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:09,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 15:58:09,219 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)] === [2024-06-21 15:58:09,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:09,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1181182863, now seen corresponding path program 4 times [2024-06-21 15:58:09,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:09,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33269308] [2024-06-21 15:58:09,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:09,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:09,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:09,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33269308] [2024-06-21 15:58:09,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33269308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:09,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:09,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:09,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448369530] [2024-06-21 15:58:09,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:09,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:09,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:09,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:09,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:09,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:09,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 424 transitions, 7614 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:09,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:09,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:09,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:10,022 INFO L124 PetriNetUnfolderBase]: 2313/3924 cut-off events. [2024-06-21 15:58:10,023 INFO L125 PetriNetUnfolderBase]: For 353441/353443 co-relation queries the response was YES. [2024-06-21 15:58:10,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30980 conditions, 3924 events. 2313/3924 cut-off events. For 353441/353443 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24793 event pairs, 419 based on Foata normal form. 2/3924 useless extension candidates. Maximal degree in co-relation 30833. Up to 3435 conditions per place. [2024-06-21 15:58:10,063 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 372 selfloop transitions, 71 changer transitions 0/451 dead transitions. [2024-06-21 15:58:10,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 451 transitions, 8870 flow [2024-06-21 15:58:10,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:10,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:10,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 15:58:10,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 15:58:10,065 INFO L175 Difference]: Start difference. First operand has 319 places, 424 transitions, 7614 flow. Second operand 8 states and 192 transitions. [2024-06-21 15:58:10,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 451 transitions, 8870 flow [2024-06-21 15:58:11,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 451 transitions, 8663 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 15:58:11,236 INFO L231 Difference]: Finished difference. Result has 319 places, 430 transitions, 7667 flow [2024-06-21 15:58:11,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7412, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7667, PETRI_PLACES=319, PETRI_TRANSITIONS=430} [2024-06-21 15:58:11,237 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-21 15:58:11,237 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 430 transitions, 7667 flow [2024-06-21 15:58:11,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:11,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:11,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:11,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 15:58:11,238 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)] === [2024-06-21 15:58:11,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:11,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1470082885, now seen corresponding path program 5 times [2024-06-21 15:58:11,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:11,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858234533] [2024-06-21 15:58:11,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:11,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:11,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:11,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858234533] [2024-06-21 15:58:11,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858234533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:11,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:11,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:11,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599432347] [2024-06-21 15:58:11,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:11,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:11,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:11,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:11,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:11,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:11,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 430 transitions, 7667 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:11,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:11,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:11,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:12,030 INFO L124 PetriNetUnfolderBase]: 2307/3916 cut-off events. [2024-06-21 15:58:12,030 INFO L125 PetriNetUnfolderBase]: For 354846/354848 co-relation queries the response was YES. [2024-06-21 15:58:12,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30701 conditions, 3916 events. 2307/3916 cut-off events. For 354846/354848 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24745 event pairs, 419 based on Foata normal form. 2/3916 useless extension candidates. Maximal degree in co-relation 30553. Up to 3429 conditions per place. [2024-06-21 15:58:12,075 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 370 selfloop transitions, 73 changer transitions 0/451 dead transitions. [2024-06-21 15:58:12,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 451 transitions, 8655 flow [2024-06-21 15:58:12,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:58:12,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:58:12,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-21 15:58:12,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-21 15:58:12,076 INFO L175 Difference]: Start difference. First operand has 319 places, 430 transitions, 7667 flow. Second operand 9 states and 210 transitions. [2024-06-21 15:58:12,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 451 transitions, 8655 flow [2024-06-21 15:58:13,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 451 transitions, 8493 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:13,584 INFO L231 Difference]: Finished difference. Result has 322 places, 430 transitions, 7663 flow [2024-06-21 15:58:13,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7505, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7663, PETRI_PLACES=322, PETRI_TRANSITIONS=430} [2024-06-21 15:58:13,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-21 15:58:13,585 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 430 transitions, 7663 flow [2024-06-21 15:58:13,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:13,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:13,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:13,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 15:58:13,585 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)] === [2024-06-21 15:58:13,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:13,586 INFO L85 PathProgramCache]: Analyzing trace with hash 996482768, now seen corresponding path program 5 times [2024-06-21 15:58:13,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:13,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521315388] [2024-06-21 15:58:13,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:13,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:13,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:13,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521315388] [2024-06-21 15:58:13,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521315388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:13,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:13,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:13,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675555585] [2024-06-21 15:58:13,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:13,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:13,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:13,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:13,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:13,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:13,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 430 transitions, 7663 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:13,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:13,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:13,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:14,389 INFO L124 PetriNetUnfolderBase]: 2312/3901 cut-off events. [2024-06-21 15:58:14,389 INFO L125 PetriNetUnfolderBase]: For 363483/363483 co-relation queries the response was YES. [2024-06-21 15:58:14,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30860 conditions, 3901 events. 2312/3901 cut-off events. For 363483/363483 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24530 event pairs, 479 based on Foata normal form. 1/3861 useless extension candidates. Maximal degree in co-relation 30711. Up to 3088 conditions per place. [2024-06-21 15:58:14,428 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 289 selfloop transitions, 163 changer transitions 0/460 dead transitions. [2024-06-21 15:58:14,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 460 transitions, 9303 flow [2024-06-21 15:58:14,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:14,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:14,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 15:58:14,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:58:14,429 INFO L175 Difference]: Start difference. First operand has 322 places, 430 transitions, 7663 flow. Second operand 7 states and 175 transitions. [2024-06-21 15:58:14,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 460 transitions, 9303 flow [2024-06-21 15:58:15,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 460 transitions, 9127 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 15:58:15,692 INFO L231 Difference]: Finished difference. Result has 320 places, 436 transitions, 7990 flow [2024-06-21 15:58:15,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7487, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7990, PETRI_PLACES=320, PETRI_TRANSITIONS=436} [2024-06-21 15:58:15,693 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-21 15:58:15,693 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 436 transitions, 7990 flow [2024-06-21 15:58:15,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:15,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:15,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:15,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 15:58:15,694 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)] === [2024-06-21 15:58:15,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:15,694 INFO L85 PathProgramCache]: Analyzing trace with hash -941709516, now seen corresponding path program 6 times [2024-06-21 15:58:15,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:15,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413338942] [2024-06-21 15:58:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:15,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:15,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:15,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:15,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413338942] [2024-06-21 15:58:15,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413338942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:15,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:15,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:15,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614075935] [2024-06-21 15:58:15,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:15,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:15,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:15,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:15,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:15,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:15,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 436 transitions, 7990 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:15,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:15,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:15,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:16,442 INFO L124 PetriNetUnfolderBase]: 2317/3906 cut-off events. [2024-06-21 15:58:16,442 INFO L125 PetriNetUnfolderBase]: For 374331/374331 co-relation queries the response was YES. [2024-06-21 15:58:16,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31385 conditions, 3906 events. 2317/3906 cut-off events. For 374331/374331 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24566 event pairs, 477 based on Foata normal form. 1/3866 useless extension candidates. Maximal degree in co-relation 31235. Up to 3092 conditions per place. [2024-06-21 15:58:16,486 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 288 selfloop transitions, 164 changer transitions 0/460 dead transitions. [2024-06-21 15:58:16,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 460 transitions, 9546 flow [2024-06-21 15:58:16,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:16,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:16,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 15:58:16,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-21 15:58:16,487 INFO L175 Difference]: Start difference. First operand has 320 places, 436 transitions, 7990 flow. Second operand 7 states and 173 transitions. [2024-06-21 15:58:16,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 460 transitions, 9546 flow [2024-06-21 15:58:17,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 460 transitions, 9319 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-21 15:58:17,589 INFO L231 Difference]: Finished difference. Result has 324 places, 439 transitions, 8187 flow [2024-06-21 15:58:17,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7795, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8187, PETRI_PLACES=324, PETRI_TRANSITIONS=439} [2024-06-21 15:58:17,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-21 15:58:17,590 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 439 transitions, 8187 flow [2024-06-21 15:58:17,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:17,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:17,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:17,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 15:58:17,591 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)] === [2024-06-21 15:58:17,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:17,591 INFO L85 PathProgramCache]: Analyzing trace with hash -597623466, now seen corresponding path program 7 times [2024-06-21 15:58:17,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:17,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680065790] [2024-06-21 15:58:17,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:17,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:17,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:17,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680065790] [2024-06-21 15:58:17,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680065790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:17,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:17,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:17,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746794955] [2024-06-21 15:58:17,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:17,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:17,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:17,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:17,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:17,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:17,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 439 transitions, 8187 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:17,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:17,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:17,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:18,335 INFO L124 PetriNetUnfolderBase]: 2322/3915 cut-off events. [2024-06-21 15:58:18,336 INFO L125 PetriNetUnfolderBase]: For 383421/383421 co-relation queries the response was YES. [2024-06-21 15:58:18,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31767 conditions, 3915 events. 2322/3915 cut-off events. For 383421/383421 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24694 event pairs, 477 based on Foata normal form. 1/3875 useless extension candidates. Maximal degree in co-relation 31615. Up to 3096 conditions per place. [2024-06-21 15:58:18,382 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 279 selfloop transitions, 172 changer transitions 0/459 dead transitions. [2024-06-21 15:58:18,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 459 transitions, 9539 flow [2024-06-21 15:58:18,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:18,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:18,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 15:58:18,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 15:58:18,383 INFO L175 Difference]: Start difference. First operand has 324 places, 439 transitions, 8187 flow. Second operand 7 states and 168 transitions. [2024-06-21 15:58:18,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 459 transitions, 9539 flow [2024-06-21 15:58:19,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 459 transitions, 9192 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:19,707 INFO L231 Difference]: Finished difference. Result has 327 places, 442 transitions, 8254 flow [2024-06-21 15:58:19,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7843, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8254, PETRI_PLACES=327, PETRI_TRANSITIONS=442} [2024-06-21 15:58:19,708 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-21 15:58:19,708 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 442 transitions, 8254 flow [2024-06-21 15:58:19,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:19,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:19,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:19,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 15:58:19,708 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)] === [2024-06-21 15:58:19,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:19,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1205570640, now seen corresponding path program 8 times [2024-06-21 15:58:19,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:19,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389494086] [2024-06-21 15:58:19,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:19,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:19,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:19,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:19,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389494086] [2024-06-21 15:58:19,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389494086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:19,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:19,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:19,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395491180] [2024-06-21 15:58:19,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:19,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:19,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:19,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:19,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:19,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:19,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 442 transitions, 8254 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:19,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:19,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:19,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:20,489 INFO L124 PetriNetUnfolderBase]: 2327/3940 cut-off events. [2024-06-21 15:58:20,489 INFO L125 PetriNetUnfolderBase]: For 388740/388740 co-relation queries the response was YES. [2024-06-21 15:58:20,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31940 conditions, 3940 events. 2327/3940 cut-off events. For 388740/388740 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 24939 event pairs, 426 based on Foata normal form. 1/3928 useless extension candidates. Maximal degree in co-relation 31787. Up to 3234 conditions per place. [2024-06-21 15:58:20,534 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 316 selfloop transitions, 148 changer transitions 0/472 dead transitions. [2024-06-21 15:58:20,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 472 transitions, 9679 flow [2024-06-21 15:58:20,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:20,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:20,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 15:58:20,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-21 15:58:20,535 INFO L175 Difference]: Start difference. First operand has 327 places, 442 transitions, 8254 flow. Second operand 7 states and 179 transitions. [2024-06-21 15:58:20,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 472 transitions, 9679 flow [2024-06-21 15:58:22,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 472 transitions, 9316 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:22,057 INFO L231 Difference]: Finished difference. Result has 331 places, 445 transitions, 8368 flow [2024-06-21 15:58:22,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7897, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8368, PETRI_PLACES=331, PETRI_TRANSITIONS=445} [2024-06-21 15:58:22,057 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-21 15:58:22,057 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 445 transitions, 8368 flow [2024-06-21 15:58:22,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:22,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:22,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:22,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 15:58:22,058 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)] === [2024-06-21 15:58:22,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:22,058 INFO L85 PathProgramCache]: Analyzing trace with hash 811144534, now seen corresponding path program 9 times [2024-06-21 15:58:22,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:22,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309735045] [2024-06-21 15:58:22,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:22,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:22,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:22,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:22,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309735045] [2024-06-21 15:58:22,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309735045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:22,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:22,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:22,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736731459] [2024-06-21 15:58:22,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:22,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:22,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:22,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:22,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:22,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:22,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 445 transitions, 8368 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:22,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:22,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:22,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:22,865 INFO L124 PetriNetUnfolderBase]: 2324/3948 cut-off events. [2024-06-21 15:58:22,866 INFO L125 PetriNetUnfolderBase]: For 392004/392006 co-relation queries the response was YES. [2024-06-21 15:58:22,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32086 conditions, 3948 events. 2324/3948 cut-off events. For 392004/392006 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 25030 event pairs, 416 based on Foata normal form. 1/3947 useless extension candidates. Maximal degree in co-relation 31931. Up to 3232 conditions per place. [2024-06-21 15:58:22,913 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 324 selfloop transitions, 145 changer transitions 0/477 dead transitions. [2024-06-21 15:58:22,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 477 transitions, 9582 flow [2024-06-21 15:58:22,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:22,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:22,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 15:58:22,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-21 15:58:22,914 INFO L175 Difference]: Start difference. First operand has 331 places, 445 transitions, 8368 flow. Second operand 8 states and 203 transitions. [2024-06-21 15:58:22,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 477 transitions, 9582 flow [2024-06-21 15:58:24,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 477 transitions, 9248 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 15:58:24,554 INFO L231 Difference]: Finished difference. Result has 332 places, 445 transitions, 8342 flow [2024-06-21 15:58:24,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8034, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8342, PETRI_PLACES=332, PETRI_TRANSITIONS=445} [2024-06-21 15:58:24,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-21 15:58:24,555 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 445 transitions, 8342 flow [2024-06-21 15:58:24,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:24,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:24,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:24,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 15:58:24,556 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)] === [2024-06-21 15:58:24,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:24,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1006965387, now seen corresponding path program 6 times [2024-06-21 15:58:24,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:24,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254315654] [2024-06-21 15:58:24,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:24,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:24,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:24,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:24,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254315654] [2024-06-21 15:58:24,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254315654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:24,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:24,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:24,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008598726] [2024-06-21 15:58:24,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:24,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:24,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:24,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:24,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:24,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:24,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 445 transitions, 8342 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:24,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:24,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:24,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:25,372 INFO L124 PetriNetUnfolderBase]: 2337/3956 cut-off events. [2024-06-21 15:58:25,373 INFO L125 PetriNetUnfolderBase]: For 409046/409046 co-relation queries the response was YES. [2024-06-21 15:58:25,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32403 conditions, 3956 events. 2337/3956 cut-off events. For 409046/409046 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 25032 event pairs, 475 based on Foata normal form. 1/3937 useless extension candidates. Maximal degree in co-relation 32247. Up to 3277 conditions per place. [2024-06-21 15:58:25,417 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 301 selfloop transitions, 165 changer transitions 0/474 dead transitions. [2024-06-21 15:58:25,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 474 transitions, 9808 flow [2024-06-21 15:58:25,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:25,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:25,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 15:58:25,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 15:58:25,419 INFO L175 Difference]: Start difference. First operand has 332 places, 445 transitions, 8342 flow. Second operand 8 states and 192 transitions. [2024-06-21 15:58:25,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 474 transitions, 9808 flow [2024-06-21 15:58:26,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 474 transitions, 9565 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 15:58:26,786 INFO L231 Difference]: Finished difference. Result has 333 places, 451 transitions, 8549 flow [2024-06-21 15:58:26,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8103, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8549, PETRI_PLACES=333, PETRI_TRANSITIONS=451} [2024-06-21 15:58:26,786 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-21 15:58:26,787 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 451 transitions, 8549 flow [2024-06-21 15:58:26,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:26,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:26,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:26,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 15:58:26,787 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)] === [2024-06-21 15:58:26,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:26,787 INFO L85 PathProgramCache]: Analyzing trace with hash -941696837, now seen corresponding path program 7 times [2024-06-21 15:58:26,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:26,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879283726] [2024-06-21 15:58:26,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:26,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:26,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:26,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879283726] [2024-06-21 15:58:26,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879283726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:26,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:26,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:26,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217479804] [2024-06-21 15:58:26,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:26,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:26,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:26,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:26,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:26,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:26,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 451 transitions, 8549 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:26,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:26,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:26,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:27,645 INFO L124 PetriNetUnfolderBase]: 2334/3951 cut-off events. [2024-06-21 15:58:27,645 INFO L125 PetriNetUnfolderBase]: For 406309/406309 co-relation queries the response was YES. [2024-06-21 15:58:27,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32298 conditions, 3951 events. 2334/3951 cut-off events. For 406309/406309 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 24988 event pairs, 475 based on Foata normal form. 1/3933 useless extension candidates. Maximal degree in co-relation 32141. Up to 3274 conditions per place. [2024-06-21 15:58:27,690 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 301 selfloop transitions, 166 changer transitions 0/475 dead transitions. [2024-06-21 15:58:27,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 475 transitions, 9735 flow [2024-06-21 15:58:27,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:58:27,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:58:27,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-21 15:58:27,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5536585365853659 [2024-06-21 15:58:27,691 INFO L175 Difference]: Start difference. First operand has 333 places, 451 transitions, 8549 flow. Second operand 10 states and 227 transitions. [2024-06-21 15:58:27,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 475 transitions, 9735 flow [2024-06-21 15:58:29,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 475 transitions, 9355 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:29,573 INFO L231 Difference]: Finished difference. Result has 338 places, 451 transitions, 8507 flow [2024-06-21 15:58:29,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8169, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8507, PETRI_PLACES=338, PETRI_TRANSITIONS=451} [2024-06-21 15:58:29,574 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-21 15:58:29,574 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 451 transitions, 8507 flow [2024-06-21 15:58:29,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:29,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:29,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:29,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 15:58:29,575 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)] === [2024-06-21 15:58:29,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:29,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1556279665, now seen corresponding path program 8 times [2024-06-21 15:58:29,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:29,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498708955] [2024-06-21 15:58:29,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:29,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:29,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:29,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498708955] [2024-06-21 15:58:29,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498708955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:29,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:29,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:29,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215754739] [2024-06-21 15:58:29,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:29,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:29,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:29,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:29,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:29,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:29,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 451 transitions, 8507 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:29,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:29,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:29,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:30,418 INFO L124 PetriNetUnfolderBase]: 2339/3974 cut-off events. [2024-06-21 15:58:30,418 INFO L125 PetriNetUnfolderBase]: For 416345/416351 co-relation queries the response was YES. [2024-06-21 15:58:30,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32430 conditions, 3974 events. 2339/3974 cut-off events. For 416345/416351 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 25291 event pairs, 471 based on Foata normal form. 5/3969 useless extension candidates. Maximal degree in co-relation 32272. Up to 3280 conditions per place. [2024-06-21 15:58:30,464 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 307 selfloop transitions, 162 changer transitions 0/477 dead transitions. [2024-06-21 15:58:30,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 477 transitions, 9959 flow [2024-06-21 15:58:30,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:30,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:30,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 15:58:30,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-21 15:58:30,465 INFO L175 Difference]: Start difference. First operand has 338 places, 451 transitions, 8507 flow. Second operand 7 states and 171 transitions. [2024-06-21 15:58:30,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 477 transitions, 9959 flow [2024-06-21 15:58:32,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 477 transitions, 9732 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 15:58:32,032 INFO L231 Difference]: Finished difference. Result has 338 places, 455 transitions, 8698 flow [2024-06-21 15:58:32,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8284, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8698, PETRI_PLACES=338, PETRI_TRANSITIONS=455} [2024-06-21 15:58:32,034 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-21 15:58:32,034 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 455 transitions, 8698 flow [2024-06-21 15:58:32,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:32,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:32,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:32,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 15:58:32,035 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)] === [2024-06-21 15:58:32,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:32,035 INFO L85 PathProgramCache]: Analyzing trace with hash -525160205, now seen corresponding path program 9 times [2024-06-21 15:58:32,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:32,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556126823] [2024-06-21 15:58:32,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:32,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:32,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:32,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556126823] [2024-06-21 15:58:32,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556126823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:32,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:32,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:32,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836973111] [2024-06-21 15:58:32,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:32,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:32,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:32,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:32,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:32,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:32,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 455 transitions, 8698 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:32,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:32,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:32,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:32,827 INFO L124 PetriNetUnfolderBase]: 2352/3992 cut-off events. [2024-06-21 15:58:32,827 INFO L125 PetriNetUnfolderBase]: For 431261/431267 co-relation queries the response was YES. [2024-06-21 15:58:32,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32817 conditions, 3992 events. 2352/3992 cut-off events. For 431261/431267 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 25388 event pairs, 469 based on Foata normal form. 5/3987 useless extension candidates. Maximal degree in co-relation 32657. Up to 3295 conditions per place. [2024-06-21 15:58:32,876 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 305 selfloop transitions, 167 changer transitions 0/480 dead transitions. [2024-06-21 15:58:32,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 480 transitions, 10192 flow [2024-06-21 15:58:32,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:32,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:32,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 15:58:32,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-21 15:58:32,887 INFO L175 Difference]: Start difference. First operand has 338 places, 455 transitions, 8698 flow. Second operand 7 states and 169 transitions. [2024-06-21 15:58:32,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 480 transitions, 10192 flow [2024-06-21 15:58:34,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 480 transitions, 9918 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-21 15:58:34,345 INFO L231 Difference]: Finished difference. Result has 343 places, 461 transitions, 8896 flow [2024-06-21 15:58:34,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8434, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8896, PETRI_PLACES=343, PETRI_TRANSITIONS=461} [2024-06-21 15:58:34,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-21 15:58:34,345 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 461 transitions, 8896 flow [2024-06-21 15:58:34,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:34,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:34,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:34,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 15:58:34,346 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)] === [2024-06-21 15:58:34,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:34,346 INFO L85 PathProgramCache]: Analyzing trace with hash -551457397, now seen corresponding path program 10 times [2024-06-21 15:58:34,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:34,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367753737] [2024-06-21 15:58:34,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:34,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:34,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:34,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367753737] [2024-06-21 15:58:34,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367753737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:34,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:34,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:34,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139073746] [2024-06-21 15:58:34,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:34,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:34,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:34,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:34,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:34,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:34,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 461 transitions, 8896 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:34,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:34,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:34,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:35,165 INFO L124 PetriNetUnfolderBase]: 2349/3996 cut-off events. [2024-06-21 15:58:35,165 INFO L125 PetriNetUnfolderBase]: For 435207/435223 co-relation queries the response was YES. [2024-06-21 15:58:35,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32755 conditions, 3996 events. 2349/3996 cut-off events. For 435207/435223 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 25488 event pairs, 444 based on Foata normal form. 5/3998 useless extension candidates. Maximal degree in co-relation 32593. Up to 3557 conditions per place. [2024-06-21 15:58:35,212 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 428 selfloop transitions, 39 changer transitions 0/475 dead transitions. [2024-06-21 15:58:35,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 475 transitions, 9870 flow [2024-06-21 15:58:35,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:35,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:35,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-21 15:58:35,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-21 15:58:35,214 INFO L175 Difference]: Start difference. First operand has 343 places, 461 transitions, 8896 flow. Second operand 7 states and 162 transitions. [2024-06-21 15:58:35,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 475 transitions, 9870 flow [2024-06-21 15:58:37,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 475 transitions, 9594 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 15:58:37,277 INFO L231 Difference]: Finished difference. Result has 347 places, 461 transitions, 8704 flow [2024-06-21 15:58:37,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8620, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8704, PETRI_PLACES=347, PETRI_TRANSITIONS=461} [2024-06-21 15:58:37,277 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-21 15:58:37,277 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 461 transitions, 8704 flow [2024-06-21 15:58:37,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:37,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:37,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:37,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 15:58:37,278 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)] === [2024-06-21 15:58:37,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:37,278 INFO L85 PathProgramCache]: Analyzing trace with hash 280822877, now seen corresponding path program 11 times [2024-06-21 15:58:37,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:37,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430724573] [2024-06-21 15:58:37,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:37,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:37,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:37,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430724573] [2024-06-21 15:58:37,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430724573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:37,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:37,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:37,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997682950] [2024-06-21 15:58:37,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:37,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:37,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:37,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:37,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:37,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:37,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 461 transitions, 8704 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:37,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:37,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:37,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:38,127 INFO L124 PetriNetUnfolderBase]: 2370/4015 cut-off events. [2024-06-21 15:58:38,127 INFO L125 PetriNetUnfolderBase]: For 451604/451604 co-relation queries the response was YES. [2024-06-21 15:58:38,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32966 conditions, 4015 events. 2370/4015 cut-off events. For 451604/451604 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 25518 event pairs, 467 based on Foata normal form. 1/4001 useless extension candidates. Maximal degree in co-relation 32803. Up to 3316 conditions per place. [2024-06-21 15:58:38,177 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 298 selfloop transitions, 188 changer transitions 0/494 dead transitions. [2024-06-21 15:58:38,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 494 transitions, 10480 flow [2024-06-21 15:58:38,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:58:38,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:58:38,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-21 15:58:38,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5521064301552107 [2024-06-21 15:58:38,178 INFO L175 Difference]: Start difference. First operand has 347 places, 461 transitions, 8704 flow. Second operand 11 states and 249 transitions. [2024-06-21 15:58:38,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 494 transitions, 10480 flow [2024-06-21 15:58:39,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 494 transitions, 10377 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:39,928 INFO L231 Difference]: Finished difference. Result has 352 places, 470 transitions, 9169 flow [2024-06-21 15:58:39,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8601, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9169, PETRI_PLACES=352, PETRI_TRANSITIONS=470} [2024-06-21 15:58:39,929 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-21 15:58:39,929 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 470 transitions, 9169 flow [2024-06-21 15:58:39,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:39,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:39,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:39,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 15:58:39,930 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)] === [2024-06-21 15:58:39,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:39,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1351051437, now seen corresponding path program 12 times [2024-06-21 15:58:39,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:39,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779304678] [2024-06-21 15:58:39,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:39,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:39,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:40,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:40,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779304678] [2024-06-21 15:58:40,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779304678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:40,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:40,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:40,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855193753] [2024-06-21 15:58:40,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:40,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:40,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:40,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:40,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:40,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:40,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 470 transitions, 9169 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:40,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:40,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:40,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:40,866 INFO L124 PetriNetUnfolderBase]: 2367/4015 cut-off events. [2024-06-21 15:58:40,867 INFO L125 PetriNetUnfolderBase]: For 458838/458838 co-relation queries the response was YES. [2024-06-21 15:58:40,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33299 conditions, 4015 events. 2367/4015 cut-off events. For 458838/458838 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25565 event pairs, 469 based on Foata normal form. 1/4001 useless extension candidates. Maximal degree in co-relation 33135. Up to 3313 conditions per place. [2024-06-21 15:58:40,913 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 299 selfloop transitions, 186 changer transitions 0/493 dead transitions. [2024-06-21 15:58:40,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 493 transitions, 10761 flow [2024-06-21 15:58:40,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:58:40,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:58:40,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-21 15:58:40,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-21 15:58:40,915 INFO L175 Difference]: Start difference. First operand has 352 places, 470 transitions, 9169 flow. Second operand 10 states and 231 transitions. [2024-06-21 15:58:40,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 493 transitions, 10761 flow [2024-06-21 15:58:42,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 493 transitions, 10144 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-21 15:58:42,665 INFO L231 Difference]: Finished difference. Result has 354 places, 470 transitions, 8930 flow [2024-06-21 15:58:42,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8552, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8930, PETRI_PLACES=354, PETRI_TRANSITIONS=470} [2024-06-21 15:58:42,667 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-21 15:58:42,667 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 470 transitions, 8930 flow [2024-06-21 15:58:42,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:42,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:42,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:42,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 15:58:42,667 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)] === [2024-06-21 15:58:42,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:42,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1920996335, now seen corresponding path program 13 times [2024-06-21 15:58:42,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:42,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867256868] [2024-06-21 15:58:42,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:42,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:42,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:42,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867256868] [2024-06-21 15:58:42,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867256868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:42,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:42,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:42,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557719585] [2024-06-21 15:58:42,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:42,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:42,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:42,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:42,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:42,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:42,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 470 transitions, 8930 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:42,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:42,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:42,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:43,506 INFO L124 PetriNetUnfolderBase]: 2364/4009 cut-off events. [2024-06-21 15:58:43,506 INFO L125 PetriNetUnfolderBase]: For 458390/458390 co-relation queries the response was YES. [2024-06-21 15:58:43,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33085 conditions, 4009 events. 2364/4009 cut-off events. For 458390/458390 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25522 event pairs, 469 based on Foata normal form. 1/3995 useless extension candidates. Maximal degree in co-relation 32921. Up to 3310 conditions per place. [2024-06-21 15:58:43,555 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 299 selfloop transitions, 184 changer transitions 0/491 dead transitions. [2024-06-21 15:58:43,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 491 transitions, 10520 flow [2024-06-21 15:58:43,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:43,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:43,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 15:58:43,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-21 15:58:43,556 INFO L175 Difference]: Start difference. First operand has 354 places, 470 transitions, 8930 flow. Second operand 8 states and 191 transitions. [2024-06-21 15:58:43,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 491 transitions, 10520 flow [2024-06-21 15:58:45,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 491 transitions, 10158 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:45,655 INFO L231 Difference]: Finished difference. Result has 356 places, 470 transitions, 8942 flow [2024-06-21 15:58:45,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8568, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8942, PETRI_PLACES=356, PETRI_TRANSITIONS=470} [2024-06-21 15:58:45,655 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-21 15:58:45,655 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 470 transitions, 8942 flow [2024-06-21 15:58:45,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:45,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:45,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:45,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 15:58:45,656 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)] === [2024-06-21 15:58:45,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:45,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1920983315, now seen corresponding path program 14 times [2024-06-21 15:58:45,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:45,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498844292] [2024-06-21 15:58:45,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:45,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:45,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:45,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498844292] [2024-06-21 15:58:45,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498844292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:45,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:45,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:45,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528043660] [2024-06-21 15:58:45,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:45,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:45,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:45,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:45,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:45,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:45,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 470 transitions, 8942 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:45,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:45,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:45,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:46,533 INFO L124 PetriNetUnfolderBase]: 2374/4035 cut-off events. [2024-06-21 15:58:46,533 INFO L125 PetriNetUnfolderBase]: For 466286/466296 co-relation queries the response was YES. [2024-06-21 15:58:46,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33303 conditions, 4035 events. 2374/4035 cut-off events. For 466286/466296 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25763 event pairs, 444 based on Foata normal form. 1/4032 useless extension candidates. Maximal degree in co-relation 33138. Up to 3591 conditions per place. [2024-06-21 15:58:46,583 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 438 selfloop transitions, 45 changer transitions 0/491 dead transitions. [2024-06-21 15:58:46,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 491 transitions, 10050 flow [2024-06-21 15:58:46,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:46,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:46,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 15:58:46,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-21 15:58:46,585 INFO L175 Difference]: Start difference. First operand has 356 places, 470 transitions, 8942 flow. Second operand 8 states and 183 transitions. [2024-06-21 15:58:46,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 491 transitions, 10050 flow [2024-06-21 15:58:48,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 491 transitions, 9664 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 15:58:48,700 INFO L231 Difference]: Finished difference. Result has 357 places, 476 transitions, 8758 flow [2024-06-21 15:58:48,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8568, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8758, PETRI_PLACES=357, PETRI_TRANSITIONS=476} [2024-06-21 15:58:48,700 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-21 15:58:48,701 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 476 transitions, 8758 flow [2024-06-21 15:58:48,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:48,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:48,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:48,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 15:58:48,701 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)] === [2024-06-21 15:58:48,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:48,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1351460637, now seen corresponding path program 15 times [2024-06-21 15:58:48,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:48,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061470745] [2024-06-21 15:58:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:48,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:48,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:48,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061470745] [2024-06-21 15:58:48,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061470745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:48,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:48,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:48,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273437952] [2024-06-21 15:58:48,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:48,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:48,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:48,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:48,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:48,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:48,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 476 transitions, 8758 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:48,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:48,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:48,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:49,587 INFO L124 PetriNetUnfolderBase]: 2371/4033 cut-off events. [2024-06-21 15:58:49,588 INFO L125 PetriNetUnfolderBase]: For 467032/467042 co-relation queries the response was YES. [2024-06-21 15:58:49,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32930 conditions, 4033 events. 2371/4033 cut-off events. For 467032/467042 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25801 event pairs, 444 based on Foata normal form. 1/4030 useless extension candidates. Maximal degree in co-relation 32764. Up to 3577 conditions per place. [2024-06-21 15:58:49,636 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 431 selfloop transitions, 55 changer transitions 0/494 dead transitions. [2024-06-21 15:58:49,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 494 transitions, 9968 flow [2024-06-21 15:58:49,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:58:49,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:58:49,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-21 15:58:49,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390243902439025 [2024-06-21 15:58:49,637 INFO L175 Difference]: Start difference. First operand has 357 places, 476 transitions, 8758 flow. Second operand 10 states and 221 transitions. [2024-06-21 15:58:49,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 494 transitions, 9968 flow [2024-06-21 15:58:51,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 494 transitions, 9860 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:51,445 INFO L231 Difference]: Finished difference. Result has 362 places, 476 transitions, 8766 flow [2024-06-21 15:58:51,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8650, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8766, PETRI_PLACES=362, PETRI_TRANSITIONS=476} [2024-06-21 15:58:51,446 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-21 15:58:51,446 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 476 transitions, 8766 flow [2024-06-21 15:58:51,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:51,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:51,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:51,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 15:58:51,447 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)] === [2024-06-21 15:58:51,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:51,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1915188485, now seen corresponding path program 16 times [2024-06-21 15:58:51,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:51,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405955033] [2024-06-21 15:58:51,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:51,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:51,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:51,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405955033] [2024-06-21 15:58:51,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405955033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:51,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:51,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:51,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045029447] [2024-06-21 15:58:51,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:51,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:51,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:51,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:51,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:51,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:51,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 476 transitions, 8766 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:51,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:51,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:51,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:52,362 INFO L124 PetriNetUnfolderBase]: 2368/4029 cut-off events. [2024-06-21 15:58:52,362 INFO L125 PetriNetUnfolderBase]: For 471047/471057 co-relation queries the response was YES. [2024-06-21 15:58:52,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32903 conditions, 4029 events. 2368/4029 cut-off events. For 471047/471057 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25797 event pairs, 444 based on Foata normal form. 1/4026 useless extension candidates. Maximal degree in co-relation 32736. Up to 3574 conditions per place. [2024-06-21 15:58:52,410 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 432 selfloop transitions, 55 changer transitions 0/495 dead transitions. [2024-06-21 15:58:52,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 495 transitions, 9790 flow [2024-06-21 15:58:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:58:52,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:58:52,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-21 15:58:52,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-21 15:58:52,411 INFO L175 Difference]: Start difference. First operand has 362 places, 476 transitions, 8766 flow. Second operand 12 states and 258 transitions. [2024-06-21 15:58:52,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 495 transitions, 9790 flow [2024-06-21 15:58:54,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 495 transitions, 9556 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 15:58:54,374 INFO L231 Difference]: Finished difference. Result has 364 places, 476 transitions, 8648 flow [2024-06-21 15:58:54,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8532, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8648, PETRI_PLACES=364, PETRI_TRANSITIONS=476} [2024-06-21 15:58:54,375 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-21 15:58:54,375 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 476 transitions, 8648 flow [2024-06-21 15:58:54,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:54,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:54,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:54,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 15:58:54,376 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)] === [2024-06-21 15:58:54,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:54,376 INFO L85 PathProgramCache]: Analyzing trace with hash 204429931, now seen corresponding path program 17 times [2024-06-21 15:58:54,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:54,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319378484] [2024-06-21 15:58:54,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:54,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:54,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:54,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319378484] [2024-06-21 15:58:54,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319378484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:54,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:54,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:54,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711742321] [2024-06-21 15:58:54,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:54,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:54,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:54,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:54,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:54,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:54,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 476 transitions, 8648 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:54,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:54,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:54,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:55,204 INFO L124 PetriNetUnfolderBase]: 2365/4028 cut-off events. [2024-06-21 15:58:55,204 INFO L125 PetriNetUnfolderBase]: For 471125/471125 co-relation queries the response was YES. [2024-06-21 15:58:55,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32802 conditions, 4028 events. 2365/4028 cut-off events. For 471125/471125 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25766 event pairs, 430 based on Foata normal form. 1/4027 useless extension candidates. Maximal degree in co-relation 32636. Up to 3480 conditions per place. [2024-06-21 15:58:55,254 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 414 selfloop transitions, 79 changer transitions 0/501 dead transitions. [2024-06-21 15:58:55,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 501 transitions, 9912 flow [2024-06-21 15:58:55,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:55,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 15:58:55,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-21 15:58:55,255 INFO L175 Difference]: Start difference. First operand has 364 places, 476 transitions, 8648 flow. Second operand 6 states and 159 transitions. [2024-06-21 15:58:55,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 501 transitions, 9912 flow [2024-06-21 15:58:57,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 501 transitions, 9759 flow, removed 3 selfloop flow, removed 14 redundant places. [2024-06-21 15:58:57,281 INFO L231 Difference]: Finished difference. Result has 356 places, 476 transitions, 8677 flow [2024-06-21 15:58:57,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8495, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8677, PETRI_PLACES=356, PETRI_TRANSITIONS=476} [2024-06-21 15:58:57,282 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-21 15:58:57,282 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 476 transitions, 8677 flow [2024-06-21 15:58:57,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:57,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:57,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:57,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 15:58:57,282 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)] === [2024-06-21 15:58:57,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:57,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1965512927, now seen corresponding path program 18 times [2024-06-21 15:58:57,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:57,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364322722] [2024-06-21 15:58:57,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:57,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:57,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:57,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364322722] [2024-06-21 15:58:57,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364322722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:57,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:57,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:57,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666848591] [2024-06-21 15:58:57,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:57,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:57,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:57,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:57,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:57,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:58:57,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 476 transitions, 8677 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:57,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:57,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:58:57,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:58,154 INFO L124 PetriNetUnfolderBase]: 2375/4043 cut-off events. [2024-06-21 15:58:58,154 INFO L125 PetriNetUnfolderBase]: For 483612/483614 co-relation queries the response was YES. [2024-06-21 15:58:58,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33108 conditions, 4043 events. 2375/4043 cut-off events. For 483612/483614 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 25897 event pairs, 419 based on Foata normal form. 2/4043 useless extension candidates. Maximal degree in co-relation 32941. Up to 3302 conditions per place. [2024-06-21 15:58:58,202 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 323 selfloop transitions, 179 changer transitions 0/510 dead transitions. [2024-06-21 15:58:58,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 510 transitions, 10253 flow [2024-06-21 15:58:58,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:58:58,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:58:58,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-21 15:58:58,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-21 15:58:58,203 INFO L175 Difference]: Start difference. First operand has 356 places, 476 transitions, 8677 flow. Second operand 9 states and 222 transitions. [2024-06-21 15:58:58,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 510 transitions, 10253 flow [2024-06-21 15:59:00,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 510 transitions, 10162 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 15:59:00,684 INFO L231 Difference]: Finished difference. Result has 362 places, 482 transitions, 9061 flow [2024-06-21 15:59:00,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8586, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9061, PETRI_PLACES=362, PETRI_TRANSITIONS=482} [2024-06-21 15:59:00,685 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-21 15:59:00,685 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 482 transitions, 9061 flow [2024-06-21 15:59:00,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:00,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:00,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:00,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 15:59:00,685 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)] === [2024-06-21 15:59:00,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:00,686 INFO L85 PathProgramCache]: Analyzing trace with hash 80025565, now seen corresponding path program 19 times [2024-06-21 15:59:00,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:00,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031991777] [2024-06-21 15:59:00,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:00,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:00,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:00,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031991777] [2024-06-21 15:59:00,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031991777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:00,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:00,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:00,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435273186] [2024-06-21 15:59:00,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:00,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:00,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:00,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:00,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:00,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:00,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 482 transitions, 9061 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:00,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:00,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:00,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:01,581 INFO L124 PetriNetUnfolderBase]: 2369/4036 cut-off events. [2024-06-21 15:59:01,581 INFO L125 PetriNetUnfolderBase]: For 485203/485205 co-relation queries the response was YES. [2024-06-21 15:59:01,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33253 conditions, 4036 events. 2369/4036 cut-off events. For 485203/485205 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 25842 event pairs, 418 based on Foata normal form. 2/4036 useless extension candidates. Maximal degree in co-relation 33085. Up to 3296 conditions per place. [2024-06-21 15:59:01,632 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 183 changer transitions 0/513 dead transitions. [2024-06-21 15:59:01,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 513 transitions, 10567 flow [2024-06-21 15:59:01,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:01,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 15:59:01,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-21 15:59:01,634 INFO L175 Difference]: Start difference. First operand has 362 places, 482 transitions, 9061 flow. Second operand 8 states and 206 transitions. [2024-06-21 15:59:01,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 513 transitions, 10567 flow [2024-06-21 15:59:03,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 513 transitions, 10250 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 15:59:03,846 INFO L231 Difference]: Finished difference. Result has 363 places, 482 transitions, 9132 flow [2024-06-21 15:59:03,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8748, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9132, PETRI_PLACES=363, PETRI_TRANSITIONS=482} [2024-06-21 15:59:03,846 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-21 15:59:03,846 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 482 transitions, 9132 flow [2024-06-21 15:59:03,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:03,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:03,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:03,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 15:59:03,847 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)] === [2024-06-21 15:59:03,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:03,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1411264625, now seen corresponding path program 20 times [2024-06-21 15:59:03,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:03,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214367342] [2024-06-21 15:59:03,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:03,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:03,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:03,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214367342] [2024-06-21 15:59:03,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214367342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:03,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:03,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:03,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466763290] [2024-06-21 15:59:03,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:03,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:03,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:03,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:03,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:03,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:03,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 482 transitions, 9132 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:03,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:03,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:03,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:04,756 INFO L124 PetriNetUnfolderBase]: 2366/4034 cut-off events. [2024-06-21 15:59:04,756 INFO L125 PetriNetUnfolderBase]: For 478814/478814 co-relation queries the response was YES. [2024-06-21 15:59:04,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33182 conditions, 4034 events. 2366/4034 cut-off events. For 478814/478814 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 25893 event pairs, 430 based on Foata normal form. 1/4033 useless extension candidates. Maximal degree in co-relation 33014. Up to 3483 conditions per place. [2024-06-21 15:59:04,806 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 424 selfloop transitions, 82 changer transitions 0/514 dead transitions. [2024-06-21 15:59:04,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 514 transitions, 10252 flow [2024-06-21 15:59:04,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:04,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:04,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 15:59:04,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 15:59:04,808 INFO L175 Difference]: Start difference. First operand has 363 places, 482 transitions, 9132 flow. Second operand 8 states and 204 transitions. [2024-06-21 15:59:04,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 514 transitions, 10252 flow [2024-06-21 15:59:07,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 514 transitions, 9907 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:07,378 INFO L231 Difference]: Finished difference. Result has 365 places, 482 transitions, 8968 flow [2024-06-21 15:59:07,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8787, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8968, PETRI_PLACES=365, PETRI_TRANSITIONS=482} [2024-06-21 15:59:07,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-21 15:59:07,379 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 482 transitions, 8968 flow [2024-06-21 15:59:07,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:07,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:07,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:07,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 15:59:07,379 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)] === [2024-06-21 15:59:07,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:07,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1364252109, now seen corresponding path program 21 times [2024-06-21 15:59:07,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:07,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716455122] [2024-06-21 15:59:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:07,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:07,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:07,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716455122] [2024-06-21 15:59:07,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716455122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:07,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:07,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:07,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414445073] [2024-06-21 15:59:07,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:07,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:07,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:07,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:07,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:07,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:07,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 482 transitions, 8968 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:07,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:07,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:07,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:08,225 INFO L124 PetriNetUnfolderBase]: 2363/4022 cut-off events. [2024-06-21 15:59:08,226 INFO L125 PetriNetUnfolderBase]: For 470379/470379 co-relation queries the response was YES. [2024-06-21 15:59:08,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32867 conditions, 4022 events. 2363/4022 cut-off events. For 470379/470379 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 25757 event pairs, 438 based on Foata normal form. 1/4010 useless extension candidates. Maximal degree in co-relation 32699. Up to 3290 conditions per place. [2024-06-21 15:59:08,280 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 177 changer transitions 0/507 dead transitions. [2024-06-21 15:59:08,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 507 transitions, 10446 flow [2024-06-21 15:59:08,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:08,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:08,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 15:59:08,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-21 15:59:08,281 INFO L175 Difference]: Start difference. First operand has 365 places, 482 transitions, 8968 flow. Second operand 7 states and 179 transitions. [2024-06-21 15:59:08,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 507 transitions, 10446 flow [2024-06-21 15:59:10,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 507 transitions, 10279 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:10,774 INFO L231 Difference]: Finished difference. Result has 366 places, 482 transitions, 9165 flow [2024-06-21 15:59:10,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8805, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9165, PETRI_PLACES=366, PETRI_TRANSITIONS=482} [2024-06-21 15:59:10,774 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-21 15:59:10,774 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 482 transitions, 9165 flow [2024-06-21 15:59:10,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:10,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:10,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:10,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 15:59:10,775 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)] === [2024-06-21 15:59:10,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:10,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1914963363, now seen corresponding path program 1 times [2024-06-21 15:59:10,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:10,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80869165] [2024-06-21 15:59:10,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:10,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:10,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:10,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80869165] [2024-06-21 15:59:10,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80869165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:10,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:10,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:10,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537135768] [2024-06-21 15:59:10,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:10,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:10,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:10,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:10,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:10,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:10,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 482 transitions, 9165 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:10,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:10,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:10,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:11,690 INFO L124 PetriNetUnfolderBase]: 2370/4044 cut-off events. [2024-06-21 15:59:11,690 INFO L125 PetriNetUnfolderBase]: For 470544/470554 co-relation queries the response was YES. [2024-06-21 15:59:11,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32547 conditions, 4044 events. 2370/4044 cut-off events. For 470544/470554 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 25980 event pairs, 437 based on Foata normal form. 6/4046 useless extension candidates. Maximal degree in co-relation 32379. Up to 3527 conditions per place. [2024-06-21 15:59:11,741 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 452 selfloop transitions, 47 changer transitions 0/507 dead transitions. [2024-06-21 15:59:11,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 507 transitions, 10268 flow [2024-06-21 15:59:11,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:59:11,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:59:11,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-21 15:59:11,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439024390243903 [2024-06-21 15:59:11,742 INFO L175 Difference]: Start difference. First operand has 366 places, 482 transitions, 9165 flow. Second operand 10 states and 223 transitions. [2024-06-21 15:59:11,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 507 transitions, 10268 flow [2024-06-21 15:59:14,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 507 transitions, 9357 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-21 15:59:14,397 INFO L231 Difference]: Finished difference. Result has 365 places, 483 transitions, 8371 flow [2024-06-21 15:59:14,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8254, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8371, PETRI_PLACES=365, PETRI_TRANSITIONS=483} [2024-06-21 15:59:14,398 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-21 15:59:14,398 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 483 transitions, 8371 flow [2024-06-21 15:59:14,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:14,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:14,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:14,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 15:59:14,398 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)] === [2024-06-21 15:59:14,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:14,399 INFO L85 PathProgramCache]: Analyzing trace with hash 204921963, now seen corresponding path program 2 times [2024-06-21 15:59:14,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:14,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305549461] [2024-06-21 15:59:14,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:14,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:14,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:14,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305549461] [2024-06-21 15:59:14,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305549461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:14,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:14,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:14,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900467267] [2024-06-21 15:59:14,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:14,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:14,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:14,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:14,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:14,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:14,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 483 transitions, 8371 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:14,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:14,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:14,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:15,291 INFO L124 PetriNetUnfolderBase]: 2357/4029 cut-off events. [2024-06-21 15:59:15,291 INFO L125 PetriNetUnfolderBase]: For 437402/437412 co-relation queries the response was YES. [2024-06-21 15:59:15,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31323 conditions, 4029 events. 2357/4029 cut-off events. For 437402/437412 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 25884 event pairs, 386 based on Foata normal form. 6/4033 useless extension candidates. Maximal degree in co-relation 31153. Up to 3487 conditions per place. [2024-06-21 15:59:15,335 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 469 selfloop transitions, 30 changer transitions 0/507 dead transitions. [2024-06-21 15:59:15,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 507 transitions, 9479 flow [2024-06-21 15:59:15,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:15,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 15:59:15,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-21 15:59:15,337 INFO L175 Difference]: Start difference. First operand has 365 places, 483 transitions, 8371 flow. Second operand 6 states and 153 transitions. [2024-06-21 15:59:15,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 507 transitions, 9479 flow [2024-06-21 15:59:17,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 507 transitions, 9354 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 15:59:17,530 INFO L231 Difference]: Finished difference. Result has 362 places, 483 transitions, 8311 flow [2024-06-21 15:59:17,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8246, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8311, PETRI_PLACES=362, PETRI_TRANSITIONS=483} [2024-06-21 15:59:17,531 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-21 15:59:17,531 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 483 transitions, 8311 flow [2024-06-21 15:59:17,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:17,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:17,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:17,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 15:59:17,531 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)] === [2024-06-21 15:59:17,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:17,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1491753271, now seen corresponding path program 1 times [2024-06-21 15:59:17,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:17,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468805383] [2024-06-21 15:59:17,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:17,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:17,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:17,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468805383] [2024-06-21 15:59:17,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468805383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:17,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:17,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:17,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412511441] [2024-06-21 15:59:17,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:17,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:17,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:17,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:17,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:17,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:17,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 483 transitions, 8311 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:17,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:17,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:17,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:18,421 INFO L124 PetriNetUnfolderBase]: 2362/4034 cut-off events. [2024-06-21 15:59:18,422 INFO L125 PetriNetUnfolderBase]: For 415902/415902 co-relation queries the response was YES. [2024-06-21 15:59:18,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31264 conditions, 4034 events. 2362/4034 cut-off events. For 415902/415902 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 25907 event pairs, 409 based on Foata normal form. 1/4033 useless extension candidates. Maximal degree in co-relation 31094. Up to 3509 conditions per place. [2024-06-21 15:59:18,472 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 454 selfloop transitions, 58 changer transitions 0/520 dead transitions. [2024-06-21 15:59:18,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 520 transitions, 9705 flow [2024-06-21 15:59:18,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:18,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:18,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 15:59:18,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-21 15:59:18,473 INFO L175 Difference]: Start difference. First operand has 362 places, 483 transitions, 8311 flow. Second operand 8 states and 197 transitions. [2024-06-21 15:59:18,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 520 transitions, 9705 flow [2024-06-21 15:59:20,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 520 transitions, 9596 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:20,589 INFO L231 Difference]: Finished difference. Result has 364 places, 486 transitions, 8378 flow [2024-06-21 15:59:20,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8202, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8378, PETRI_PLACES=364, PETRI_TRANSITIONS=486} [2024-06-21 15:59:20,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-21 15:59:20,589 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 486 transitions, 8378 flow [2024-06-21 15:59:20,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:20,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:20,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:20,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 15:59:20,590 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)] === [2024-06-21 15:59:20,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:20,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1491633301, now seen corresponding path program 2 times [2024-06-21 15:59:20,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:20,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301791623] [2024-06-21 15:59:20,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:20,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:20,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:20,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301791623] [2024-06-21 15:59:20,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301791623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:20,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:20,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:20,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959691596] [2024-06-21 15:59:20,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:20,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:20,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:20,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:20,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:20,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:20,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 486 transitions, 8378 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:20,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:20,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:20,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:21,599 INFO L124 PetriNetUnfolderBase]: 2359/4030 cut-off events. [2024-06-21 15:59:21,600 INFO L125 PetriNetUnfolderBase]: For 418135/418135 co-relation queries the response was YES. [2024-06-21 15:59:21,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31034 conditions, 4030 events. 2359/4030 cut-off events. For 418135/418135 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 25902 event pairs, 409 based on Foata normal form. 1/4029 useless extension candidates. Maximal degree in co-relation 30864. Up to 3506 conditions per place. [2024-06-21 15:59:21,642 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 455 selfloop transitions, 57 changer transitions 0/520 dead transitions. [2024-06-21 15:59:21,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 520 transitions, 9518 flow [2024-06-21 15:59:21,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:59:21,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:59:21,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-21 15:59:21,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-21 15:59:21,643 INFO L175 Difference]: Start difference. First operand has 364 places, 486 transitions, 8378 flow. Second operand 9 states and 215 transitions. [2024-06-21 15:59:21,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 520 transitions, 9518 flow [2024-06-21 15:59:24,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 520 transitions, 9380 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:24,162 INFO L231 Difference]: Finished difference. Result has 367 places, 486 transitions, 8360 flow [2024-06-21 15:59:24,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8240, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8360, PETRI_PLACES=367, PETRI_TRANSITIONS=486} [2024-06-21 15:59:24,162 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-21 15:59:24,163 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 486 transitions, 8360 flow [2024-06-21 15:59:24,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:24,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:24,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:24,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 15:59:24,163 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)] === [2024-06-21 15:59:24,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:24,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1491633115, now seen corresponding path program 1 times [2024-06-21 15:59:24,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:24,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393107597] [2024-06-21 15:59:24,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:24,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:24,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:24,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393107597] [2024-06-21 15:59:24,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393107597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:24,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:24,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:24,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377796831] [2024-06-21 15:59:24,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:24,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:24,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:24,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:24,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:24,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:24,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 486 transitions, 8360 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:24,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:24,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:24,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:25,072 INFO L124 PetriNetUnfolderBase]: 2372/4055 cut-off events. [2024-06-21 15:59:25,073 INFO L125 PetriNetUnfolderBase]: For 424286/424286 co-relation queries the response was YES. [2024-06-21 15:59:25,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31291 conditions, 4055 events. 2372/4055 cut-off events. For 424286/424286 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 26083 event pairs, 408 based on Foata normal form. 1/4054 useless extension candidates. Maximal degree in co-relation 31120. Up to 3451 conditions per place. [2024-06-21 15:59:25,123 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 418 selfloop transitions, 102 changer transitions 0/528 dead transitions. [2024-06-21 15:59:25,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 528 transitions, 10048 flow [2024-06-21 15:59:25,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:59:25,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:59:25,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-21 15:59:25,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-21 15:59:25,124 INFO L175 Difference]: Start difference. First operand has 367 places, 486 transitions, 8360 flow. Second operand 9 states and 222 transitions. [2024-06-21 15:59:25,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 528 transitions, 10048 flow [2024-06-21 15:59:27,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 528 transitions, 9897 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 15:59:27,722 INFO L231 Difference]: Finished difference. Result has 369 places, 492 transitions, 8590 flow [2024-06-21 15:59:27,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8209, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8590, PETRI_PLACES=369, PETRI_TRANSITIONS=492} [2024-06-21 15:59:27,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-21 15:59:27,723 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 492 transitions, 8590 flow [2024-06-21 15:59:27,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:27,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:27,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:27,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 15:59:27,723 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)] === [2024-06-21 15:59:27,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:27,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1580291131, now seen corresponding path program 1 times [2024-06-21 15:59:27,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:27,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714774267] [2024-06-21 15:59:27,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:27,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:27,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:27,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:27,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714774267] [2024-06-21 15:59:27,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714774267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:27,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:27,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:27,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361638652] [2024-06-21 15:59:27,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:27,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:27,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:27,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:27,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:27,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:27,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 492 transitions, 8590 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:27,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:27,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:27,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:28,754 INFO L124 PetriNetUnfolderBase]: 2452/4193 cut-off events. [2024-06-21 15:59:28,755 INFO L125 PetriNetUnfolderBase]: For 462269/462269 co-relation queries the response was YES. [2024-06-21 15:59:28,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32596 conditions, 4193 events. 2452/4193 cut-off events. For 462269/462269 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 27108 event pairs, 351 based on Foata normal form. 6/4197 useless extension candidates. Maximal degree in co-relation 32423. Up to 3483 conditions per place. [2024-06-21 15:59:28,799 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 477 selfloop transitions, 48 changer transitions 0/533 dead transitions. [2024-06-21 15:59:28,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 533 transitions, 10054 flow [2024-06-21 15:59:28,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:28,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:28,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 15:59:28,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 15:59:28,801 INFO L175 Difference]: Start difference. First operand has 369 places, 492 transitions, 8590 flow. Second operand 8 states and 200 transitions. [2024-06-21 15:59:28,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 533 transitions, 10054 flow [2024-06-21 15:59:31,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 533 transitions, 9685 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:31,183 INFO L231 Difference]: Finished difference. Result has 373 places, 496 transitions, 8397 flow [2024-06-21 15:59:31,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8221, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8397, PETRI_PLACES=373, PETRI_TRANSITIONS=496} [2024-06-21 15:59:31,183 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-21 15:59:31,183 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 496 transitions, 8397 flow [2024-06-21 15:59:31,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:31,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:31,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:31,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 15:59:31,184 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)] === [2024-06-21 15:59:31,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:31,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1314593851, now seen corresponding path program 2 times [2024-06-21 15:59:31,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:31,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165656053] [2024-06-21 15:59:31,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:31,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:31,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:31,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165656053] [2024-06-21 15:59:31,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165656053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:31,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:31,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:31,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005541617] [2024-06-21 15:59:31,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:31,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:31,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:31,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:31,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:31,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:31,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 496 transitions, 8397 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:31,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:31,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:31,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:32,130 INFO L124 PetriNetUnfolderBase]: 2518/4303 cut-off events. [2024-06-21 15:59:32,130 INFO L125 PetriNetUnfolderBase]: For 470120/470120 co-relation queries the response was YES. [2024-06-21 15:59:32,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33469 conditions, 4303 events. 2518/4303 cut-off events. For 470120/470120 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 28010 event pairs, 437 based on Foata normal form. 6/4307 useless extension candidates. Maximal degree in co-relation 33295. Up to 3728 conditions per place. [2024-06-21 15:59:32,184 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 480 selfloop transitions, 50 changer transitions 0/538 dead transitions. [2024-06-21 15:59:32,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 538 transitions, 9779 flow [2024-06-21 15:59:32,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:32,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 15:59:32,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-21 15:59:32,186 INFO L175 Difference]: Start difference. First operand has 373 places, 496 transitions, 8397 flow. Second operand 8 states and 196 transitions. [2024-06-21 15:59:32,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 538 transitions, 9779 flow [2024-06-21 15:59:34,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 538 transitions, 9645 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:34,509 INFO L231 Difference]: Finished difference. Result has 377 places, 505 transitions, 8544 flow [2024-06-21 15:59:34,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8276, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8544, PETRI_PLACES=377, PETRI_TRANSITIONS=505} [2024-06-21 15:59:34,509 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-21 15:59:34,510 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 505 transitions, 8544 flow [2024-06-21 15:59:34,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:34,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:34,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:34,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 15:59:34,510 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)] === [2024-06-21 15:59:34,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:34,511 INFO L85 PathProgramCache]: Analyzing trace with hash -533776097, now seen corresponding path program 3 times [2024-06-21 15:59:34,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:34,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26819159] [2024-06-21 15:59:34,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:34,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:34,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:34,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26819159] [2024-06-21 15:59:34,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26819159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:34,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:34,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:34,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74220897] [2024-06-21 15:59:34,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:34,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:34,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:34,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:34,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:34,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:34,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 505 transitions, 8544 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:34,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:34,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:34,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:35,529 INFO L124 PetriNetUnfolderBase]: 2547/4344 cut-off events. [2024-06-21 15:59:35,530 INFO L125 PetriNetUnfolderBase]: For 469506/469520 co-relation queries the response was YES. [2024-06-21 15:59:35,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34119 conditions, 4344 events. 2547/4344 cut-off events. For 469506/469520 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 28284 event pairs, 460 based on Foata normal form. 2/4340 useless extension candidates. Maximal degree in co-relation 33944. Up to 3432 conditions per place. [2024-06-21 15:59:35,573 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 358 selfloop transitions, 180 changer transitions 0/546 dead transitions. [2024-06-21 15:59:35,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 546 transitions, 10386 flow [2024-06-21 15:59:35,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:35,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:35,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 15:59:35,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-21 15:59:35,575 INFO L175 Difference]: Start difference. First operand has 377 places, 505 transitions, 8544 flow. Second operand 8 states and 201 transitions. [2024-06-21 15:59:35,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 546 transitions, 10386 flow [2024-06-21 15:59:38,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 546 transitions, 10282 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:38,021 INFO L231 Difference]: Finished difference. Result has 381 places, 517 transitions, 9062 flow [2024-06-21 15:59:38,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8440, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9062, PETRI_PLACES=381, PETRI_TRANSITIONS=517} [2024-06-21 15:59:38,022 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-21 15:59:38,022 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 517 transitions, 9062 flow [2024-06-21 15:59:38,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:38,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:38,022 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] [2024-06-21 15:59:38,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 15:59:38,022 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)] === [2024-06-21 15:59:38,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:38,023 INFO L85 PathProgramCache]: Analyzing trace with hash -533655941, now seen corresponding path program 2 times [2024-06-21 15:59:38,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:38,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264651937] [2024-06-21 15:59:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:38,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:38,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:38,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264651937] [2024-06-21 15:59:38,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264651937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:38,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:38,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:38,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644185884] [2024-06-21 15:59:38,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:38,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:38,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:38,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:38,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:38,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:38,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 517 transitions, 9062 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:38,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:38,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:38,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:38,930 INFO L124 PetriNetUnfolderBase]: 2560/4365 cut-off events. [2024-06-21 15:59:38,931 INFO L125 PetriNetUnfolderBase]: For 486419/486435 co-relation queries the response was YES. [2024-06-21 15:59:38,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34821 conditions, 4365 events. 2560/4365 cut-off events. For 486419/486435 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 28419 event pairs, 464 based on Foata normal form. 2/4361 useless extension candidates. Maximal degree in co-relation 34645. Up to 3131 conditions per place. [2024-06-21 15:59:38,986 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 268 selfloop transitions, 278 changer transitions 0/554 dead transitions. [2024-06-21 15:59:38,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 554 transitions, 11134 flow [2024-06-21 15:59:38,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:38,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:38,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 15:59:38,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-21 15:59:38,987 INFO L175 Difference]: Start difference. First operand has 381 places, 517 transitions, 9062 flow. Second operand 8 states and 202 transitions. [2024-06-21 15:59:38,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 554 transitions, 11134 flow [2024-06-21 15:59:41,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 554 transitions, 10652 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:41,581 INFO L231 Difference]: Finished difference. Result has 386 places, 526 transitions, 9607 flow [2024-06-21 15:59:41,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8580, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9607, PETRI_PLACES=386, PETRI_TRANSITIONS=526} [2024-06-21 15:59:41,581 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-21 15:59:41,581 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 526 transitions, 9607 flow [2024-06-21 15:59:41,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:41,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:41,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:41,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 15:59:41,582 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)] === [2024-06-21 15:59:41,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:41,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1290852483, now seen corresponding path program 4 times [2024-06-21 15:59:41,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:41,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050581996] [2024-06-21 15:59:41,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:41,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:41,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:41,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050581996] [2024-06-21 15:59:41,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050581996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:41,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:41,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:41,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127821676] [2024-06-21 15:59:41,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:41,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:41,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:41,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:41,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:41,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:41,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 526 transitions, 9607 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:41,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:41,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:41,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:42,616 INFO L124 PetriNetUnfolderBase]: 2565/4376 cut-off events. [2024-06-21 15:59:42,617 INFO L125 PetriNetUnfolderBase]: For 498726/498742 co-relation queries the response was YES. [2024-06-21 15:59:42,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35923 conditions, 4376 events. 2565/4376 cut-off events. For 498726/498742 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 28563 event pairs, 460 based on Foata normal form. 2/4372 useless extension candidates. Maximal degree in co-relation 35744. Up to 3456 conditions per place. [2024-06-21 15:59:42,665 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 364 selfloop transitions, 182 changer transitions 0/554 dead transitions. [2024-06-21 15:59:42,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 554 transitions, 11032 flow [2024-06-21 15:59:42,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:42,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:42,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 15:59:42,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-21 15:59:42,666 INFO L175 Difference]: Start difference. First operand has 386 places, 526 transitions, 9607 flow. Second operand 8 states and 196 transitions. [2024-06-21 15:59:42,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 554 transitions, 11032 flow [2024-06-21 15:59:45,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 554 transitions, 10801 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-21 15:59:45,327 INFO L231 Difference]: Finished difference. Result has 391 places, 529 transitions, 9787 flow [2024-06-21 15:59:45,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9376, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9787, PETRI_PLACES=391, PETRI_TRANSITIONS=529} [2024-06-21 15:59:45,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-21 15:59:45,327 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 529 transitions, 9787 flow [2024-06-21 15:59:45,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:45,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:45,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:45,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 15:59:45,328 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)] === [2024-06-21 15:59:45,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:45,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1173546649, now seen corresponding path program 5 times [2024-06-21 15:59:45,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:45,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381056238] [2024-06-21 15:59:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:45,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:45,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:45,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381056238] [2024-06-21 15:59:45,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381056238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:45,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:45,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:45,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256191466] [2024-06-21 15:59:45,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:45,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:45,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:45,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:45,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:45,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:45,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 529 transitions, 9787 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:45,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:45,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:45,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:46,257 INFO L124 PetriNetUnfolderBase]: 2602/4436 cut-off events. [2024-06-21 15:59:46,257 INFO L125 PetriNetUnfolderBase]: For 528578/528586 co-relation queries the response was YES. [2024-06-21 15:59:46,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36366 conditions, 4436 events. 2602/4436 cut-off events. For 528578/528586 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 28960 event pairs, 455 based on Foata normal form. 2/4434 useless extension candidates. Maximal degree in co-relation 36185. Up to 3498 conditions per place. [2024-06-21 15:59:46,314 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 358 selfloop transitions, 205 changer transitions 0/571 dead transitions. [2024-06-21 15:59:46,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 571 transitions, 12024 flow [2024-06-21 15:59:46,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:46,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:46,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 15:59:46,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-21 15:59:46,315 INFO L175 Difference]: Start difference. First operand has 391 places, 529 transitions, 9787 flow. Second operand 7 states and 179 transitions. [2024-06-21 15:59:46,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 571 transitions, 12024 flow [2024-06-21 15:59:49,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 571 transitions, 11774 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:49,690 INFO L231 Difference]: Finished difference. Result has 393 places, 544 transitions, 10334 flow [2024-06-21 15:59:49,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9552, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10334, PETRI_PLACES=393, PETRI_TRANSITIONS=544} [2024-06-21 15:59:49,690 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-21 15:59:49,690 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 544 transitions, 10334 flow [2024-06-21 15:59:49,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:49,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:49,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:49,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 15:59:49,691 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)] === [2024-06-21 15:59:49,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:49,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1163071129, now seen corresponding path program 6 times [2024-06-21 15:59:49,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:49,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003518115] [2024-06-21 15:59:49,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:49,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:49,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:49,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003518115] [2024-06-21 15:59:49,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003518115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:49,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:49,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:49,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911119137] [2024-06-21 15:59:49,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:49,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:49,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:49,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:49,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:49,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:49,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 544 transitions, 10334 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:49,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:49,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:49,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:50,679 INFO L124 PetriNetUnfolderBase]: 2615/4458 cut-off events. [2024-06-21 15:59:50,679 INFO L125 PetriNetUnfolderBase]: For 547499/547507 co-relation queries the response was YES. [2024-06-21 15:59:50,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36855 conditions, 4458 events. 2615/4458 cut-off events. For 547499/547507 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 29198 event pairs, 455 based on Foata normal form. 2/4456 useless extension candidates. Maximal degree in co-relation 36673. Up to 3513 conditions per place. [2024-06-21 15:59:50,733 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 349 selfloop transitions, 216 changer transitions 0/573 dead transitions. [2024-06-21 15:59:50,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 573 transitions, 12338 flow [2024-06-21 15:59:50,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:50,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:50,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 15:59:50,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-21 15:59:50,734 INFO L175 Difference]: Start difference. First operand has 393 places, 544 transitions, 10334 flow. Second operand 7 states and 176 transitions. [2024-06-21 15:59:50,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 573 transitions, 12338 flow [2024-06-21 15:59:53,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 573 transitions, 11996 flow, removed 79 selfloop flow, removed 2 redundant places. [2024-06-21 15:59:53,492 INFO L231 Difference]: Finished difference. Result has 398 places, 550 transitions, 10582 flow [2024-06-21 15:59:53,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10026, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10582, PETRI_PLACES=398, PETRI_TRANSITIONS=550} [2024-06-21 15:59:53,492 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-21 15:59:53,492 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 550 transitions, 10582 flow [2024-06-21 15:59:53,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:53,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:53,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:53,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 15:59:53,493 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)] === [2024-06-21 15:59:53,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:53,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1047601213, now seen corresponding path program 3 times [2024-06-21 15:59:53,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:53,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179665923] [2024-06-21 15:59:53,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:53,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:53,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:53,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179665923] [2024-06-21 15:59:53,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179665923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:53,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:53,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:53,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803713895] [2024-06-21 15:59:53,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:53,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:53,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:53,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:53,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:53,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:53,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 550 transitions, 10582 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:53,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:53,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:53,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:54,484 INFO L124 PetriNetUnfolderBase]: 2628/4471 cut-off events. [2024-06-21 15:59:54,484 INFO L125 PetriNetUnfolderBase]: For 565594/565610 co-relation queries the response was YES. [2024-06-21 15:59:54,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37163 conditions, 4471 events. 2628/4471 cut-off events. For 565594/565610 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29190 event pairs, 462 based on Foata normal form. 2/4467 useless extension candidates. Maximal degree in co-relation 36980. Up to 3183 conditions per place. [2024-06-21 15:59:54,544 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 276 selfloop transitions, 297 changer transitions 0/581 dead transitions. [2024-06-21 15:59:54,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 581 transitions, 12634 flow [2024-06-21 15:59:54,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:54,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:54,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 15:59:54,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-21 15:59:54,545 INFO L175 Difference]: Start difference. First operand has 398 places, 550 transitions, 10582 flow. Second operand 8 states and 199 transitions. [2024-06-21 15:59:54,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 581 transitions, 12634 flow [2024-06-21 15:59:57,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 581 transitions, 12313 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 15:59:57,937 INFO L231 Difference]: Finished difference. Result has 403 places, 556 transitions, 10985 flow [2024-06-21 15:59:57,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10261, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10985, PETRI_PLACES=403, PETRI_TRANSITIONS=556} [2024-06-21 15:59:57,937 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-21 15:59:57,938 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 556 transitions, 10985 flow [2024-06-21 15:59:57,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:57,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:57,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:57,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 15:59:57,938 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)] === [2024-06-21 15:59:57,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:57,939 INFO L85 PathProgramCache]: Analyzing trace with hash -208915007, now seen corresponding path program 7 times [2024-06-21 15:59:57,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:57,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487202741] [2024-06-21 15:59:57,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:57,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:58,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:58,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487202741] [2024-06-21 15:59:58,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487202741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:58,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:58,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:58,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288579213] [2024-06-21 15:59:58,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:58,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:58,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:58,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:58,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:58,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 15:59:58,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 556 transitions, 10985 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:58,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:58,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 15:59:58,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:58,953 INFO L124 PetriNetUnfolderBase]: 2625/4473 cut-off events. [2024-06-21 15:59:58,953 INFO L125 PetriNetUnfolderBase]: For 571488/571504 co-relation queries the response was YES. [2024-06-21 15:59:58,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37356 conditions, 4473 events. 2625/4473 cut-off events. For 571488/571504 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 29306 event pairs, 460 based on Foata normal form. 2/4469 useless extension candidates. Maximal degree in co-relation 37172. Up to 3528 conditions per place. [2024-06-21 15:59:59,010 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 367 selfloop transitions, 203 changer transitions 0/578 dead transitions. [2024-06-21 15:59:59,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 578 transitions, 12413 flow [2024-06-21 15:59:59,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:59,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:59,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 15:59:59,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-21 15:59:59,012 INFO L175 Difference]: Start difference. First operand has 403 places, 556 transitions, 10985 flow. Second operand 8 states and 193 transitions. [2024-06-21 15:59:59,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 578 transitions, 12413 flow [2024-06-21 16:00:02,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 578 transitions, 11844 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 16:00:02,207 INFO L231 Difference]: Finished difference. Result has 406 places, 556 transitions, 10828 flow [2024-06-21 16:00:02,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10416, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10828, PETRI_PLACES=406, PETRI_TRANSITIONS=556} [2024-06-21 16:00:02,208 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-21 16:00:02,208 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 556 transitions, 10828 flow [2024-06-21 16:00:02,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:02,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:02,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:02,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 16:00:02,208 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)] === [2024-06-21 16:00:02,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:02,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1047779959, now seen corresponding path program 8 times [2024-06-21 16:00:02,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:02,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424518742] [2024-06-21 16:00:02,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:02,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:02,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:02,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424518742] [2024-06-21 16:00:02,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424518742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:02,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:02,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:02,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141845104] [2024-06-21 16:00:02,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:02,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:02,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:02,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:02,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:02,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:02,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 556 transitions, 10828 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:02,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:02,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:02,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:03,224 INFO L124 PetriNetUnfolderBase]: 2630/4480 cut-off events. [2024-06-21 16:00:03,225 INFO L125 PetriNetUnfolderBase]: For 579871/579887 co-relation queries the response was YES. [2024-06-21 16:00:03,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37293 conditions, 4480 events. 2630/4480 cut-off events. For 579871/579887 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 29322 event pairs, 460 based on Foata normal form. 2/4476 useless extension candidates. Maximal degree in co-relation 37108. Up to 3534 conditions per place. [2024-06-21 16:00:03,283 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 367 selfloop transitions, 206 changer transitions 0/581 dead transitions. [2024-06-21 16:00:03,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 581 transitions, 12320 flow [2024-06-21 16:00:03,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:03,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:03,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 16:00:03,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 16:00:03,284 INFO L175 Difference]: Start difference. First operand has 406 places, 556 transitions, 10828 flow. Second operand 8 states and 194 transitions. [2024-06-21 16:00:03,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 581 transitions, 12320 flow [2024-06-21 16:00:07,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 581 transitions, 11735 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 16:00:07,090 INFO L231 Difference]: Finished difference. Result has 407 places, 559 transitions, 10717 flow [2024-06-21 16:00:07,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10252, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10717, PETRI_PLACES=407, PETRI_TRANSITIONS=559} [2024-06-21 16:00:07,091 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-21 16:00:07,091 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 559 transitions, 10717 flow [2024-06-21 16:00:07,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:07,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:07,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:07,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 16:00:07,091 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)] === [2024-06-21 16:00:07,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:07,092 INFO L85 PathProgramCache]: Analyzing trace with hash 2091647585, now seen corresponding path program 4 times [2024-06-21 16:00:07,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:07,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106355793] [2024-06-21 16:00:07,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:07,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:07,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:07,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106355793] [2024-06-21 16:00:07,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106355793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:07,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:07,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:07,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672083554] [2024-06-21 16:00:07,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:07,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:07,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:07,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:07,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:07,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:07,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 559 transitions, 10717 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:07,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:07,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:07,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:08,072 INFO L124 PetriNetUnfolderBase]: 2627/4475 cut-off events. [2024-06-21 16:00:08,072 INFO L125 PetriNetUnfolderBase]: For 577966/577982 co-relation queries the response was YES. [2024-06-21 16:00:08,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37143 conditions, 4475 events. 2627/4475 cut-off events. For 577966/577982 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 29347 event pairs, 462 based on Foata normal form. 2/4471 useless extension candidates. Maximal degree in co-relation 36957. Up to 3183 conditions per place. [2024-06-21 16:00:08,133 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 278 selfloop transitions, 297 changer transitions 0/583 dead transitions. [2024-06-21 16:00:08,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 583 transitions, 12439 flow [2024-06-21 16:00:08,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:08,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:08,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 16:00:08,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-21 16:00:08,134 INFO L175 Difference]: Start difference. First operand has 407 places, 559 transitions, 10717 flow. Second operand 8 states and 199 transitions. [2024-06-21 16:00:08,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 583 transitions, 12439 flow [2024-06-21 16:00:11,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 583 transitions, 12130 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 16:00:11,698 INFO L231 Difference]: Finished difference. Result has 410 places, 559 transitions, 11008 flow [2024-06-21 16:00:11,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10408, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11008, PETRI_PLACES=410, PETRI_TRANSITIONS=559} [2024-06-21 16:00:11,699 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-21 16:00:11,699 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 559 transitions, 11008 flow [2024-06-21 16:00:11,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:11,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:11,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:11,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 16:00:11,699 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)] === [2024-06-21 16:00:11,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:11,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1899966113, now seen corresponding path program 5 times [2024-06-21 16:00:11,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:11,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674551903] [2024-06-21 16:00:11,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:11,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:11,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:11,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674551903] [2024-06-21 16:00:11,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674551903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:11,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:11,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:11,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823598454] [2024-06-21 16:00:11,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:11,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:11,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:11,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:11,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:11,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:11,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 559 transitions, 11008 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:11,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:11,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:11,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:12,754 INFO L124 PetriNetUnfolderBase]: 2648/4518 cut-off events. [2024-06-21 16:00:12,754 INFO L125 PetriNetUnfolderBase]: For 602502/602504 co-relation queries the response was YES. [2024-06-21 16:00:12,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37991 conditions, 4518 events. 2648/4518 cut-off events. For 602502/602504 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 29677 event pairs, 441 based on Foata normal form. 1/4517 useless extension candidates. Maximal degree in co-relation 37804. Up to 3889 conditions per place. [2024-06-21 16:00:12,815 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 496 selfloop transitions, 87 changer transitions 0/591 dead transitions. [2024-06-21 16:00:12,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 591 transitions, 12910 flow [2024-06-21 16:00:12,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:00:12,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:00:12,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-21 16:00:12,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-21 16:00:12,816 INFO L175 Difference]: Start difference. First operand has 410 places, 559 transitions, 11008 flow. Second operand 10 states and 231 transitions. [2024-06-21 16:00:12,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 591 transitions, 12910 flow [2024-06-21 16:00:16,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 591 transitions, 12356 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 16:00:16,810 INFO L231 Difference]: Finished difference. Result has 415 places, 567 transitions, 10833 flow [2024-06-21 16:00:16,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10466, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10833, PETRI_PLACES=415, PETRI_TRANSITIONS=567} [2024-06-21 16:00:16,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-21 16:00:16,810 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 567 transitions, 10833 flow [2024-06-21 16:00:16,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:16,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:16,811 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] [2024-06-21 16:00:16,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 16:00:16,811 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)] === [2024-06-21 16:00:16,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:16,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1671886217, now seen corresponding path program 9 times [2024-06-21 16:00:16,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:16,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259862609] [2024-06-21 16:00:16,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:16,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:16,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:16,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259862609] [2024-06-21 16:00:16,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259862609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:16,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:16,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:16,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329805964] [2024-06-21 16:00:16,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:16,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:16,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:16,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:16,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:16,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:16,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 567 transitions, 10833 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:16,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:16,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:16,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:17,801 INFO L124 PetriNetUnfolderBase]: 2645/4512 cut-off events. [2024-06-21 16:00:17,802 INFO L125 PetriNetUnfolderBase]: For 601433/601435 co-relation queries the response was YES. [2024-06-21 16:00:17,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37457 conditions, 4512 events. 2645/4512 cut-off events. For 601433/601435 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 29629 event pairs, 440 based on Foata normal form. 1/4511 useless extension candidates. Maximal degree in co-relation 37268. Up to 3970 conditions per place. [2024-06-21 16:00:17,866 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 532 selfloop transitions, 46 changer transitions 0/586 dead transitions. [2024-06-21 16:00:17,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 586 transitions, 12275 flow [2024-06-21 16:00:17,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:17,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:17,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 16:00:17,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-21 16:00:17,867 INFO L175 Difference]: Start difference. First operand has 415 places, 567 transitions, 10833 flow. Second operand 8 states and 186 transitions. [2024-06-21 16:00:17,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 586 transitions, 12275 flow [2024-06-21 16:00:21,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 586 transitions, 12126 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 16:00:21,335 INFO L231 Difference]: Finished difference. Result has 417 places, 567 transitions, 10782 flow [2024-06-21 16:00:21,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10684, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10782, PETRI_PLACES=417, PETRI_TRANSITIONS=567} [2024-06-21 16:00:21,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-21 16:00:21,336 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 567 transitions, 10782 flow [2024-06-21 16:00:21,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:21,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:21,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:21,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 16:00:21,337 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)] === [2024-06-21 16:00:21,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:21,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1672064963, now seen corresponding path program 6 times [2024-06-21 16:00:21,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:21,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84456952] [2024-06-21 16:00:21,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:21,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:21,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:21,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84456952] [2024-06-21 16:00:21,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84456952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:21,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:21,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:21,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028234268] [2024-06-21 16:00:21,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:21,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:21,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:21,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:21,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:21,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:21,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 567 transitions, 10782 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:21,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:21,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:21,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:22,480 INFO L124 PetriNetUnfolderBase]: 2650/4521 cut-off events. [2024-06-21 16:00:22,481 INFO L125 PetriNetUnfolderBase]: For 610245/610247 co-relation queries the response was YES. [2024-06-21 16:00:22,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37637 conditions, 4521 events. 2650/4521 cut-off events. For 610245/610247 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29741 event pairs, 441 based on Foata normal form. 1/4520 useless extension candidates. Maximal degree in co-relation 37446. Up to 3891 conditions per place. [2024-06-21 16:00:22,531 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 495 selfloop transitions, 90 changer transitions 0/593 dead transitions. [2024-06-21 16:00:22,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 593 transitions, 12609 flow [2024-06-21 16:00:22,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:00:22,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:00:22,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-21 16:00:22,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-21 16:00:22,532 INFO L175 Difference]: Start difference. First operand has 417 places, 567 transitions, 10782 flow. Second operand 9 states and 212 transitions. [2024-06-21 16:00:22,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 593 transitions, 12609 flow [2024-06-21 16:00:26,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 593 transitions, 12515 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 16:00:26,636 INFO L231 Difference]: Finished difference. Result has 420 places, 571 transitions, 10996 flow [2024-06-21 16:00:26,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10688, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10996, PETRI_PLACES=420, PETRI_TRANSITIONS=571} [2024-06-21 16:00:26,636 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-21 16:00:26,636 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 571 transitions, 10996 flow [2024-06-21 16:00:26,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:26,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:26,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:26,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 16:00:26,637 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)] === [2024-06-21 16:00:26,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:26,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1671679013, now seen corresponding path program 7 times [2024-06-21 16:00:26,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:26,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752551902] [2024-06-21 16:00:26,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:26,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:26,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:26,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752551902] [2024-06-21 16:00:26,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752551902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:26,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:26,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:26,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415395929] [2024-06-21 16:00:26,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:26,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:26,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:26,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:26,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:26,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:26,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 571 transitions, 10996 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:26,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:26,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:26,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:27,683 INFO L124 PetriNetUnfolderBase]: 2647/4517 cut-off events. [2024-06-21 16:00:27,683 INFO L125 PetriNetUnfolderBase]: For 613114/613116 co-relation queries the response was YES. [2024-06-21 16:00:27,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37655 conditions, 4517 events. 2647/4517 cut-off events. For 613114/613116 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29723 event pairs, 441 based on Foata normal form. 1/4516 useless extension candidates. Maximal degree in co-relation 37463. Up to 3889 conditions per place. [2024-06-21 16:00:27,743 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 494 selfloop transitions, 90 changer transitions 0/592 dead transitions. [2024-06-21 16:00:27,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 592 transitions, 12469 flow [2024-06-21 16:00:27,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:00:27,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:00:27,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-21 16:00:27,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-21 16:00:27,744 INFO L175 Difference]: Start difference. First operand has 420 places, 571 transitions, 10996 flow. Second operand 9 states and 211 transitions. [2024-06-21 16:00:27,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 592 transitions, 12469 flow [2024-06-21 16:00:31,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 592 transitions, 12310 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 16:00:31,951 INFO L231 Difference]: Finished difference. Result has 425 places, 571 transitions, 11023 flow [2024-06-21 16:00:31,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10837, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11023, PETRI_PLACES=425, PETRI_TRANSITIONS=571} [2024-06-21 16:00:31,951 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-21 16:00:31,951 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 571 transitions, 11023 flow [2024-06-21 16:00:31,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:31,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:31,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:31,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 16:00:31,952 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)] === [2024-06-21 16:00:31,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:31,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1671678827, now seen corresponding path program 10 times [2024-06-21 16:00:31,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:31,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093364938] [2024-06-21 16:00:31,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:31,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:32,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:32,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093364938] [2024-06-21 16:00:32,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093364938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:32,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:32,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:32,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678924402] [2024-06-21 16:00:32,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:32,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:32,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:32,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:32,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:32,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:32,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 571 transitions, 11023 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:32,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:32,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:32,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:33,074 INFO L124 PetriNetUnfolderBase]: 2644/4513 cut-off events. [2024-06-21 16:00:33,074 INFO L125 PetriNetUnfolderBase]: For 614588/614590 co-relation queries the response was YES. [2024-06-21 16:00:33,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37685 conditions, 4513 events. 2644/4513 cut-off events. For 614588/614590 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29653 event pairs, 440 based on Foata normal form. 1/4512 useless extension candidates. Maximal degree in co-relation 37491. Up to 3970 conditions per place. [2024-06-21 16:00:33,136 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 536 selfloop transitions, 46 changer transitions 0/590 dead transitions. [2024-06-21 16:00:33,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 590 transitions, 12243 flow [2024-06-21 16:00:33,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:00:33,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:00:33,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-21 16:00:33,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-21 16:00:33,137 INFO L175 Difference]: Start difference. First operand has 425 places, 571 transitions, 11023 flow. Second operand 9 states and 204 transitions. [2024-06-21 16:00:33,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 590 transitions, 12243 flow [2024-06-21 16:00:37,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 590 transitions, 12051 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 16:00:37,601 INFO L231 Difference]: Finished difference. Result has 426 places, 571 transitions, 10929 flow [2024-06-21 16:00:37,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10831, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10929, PETRI_PLACES=426, PETRI_TRANSITIONS=571} [2024-06-21 16:00:37,602 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-21 16:00:37,602 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 571 transitions, 10929 flow [2024-06-21 16:00:37,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:37,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:37,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:37,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 16:00:37,602 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)] === [2024-06-21 16:00:37,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:37,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1931917797, now seen corresponding path program 3 times [2024-06-21 16:00:37,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:37,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676243548] [2024-06-21 16:00:37,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:37,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:37,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:37,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:37,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676243548] [2024-06-21 16:00:37,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676243548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:37,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:37,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:37,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806596093] [2024-06-21 16:00:37,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:37,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:37,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:37,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:37,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:37,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:37,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 571 transitions, 10929 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:37,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:37,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:37,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:38,726 INFO L124 PetriNetUnfolderBase]: 2672/4561 cut-off events. [2024-06-21 16:00:38,727 INFO L125 PetriNetUnfolderBase]: For 659045/659047 co-relation queries the response was YES. [2024-06-21 16:00:38,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37944 conditions, 4561 events. 2672/4561 cut-off events. For 659045/659047 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 30055 event pairs, 441 based on Foata normal form. 6/4565 useless extension candidates. Maximal degree in co-relation 37749. Up to 3947 conditions per place. [2024-06-21 16:00:38,793 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 545 selfloop transitions, 48 changer transitions 0/601 dead transitions. [2024-06-21 16:00:38,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 601 transitions, 12302 flow [2024-06-21 16:00:38,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:38,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:38,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 16:00:38,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-21 16:00:38,794 INFO L175 Difference]: Start difference. First operand has 426 places, 571 transitions, 10929 flow. Second operand 8 states and 191 transitions. [2024-06-21 16:00:38,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 601 transitions, 12302 flow [2024-06-21 16:00:43,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 601 transitions, 12200 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:00:43,441 INFO L231 Difference]: Finished difference. Result has 428 places, 575 transitions, 11016 flow [2024-06-21 16:00:43,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10829, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11016, PETRI_PLACES=428, PETRI_TRANSITIONS=575} [2024-06-21 16:00:43,442 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-21 16:00:43,442 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 575 transitions, 11016 flow [2024-06-21 16:00:43,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:43,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:43,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:43,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 16:00:43,442 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)] === [2024-06-21 16:00:43,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:43,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1165920153, now seen corresponding path program 1 times [2024-06-21 16:00:43,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:43,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017589749] [2024-06-21 16:00:43,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:43,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:43,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:43,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017589749] [2024-06-21 16:00:43,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017589749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:43,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:43,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:43,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4556781] [2024-06-21 16:00:43,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:43,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:43,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:43,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:43,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:43,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:43,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 575 transitions, 11016 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:43,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:43,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:43,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:44,500 INFO L124 PetriNetUnfolderBase]: 2693/4588 cut-off events. [2024-06-21 16:00:44,501 INFO L125 PetriNetUnfolderBase]: For 660293/660299 co-relation queries the response was YES. [2024-06-21 16:00:44,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38542 conditions, 4588 events. 2693/4588 cut-off events. For 660293/660299 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 30253 event pairs, 462 based on Foata normal form. 3/4585 useless extension candidates. Maximal degree in co-relation 38344. Up to 3891 conditions per place. [2024-06-21 16:00:44,563 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 502 selfloop transitions, 97 changer transitions 0/607 dead transitions. [2024-06-21 16:00:44,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 607 transitions, 12592 flow [2024-06-21 16:00:44,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:00:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:00:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 16:00:44,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 16:00:44,564 INFO L175 Difference]: Start difference. First operand has 428 places, 575 transitions, 11016 flow. Second operand 7 states and 175 transitions. [2024-06-21 16:00:44,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 607 transitions, 12592 flow [2024-06-21 16:00:48,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 607 transitions, 12497 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 16:00:48,858 INFO L231 Difference]: Finished difference. Result has 432 places, 579 transitions, 11172 flow [2024-06-21 16:00:48,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10921, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11172, PETRI_PLACES=432, PETRI_TRANSITIONS=579} [2024-06-21 16:00:48,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-21 16:00:48,859 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 579 transitions, 11172 flow [2024-06-21 16:00:48,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:48,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:48,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:48,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 16:00:48,859 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)] === [2024-06-21 16:00:48,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:48,860 INFO L85 PathProgramCache]: Analyzing trace with hash 86323003, now seen corresponding path program 2 times [2024-06-21 16:00:48,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:48,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579024424] [2024-06-21 16:00:48,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:48,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:48,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:48,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:48,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579024424] [2024-06-21 16:00:48,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579024424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:48,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:48,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:48,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091544621] [2024-06-21 16:00:48,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:48,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:48,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:48,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:48,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:48,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:48,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 579 transitions, 11172 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:48,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:48,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:48,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:49,995 INFO L124 PetriNetUnfolderBase]: 2701/4607 cut-off events. [2024-06-21 16:00:49,996 INFO L125 PetriNetUnfolderBase]: For 671030/671036 co-relation queries the response was YES. [2024-06-21 16:00:50,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38845 conditions, 4607 events. 2701/4607 cut-off events. For 671030/671036 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 30449 event pairs, 471 based on Foata normal form. 3/4606 useless extension candidates. Maximal degree in co-relation 38646. Up to 3950 conditions per place. [2024-06-21 16:00:50,055 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 500 selfloop transitions, 96 changer transitions 0/604 dead transitions. [2024-06-21 16:00:50,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 604 transitions, 12468 flow [2024-06-21 16:00:50,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:00:50,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:00:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 16:00:50,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-21 16:00:50,056 INFO L175 Difference]: Start difference. First operand has 432 places, 579 transitions, 11172 flow. Second operand 7 states and 170 transitions. [2024-06-21 16:00:50,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 604 transitions, 12468 flow [2024-06-21 16:00:53,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 604 transitions, 12314 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 16:00:53,700 INFO L231 Difference]: Finished difference. Result has 436 places, 581 transitions, 11247 flow [2024-06-21 16:00:53,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11030, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11247, PETRI_PLACES=436, PETRI_TRANSITIONS=581} [2024-06-21 16:00:53,701 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-21 16:00:53,701 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 581 transitions, 11247 flow [2024-06-21 16:00:53,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:53,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:53,701 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] [2024-06-21 16:00:53,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 16:00:53,701 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)] === [2024-06-21 16:00:53,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:53,702 INFO L85 PathProgramCache]: Analyzing trace with hash 2031529767, now seen corresponding path program 3 times [2024-06-21 16:00:53,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:53,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416057078] [2024-06-21 16:00:53,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:53,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:53,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:53,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416057078] [2024-06-21 16:00:53,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416057078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:53,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:53,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:53,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107511427] [2024-06-21 16:00:53,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:53,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:53,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:53,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:53,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:53,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:53,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 581 transitions, 11247 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:53,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:53,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:53,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:54,783 INFO L124 PetriNetUnfolderBase]: 2709/4612 cut-off events. [2024-06-21 16:00:54,783 INFO L125 PetriNetUnfolderBase]: For 679815/679823 co-relation queries the response was YES. [2024-06-21 16:00:54,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39098 conditions, 4612 events. 2709/4612 cut-off events. For 679815/679823 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 30452 event pairs, 468 based on Foata normal form. 3/4610 useless extension candidates. Maximal degree in co-relation 38897. Up to 3962 conditions per place. [2024-06-21 16:00:54,848 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 506 selfloop transitions, 93 changer transitions 0/607 dead transitions. [2024-06-21 16:00:54,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 607 transitions, 12543 flow [2024-06-21 16:00:54,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:54,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:54,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 16:00:54,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-21 16:00:54,850 INFO L175 Difference]: Start difference. First operand has 436 places, 581 transitions, 11247 flow. Second operand 8 states and 189 transitions. [2024-06-21 16:00:54,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 607 transitions, 12543 flow [2024-06-21 16:00:59,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 607 transitions, 12379 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 16:00:59,342 INFO L231 Difference]: Finished difference. Result has 440 places, 583 transitions, 11298 flow [2024-06-21 16:00:59,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11083, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11298, PETRI_PLACES=440, PETRI_TRANSITIONS=583} [2024-06-21 16:00:59,343 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-21 16:00:59,343 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 583 transitions, 11298 flow [2024-06-21 16:00:59,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:59,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:59,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:59,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 16:00:59,344 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)] === [2024-06-21 16:00:59,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:59,344 INFO L85 PathProgramCache]: Analyzing trace with hash -965711339, now seen corresponding path program 1 times [2024-06-21 16:00:59,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:59,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618179853] [2024-06-21 16:00:59,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:59,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:59,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:59,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618179853] [2024-06-21 16:00:59,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618179853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:59,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:59,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:59,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788862400] [2024-06-21 16:00:59,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:59,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:59,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:59,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:59,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:59,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:00:59,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 583 transitions, 11298 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:59,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:59,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:00:59,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:00,443 INFO L124 PetriNetUnfolderBase]: 2717/4624 cut-off events. [2024-06-21 16:01:00,444 INFO L125 PetriNetUnfolderBase]: For 691768/691776 co-relation queries the response was YES. [2024-06-21 16:01:00,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39360 conditions, 4624 events. 2717/4624 cut-off events. For 691768/691776 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 30454 event pairs, 475 based on Foata normal form. 3/4622 useless extension candidates. Maximal degree in co-relation 39158. Up to 3836 conditions per place. [2024-06-21 16:01:00,507 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 413 selfloop transitions, 188 changer transitions 0/609 dead transitions. [2024-06-21 16:01:00,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 609 transitions, 12644 flow [2024-06-21 16:01:00,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:01:00,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:01:00,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 16:01:00,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 16:01:00,509 INFO L175 Difference]: Start difference. First operand has 440 places, 583 transitions, 11298 flow. Second operand 8 states and 192 transitions. [2024-06-21 16:01:00,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 609 transitions, 12644 flow [2024-06-21 16:01:05,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 609 transitions, 12464 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 16:01:05,337 INFO L231 Difference]: Finished difference. Result has 443 places, 585 transitions, 11569 flow [2024-06-21 16:01:05,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11118, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11569, PETRI_PLACES=443, PETRI_TRANSITIONS=585} [2024-06-21 16:01:05,337 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-21 16:01:05,337 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 585 transitions, 11569 flow [2024-06-21 16:01:05,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:05,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:05,338 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] [2024-06-21 16:01:05,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 16:01:05,338 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)] === [2024-06-21 16:01:05,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:05,338 INFO L85 PathProgramCache]: Analyzing trace with hash -800256903, now seen corresponding path program 4 times [2024-06-21 16:01:05,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:05,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016653801] [2024-06-21 16:01:05,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:05,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:05,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:05,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016653801] [2024-06-21 16:01:05,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016653801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:05,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:05,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:05,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281419482] [2024-06-21 16:01:05,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:05,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:05,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:05,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:05,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:05,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:05,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 585 transitions, 11569 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:05,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:05,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:05,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:06,587 INFO L124 PetriNetUnfolderBase]: 2753/4686 cut-off events. [2024-06-21 16:01:06,588 INFO L125 PetriNetUnfolderBase]: For 699988/699990 co-relation queries the response was YES. [2024-06-21 16:01:06,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39971 conditions, 4686 events. 2753/4686 cut-off events. For 699988/699990 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 30924 event pairs, 451 based on Foata normal form. 2/4686 useless extension candidates. Maximal degree in co-relation 39768. Up to 4108 conditions per place. [2024-06-21 16:01:06,650 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 561 selfloop transitions, 41 changer transitions 0/610 dead transitions. [2024-06-21 16:01:06,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 610 transitions, 12890 flow [2024-06-21 16:01:06,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:01:06,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:01:06,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 16:01:06,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-21 16:01:06,651 INFO L175 Difference]: Start difference. First operand has 443 places, 585 transitions, 11569 flow. Second operand 8 states and 188 transitions. [2024-06-21 16:01:06,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 610 transitions, 12890 flow [2024-06-21 16:01:11,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 610 transitions, 12471 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 16:01:11,363 INFO L231 Difference]: Finished difference. Result has 445 places, 588 transitions, 11279 flow [2024-06-21 16:01:11,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11150, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11279, PETRI_PLACES=445, PETRI_TRANSITIONS=588} [2024-06-21 16:01:11,364 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-21 16:01:11,364 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 588 transitions, 11279 flow [2024-06-21 16:01:11,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:11,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:11,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:11,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 16:01:11,364 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)] === [2024-06-21 16:01:11,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:11,365 INFO L85 PathProgramCache]: Analyzing trace with hash -881948191, now seen corresponding path program 2 times [2024-06-21 16:01:11,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:11,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768271259] [2024-06-21 16:01:11,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:11,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:11,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:11,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768271259] [2024-06-21 16:01:11,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768271259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:11,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:11,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:11,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409695622] [2024-06-21 16:01:11,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:11,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:11,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:11,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:11,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:11,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:11,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 588 transitions, 11279 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:11,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:11,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:11,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:12,515 INFO L124 PetriNetUnfolderBase]: 2789/4742 cut-off events. [2024-06-21 16:01:12,515 INFO L125 PetriNetUnfolderBase]: For 776453/776455 co-relation queries the response was YES. [2024-06-21 16:01:12,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40383 conditions, 4742 events. 2789/4742 cut-off events. For 776453/776455 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 31290 event pairs, 456 based on Foata normal form. 10/4750 useless extension candidates. Maximal degree in co-relation 40179. Up to 4106 conditions per place. [2024-06-21 16:01:12,583 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 527 selfloop transitions, 78 changer transitions 0/613 dead transitions. [2024-06-21 16:01:12,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 613 transitions, 12649 flow [2024-06-21 16:01:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:01:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:01:12,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-21 16:01:12,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-21 16:01:12,584 INFO L175 Difference]: Start difference. First operand has 445 places, 588 transitions, 11279 flow. Second operand 9 states and 213 transitions. [2024-06-21 16:01:12,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 613 transitions, 12649 flow [2024-06-21 16:01:16,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 613 transitions, 12557 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 16:01:16,560 INFO L231 Difference]: Finished difference. Result has 448 places, 590 transitions, 11424 flow [2024-06-21 16:01:16,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11187, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11424, PETRI_PLACES=448, PETRI_TRANSITIONS=590} [2024-06-21 16:01:16,561 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-21 16:01:16,561 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 590 transitions, 11424 flow [2024-06-21 16:01:16,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:16,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:16,561 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] [2024-06-21 16:01:16,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 16:01:16,562 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)] === [2024-06-21 16:01:16,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:16,562 INFO L85 PathProgramCache]: Analyzing trace with hash -36619739, now seen corresponding path program 3 times [2024-06-21 16:01:16,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:16,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498024306] [2024-06-21 16:01:16,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:16,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:16,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:16,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498024306] [2024-06-21 16:01:16,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498024306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:16,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:16,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:16,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330389060] [2024-06-21 16:01:16,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:16,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:16,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:16,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:16,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:16,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:16,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 590 transitions, 11424 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:16,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:16,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:16,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:17,797 INFO L124 PetriNetUnfolderBase]: 2825/4796 cut-off events. [2024-06-21 16:01:17,797 INFO L125 PetriNetUnfolderBase]: For 796091/796093 co-relation queries the response was YES. [2024-06-21 16:01:17,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41360 conditions, 4796 events. 2825/4796 cut-off events. For 796091/796093 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 31655 event pairs, 462 based on Foata normal form. 10/4804 useless extension candidates. Maximal degree in co-relation 41155. Up to 4162 conditions per place. [2024-06-21 16:01:17,867 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 530 selfloop transitions, 78 changer transitions 0/616 dead transitions. [2024-06-21 16:01:17,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 616 transitions, 12806 flow [2024-06-21 16:01:17,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:01:17,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:01:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-21 16:01:17,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-21 16:01:17,869 INFO L175 Difference]: Start difference. First operand has 448 places, 590 transitions, 11424 flow. Second operand 10 states and 232 transitions. [2024-06-21 16:01:17,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 616 transitions, 12806 flow [2024-06-21 16:01:22,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 616 transitions, 12595 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 16:01:22,959 INFO L231 Difference]: Finished difference. Result has 451 places, 592 transitions, 11454 flow [2024-06-21 16:01:22,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11213, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11454, PETRI_PLACES=451, PETRI_TRANSITIONS=592} [2024-06-21 16:01:22,959 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-21 16:01:22,959 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 592 transitions, 11454 flow [2024-06-21 16:01:22,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:22,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:22,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:22,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 16:01:22,960 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)] === [2024-06-21 16:01:22,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:22,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1547344073, now seen corresponding path program 4 times [2024-06-21 16:01:22,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:22,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999277087] [2024-06-21 16:01:22,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:22,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:23,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:23,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999277087] [2024-06-21 16:01:23,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999277087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:23,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:23,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:23,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532290868] [2024-06-21 16:01:23,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:23,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:23,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:23,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:23,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:23,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:23,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 592 transitions, 11454 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:23,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:23,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:23,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:24,350 INFO L124 PetriNetUnfolderBase]: 3034/5141 cut-off events. [2024-06-21 16:01:24,350 INFO L125 PetriNetUnfolderBase]: For 1064436/1064438 co-relation queries the response was YES. [2024-06-21 16:01:24,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47385 conditions, 5141 events. 3034/5141 cut-off events. For 1064436/1064438 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 34099 event pairs, 559 based on Foata normal form. 10/5149 useless extension candidates. Maximal degree in co-relation 47179. Up to 3986 conditions per place. [2024-06-21 16:01:24,423 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 537 selfloop transitions, 82 changer transitions 0/627 dead transitions. [2024-06-21 16:01:24,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 627 transitions, 13198 flow [2024-06-21 16:01:24,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:01:24,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:01:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-21 16:01:24,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804878048780487 [2024-06-21 16:01:24,424 INFO L175 Difference]: Start difference. First operand has 451 places, 592 transitions, 11454 flow. Second operand 10 states and 238 transitions. [2024-06-21 16:01:24,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 627 transitions, 13198 flow [2024-06-21 16:01:30,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 627 transitions, 12983 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-21 16:01:30,513 INFO L231 Difference]: Finished difference. Result has 454 places, 596 transitions, 11556 flow [2024-06-21 16:01:30,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11239, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11556, PETRI_PLACES=454, PETRI_TRANSITIONS=596} [2024-06-21 16:01:30,513 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-21 16:01:30,514 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 596 transitions, 11556 flow [2024-06-21 16:01:30,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:30,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:30,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:30,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 16:01:30,514 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)] === [2024-06-21 16:01:30,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:30,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1585735447, now seen corresponding path program 11 times [2024-06-21 16:01:30,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:30,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288939518] [2024-06-21 16:01:30,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:30,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:30,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:30,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288939518] [2024-06-21 16:01:30,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288939518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:30,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:30,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:30,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761280349] [2024-06-21 16:01:30,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:30,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:30,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:30,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:30,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:30,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:30,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 596 transitions, 11556 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:30,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:30,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:30,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:31,875 INFO L124 PetriNetUnfolderBase]: 3039/5131 cut-off events. [2024-06-21 16:01:31,876 INFO L125 PetriNetUnfolderBase]: For 1031829/1031835 co-relation queries the response was YES. [2024-06-21 16:01:31,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47300 conditions, 5131 events. 3039/5131 cut-off events. For 1031829/1031835 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 34016 event pairs, 623 based on Foata normal form. 5/5117 useless extension candidates. Maximal degree in co-relation 47092. Up to 4172 conditions per place. [2024-06-21 16:01:31,938 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 402 selfloop transitions, 212 changer transitions 0/622 dead transitions. [2024-06-21 16:01:31,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 622 transitions, 13439 flow [2024-06-21 16:01:31,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:31,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:31,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 16:01:31,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-21 16:01:31,939 INFO L175 Difference]: Start difference. First operand has 454 places, 596 transitions, 11556 flow. Second operand 7 states and 174 transitions. [2024-06-21 16:01:31,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 622 transitions, 13439 flow [2024-06-21 16:01:38,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 622 transitions, 13274 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 16:01:38,799 INFO L231 Difference]: Finished difference. Result has 455 places, 599 transitions, 11891 flow [2024-06-21 16:01:38,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11391, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11891, PETRI_PLACES=455, PETRI_TRANSITIONS=599} [2024-06-21 16:01:38,800 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-21 16:01:38,800 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 599 transitions, 11891 flow [2024-06-21 16:01:38,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:38,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:38,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:38,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 16:01:38,801 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)] === [2024-06-21 16:01:38,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:38,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1012634751, now seen corresponding path program 12 times [2024-06-21 16:01:38,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:38,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774854631] [2024-06-21 16:01:38,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:38,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:38,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:38,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774854631] [2024-06-21 16:01:38,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774854631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:38,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:38,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:38,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60969797] [2024-06-21 16:01:38,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:38,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:38,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:38,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:38,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:38,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:38,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 599 transitions, 11891 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:38,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:38,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:38,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:40,039 INFO L124 PetriNetUnfolderBase]: 3044/5156 cut-off events. [2024-06-21 16:01:40,040 INFO L125 PetriNetUnfolderBase]: For 1042348/1042354 co-relation queries the response was YES. [2024-06-21 16:01:40,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47443 conditions, 5156 events. 3044/5156 cut-off events. For 1042348/1042354 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 34305 event pairs, 635 based on Foata normal form. 5/5142 useless extension candidates. Maximal degree in co-relation 47233. Up to 4178 conditions per place. [2024-06-21 16:01:40,115 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 402 selfloop transitions, 212 changer transitions 0/622 dead transitions. [2024-06-21 16:01:40,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 622 transitions, 13772 flow [2024-06-21 16:01:40,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:40,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:40,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 16:01:40,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-21 16:01:40,117 INFO L175 Difference]: Start difference. First operand has 455 places, 599 transitions, 11891 flow. Second operand 7 states and 172 transitions. [2024-06-21 16:01:40,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 622 transitions, 13772 flow [2024-06-21 16:01:47,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 622 transitions, 12987 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 16:01:47,102 INFO L231 Difference]: Finished difference. Result has 456 places, 602 transitions, 11611 flow [2024-06-21 16:01:47,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11137, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11611, PETRI_PLACES=456, PETRI_TRANSITIONS=602} [2024-06-21 16:01:47,103 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-21 16:01:47,103 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 602 transitions, 11611 flow [2024-06-21 16:01:47,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:47,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:47,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:47,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 16:01:47,103 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)] === [2024-06-21 16:01:47,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:47,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1171247207, now seen corresponding path program 13 times [2024-06-21 16:01:47,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:47,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145480395] [2024-06-21 16:01:47,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:47,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:47,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:47,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145480395] [2024-06-21 16:01:47,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145480395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:47,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:47,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:47,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692419791] [2024-06-21 16:01:47,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:47,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:47,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:47,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:47,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:47,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:47,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 602 transitions, 11611 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:47,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:47,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:47,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:48,322 INFO L124 PetriNetUnfolderBase]: 3049/5167 cut-off events. [2024-06-21 16:01:48,322 INFO L125 PetriNetUnfolderBase]: For 1049965/1049971 co-relation queries the response was YES. [2024-06-21 16:01:48,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47398 conditions, 5167 events. 3049/5167 cut-off events. For 1049965/1049971 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 34428 event pairs, 635 based on Foata normal form. 5/5153 useless extension candidates. Maximal degree in co-relation 47188. Up to 4184 conditions per place. [2024-06-21 16:01:48,396 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 386 selfloop transitions, 228 changer transitions 0/622 dead transitions. [2024-06-21 16:01:48,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 622 transitions, 13459 flow [2024-06-21 16:01:48,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:48,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:48,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 16:01:48,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 16:01:48,397 INFO L175 Difference]: Start difference. First operand has 456 places, 602 transitions, 11611 flow. Second operand 7 states and 168 transitions. [2024-06-21 16:01:48,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 622 transitions, 13459 flow [2024-06-21 16:01:54,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 622 transitions, 13048 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 16:01:54,516 INFO L231 Difference]: Finished difference. Result has 459 places, 605 transitions, 11712 flow [2024-06-21 16:01:54,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11203, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11712, PETRI_PLACES=459, PETRI_TRANSITIONS=605} [2024-06-21 16:01:54,517 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-21 16:01:54,517 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 605 transitions, 11712 flow [2024-06-21 16:01:54,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:54,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:54,517 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] [2024-06-21 16:01:54,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 16:01:54,518 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)] === [2024-06-21 16:01:54,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:54,518 INFO L85 PathProgramCache]: Analyzing trace with hash -513686907, now seen corresponding path program 14 times [2024-06-21 16:01:54,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:54,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465497960] [2024-06-21 16:01:54,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:54,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:54,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:54,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465497960] [2024-06-21 16:01:54,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465497960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:54,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:54,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:54,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888750658] [2024-06-21 16:01:54,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:54,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:54,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:54,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:54,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:54,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:01:54,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 605 transitions, 11712 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:54,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:54,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:01:54,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:55,917 INFO L124 PetriNetUnfolderBase]: 3046/5144 cut-off events. [2024-06-21 16:01:55,917 INFO L125 PetriNetUnfolderBase]: For 1054171/1054171 co-relation queries the response was YES. [2024-06-21 16:01:55,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47359 conditions, 5144 events. 3046/5144 cut-off events. For 1054171/1054171 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 34147 event pairs, 653 based on Foata normal form. 1/5108 useless extension candidates. Maximal degree in co-relation 47148. Up to 4181 conditions per place. [2024-06-21 16:01:55,997 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 398 selfloop transitions, 226 changer transitions 0/632 dead transitions. [2024-06-21 16:01:55,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 632 transitions, 13572 flow [2024-06-21 16:01:55,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:01:55,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:01:55,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 16:01:55,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-21 16:01:55,998 INFO L175 Difference]: Start difference. First operand has 459 places, 605 transitions, 11712 flow. Second operand 8 states and 197 transitions. [2024-06-21 16:01:55,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 632 transitions, 13572 flow [2024-06-21 16:02:02,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 632 transitions, 13249 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 16:02:02,410 INFO L231 Difference]: Finished difference. Result has 463 places, 605 transitions, 11849 flow [2024-06-21 16:02:02,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11389, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11849, PETRI_PLACES=463, PETRI_TRANSITIONS=605} [2024-06-21 16:02:02,411 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-21 16:02:02,411 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 605 transitions, 11849 flow [2024-06-21 16:02:02,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:02,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:02,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:02,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 16:02:02,411 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)] === [2024-06-21 16:02:02,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:02,412 INFO L85 PathProgramCache]: Analyzing trace with hash 547036197, now seen corresponding path program 8 times [2024-06-21 16:02:02,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:02,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266271495] [2024-06-21 16:02:02,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:02,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:02,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:02,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266271495] [2024-06-21 16:02:02,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266271495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:02,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:02,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:02,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389778343] [2024-06-21 16:02:02,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:02,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:02,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:02,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:02,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:02,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:02,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 605 transitions, 11849 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:02,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:02,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:02,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:03,630 INFO L124 PetriNetUnfolderBase]: 3051/5132 cut-off events. [2024-06-21 16:02:03,631 INFO L125 PetriNetUnfolderBase]: For 1074101/1074101 co-relation queries the response was YES. [2024-06-21 16:02:03,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47666 conditions, 5132 events. 3051/5132 cut-off events. For 1074101/1074101 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 33894 event pairs, 687 based on Foata normal form. 1/5084 useless extension candidates. Maximal degree in co-relation 47454. Up to 3824 conditions per place. [2024-06-21 16:02:03,711 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 338 changer transitions 0/636 dead transitions. [2024-06-21 16:02:03,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 636 transitions, 14183 flow [2024-06-21 16:02:03,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:03,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:03,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 16:02:03,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-21 16:02:03,713 INFO L175 Difference]: Start difference. First operand has 463 places, 605 transitions, 11849 flow. Second operand 8 states and 198 transitions. [2024-06-21 16:02:03,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 636 transitions, 14183 flow [2024-06-21 16:02:09,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 636 transitions, 13346 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-06-21 16:02:09,884 INFO L231 Difference]: Finished difference. Result has 461 places, 611 transitions, 11904 flow [2024-06-21 16:02:09,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11012, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11904, PETRI_PLACES=461, PETRI_TRANSITIONS=611} [2024-06-21 16:02:09,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-21 16:02:09,885 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 611 transitions, 11904 flow [2024-06-21 16:02:09,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:09,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:09,885 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] [2024-06-21 16:02:09,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 16:02:09,885 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)] === [2024-06-21 16:02:09,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:09,886 INFO L85 PathProgramCache]: Analyzing trace with hash 2135945275, now seen corresponding path program 15 times [2024-06-21 16:02:09,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:09,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019910341] [2024-06-21 16:02:09,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:09,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:09,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:09,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019910341] [2024-06-21 16:02:09,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019910341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:09,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:09,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:09,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072614409] [2024-06-21 16:02:09,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:09,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:09,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:09,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:09,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:09,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:09,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 611 transitions, 11904 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:09,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:09,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:09,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:11,194 INFO L124 PetriNetUnfolderBase]: 3056/5154 cut-off events. [2024-06-21 16:02:11,194 INFO L125 PetriNetUnfolderBase]: For 1084505/1084505 co-relation queries the response was YES. [2024-06-21 16:02:11,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47714 conditions, 5154 events. 3056/5154 cut-off events. For 1084505/1084505 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 34184 event pairs, 657 based on Foata normal form. 1/5111 useless extension candidates. Maximal degree in co-relation 47503. Up to 4194 conditions per place. [2024-06-21 16:02:11,263 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 401 selfloop transitions, 228 changer transitions 0/637 dead transitions. [2024-06-21 16:02:11,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 637 transitions, 13553 flow [2024-06-21 16:02:11,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:11,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 16:02:11,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 16:02:11,265 INFO L175 Difference]: Start difference. First operand has 461 places, 611 transitions, 11904 flow. Second operand 8 states and 192 transitions. [2024-06-21 16:02:11,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 637 transitions, 13553 flow [2024-06-21 16:02:17,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 637 transitions, 13009 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-21 16:02:17,753 INFO L231 Difference]: Finished difference. Result has 463 places, 614 transitions, 11873 flow [2024-06-21 16:02:17,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11360, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11873, PETRI_PLACES=463, PETRI_TRANSITIONS=614} [2024-06-21 16:02:17,754 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-21 16:02:17,754 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 614 transitions, 11873 flow [2024-06-21 16:02:17,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:17,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:17,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:17,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 16:02:17,755 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)] === [2024-06-21 16:02:17,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:17,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1150937097, now seen corresponding path program 9 times [2024-06-21 16:02:17,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:17,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63899477] [2024-06-21 16:02:17,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:17,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:17,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:17,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63899477] [2024-06-21 16:02:17,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63899477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:17,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:17,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:17,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441987451] [2024-06-21 16:02:17,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:17,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:17,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:17,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:17,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:17,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:17,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 614 transitions, 11873 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:17,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:17,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:17,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:19,126 INFO L124 PetriNetUnfolderBase]: 3069/5174 cut-off events. [2024-06-21 16:02:19,127 INFO L125 PetriNetUnfolderBase]: For 1108773/1108773 co-relation queries the response was YES. [2024-06-21 16:02:19,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47878 conditions, 5174 events. 3069/5174 cut-off events. For 1108773/1108773 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 34300 event pairs, 698 based on Foata normal form. 1/5125 useless extension candidates. Maximal degree in co-relation 47667. Up to 3838 conditions per place. [2024-06-21 16:02:19,189 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 340 changer transitions 0/643 dead transitions. [2024-06-21 16:02:19,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 643 transitions, 14431 flow [2024-06-21 16:02:19,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:19,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:19,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 16:02:19,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-21 16:02:19,190 INFO L175 Difference]: Start difference. First operand has 463 places, 614 transitions, 11873 flow. Second operand 8 states and 198 transitions. [2024-06-21 16:02:19,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 643 transitions, 14431 flow [2024-06-21 16:02:26,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 643 transitions, 14141 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 16:02:26,761 INFO L231 Difference]: Finished difference. Result has 466 places, 620 transitions, 12417 flow [2024-06-21 16:02:26,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11583, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12417, PETRI_PLACES=466, PETRI_TRANSITIONS=620} [2024-06-21 16:02:26,762 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-21 16:02:26,762 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 620 transitions, 12417 flow [2024-06-21 16:02:26,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:26,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:26,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:26,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 16:02:26,762 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)] === [2024-06-21 16:02:26,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:26,762 INFO L85 PathProgramCache]: Analyzing trace with hash -681981893, now seen corresponding path program 16 times [2024-06-21 16:02:26,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:26,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112020527] [2024-06-21 16:02:26,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:26,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:26,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:26,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112020527] [2024-06-21 16:02:26,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112020527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:26,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:26,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:26,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233726837] [2024-06-21 16:02:26,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:26,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:26,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:26,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:26,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:26,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:26,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 620 transitions, 12417 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:26,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:26,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:26,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:28,048 INFO L124 PetriNetUnfolderBase]: 3074/5184 cut-off events. [2024-06-21 16:02:28,048 INFO L125 PetriNetUnfolderBase]: For 1130050/1130050 co-relation queries the response was YES. [2024-06-21 16:02:28,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48369 conditions, 5184 events. 3074/5184 cut-off events. For 1130050/1130050 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 34416 event pairs, 658 based on Foata normal form. 1/5140 useless extension candidates. Maximal degree in co-relation 48156. Up to 4218 conditions per place. [2024-06-21 16:02:28,122 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 406 selfloop transitions, 229 changer transitions 0/643 dead transitions. [2024-06-21 16:02:28,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 643 transitions, 14077 flow [2024-06-21 16:02:28,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:28,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:28,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 16:02:28,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-21 16:02:28,123 INFO L175 Difference]: Start difference. First operand has 466 places, 620 transitions, 12417 flow. Second operand 8 states and 190 transitions. [2024-06-21 16:02:28,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 643 transitions, 14077 flow [2024-06-21 16:02:35,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 643 transitions, 13379 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 16:02:35,583 INFO L231 Difference]: Finished difference. Result has 470 places, 623 transitions, 12241 flow [2024-06-21 16:02:35,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11723, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12241, PETRI_PLACES=470, PETRI_TRANSITIONS=623} [2024-06-21 16:02:35,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-21 16:02:35,584 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 623 transitions, 12241 flow [2024-06-21 16:02:35,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:35,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:35,584 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] [2024-06-21 16:02:35,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 16:02:35,584 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)] === [2024-06-21 16:02:35,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:35,585 INFO L85 PathProgramCache]: Analyzing trace with hash -676654853, now seen corresponding path program 17 times [2024-06-21 16:02:35,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:35,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950549876] [2024-06-21 16:02:35,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:35,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:35,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:35,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:35,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950549876] [2024-06-21 16:02:35,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950549876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:35,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:35,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:35,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808006881] [2024-06-21 16:02:35,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:35,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:35,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:35,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:35,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:35,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:35,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 623 transitions, 12241 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:35,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:35,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:35,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:36,885 INFO L124 PetriNetUnfolderBase]: 3079/5187 cut-off events. [2024-06-21 16:02:36,886 INFO L125 PetriNetUnfolderBase]: For 1143965/1143965 co-relation queries the response was YES. [2024-06-21 16:02:36,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48268 conditions, 5187 events. 3079/5187 cut-off events. For 1143965/1143965 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 34412 event pairs, 648 based on Foata normal form. 1/5145 useless extension candidates. Maximal degree in co-relation 48054. Up to 4224 conditions per place. [2024-06-21 16:02:36,965 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 406 selfloop transitions, 232 changer transitions 0/646 dead transitions. [2024-06-21 16:02:36,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 646 transitions, 13911 flow [2024-06-21 16:02:36,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:36,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:36,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 16:02:36,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-21 16:02:36,967 INFO L175 Difference]: Start difference. First operand has 470 places, 623 transitions, 12241 flow. Second operand 8 states and 191 transitions. [2024-06-21 16:02:36,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 646 transitions, 13911 flow [2024-06-21 16:02:43,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 646 transitions, 13621 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 16:02:43,016 INFO L231 Difference]: Finished difference. Result has 473 places, 626 transitions, 12481 flow [2024-06-21 16:02:43,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11954, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12481, PETRI_PLACES=473, PETRI_TRANSITIONS=626} [2024-06-21 16:02:43,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-21 16:02:43,017 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 626 transitions, 12481 flow [2024-06-21 16:02:43,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:43,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:43,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:43,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 16:02:43,018 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)] === [2024-06-21 16:02:43,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:43,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1151323047, now seen corresponding path program 10 times [2024-06-21 16:02:43,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:43,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448090356] [2024-06-21 16:02:43,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:43,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:43,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:43,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448090356] [2024-06-21 16:02:43,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448090356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:43,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:43,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:43,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300829332] [2024-06-21 16:02:43,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:43,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:43,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:43,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:43,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:43,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:43,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 626 transitions, 12481 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:43,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:43,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:43,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:44,272 INFO L124 PetriNetUnfolderBase]: 3076/5185 cut-off events. [2024-06-21 16:02:44,272 INFO L125 PetriNetUnfolderBase]: For 1155667/1155667 co-relation queries the response was YES. [2024-06-21 16:02:44,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48285 conditions, 5185 events. 3076/5185 cut-off events. For 1155667/1155667 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 34399 event pairs, 700 based on Foata normal form. 1/5135 useless extension candidates. Maximal degree in co-relation 48069. Up to 3844 conditions per place. [2024-06-21 16:02:44,348 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 345 changer transitions 0/648 dead transitions. [2024-06-21 16:02:44,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 648 transitions, 14649 flow [2024-06-21 16:02:44,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:44,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:44,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 16:02:44,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-21 16:02:44,349 INFO L175 Difference]: Start difference. First operand has 473 places, 626 transitions, 12481 flow. Second operand 8 states and 196 transitions. [2024-06-21 16:02:44,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 648 transitions, 14649 flow [2024-06-21 16:02:51,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 648 transitions, 13931 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 16:02:51,261 INFO L231 Difference]: Finished difference. Result has 474 places, 626 transitions, 12459 flow [2024-06-21 16:02:51,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11763, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12459, PETRI_PLACES=474, PETRI_TRANSITIONS=626} [2024-06-21 16:02:51,261 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-21 16:02:51,262 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 626 transitions, 12459 flow [2024-06-21 16:02:51,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:51,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:51,262 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] [2024-06-21 16:02:51,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 16:02:51,262 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)] === [2024-06-21 16:02:51,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:51,262 INFO L85 PathProgramCache]: Analyzing trace with hash 642647433, now seen corresponding path program 11 times [2024-06-21 16:02:51,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:51,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678257507] [2024-06-21 16:02:51,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:51,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:51,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:51,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:51,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678257507] [2024-06-21 16:02:51,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678257507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:51,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:51,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:51,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557399434] [2024-06-21 16:02:51,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:51,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:51,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:51,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:51,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:51,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:02:51,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 626 transitions, 12459 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:51,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:51,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:02:51,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:52,570 INFO L124 PetriNetUnfolderBase]: 3081/5209 cut-off events. [2024-06-21 16:02:52,571 INFO L125 PetriNetUnfolderBase]: For 1165953/1165963 co-relation queries the response was YES. [2024-06-21 16:02:52,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48597 conditions, 5209 events. 3081/5209 cut-off events. For 1165953/1165963 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 34673 event pairs, 595 based on Foata normal form. 1/5204 useless extension candidates. Maximal degree in co-relation 48381. Up to 4670 conditions per place. [2024-06-21 16:02:52,644 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 588 selfloop transitions, 48 changer transitions 0/644 dead transitions. [2024-06-21 16:02:52,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 644 transitions, 13856 flow [2024-06-21 16:02:52,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:52,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:52,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-21 16:02:52,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-21 16:02:52,646 INFO L175 Difference]: Start difference. First operand has 474 places, 626 transitions, 12459 flow. Second operand 8 states and 181 transitions. [2024-06-21 16:02:52,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 644 transitions, 13856 flow [2024-06-21 16:03:00,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 644 transitions, 13187 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 16:03:00,047 INFO L231 Difference]: Finished difference. Result has 476 places, 629 transitions, 11981 flow [2024-06-21 16:03:00,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11793, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11981, PETRI_PLACES=476, PETRI_TRANSITIONS=629} [2024-06-21 16:03:00,048 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-21 16:03:00,048 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 629 transitions, 11981 flow [2024-06-21 16:03:00,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:00,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:00,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:00,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 16:03:00,048 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)] === [2024-06-21 16:03:00,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:00,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1067090037, now seen corresponding path program 18 times [2024-06-21 16:03:00,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:00,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691047681] [2024-06-21 16:03:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:00,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:00,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:00,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691047681] [2024-06-21 16:03:00,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691047681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:00,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:00,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:00,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110165670] [2024-06-21 16:03:00,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:00,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:00,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:00,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:00,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:00,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:00,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 629 transitions, 11981 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:00,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:00,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:00,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:01,353 INFO L124 PetriNetUnfolderBase]: 3078/5204 cut-off events. [2024-06-21 16:03:01,354 INFO L125 PetriNetUnfolderBase]: For 1166670/1166670 co-relation queries the response was YES. [2024-06-21 16:03:01,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47805 conditions, 5204 events. 3078/5204 cut-off events. For 1166670/1166670 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 34678 event pairs, 647 based on Foata normal form. 1/5168 useless extension candidates. Maximal degree in co-relation 47588. Up to 4224 conditions per place. [2024-06-21 16:03:01,430 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 404 selfloop transitions, 238 changer transitions 0/650 dead transitions. [2024-06-21 16:03:01,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 650 transitions, 14157 flow [2024-06-21 16:03:01,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:03:01,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:03:01,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-21 16:03:01,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-21 16:03:01,431 INFO L175 Difference]: Start difference. First operand has 476 places, 629 transitions, 11981 flow. Second operand 10 states and 231 transitions. [2024-06-21 16:03:01,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 650 transitions, 14157 flow [2024-06-21 16:03:10,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 650 transitions, 14020 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 16:03:10,057 INFO L231 Difference]: Finished difference. Result has 481 places, 629 transitions, 12326 flow [2024-06-21 16:03:10,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11844, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12326, PETRI_PLACES=481, PETRI_TRANSITIONS=629} [2024-06-21 16:03:10,057 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-21 16:03:10,058 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 629 transitions, 12326 flow [2024-06-21 16:03:10,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:10,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:10,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:10,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 16:03:10,058 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)] === [2024-06-21 16:03:10,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:10,059 INFO L85 PathProgramCache]: Analyzing trace with hash 601482151, now seen corresponding path program 12 times [2024-06-21 16:03:10,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:10,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749791719] [2024-06-21 16:03:10,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:10,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:10,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:10,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749791719] [2024-06-21 16:03:10,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749791719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:10,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:10,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:10,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587828082] [2024-06-21 16:03:10,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:10,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:10,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:10,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:10,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:10,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:10,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 629 transitions, 12326 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:10,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:10,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:10,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:11,355 INFO L124 PetriNetUnfolderBase]: 3091/5218 cut-off events. [2024-06-21 16:03:11,355 INFO L125 PetriNetUnfolderBase]: For 1198690/1198690 co-relation queries the response was YES. [2024-06-21 16:03:11,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48759 conditions, 5218 events. 3091/5218 cut-off events. For 1198690/1198690 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 34743 event pairs, 702 based on Foata normal form. 1/5168 useless extension candidates. Maximal degree in co-relation 48541. Up to 3856 conditions per place. [2024-06-21 16:03:11,434 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 289 selfloop transitions, 357 changer transitions 0/654 dead transitions. [2024-06-21 16:03:11,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 654 transitions, 14684 flow [2024-06-21 16:03:11,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:11,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:11,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 16:03:11,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 16:03:11,435 INFO L175 Difference]: Start difference. First operand has 481 places, 629 transitions, 12326 flow. Second operand 8 states and 194 transitions. [2024-06-21 16:03:11,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 654 transitions, 14684 flow [2024-06-21 16:03:18,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 654 transitions, 13589 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-21 16:03:18,660 INFO L231 Difference]: Finished difference. Result has 479 places, 635 transitions, 12123 flow [2024-06-21 16:03:18,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11231, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12123, PETRI_PLACES=479, PETRI_TRANSITIONS=635} [2024-06-21 16:03:18,660 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 437 predicate places. [2024-06-21 16:03:18,660 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 635 transitions, 12123 flow [2024-06-21 16:03:18,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:18,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:18,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:18,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 16:03:18,661 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)] === [2024-06-21 16:03:18,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:18,661 INFO L85 PathProgramCache]: Analyzing trace with hash 890896651, now seen corresponding path program 19 times [2024-06-21 16:03:18,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:18,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250011284] [2024-06-21 16:03:18,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:18,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:18,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:18,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250011284] [2024-06-21 16:03:18,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250011284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:18,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:18,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:18,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007052865] [2024-06-21 16:03:18,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:18,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:18,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:18,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:18,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:18,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:18,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 635 transitions, 12123 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:18,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:18,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:18,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:19,958 INFO L124 PetriNetUnfolderBase]: 3088/5222 cut-off events. [2024-06-21 16:03:19,958 INFO L125 PetriNetUnfolderBase]: For 1192825/1192825 co-relation queries the response was YES. [2024-06-21 16:03:20,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48442 conditions, 5222 events. 3088/5222 cut-off events. For 1192825/1192825 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34865 event pairs, 647 based on Foata normal form. 1/5186 useless extension candidates. Maximal degree in co-relation 48225. Up to 4239 conditions per place. [2024-06-21 16:03:20,040 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 408 selfloop transitions, 237 changer transitions 0/653 dead transitions. [2024-06-21 16:03:20,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 653 transitions, 14029 flow [2024-06-21 16:03:20,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:20,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:20,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 16:03:20,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-21 16:03:20,041 INFO L175 Difference]: Start difference. First operand has 479 places, 635 transitions, 12123 flow. Second operand 8 states and 189 transitions. [2024-06-21 16:03:20,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 653 transitions, 14029 flow [2024-06-21 16:03:28,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 653 transitions, 13360 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 16:03:28,365 INFO L231 Difference]: Finished difference. Result has 483 places, 635 transitions, 11934 flow [2024-06-21 16:03:28,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11454, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11934, PETRI_PLACES=483, PETRI_TRANSITIONS=635} [2024-06-21 16:03:28,366 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-21 16:03:28,366 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 635 transitions, 11934 flow [2024-06-21 16:03:28,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:28,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:28,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:28,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 16:03:28,368 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)] === [2024-06-21 16:03:28,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:28,368 INFO L85 PathProgramCache]: Analyzing trace with hash 601096015, now seen corresponding path program 20 times [2024-06-21 16:03:28,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:28,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745090262] [2024-06-21 16:03:28,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:28,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:28,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:28,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745090262] [2024-06-21 16:03:28,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745090262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:28,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:28,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:28,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935340815] [2024-06-21 16:03:28,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:28,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:28,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:28,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:28,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:28,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:28,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 635 transitions, 11934 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:28,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:28,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:28,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:29,646 INFO L124 PetriNetUnfolderBase]: 3085/5206 cut-off events. [2024-06-21 16:03:29,646 INFO L125 PetriNetUnfolderBase]: For 1197711/1197711 co-relation queries the response was YES. [2024-06-21 16:03:29,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48105 conditions, 5206 events. 3085/5206 cut-off events. For 1197711/1197711 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34617 event pairs, 659 based on Foata normal form. 1/5162 useless extension candidates. Maximal degree in co-relation 47887. Up to 4236 conditions per place. [2024-06-21 16:03:29,726 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 237 changer transitions 0/652 dead transitions. [2024-06-21 16:03:29,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 652 transitions, 13556 flow [2024-06-21 16:03:29,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:29,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:29,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 16:03:29,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-21 16:03:29,727 INFO L175 Difference]: Start difference. First operand has 483 places, 635 transitions, 11934 flow. Second operand 8 states and 186 transitions. [2024-06-21 16:03:29,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 652 transitions, 13556 flow [2024-06-21 16:03:37,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 652 transitions, 13076 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 16:03:37,130 INFO L231 Difference]: Finished difference. Result has 484 places, 635 transitions, 11934 flow [2024-06-21 16:03:37,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11454, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11934, PETRI_PLACES=484, PETRI_TRANSITIONS=635} [2024-06-21 16:03:37,131 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-21 16:03:37,131 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 635 transitions, 11934 flow [2024-06-21 16:03:37,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:37,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:37,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:37,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 16:03:37,131 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)] === [2024-06-21 16:03:37,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:37,132 INFO L85 PathProgramCache]: Analyzing trace with hash 601096201, now seen corresponding path program 13 times [2024-06-21 16:03:37,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:37,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486876928] [2024-06-21 16:03:37,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:37,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:37,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:37,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486876928] [2024-06-21 16:03:37,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486876928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:37,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:37,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:37,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851049985] [2024-06-21 16:03:37,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:37,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:37,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:37,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:37,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:37,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:37,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 635 transitions, 11934 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:37,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:37,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:37,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:38,417 INFO L124 PetriNetUnfolderBase]: 3082/5203 cut-off events. [2024-06-21 16:03:38,417 INFO L125 PetriNetUnfolderBase]: For 1203496/1203496 co-relation queries the response was YES. [2024-06-21 16:03:38,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48033 conditions, 5203 events. 3082/5203 cut-off events. For 1203496/1203496 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 34638 event pairs, 700 based on Foata normal form. 1/5153 useless extension candidates. Maximal degree in co-relation 47814. Up to 3850 conditions per place. [2024-06-21 16:03:38,492 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 287 selfloop transitions, 358 changer transitions 0/653 dead transitions. [2024-06-21 16:03:38,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 653 transitions, 13848 flow [2024-06-21 16:03:38,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:38,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:38,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 16:03:38,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 16:03:38,493 INFO L175 Difference]: Start difference. First operand has 484 places, 635 transitions, 11934 flow. Second operand 8 states and 192 transitions. [2024-06-21 16:03:38,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 653 transitions, 13848 flow [2024-06-21 16:03:46,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 653 transitions, 13314 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 16:03:46,103 INFO L231 Difference]: Finished difference. Result has 485 places, 635 transitions, 12122 flow [2024-06-21 16:03:46,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11400, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12122, PETRI_PLACES=485, PETRI_TRANSITIONS=635} [2024-06-21 16:03:46,104 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-21 16:03:46,104 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 635 transitions, 12122 flow [2024-06-21 16:03:46,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:46,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:46,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:46,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 16:03:46,104 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)] === [2024-06-21 16:03:46,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:46,105 INFO L85 PathProgramCache]: Analyzing trace with hash 829620863, now seen corresponding path program 14 times [2024-06-21 16:03:46,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:46,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054809815] [2024-06-21 16:03:46,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:46,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:46,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:46,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054809815] [2024-06-21 16:03:46,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054809815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:46,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:46,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:46,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036131279] [2024-06-21 16:03:46,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:46,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:46,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:46,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:46,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:46,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:46,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 635 transitions, 12122 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:46,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:46,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:46,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:47,499 INFO L124 PetriNetUnfolderBase]: 3097/5243 cut-off events. [2024-06-21 16:03:47,499 INFO L125 PetriNetUnfolderBase]: For 1220786/1220796 co-relation queries the response was YES. [2024-06-21 16:03:47,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48595 conditions, 5243 events. 3097/5243 cut-off events. For 1220786/1220796 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 35019 event pairs, 582 based on Foata normal form. 1/5242 useless extension candidates. Maximal degree in co-relation 48375. Up to 4711 conditions per place. [2024-06-21 16:03:47,567 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 620 selfloop transitions, 34 changer transitions 0/662 dead transitions. [2024-06-21 16:03:47,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 662 transitions, 13686 flow [2024-06-21 16:03:47,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:47,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:47,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 16:03:47,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-21 16:03:47,568 INFO L175 Difference]: Start difference. First operand has 485 places, 635 transitions, 12122 flow. Second operand 8 states and 185 transitions. [2024-06-21 16:03:47,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 662 transitions, 13686 flow [2024-06-21 16:03:54,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 662 transitions, 12952 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:03:54,980 INFO L231 Difference]: Finished difference. Result has 487 places, 644 transitions, 11682 flow [2024-06-21 16:03:54,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11402, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11682, PETRI_PLACES=487, PETRI_TRANSITIONS=644} [2024-06-21 16:03:54,980 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-21 16:03:54,981 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 644 transitions, 11682 flow [2024-06-21 16:03:54,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:54,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:54,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:54,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 16:03:54,981 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)] === [2024-06-21 16:03:54,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:54,981 INFO L85 PathProgramCache]: Analyzing trace with hash 657845957, now seen corresponding path program 21 times [2024-06-21 16:03:54,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:54,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618246796] [2024-06-21 16:03:54,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:54,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:55,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:55,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618246796] [2024-06-21 16:03:55,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618246796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:55,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:55,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:03:55,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428603187] [2024-06-21 16:03:55,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:55,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:03:55,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:55,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:03:55,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:03:55,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:03:55,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 644 transitions, 11682 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:55,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:55,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:03:55,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:56,434 INFO L124 PetriNetUnfolderBase]: 3094/5232 cut-off events. [2024-06-21 16:03:56,435 INFO L125 PetriNetUnfolderBase]: For 1217290/1217290 co-relation queries the response was YES. [2024-06-21 16:03:56,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47742 conditions, 5232 events. 3094/5232 cut-off events. For 1217290/1217290 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 34953 event pairs, 575 based on Foata normal form. 1/5220 useless extension candidates. Maximal degree in co-relation 47520. Up to 4395 conditions per place. [2024-06-21 16:03:56,500 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 500 selfloop transitions, 162 changer transitions 0/670 dead transitions. [2024-06-21 16:03:56,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 670 transitions, 13384 flow [2024-06-21 16:03:56,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:03:56,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:03:56,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 16:03:56,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-21 16:03:56,502 INFO L175 Difference]: Start difference. First operand has 487 places, 644 transitions, 11682 flow. Second operand 7 states and 178 transitions. [2024-06-21 16:03:56,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 670 transitions, 13384 flow [2024-06-21 16:04:04,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 670 transitions, 13234 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-21 16:04:04,523 INFO L231 Difference]: Finished difference. Result has 489 places, 644 transitions, 11870 flow [2024-06-21 16:04:04,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11532, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11870, PETRI_PLACES=489, PETRI_TRANSITIONS=644} [2024-06-21 16:04:04,523 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 447 predicate places. [2024-06-21 16:04:04,523 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 644 transitions, 11870 flow [2024-06-21 16:04:04,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:04,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:04,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:04,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 16:04:04,524 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)] === [2024-06-21 16:04:04,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:04,524 INFO L85 PathProgramCache]: Analyzing trace with hash -760849701, now seen corresponding path program 15 times [2024-06-21 16:04:04,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:04,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094906760] [2024-06-21 16:04:04,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:04,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:04,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:04,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094906760] [2024-06-21 16:04:04,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094906760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:04,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:04,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:04,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266803543] [2024-06-21 16:04:04,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:04,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:04,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:04,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:04,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:04,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:04:04,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 644 transitions, 11870 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:04,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:04,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:04:04,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:06,001 INFO L124 PetriNetUnfolderBase]: 3131/5315 cut-off events. [2024-06-21 16:04:06,001 INFO L125 PetriNetUnfolderBase]: For 1277925/1277927 co-relation queries the response was YES. [2024-06-21 16:04:06,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49387 conditions, 5315 events. 3131/5315 cut-off events. For 1277925/1277927 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35639 event pairs, 578 based on Foata normal form. 1/5314 useless extension candidates. Maximal degree in co-relation 49164. Up to 4219 conditions per place. [2024-06-21 16:04:06,068 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 429 selfloop transitions, 250 changer transitions 0/687 dead transitions. [2024-06-21 16:04:06,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 687 transitions, 14281 flow [2024-06-21 16:04:06,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:04:06,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:04:06,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-21 16:04:06,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5878048780487805 [2024-06-21 16:04:06,069 INFO L175 Difference]: Start difference. First operand has 489 places, 644 transitions, 11870 flow. Second operand 10 states and 241 transitions. [2024-06-21 16:04:06,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 687 transitions, 14281 flow [2024-06-21 16:04:14,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 687 transitions, 13889 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 16:04:14,247 INFO L231 Difference]: Finished difference. Result has 491 places, 657 transitions, 12277 flow [2024-06-21 16:04:14,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11482, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12277, PETRI_PLACES=491, PETRI_TRANSITIONS=657} [2024-06-21 16:04:14,247 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-21 16:04:14,248 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 657 transitions, 12277 flow [2024-06-21 16:04:14,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:14,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:14,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:14,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 16:04:14,248 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)] === [2024-06-21 16:04:14,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:14,248 INFO L85 PathProgramCache]: Analyzing trace with hash -624114777, now seen corresponding path program 22 times [2024-06-21 16:04:14,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:14,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142489754] [2024-06-21 16:04:14,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:14,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:14,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:14,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142489754] [2024-06-21 16:04:14,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142489754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:14,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:14,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:04:14,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581422389] [2024-06-21 16:04:14,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:14,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:04:14,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:14,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:04:14,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:04:14,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:04:14,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 657 transitions, 12277 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:14,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:14,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:04:14,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:15,767 INFO L124 PetriNetUnfolderBase]: 3128/5303 cut-off events. [2024-06-21 16:04:15,767 INFO L125 PetriNetUnfolderBase]: For 1267142/1267144 co-relation queries the response was YES. [2024-06-21 16:04:15,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49366 conditions, 5303 events. 3128/5303 cut-off events. For 1267142/1267144 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35531 event pairs, 565 based on Foata normal form. 1/5302 useless extension candidates. Maximal degree in co-relation 49143. Up to 4443 conditions per place. [2024-06-21 16:04:15,835 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 517 selfloop transitions, 165 changer transitions 0/690 dead transitions. [2024-06-21 16:04:15,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 690 transitions, 14041 flow [2024-06-21 16:04:15,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:04:15,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:04:15,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 16:04:15,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-21 16:04:15,836 INFO L175 Difference]: Start difference. First operand has 491 places, 657 transitions, 12277 flow. Second operand 8 states and 203 transitions. [2024-06-21 16:04:15,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 690 transitions, 14041 flow [2024-06-21 16:04:23,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 690 transitions, 13861 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-21 16:04:23,404 INFO L231 Difference]: Finished difference. Result has 494 places, 657 transitions, 12450 flow [2024-06-21 16:04:23,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12099, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12450, PETRI_PLACES=494, PETRI_TRANSITIONS=657} [2024-06-21 16:04:23,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-21 16:04:23,404 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 657 transitions, 12450 flow [2024-06-21 16:04:23,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:23,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:23,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:23,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 16:04:23,405 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)] === [2024-06-21 16:04:23,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:23,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1311995427, now seen corresponding path program 16 times [2024-06-21 16:04:23,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:23,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591166956] [2024-06-21 16:04:23,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:23,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:23,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:23,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591166956] [2024-06-21 16:04:23,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591166956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:23,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:23,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:23,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292675333] [2024-06-21 16:04:23,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:23,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:23,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:23,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:23,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:23,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:04:23,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 657 transitions, 12450 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:23,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:23,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:04:23,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:24,987 INFO L124 PetriNetUnfolderBase]: 3125/5287 cut-off events. [2024-06-21 16:04:24,987 INFO L125 PetriNetUnfolderBase]: For 1258740/1258750 co-relation queries the response was YES. [2024-06-21 16:04:25,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49548 conditions, 5287 events. 3125/5287 cut-off events. For 1258740/1258750 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 35364 event pairs, 572 based on Foata normal form. 1/5284 useless extension candidates. Maximal degree in co-relation 49323. Up to 4402 conditions per place. [2024-06-21 16:04:25,058 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 506 selfloop transitions, 173 changer transitions 0/687 dead transitions. [2024-06-21 16:04:25,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 687 transitions, 14590 flow [2024-06-21 16:04:25,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:04:25,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:04:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 16:04:25,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6480836236933798 [2024-06-21 16:04:25,059 INFO L175 Difference]: Start difference. First operand has 494 places, 657 transitions, 12450 flow. Second operand 7 states and 186 transitions. [2024-06-21 16:04:25,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 687 transitions, 14590 flow [2024-06-21 16:04:33,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 687 transitions, 13970 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-21 16:04:33,275 INFO L231 Difference]: Finished difference. Result has 490 places, 658 transitions, 12255 flow [2024-06-21 16:04:33,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11838, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12255, PETRI_PLACES=490, PETRI_TRANSITIONS=658} [2024-06-21 16:04:33,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-21 16:04:33,279 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 658 transitions, 12255 flow [2024-06-21 16:04:33,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:33,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:33,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:33,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 16:04:33,280 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)] === [2024-06-21 16:04:33,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:33,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1848024689, now seen corresponding path program 17 times [2024-06-21 16:04:33,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:33,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626052786] [2024-06-21 16:04:33,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:33,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:33,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:33,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626052786] [2024-06-21 16:04:33,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626052786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:33,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:33,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:33,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260777414] [2024-06-21 16:04:33,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:33,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:33,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:33,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:33,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:33,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:04:33,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 658 transitions, 12255 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:33,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:33,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:04:33,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:34,874 INFO L124 PetriNetUnfolderBase]: 3122/5287 cut-off events. [2024-06-21 16:04:34,874 INFO L125 PetriNetUnfolderBase]: For 1229006/1229006 co-relation queries the response was YES. [2024-06-21 16:04:34,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49113 conditions, 5287 events. 3122/5287 cut-off events. For 1229006/1229006 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35442 event pairs, 564 based on Foata normal form. 1/5286 useless extension candidates. Maximal degree in co-relation 48890. Up to 4659 conditions per place. [2024-06-21 16:04:34,943 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 616 selfloop transitions, 67 changer transitions 0/691 dead transitions. [2024-06-21 16:04:34,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 691 transitions, 14025 flow [2024-06-21 16:04:34,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:04:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:04:34,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 16:04:34,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-21 16:04:34,944 INFO L175 Difference]: Start difference. First operand has 490 places, 658 transitions, 12255 flow. Second operand 7 states and 183 transitions. [2024-06-21 16:04:34,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 691 transitions, 14025 flow [2024-06-21 16:04:42,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 691 transitions, 13625 flow, removed 56 selfloop flow, removed 9 redundant places. [2024-06-21 16:04:42,697 INFO L231 Difference]: Finished difference. Result has 488 places, 658 transitions, 12011 flow [2024-06-21 16:04:42,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11855, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12011, PETRI_PLACES=488, PETRI_TRANSITIONS=658} [2024-06-21 16:04:42,697 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 446 predicate places. [2024-06-21 16:04:42,697 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 658 transitions, 12011 flow [2024-06-21 16:04:42,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:42,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:42,698 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] [2024-06-21 16:04:42,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 16:04:42,698 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)] === [2024-06-21 16:04:42,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:42,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1614258037, now seen corresponding path program 18 times [2024-06-21 16:04:42,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:42,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318913340] [2024-06-21 16:04:42,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:42,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:42,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:42,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318913340] [2024-06-21 16:04:42,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318913340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:42,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:42,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:42,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332457071] [2024-06-21 16:04:42,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:42,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:42,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:42,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:42,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:42,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:04:42,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 658 transitions, 12011 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:42,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:42,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:04:42,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:44,068 INFO L124 PetriNetUnfolderBase]: 3127/5289 cut-off events. [2024-06-21 16:04:44,068 INFO L125 PetriNetUnfolderBase]: For 1248884/1248884 co-relation queries the response was YES. [2024-06-21 16:04:44,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48927 conditions, 5289 events. 3127/5289 cut-off events. For 1248884/1248884 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35365 event pairs, 582 based on Foata normal form. 1/5277 useless extension candidates. Maximal degree in co-relation 48707. Up to 4217 conditions per place. [2024-06-21 16:04:44,309 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 418 selfloop transitions, 263 changer transitions 0/689 dead transitions. [2024-06-21 16:04:44,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 689 transitions, 14779 flow [2024-06-21 16:04:44,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:04:44,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:04:44,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 16:04:44,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-21 16:04:44,310 INFO L175 Difference]: Start difference. First operand has 488 places, 658 transitions, 12011 flow. Second operand 8 states and 202 transitions. [2024-06-21 16:04:44,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 689 transitions, 14779 flow [2024-06-21 16:04:51,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 689 transitions, 14469 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 16:04:51,014 INFO L231 Difference]: Finished difference. Result has 490 places, 662 transitions, 12387 flow [2024-06-21 16:04:51,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11701, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12387, PETRI_PLACES=490, PETRI_TRANSITIONS=662} [2024-06-21 16:04:51,014 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-21 16:04:51,014 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 662 transitions, 12387 flow [2024-06-21 16:04:51,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:51,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:51,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:51,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 16:04:51,015 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)] === [2024-06-21 16:04:51,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:51,015 INFO L85 PathProgramCache]: Analyzing trace with hash 799293917, now seen corresponding path program 19 times [2024-06-21 16:04:51,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:51,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924020085] [2024-06-21 16:04:51,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:51,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:51,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:51,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924020085] [2024-06-21 16:04:51,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924020085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:51,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:51,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:51,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020412273] [2024-06-21 16:04:51,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:51,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:51,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:51,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:51,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:51,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:04:51,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 662 transitions, 12387 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:51,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:51,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:04:51,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:52,415 INFO L124 PetriNetUnfolderBase]: 3124/5286 cut-off events. [2024-06-21 16:04:52,415 INFO L125 PetriNetUnfolderBase]: For 1254122/1254132 co-relation queries the response was YES. [2024-06-21 16:04:52,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49221 conditions, 5286 events. 3124/5286 cut-off events. For 1254122/1254132 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 35362 event pairs, 569 based on Foata normal form. 1/5283 useless extension candidates. Maximal degree in co-relation 49001. Up to 4405 conditions per place. [2024-06-21 16:04:52,494 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 501 selfloop transitions, 188 changer transitions 0/697 dead transitions. [2024-06-21 16:04:52,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 697 transitions, 14171 flow [2024-06-21 16:04:52,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:04:52,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:04:52,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-21 16:04:52,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-21 16:04:52,495 INFO L175 Difference]: Start difference. First operand has 490 places, 662 transitions, 12387 flow. Second operand 9 states and 231 transitions. [2024-06-21 16:04:52,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 697 transitions, 14171 flow [2024-06-21 16:05:01,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 697 transitions, 13497 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-21 16:05:01,933 INFO L231 Difference]: Finished difference. Result has 493 places, 662 transitions, 12111 flow [2024-06-21 16:05:01,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11713, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12111, PETRI_PLACES=493, PETRI_TRANSITIONS=662} [2024-06-21 16:05:01,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-21 16:05:01,934 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 662 transitions, 12111 flow [2024-06-21 16:05:01,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:01,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:01,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:01,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 16:05:01,935 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)] === [2024-06-21 16:05:01,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:01,935 INFO L85 PathProgramCache]: Analyzing trace with hash 401138243, now seen corresponding path program 20 times [2024-06-21 16:05:01,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:01,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605631611] [2024-06-21 16:05:01,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:01,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:02,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:02,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605631611] [2024-06-21 16:05:02,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605631611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:02,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:02,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:05:02,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614592171] [2024-06-21 16:05:02,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:02,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:05:02,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:02,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:05:02,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:05:02,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:05:02,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 662 transitions, 12111 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:02,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:02,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:05:02,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:03,327 INFO L124 PetriNetUnfolderBase]: 3121/5298 cut-off events. [2024-06-21 16:05:03,328 INFO L125 PetriNetUnfolderBase]: For 1253281/1253281 co-relation queries the response was YES. [2024-06-21 16:05:03,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48974 conditions, 5298 events. 3121/5298 cut-off events. For 1253281/1253281 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35566 event pairs, 594 based on Foata normal form. 1/5286 useless extension candidates. Maximal degree in co-relation 48753. Up to 4213 conditions per place. [2024-06-21 16:05:03,408 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 415 selfloop transitions, 267 changer transitions 0/690 dead transitions. [2024-06-21 16:05:03,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 690 transitions, 14159 flow [2024-06-21 16:05:03,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:05:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:05:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 16:05:03,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-21 16:05:03,409 INFO L175 Difference]: Start difference. First operand has 493 places, 662 transitions, 12111 flow. Second operand 8 states and 203 transitions. [2024-06-21 16:05:03,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 690 transitions, 14159 flow [2024-06-21 16:05:13,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 690 transitions, 13683 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-21 16:05:13,484 INFO L231 Difference]: Finished difference. Result has 492 places, 662 transitions, 12179 flow [2024-06-21 16:05:13,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11639, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12179, PETRI_PLACES=492, PETRI_TRANSITIONS=662} [2024-06-21 16:05:13,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-21 16:05:13,484 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 662 transitions, 12179 flow [2024-06-21 16:05:13,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:13,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:13,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:13,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 16:05:13,485 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)] === [2024-06-21 16:05:13,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:13,486 INFO L85 PathProgramCache]: Analyzing trace with hash -768201351, now seen corresponding path program 21 times [2024-06-21 16:05:13,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:13,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844016472] [2024-06-21 16:05:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:13,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:13,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:13,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844016472] [2024-06-21 16:05:13,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844016472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:13,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:13,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:05:13,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113796048] [2024-06-21 16:05:13,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:13,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:05:13,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:13,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:05:13,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:05:13,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:05:13,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 662 transitions, 12179 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:13,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:13,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:05:13,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:14,862 INFO L124 PetriNetUnfolderBase]: 3126/5313 cut-off events. [2024-06-21 16:05:14,863 INFO L125 PetriNetUnfolderBase]: For 1254739/1254741 co-relation queries the response was YES. [2024-06-21 16:05:14,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49164 conditions, 5313 events. 3126/5313 cut-off events. For 1254739/1254741 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 35659 event pairs, 574 based on Foata normal form. 1/5312 useless extension candidates. Maximal degree in co-relation 48943. Up to 4217 conditions per place. [2024-06-21 16:05:14,941 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 428 selfloop transitions, 260 changer transitions 0/696 dead transitions. [2024-06-21 16:05:14,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 696 transitions, 14328 flow [2024-06-21 16:05:14,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:05:14,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:05:14,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-21 16:05:14,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 16:05:14,942 INFO L175 Difference]: Start difference. First operand has 492 places, 662 transitions, 12179 flow. Second operand 9 states and 225 transitions. [2024-06-21 16:05:14,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 696 transitions, 14328 flow [2024-06-21 16:05:23,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 696 transitions, 13728 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 16:05:23,351 INFO L231 Difference]: Finished difference. Result has 493 places, 665 transitions, 12198 flow [2024-06-21 16:05:23,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11589, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12198, PETRI_PLACES=493, PETRI_TRANSITIONS=665} [2024-06-21 16:05:23,351 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-21 16:05:23,352 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 665 transitions, 12198 flow [2024-06-21 16:05:23,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:23,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:23,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:23,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 16:05:23,352 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)] === [2024-06-21 16:05:23,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:23,353 INFO L85 PathProgramCache]: Analyzing trace with hash -624322167, now seen corresponding path program 23 times [2024-06-21 16:05:23,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:23,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591743763] [2024-06-21 16:05:23,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:23,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:23,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:23,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591743763] [2024-06-21 16:05:23,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591743763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:23,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:23,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:05:23,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257838067] [2024-06-21 16:05:23,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:23,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:05:23,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:23,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:05:23,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:05:23,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:05:23,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 665 transitions, 12198 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:23,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:23,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:05:23,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:24,797 INFO L124 PetriNetUnfolderBase]: 3123/5305 cut-off events. [2024-06-21 16:05:24,797 INFO L125 PetriNetUnfolderBase]: For 1243487/1243489 co-relation queries the response was YES. [2024-06-21 16:05:24,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48939 conditions, 5305 events. 3123/5305 cut-off events. For 1243487/1243489 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 35602 event pairs, 571 based on Foata normal form. 1/5304 useless extension candidates. Maximal degree in co-relation 48717. Up to 4438 conditions per place. [2024-06-21 16:05:24,880 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 534 selfloop transitions, 159 changer transitions 0/701 dead transitions. [2024-06-21 16:05:24,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 701 transitions, 13998 flow [2024-06-21 16:05:24,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:05:24,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:05:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-21 16:05:24,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124661246612466 [2024-06-21 16:05:24,881 INFO L175 Difference]: Start difference. First operand has 493 places, 665 transitions, 12198 flow. Second operand 9 states and 226 transitions. [2024-06-21 16:05:24,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 701 transitions, 13998 flow [2024-06-21 16:05:33,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 701 transitions, 13441 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 16:05:33,353 INFO L231 Difference]: Finished difference. Result has 494 places, 665 transitions, 11982 flow [2024-06-21 16:05:33,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11643, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11982, PETRI_PLACES=494, PETRI_TRANSITIONS=665} [2024-06-21 16:05:33,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-21 16:05:33,354 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 665 transitions, 11982 flow [2024-06-21 16:05:33,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:33,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:33,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:33,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 16:05:33,354 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)] === [2024-06-21 16:05:33,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:33,355 INFO L85 PathProgramCache]: Analyzing trace with hash -624321981, now seen corresponding path program 22 times [2024-06-21 16:05:33,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:33,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423205073] [2024-06-21 16:05:33,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:33,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:33,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:33,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423205073] [2024-06-21 16:05:33,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423205073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:33,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:33,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:05:33,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946391294] [2024-06-21 16:05:33,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:33,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:05:33,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:33,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:05:33,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:05:33,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:05:33,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 665 transitions, 11982 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:33,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:33,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:05:33,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:34,735 INFO L124 PetriNetUnfolderBase]: 3120/5304 cut-off events. [2024-06-21 16:05:34,736 INFO L125 PetriNetUnfolderBase]: For 1233522/1233524 co-relation queries the response was YES. [2024-06-21 16:05:34,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48547 conditions, 5304 events. 3120/5304 cut-off events. For 1233522/1233524 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 35635 event pairs, 574 based on Foata normal form. 1/5303 useless extension candidates. Maximal degree in co-relation 48325. Up to 4213 conditions per place. [2024-06-21 16:05:34,816 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 427 selfloop transitions, 263 changer transitions 0/698 dead transitions. [2024-06-21 16:05:34,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 698 transitions, 13764 flow [2024-06-21 16:05:34,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:05:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:05:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-21 16:05:34,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-21 16:05:34,818 INFO L175 Difference]: Start difference. First operand has 494 places, 665 transitions, 11982 flow. Second operand 9 states and 228 transitions. [2024-06-21 16:05:34,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 698 transitions, 13764 flow [2024-06-21 16:05:43,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 698 transitions, 13428 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-21 16:05:43,620 INFO L231 Difference]: Finished difference. Result has 493 places, 665 transitions, 12186 flow [2024-06-21 16:05:43,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11650, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12186, PETRI_PLACES=493, PETRI_TRANSITIONS=665} [2024-06-21 16:05:43,621 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-21 16:05:43,621 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 665 transitions, 12186 flow [2024-06-21 16:05:43,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:43,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:43,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:43,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 16:05:43,622 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)] === [2024-06-21 16:05:43,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:43,622 INFO L85 PathProgramCache]: Analyzing trace with hash 401138057, now seen corresponding path program 24 times [2024-06-21 16:05:43,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:43,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199850285] [2024-06-21 16:05:43,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:43,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:43,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:43,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199850285] [2024-06-21 16:05:43,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199850285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:43,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:43,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:05:43,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434691053] [2024-06-21 16:05:43,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:43,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:05:43,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:43,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:05:43,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:05:43,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:05:43,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 665 transitions, 12186 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:43,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:43,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:05:43,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:45,056 INFO L124 PetriNetUnfolderBase]: 3117/5295 cut-off events. [2024-06-21 16:05:45,056 INFO L125 PetriNetUnfolderBase]: For 1211202/1211202 co-relation queries the response was YES. [2024-06-21 16:05:45,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48426 conditions, 5295 events. 3117/5295 cut-off events. For 1211202/1211202 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 35603 event pairs, 586 based on Foata normal form. 1/5283 useless extension candidates. Maximal degree in co-relation 48205. Up to 4431 conditions per place. [2024-06-21 16:05:45,155 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 524 selfloop transitions, 162 changer transitions 0/694 dead transitions. [2024-06-21 16:05:45,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 694 transitions, 13658 flow [2024-06-21 16:05:45,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:05:45,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:05:45,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 16:05:45,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 16:05:45,157 INFO L175 Difference]: Start difference. First operand has 493 places, 665 transitions, 12186 flow. Second operand 8 states and 200 transitions. [2024-06-21 16:05:45,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 694 transitions, 13658 flow [2024-06-21 16:05:54,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 694 transitions, 13056 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 16:05:54,758 INFO L231 Difference]: Finished difference. Result has 491 places, 665 transitions, 11925 flow [2024-06-21 16:05:54,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11584, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11925, PETRI_PLACES=491, PETRI_TRANSITIONS=665} [2024-06-21 16:05:54,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-21 16:05:54,759 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 665 transitions, 11925 flow [2024-06-21 16:05:54,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:54,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:54,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:54,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 16:05:54,759 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)] === [2024-06-21 16:05:54,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:54,760 INFO L85 PathProgramCache]: Analyzing trace with hash -772023837, now seen corresponding path program 4 times [2024-06-21 16:05:54,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:54,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712858468] [2024-06-21 16:05:54,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:54,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:54,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:54,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712858468] [2024-06-21 16:05:54,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712858468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:54,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:54,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:05:54,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404652877] [2024-06-21 16:05:54,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:54,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:05:54,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:54,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:05:54,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:05:54,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:05:54,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 665 transitions, 11925 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:54,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:54,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:05:54,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:56,143 INFO L124 PetriNetUnfolderBase]: 3104/5283 cut-off events. [2024-06-21 16:05:56,143 INFO L125 PetriNetUnfolderBase]: For 1198272/1198272 co-relation queries the response was YES. [2024-06-21 16:05:56,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47211 conditions, 5283 events. 3104/5283 cut-off events. For 1198272/1198272 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 35478 event pairs, 440 based on Foata normal form. 6/5287 useless extension candidates. Maximal degree in co-relation 46990. Up to 4388 conditions per place. [2024-06-21 16:05:56,225 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 630 selfloop transitions, 61 changer transitions 0/699 dead transitions. [2024-06-21 16:05:56,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 699 transitions, 13449 flow [2024-06-21 16:05:56,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:05:56,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:05:56,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 16:05:56,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-21 16:05:56,226 INFO L175 Difference]: Start difference. First operand has 491 places, 665 transitions, 11925 flow. Second operand 7 states and 180 transitions. [2024-06-21 16:05:56,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 699 transitions, 13449 flow [2024-06-21 16:06:05,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 699 transitions, 12930 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 16:06:05,393 INFO L231 Difference]: Finished difference. Result has 488 places, 665 transitions, 11538 flow [2024-06-21 16:06:05,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11406, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11538, PETRI_PLACES=488, PETRI_TRANSITIONS=665} [2024-06-21 16:06:05,393 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 446 predicate places. [2024-06-21 16:06:05,393 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 665 transitions, 11538 flow [2024-06-21 16:06:05,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:05,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:05,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:05,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 16:06:05,394 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)] === [2024-06-21 16:06:05,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:05,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1151152237, now seen corresponding path program 5 times [2024-06-21 16:06:05,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:05,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850201706] [2024-06-21 16:06:05,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:05,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:05,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:05,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850201706] [2024-06-21 16:06:05,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850201706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:05,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:05,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:06:05,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279783077] [2024-06-21 16:06:05,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:05,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:06:05,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:05,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:06:05,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:06:05,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:06:05,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 665 transitions, 11538 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:05,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:05,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:06:05,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:06,748 INFO L124 PetriNetUnfolderBase]: 3112/5285 cut-off events. [2024-06-21 16:06:06,749 INFO L125 PetriNetUnfolderBase]: For 1152715/1152715 co-relation queries the response was YES. [2024-06-21 16:06:06,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46969 conditions, 5285 events. 3112/5285 cut-off events. For 1152715/1152715 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 35547 event pairs, 609 based on Foata normal form. 2/5269 useless extension candidates. Maximal degree in co-relation 46748. Up to 4584 conditions per place. [2024-06-21 16:06:06,833 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 584 selfloop transitions, 97 changer transitions 0/689 dead transitions. [2024-06-21 16:06:06,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 689 transitions, 13002 flow [2024-06-21 16:06:06,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:06:06,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:06:06,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 16:06:06,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-21 16:06:06,834 INFO L175 Difference]: Start difference. First operand has 488 places, 665 transitions, 11538 flow. Second operand 8 states and 185 transitions. [2024-06-21 16:06:06,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 689 transitions, 13002 flow [2024-06-21 16:06:15,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 689 transitions, 12897 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 16:06:15,287 INFO L231 Difference]: Finished difference. Result has 491 places, 667 transitions, 11664 flow [2024-06-21 16:06:15,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11433, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11664, PETRI_PLACES=491, PETRI_TRANSITIONS=667} [2024-06-21 16:06:15,288 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-21 16:06:15,288 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 667 transitions, 11664 flow [2024-06-21 16:06:15,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:15,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:15,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:15,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 16:06:15,289 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)] === [2024-06-21 16:06:15,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:15,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1002890007, now seen corresponding path program 6 times [2024-06-21 16:06:15,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:15,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195968777] [2024-06-21 16:06:15,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:15,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:15,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:15,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195968777] [2024-06-21 16:06:15,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195968777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:15,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:15,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:06:15,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601584567] [2024-06-21 16:06:15,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:15,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:06:15,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:15,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:06:15,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:06:15,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:06:15,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 667 transitions, 11664 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:15,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:15,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:06:15,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:16,611 INFO L124 PetriNetUnfolderBase]: 3133/5322 cut-off events. [2024-06-21 16:06:16,612 INFO L125 PetriNetUnfolderBase]: For 1147860/1147866 co-relation queries the response was YES. [2024-06-21 16:06:16,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47286 conditions, 5322 events. 3133/5322 cut-off events. For 1147860/1147866 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 35837 event pairs, 602 based on Foata normal form. 6/5318 useless extension candidates. Maximal degree in co-relation 47065. Up to 4577 conditions per place. [2024-06-21 16:06:16,694 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 594 selfloop transitions, 95 changer transitions 0/697 dead transitions. [2024-06-21 16:06:16,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 697 transitions, 13490 flow [2024-06-21 16:06:16,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:06:16,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:06:16,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 16:06:16,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-21 16:06:16,696 INFO L175 Difference]: Start difference. First operand has 491 places, 667 transitions, 11664 flow. Second operand 7 states and 171 transitions. [2024-06-21 16:06:16,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 697 transitions, 13490 flow [2024-06-21 16:06:25,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 697 transitions, 13279 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 16:06:25,141 INFO L231 Difference]: Finished difference. Result has 492 places, 671 transitions, 11724 flow [2024-06-21 16:06:25,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11453, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11724, PETRI_PLACES=492, PETRI_TRANSITIONS=671} [2024-06-21 16:06:25,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-21 16:06:25,142 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 671 transitions, 11724 flow [2024-06-21 16:06:25,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:25,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:25,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:25,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-21 16:06:25,143 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)] === [2024-06-21 16:06:25,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:25,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1340141025, now seen corresponding path program 5 times [2024-06-21 16:06:25,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:25,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035482896] [2024-06-21 16:06:25,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:25,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:25,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:25,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035482896] [2024-06-21 16:06:25,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035482896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:25,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:25,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:06:25,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182037155] [2024-06-21 16:06:25,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:25,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:06:25,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:25,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:06:25,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:06:25,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:06:25,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 671 transitions, 11724 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:25,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:25,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:06:25,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:26,535 INFO L124 PetriNetUnfolderBase]: 3141/5326 cut-off events. [2024-06-21 16:06:26,535 INFO L125 PetriNetUnfolderBase]: For 1162770/1162770 co-relation queries the response was YES. [2024-06-21 16:06:26,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47624 conditions, 5326 events. 3141/5326 cut-off events. For 1162770/1162770 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 35794 event pairs, 644 based on Foata normal form. 2/5304 useless extension candidates. Maximal degree in co-relation 47402. Up to 4481 conditions per place. [2024-06-21 16:06:26,622 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 486 selfloop transitions, 201 changer transitions 0/695 dead transitions. [2024-06-21 16:06:26,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 695 transitions, 13250 flow [2024-06-21 16:06:26,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:06:26,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:06:26,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 16:06:26,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-21 16:06:26,623 INFO L175 Difference]: Start difference. First operand has 492 places, 671 transitions, 11724 flow. Second operand 8 states and 188 transitions. [2024-06-21 16:06:26,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 695 transitions, 13250 flow [2024-06-21 16:06:34,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 695 transitions, 13094 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 16:06:34,442 INFO L231 Difference]: Finished difference. Result has 497 places, 673 transitions, 12057 flow [2024-06-21 16:06:34,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11568, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12057, PETRI_PLACES=497, PETRI_TRANSITIONS=673} [2024-06-21 16:06:34,443 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-21 16:06:34,443 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 673 transitions, 12057 flow [2024-06-21 16:06:34,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:34,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:34,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:34,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-21 16:06:34,443 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)] === [2024-06-21 16:06:34,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:34,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1000033047, now seen corresponding path program 7 times [2024-06-21 16:06:34,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:34,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145421739] [2024-06-21 16:06:34,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:34,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:34,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:34,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145421739] [2024-06-21 16:06:34,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145421739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:34,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:34,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:06:34,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095681898] [2024-06-21 16:06:34,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:34,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:06:34,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:34,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:06:34,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:06:34,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:06:34,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 673 transitions, 12057 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:34,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:34,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:06:34,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:35,877 INFO L124 PetriNetUnfolderBase]: 3149/5351 cut-off events. [2024-06-21 16:06:35,878 INFO L125 PetriNetUnfolderBase]: For 1182054/1182060 co-relation queries the response was YES. [2024-06-21 16:06:35,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48201 conditions, 5351 events. 3149/5351 cut-off events. For 1182054/1182060 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 36030 event pairs, 609 based on Foata normal form. 6/5347 useless extension candidates. Maximal degree in co-relation 47977. Up to 4639 conditions per place. [2024-06-21 16:06:35,964 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 595 selfloop transitions, 93 changer transitions 0/696 dead transitions. [2024-06-21 16:06:35,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 696 transitions, 13527 flow [2024-06-21 16:06:35,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:06:35,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:06:35,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 16:06:35,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-21 16:06:35,965 INFO L175 Difference]: Start difference. First operand has 497 places, 673 transitions, 12057 flow. Second operand 7 states and 166 transitions. [2024-06-21 16:06:35,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 696 transitions, 13527 flow [2024-06-21 16:06:44,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 696 transitions, 13054 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 16:06:44,533 INFO L231 Difference]: Finished difference. Result has 498 places, 675 transitions, 11801 flow [2024-06-21 16:06:44,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11584, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11801, PETRI_PLACES=498, PETRI_TRANSITIONS=675} [2024-06-21 16:06:44,534 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 456 predicate places. [2024-06-21 16:06:44,534 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 675 transitions, 11801 flow [2024-06-21 16:06:44,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:44,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:44,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:44,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-21 16:06:44,535 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)] === [2024-06-21 16:06:44,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:44,535 INFO L85 PathProgramCache]: Analyzing trace with hash 508615591, now seen corresponding path program 8 times [2024-06-21 16:06:44,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:44,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961250919] [2024-06-21 16:06:44,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:44,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:44,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:44,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961250919] [2024-06-21 16:06:44,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961250919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:44,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:44,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:06:44,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548128813] [2024-06-21 16:06:44,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:44,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:06:44,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:44,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:06:44,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:06:44,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:06:44,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 675 transitions, 11801 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:44,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:44,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:06:44,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:45,951 INFO L124 PetriNetUnfolderBase]: 3157/5379 cut-off events. [2024-06-21 16:06:45,952 INFO L125 PetriNetUnfolderBase]: For 1194216/1194222 co-relation queries the response was YES. [2024-06-21 16:06:46,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48065 conditions, 5379 events. 3157/5379 cut-off events. For 1194216/1194222 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 36387 event pairs, 527 based on Foata normal form. 6/5375 useless extension candidates. Maximal degree in co-relation 47840. Up to 4442 conditions per place. [2024-06-21 16:06:46,032 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 587 selfloop transitions, 117 changer transitions 0/712 dead transitions. [2024-06-21 16:06:46,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 712 transitions, 14025 flow [2024-06-21 16:06:46,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:06:46,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:06:46,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 16:06:46,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-21 16:06:46,033 INFO L175 Difference]: Start difference. First operand has 498 places, 675 transitions, 11801 flow. Second operand 7 states and 173 transitions. [2024-06-21 16:06:46,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 712 transitions, 14025 flow [2024-06-21 16:06:54,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 712 transitions, 13875 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 16:06:54,403 INFO L231 Difference]: Finished difference. Result has 502 places, 684 transitions, 12083 flow [2024-06-21 16:06:54,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11651, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12083, PETRI_PLACES=502, PETRI_TRANSITIONS=684} [2024-06-21 16:06:54,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-21 16:06:54,404 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 684 transitions, 12083 flow [2024-06-21 16:06:54,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:54,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:54,404 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] [2024-06-21 16:06:54,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-21 16:06:54,405 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)] === [2024-06-21 16:06:54,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:54,405 INFO L85 PathProgramCache]: Analyzing trace with hash 795918631, now seen corresponding path program 9 times [2024-06-21 16:06:54,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:54,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117916802] [2024-06-21 16:06:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:54,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:54,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:54,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117916802] [2024-06-21 16:06:54,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117916802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:54,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:54,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:06:54,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217112313] [2024-06-21 16:06:54,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:54,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:06:54,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:54,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:06:54,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:06:54,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:06:54,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 684 transitions, 12083 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:54,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:54,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:06:54,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:55,884 INFO L124 PetriNetUnfolderBase]: 3165/5392 cut-off events. [2024-06-21 16:06:55,884 INFO L125 PetriNetUnfolderBase]: For 1211981/1211987 co-relation queries the response was YES. [2024-06-21 16:06:55,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48720 conditions, 5392 events. 3165/5392 cut-off events. For 1211981/1211987 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 36386 event pairs, 533 based on Foata normal form. 6/5388 useless extension candidates. Maximal degree in co-relation 48493. Up to 4450 conditions per place. [2024-06-21 16:06:55,965 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 584 selfloop transitions, 119 changer transitions 0/711 dead transitions. [2024-06-21 16:06:55,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 711 transitions, 13928 flow [2024-06-21 16:06:55,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:06:55,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:06:55,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 16:06:55,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-21 16:06:55,966 INFO L175 Difference]: Start difference. First operand has 502 places, 684 transitions, 12083 flow. Second operand 7 states and 169 transitions. [2024-06-21 16:06:55,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 711 transitions, 13928 flow [2024-06-21 16:07:05,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 711 transitions, 13712 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-21 16:07:05,845 INFO L231 Difference]: Finished difference. Result has 507 places, 687 transitions, 12175 flow [2024-06-21 16:07:05,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11897, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12175, PETRI_PLACES=507, PETRI_TRANSITIONS=687} [2024-06-21 16:07:05,846 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 465 predicate places. [2024-06-21 16:07:05,846 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 687 transitions, 12175 flow [2024-06-21 16:07:05,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:05,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:05,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:05,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-21 16:07:05,847 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)] === [2024-06-21 16:07:05,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:05,847 INFO L85 PathProgramCache]: Analyzing trace with hash 909422341, now seen corresponding path program 10 times [2024-06-21 16:07:05,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:05,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193713789] [2024-06-21 16:07:05,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:05,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:05,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:05,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193713789] [2024-06-21 16:07:05,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193713789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:05,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:05,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:07:05,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903089868] [2024-06-21 16:07:05,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:05,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:07:05,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:05,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:07:05,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:07:05,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:07:05,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 687 transitions, 12175 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:05,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:05,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:07:05,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:07,343 INFO L124 PetriNetUnfolderBase]: 3186/5418 cut-off events. [2024-06-21 16:07:07,343 INFO L125 PetriNetUnfolderBase]: For 1248169/1248175 co-relation queries the response was YES. [2024-06-21 16:07:07,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49270 conditions, 5418 events. 3186/5418 cut-off events. For 1248169/1248175 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 36546 event pairs, 614 based on Foata normal form. 6/5414 useless extension candidates. Maximal degree in co-relation 49041. Up to 4665 conditions per place. [2024-06-21 16:07:07,417 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 603 selfloop transitions, 101 changer transitions 0/712 dead transitions. [2024-06-21 16:07:07,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 712 transitions, 14024 flow [2024-06-21 16:07:07,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:07:07,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:07:07,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 16:07:07,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-21 16:07:07,419 INFO L175 Difference]: Start difference. First operand has 507 places, 687 transitions, 12175 flow. Second operand 7 states and 165 transitions. [2024-06-21 16:07:07,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 712 transitions, 14024 flow [2024-06-21 16:07:16,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 712 transitions, 13819 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 16:07:16,811 INFO L231 Difference]: Finished difference. Result has 512 places, 692 transitions, 12276 flow [2024-06-21 16:07:16,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11975, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12276, PETRI_PLACES=512, PETRI_TRANSITIONS=692} [2024-06-21 16:07:16,812 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 470 predicate places. [2024-06-21 16:07:16,812 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 692 transitions, 12276 flow [2024-06-21 16:07:16,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:16,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:16,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:16,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-21 16:07:16,813 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)] === [2024-06-21 16:07:16,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:16,813 INFO L85 PathProgramCache]: Analyzing trace with hash 899899141, now seen corresponding path program 11 times [2024-06-21 16:07:16,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:16,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312070810] [2024-06-21 16:07:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:16,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:16,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:16,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:16,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312070810] [2024-06-21 16:07:16,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312070810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:16,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:16,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:07:16,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983533782] [2024-06-21 16:07:16,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:16,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:07:16,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:16,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:07:16,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:07:16,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:07:16,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 692 transitions, 12276 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:16,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:16,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:07:16,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:18,329 INFO L124 PetriNetUnfolderBase]: 3181/5415 cut-off events. [2024-06-21 16:07:18,330 INFO L125 PetriNetUnfolderBase]: For 1241623/1241629 co-relation queries the response was YES. [2024-06-21 16:07:18,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48994 conditions, 5415 events. 3181/5415 cut-off events. For 1241623/1241629 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 36673 event pairs, 617 based on Foata normal form. 6/5411 useless extension candidates. Maximal degree in co-relation 48763. Up to 4687 conditions per place. [2024-06-21 16:07:18,405 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 608 selfloop transitions, 94 changer transitions 0/710 dead transitions. [2024-06-21 16:07:18,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 710 transitions, 13740 flow [2024-06-21 16:07:18,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:07:18,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:07:18,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 16:07:18,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-21 16:07:18,407 INFO L175 Difference]: Start difference. First operand has 512 places, 692 transitions, 12276 flow. Second operand 7 states and 163 transitions. [2024-06-21 16:07:18,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 710 transitions, 13740 flow [2024-06-21 16:07:26,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 710 transitions, 13573 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 16:07:26,885 INFO L231 Difference]: Finished difference. Result has 516 places, 692 transitions, 12302 flow [2024-06-21 16:07:26,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12109, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12302, PETRI_PLACES=516, PETRI_TRANSITIONS=692} [2024-06-21 16:07:26,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 474 predicate places. [2024-06-21 16:07:26,885 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 692 transitions, 12302 flow [2024-06-21 16:07:26,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:26,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:26,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:26,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-21 16:07:26,886 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)] === [2024-06-21 16:07:26,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:26,886 INFO L85 PathProgramCache]: Analyzing trace with hash 371898437, now seen corresponding path program 12 times [2024-06-21 16:07:26,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:26,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13226709] [2024-06-21 16:07:26,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:26,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:26,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:26,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:26,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13226709] [2024-06-21 16:07:26,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13226709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:26,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:26,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:07:26,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729814771] [2024-06-21 16:07:26,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:26,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:07:26,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:26,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:07:26,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:07:27,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:07:27,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 692 transitions, 12302 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:27,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:27,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:07:27,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:28,442 INFO L124 PetriNetUnfolderBase]: 3189/5411 cut-off events. [2024-06-21 16:07:28,442 INFO L125 PetriNetUnfolderBase]: For 1256497/1256497 co-relation queries the response was YES. [2024-06-21 16:07:28,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49132 conditions, 5411 events. 3189/5411 cut-off events. For 1256497/1256497 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 36492 event pairs, 612 based on Foata normal form. 2/5398 useless extension candidates. Maximal degree in co-relation 48900. Up to 4699 conditions per place. [2024-06-21 16:07:28,517 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 607 selfloop transitions, 98 changer transitions 0/713 dead transitions. [2024-06-21 16:07:28,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 713 transitions, 13812 flow [2024-06-21 16:07:28,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:07:28,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:07:28,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 16:07:28,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-21 16:07:28,518 INFO L175 Difference]: Start difference. First operand has 516 places, 692 transitions, 12302 flow. Second operand 8 states and 183 transitions. [2024-06-21 16:07:28,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 713 transitions, 13812 flow [2024-06-21 16:07:38,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 713 transitions, 13623 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 16:07:38,979 INFO L231 Difference]: Finished difference. Result has 519 places, 694 transitions, 12356 flow [2024-06-21 16:07:38,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12113, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12356, PETRI_PLACES=519, PETRI_TRANSITIONS=694} [2024-06-21 16:07:38,979 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 477 predicate places. [2024-06-21 16:07:38,980 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 694 transitions, 12356 flow [2024-06-21 16:07:38,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:38,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:38,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:38,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-21 16:07:38,980 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)] === [2024-06-21 16:07:38,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:38,980 INFO L85 PathProgramCache]: Analyzing trace with hash 867335051, now seen corresponding path program 13 times [2024-06-21 16:07:38,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:38,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718657109] [2024-06-21 16:07:38,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:38,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:39,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:39,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718657109] [2024-06-21 16:07:39,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718657109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:39,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:39,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:07:39,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800719801] [2024-06-21 16:07:39,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:39,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:07:39,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:39,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:07:39,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:07:39,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:07:39,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 694 transitions, 12356 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:39,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:39,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:07:39,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:40,581 INFO L124 PetriNetUnfolderBase]: 3210/5444 cut-off events. [2024-06-21 16:07:40,581 INFO L125 PetriNetUnfolderBase]: For 1295150/1295150 co-relation queries the response was YES. [2024-06-21 16:07:40,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49792 conditions, 5444 events. 3210/5444 cut-off events. For 1295150/1295150 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 36732 event pairs, 611 based on Foata normal form. 2/5429 useless extension candidates. Maximal degree in co-relation 49559. Up to 4695 conditions per place. [2024-06-21 16:07:40,662 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 605 selfloop transitions, 107 changer transitions 0/720 dead transitions. [2024-06-21 16:07:40,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 720 transitions, 14236 flow [2024-06-21 16:07:40,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:07:40,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:07:40,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 16:07:40,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-21 16:07:40,664 INFO L175 Difference]: Start difference. First operand has 519 places, 694 transitions, 12356 flow. Second operand 8 states and 185 transitions. [2024-06-21 16:07:40,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 720 transitions, 14236 flow [2024-06-21 16:07:50,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 720 transitions, 14021 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 16:07:50,820 INFO L231 Difference]: Finished difference. Result has 522 places, 699 transitions, 12469 flow [2024-06-21 16:07:50,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12141, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12469, PETRI_PLACES=522, PETRI_TRANSITIONS=699} [2024-06-21 16:07:50,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 480 predicate places. [2024-06-21 16:07:50,821 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 699 transitions, 12469 flow [2024-06-21 16:07:50,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:50,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:50,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:50,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-21 16:07:50,821 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)] === [2024-06-21 16:07:50,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:50,822 INFO L85 PathProgramCache]: Analyzing trace with hash 601311341, now seen corresponding path program 14 times [2024-06-21 16:07:50,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:50,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853400412] [2024-06-21 16:07:50,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:50,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:50,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:50,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:50,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853400412] [2024-06-21 16:07:50,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853400412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:50,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:50,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:07:50,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712800294] [2024-06-21 16:07:50,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:50,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:07:50,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:50,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:07:50,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:07:50,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:07:50,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 699 transitions, 12469 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:50,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:50,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:07:50,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:52,420 INFO L124 PetriNetUnfolderBase]: 3205/5447 cut-off events. [2024-06-21 16:07:52,421 INFO L125 PetriNetUnfolderBase]: For 1288178/1288178 co-relation queries the response was YES. [2024-06-21 16:07:52,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49620 conditions, 5447 events. 3205/5447 cut-off events. For 1288178/1288178 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 36799 event pairs, 618 based on Foata normal form. 2/5434 useless extension candidates. Maximal degree in co-relation 49385. Up to 4723 conditions per place. [2024-06-21 16:07:52,500 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 613 selfloop transitions, 99 changer transitions 0/720 dead transitions. [2024-06-21 16:07:52,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 720 transitions, 13959 flow [2024-06-21 16:07:52,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:52,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:52,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-21 16:07:52,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390243902439025 [2024-06-21 16:07:52,501 INFO L175 Difference]: Start difference. First operand has 522 places, 699 transitions, 12469 flow. Second operand 10 states and 221 transitions. [2024-06-21 16:07:52,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 720 transitions, 13959 flow [2024-06-21 16:08:02,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 720 transitions, 13721 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 16:08:02,590 INFO L231 Difference]: Finished difference. Result has 527 places, 699 transitions, 12434 flow [2024-06-21 16:08:02,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12231, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12434, PETRI_PLACES=527, PETRI_TRANSITIONS=699} [2024-06-21 16:08:02,591 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 485 predicate places. [2024-06-21 16:08:02,591 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 699 transitions, 12434 flow [2024-06-21 16:08:02,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:02,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:02,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:02,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-21 16:08:02,592 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:02,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:02,592 INFO L85 PathProgramCache]: Analyzing trace with hash 750432929, now seen corresponding path program 6 times [2024-06-21 16:08:02,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:02,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005551483] [2024-06-21 16:08:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:02,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:02,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:02,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005551483] [2024-06-21 16:08:02,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005551483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:02,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:02,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:08:02,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941847358] [2024-06-21 16:08:02,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:02,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:08:02,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:02,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:08:02,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:08:02,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:08:02,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 699 transitions, 12434 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:02,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:02,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:08:02,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:04,221 INFO L124 PetriNetUnfolderBase]: 3213/5469 cut-off events. [2024-06-21 16:08:04,221 INFO L125 PetriNetUnfolderBase]: For 1304731/1304741 co-relation queries the response was YES. [2024-06-21 16:08:04,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49809 conditions, 5469 events. 3213/5469 cut-off events. For 1304731/1304741 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 37102 event pairs, 614 based on Foata normal form. 2/5465 useless extension candidates. Maximal degree in co-relation 49573. Up to 4860 conditions per place. [2024-06-21 16:08:04,301 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 659 selfloop transitions, 50 changer transitions 0/717 dead transitions. [2024-06-21 16:08:04,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 717 transitions, 13976 flow [2024-06-21 16:08:04,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:08:04,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:08:04,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-21 16:08:04,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-21 16:08:04,302 INFO L175 Difference]: Start difference. First operand has 527 places, 699 transitions, 12434 flow. Second operand 8 states and 181 transitions. [2024-06-21 16:08:04,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 717 transitions, 13976 flow [2024-06-21 16:08:14,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 717 transitions, 13773 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 16:08:14,335 INFO L231 Difference]: Finished difference. Result has 527 places, 701 transitions, 12420 flow [2024-06-21 16:08:14,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12231, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12420, PETRI_PLACES=527, PETRI_TRANSITIONS=701} [2024-06-21 16:08:14,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 485 predicate places. [2024-06-21 16:08:14,336 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 701 transitions, 12420 flow [2024-06-21 16:08:14,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:14,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:14,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:14,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-21 16:08:14,336 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:14,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:14,336 INFO L85 PathProgramCache]: Analyzing trace with hash 765670049, now seen corresponding path program 7 times [2024-06-21 16:08:14,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:14,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919653466] [2024-06-21 16:08:14,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:14,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:14,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:14,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:14,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919653466] [2024-06-21 16:08:14,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919653466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:14,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:14,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:08:14,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243252956] [2024-06-21 16:08:14,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:14,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:08:14,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:14,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:08:14,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:08:14,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:08:14,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 701 transitions, 12420 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:14,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:14,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:08:14,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:15,866 INFO L124 PetriNetUnfolderBase]: 3221/5475 cut-off events. [2024-06-21 16:08:15,866 INFO L125 PetriNetUnfolderBase]: For 1321927/1321937 co-relation queries the response was YES. [2024-06-21 16:08:15,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50012 conditions, 5475 events. 3221/5475 cut-off events. For 1321927/1321937 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 37095 event pairs, 608 based on Foata normal form. 2/5471 useless extension candidates. Maximal degree in co-relation 49775. Up to 4858 conditions per place. [2024-06-21 16:08:15,945 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 659 selfloop transitions, 54 changer transitions 0/721 dead transitions. [2024-06-21 16:08:15,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 721 transitions, 13978 flow [2024-06-21 16:08:15,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:08:15,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:08:15,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-21 16:08:15,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-21 16:08:15,946 INFO L175 Difference]: Start difference. First operand has 527 places, 701 transitions, 12420 flow. Second operand 9 states and 201 transitions. [2024-06-21 16:08:15,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 721 transitions, 13978 flow [2024-06-21 16:08:26,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 721 transitions, 13805 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 16:08:26,112 INFO L231 Difference]: Finished difference. Result has 530 places, 703 transitions, 12448 flow [2024-06-21 16:08:26,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12247, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12448, PETRI_PLACES=530, PETRI_TRANSITIONS=703} [2024-06-21 16:08:26,113 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 488 predicate places. [2024-06-21 16:08:26,113 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 703 transitions, 12448 flow [2024-06-21 16:08:26,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:26,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:26,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:26,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-21 16:08:26,114 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:26,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:26,114 INFO L85 PathProgramCache]: Analyzing trace with hash 322336259, now seen corresponding path program 8 times [2024-06-21 16:08:26,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:26,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539705371] [2024-06-21 16:08:26,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:26,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:26,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:26,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539705371] [2024-06-21 16:08:26,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539705371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:26,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:26,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:08:26,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641394481] [2024-06-21 16:08:26,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:26,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:08:26,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:26,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:08:26,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:08:26,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:08:26,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 703 transitions, 12448 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:26,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:26,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:08:26,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:27,627 INFO L124 PetriNetUnfolderBase]: 3229/5474 cut-off events. [2024-06-21 16:08:27,627 INFO L125 PetriNetUnfolderBase]: For 1339805/1339805 co-relation queries the response was YES. [2024-06-21 16:08:27,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50244 conditions, 5474 events. 3229/5474 cut-off events. For 1339805/1339805 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 36999 event pairs, 652 based on Foata normal form. 2/5452 useless extension candidates. Maximal degree in co-relation 50006. Up to 4613 conditions per place. [2024-06-21 16:08:27,709 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 516 selfloop transitions, 200 changer transitions 0/724 dead transitions. [2024-06-21 16:08:27,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 724 transitions, 14030 flow [2024-06-21 16:08:27,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:08:27,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:08:27,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 16:08:27,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-21 16:08:27,710 INFO L175 Difference]: Start difference. First operand has 530 places, 703 transitions, 12448 flow. Second operand 8 states and 186 transitions. [2024-06-21 16:08:27,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 724 transitions, 14030 flow [2024-06-21 16:08:38,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 724 transitions, 13845 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 16:08:38,804 INFO L231 Difference]: Finished difference. Result has 531 places, 705 transitions, 12760 flow [2024-06-21 16:08:38,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12263, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12760, PETRI_PLACES=531, PETRI_TRANSITIONS=705} [2024-06-21 16:08:38,805 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 489 predicate places. [2024-06-21 16:08:38,805 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 705 transitions, 12760 flow [2024-06-21 16:08:38,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:38,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:38,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:38,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-21 16:08:38,806 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:38,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:38,806 INFO L85 PathProgramCache]: Analyzing trace with hash 401353383, now seen corresponding path program 15 times [2024-06-21 16:08:38,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:38,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942351227] [2024-06-21 16:08:38,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:38,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:38,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:38,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942351227] [2024-06-21 16:08:38,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942351227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:38,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:38,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:08:38,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709276013] [2024-06-21 16:08:38,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:38,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:08:38,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:38,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:08:38,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:08:38,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:08:38,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 705 transitions, 12760 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:38,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:38,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:08:38,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:40,360 INFO L124 PetriNetUnfolderBase]: 3224/5477 cut-off events. [2024-06-21 16:08:40,360 INFO L125 PetriNetUnfolderBase]: For 1328676/1328678 co-relation queries the response was YES. [2024-06-21 16:08:40,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50249 conditions, 5477 events. 3224/5477 cut-off events. For 1328676/1328678 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 37057 event pairs, 571 based on Foata normal form. 2/5477 useless extension candidates. Maximal degree in co-relation 50010. Up to 4508 conditions per place. [2024-06-21 16:08:40,445 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 621 selfloop transitions, 112 changer transitions 0/741 dead transitions. [2024-06-21 16:08:40,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 741 transitions, 14362 flow [2024-06-21 16:08:40,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:08:40,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:08:40,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 16:08:40,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 16:08:40,446 INFO L175 Difference]: Start difference. First operand has 531 places, 705 transitions, 12760 flow. Second operand 8 states and 205 transitions. [2024-06-21 16:08:40,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 741 transitions, 14362 flow [2024-06-21 16:08:49,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 741 transitions, 13875 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 16:08:49,097 INFO L231 Difference]: Finished difference. Result has 533 places, 705 transitions, 12523 flow [2024-06-21 16:08:49,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12273, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12523, PETRI_PLACES=533, PETRI_TRANSITIONS=705} [2024-06-21 16:08:49,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 491 predicate places. [2024-06-21 16:08:49,097 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 705 transitions, 12523 flow [2024-06-21 16:08:49,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:49,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:49,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:49,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-21 16:08:49,098 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:49,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:49,098 INFO L85 PathProgramCache]: Analyzing trace with hash 657853893, now seen corresponding path program 16 times [2024-06-21 16:08:49,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:49,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773397840] [2024-06-21 16:08:49,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:49,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:49,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:49,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773397840] [2024-06-21 16:08:49,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773397840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:49,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:49,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:08:49,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463804027] [2024-06-21 16:08:49,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:49,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:08:49,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:49,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:08:49,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:08:49,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:08:49,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 705 transitions, 12523 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:49,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:49,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:08:49,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:50,627 INFO L124 PetriNetUnfolderBase]: 3219/5468 cut-off events. [2024-06-21 16:08:50,628 INFO L125 PetriNetUnfolderBase]: For 1318764/1318764 co-relation queries the response was YES. [2024-06-21 16:08:50,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49801 conditions, 5468 events. 3219/5468 cut-off events. For 1318764/1318764 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 36993 event pairs, 589 based on Foata normal form. 2/5457 useless extension candidates. Maximal degree in co-relation 49561. Up to 4684 conditions per place. [2024-06-21 16:08:50,711 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 619 selfloop transitions, 105 changer transitions 0/732 dead transitions. [2024-06-21 16:08:50,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 732 transitions, 14063 flow [2024-06-21 16:08:50,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:08:50,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:08:50,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 16:08:50,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-21 16:08:50,713 INFO L175 Difference]: Start difference. First operand has 533 places, 705 transitions, 12523 flow. Second operand 7 states and 177 transitions. [2024-06-21 16:08:50,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 732 transitions, 14063 flow [2024-06-21 16:08:59,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 732 transitions, 13854 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 16:08:59,900 INFO L231 Difference]: Finished difference. Result has 534 places, 705 transitions, 12533 flow [2024-06-21 16:08:59,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12314, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12533, PETRI_PLACES=534, PETRI_TRANSITIONS=705} [2024-06-21 16:08:59,901 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 492 predicate places. [2024-06-21 16:08:59,901 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 705 transitions, 12533 flow [2024-06-21 16:08:59,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:59,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:59,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:59,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-21 16:08:59,901 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:59,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:59,902 INFO L85 PathProgramCache]: Analyzing trace with hash 667377093, now seen corresponding path program 17 times [2024-06-21 16:08:59,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:59,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457611732] [2024-06-21 16:08:59,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:59,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:59,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:59,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457611732] [2024-06-21 16:08:59,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457611732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:59,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:59,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:08:59,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718881177] [2024-06-21 16:08:59,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:59,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:08:59,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:59,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:08:59,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:09:00,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:09:00,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 705 transitions, 12533 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:00,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:00,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:09:00,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:01,424 INFO L124 PetriNetUnfolderBase]: 3214/5478 cut-off events. [2024-06-21 16:09:01,424 INFO L125 PetriNetUnfolderBase]: For 1279082/1279082 co-relation queries the response was YES. [2024-06-21 16:09:01,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49297 conditions, 5478 events. 3214/5478 cut-off events. For 1279082/1279082 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 37150 event pairs, 504 based on Foata normal form. 2/5467 useless extension candidates. Maximal degree in co-relation 49057. Up to 4412 conditions per place. [2024-06-21 16:09:01,515 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 608 selfloop transitions, 120 changer transitions 0/736 dead transitions. [2024-06-21 16:09:01,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 736 transitions, 14109 flow [2024-06-21 16:09:01,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:09:01,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:09:01,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 16:09:01,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-21 16:09:01,517 INFO L175 Difference]: Start difference. First operand has 534 places, 705 transitions, 12533 flow. Second operand 7 states and 181 transitions. [2024-06-21 16:09:01,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 736 transitions, 14109 flow [2024-06-21 16:09:13,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 736 transitions, 13864 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 16:09:13,152 INFO L231 Difference]: Finished difference. Result has 535 places, 705 transitions, 12536 flow [2024-06-21 16:09:13,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12288, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12536, PETRI_PLACES=535, PETRI_TRANSITIONS=705} [2024-06-21 16:09:13,153 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 493 predicate places. [2024-06-21 16:09:13,153 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 705 transitions, 12536 flow [2024-06-21 16:09:13,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:13,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:13,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:13,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-21 16:09:13,155 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:13,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:13,155 INFO L85 PathProgramCache]: Analyzing trace with hash 401538081, now seen corresponding path program 9 times [2024-06-21 16:09:13,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:13,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651826852] [2024-06-21 16:09:13,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:13,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:13,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:13,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:13,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651826852] [2024-06-21 16:09:13,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651826852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:13,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:13,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:13,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168504852] [2024-06-21 16:09:13,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:13,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:13,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:13,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:13,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:13,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:09:13,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 705 transitions, 12536 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:13,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:13,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:09:13,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:14,662 INFO L124 PetriNetUnfolderBase]: 3222/5458 cut-off events. [2024-06-21 16:09:14,662 INFO L125 PetriNetUnfolderBase]: For 1296762/1296762 co-relation queries the response was YES. [2024-06-21 16:09:14,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49639 conditions, 5458 events. 3222/5458 cut-off events. For 1296762/1296762 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 36866 event pairs, 589 based on Foata normal form. 2/5447 useless extension candidates. Maximal degree in co-relation 49398. Up to 4577 conditions per place. [2024-06-21 16:09:14,749 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 535 selfloop transitions, 190 changer transitions 0/733 dead transitions. [2024-06-21 16:09:14,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 733 transitions, 14482 flow [2024-06-21 16:09:14,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:09:14,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:09:14,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 16:09:14,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-21 16:09:14,750 INFO L175 Difference]: Start difference. First operand has 535 places, 705 transitions, 12536 flow. Second operand 8 states and 197 transitions. [2024-06-21 16:09:14,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 733 transitions, 14482 flow [2024-06-21 16:09:25,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 733 transitions, 14231 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 16:09:25,501 INFO L231 Difference]: Finished difference. Result has 536 places, 707 transitions, 12766 flow [2024-06-21 16:09:25,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12285, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12766, PETRI_PLACES=536, PETRI_TRANSITIONS=707} [2024-06-21 16:09:25,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 494 predicate places. [2024-06-21 16:09:25,502 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 707 transitions, 12766 flow [2024-06-21 16:09:25,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:25,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:25,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:25,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-21 16:09:25,503 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:25,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:25,503 INFO L85 PathProgramCache]: Analyzing trace with hash -623922143, now seen corresponding path program 10 times [2024-06-21 16:09:25,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:25,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839643463] [2024-06-21 16:09:25,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:25,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:25,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:25,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839643463] [2024-06-21 16:09:25,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839643463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:25,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:25,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:25,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015028537] [2024-06-21 16:09:25,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:25,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:25,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:25,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:25,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:25,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:09:25,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 707 transitions, 12766 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:25,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:25,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:09:25,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:27,075 INFO L124 PetriNetUnfolderBase]: 3258/5540 cut-off events. [2024-06-21 16:09:27,076 INFO L125 PetriNetUnfolderBase]: For 1425145/1425147 co-relation queries the response was YES. [2024-06-21 16:09:27,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50694 conditions, 5540 events. 3258/5540 cut-off events. For 1425145/1425147 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 37529 event pairs, 585 based on Foata normal form. 10/5548 useless extension candidates. Maximal degree in co-relation 50454. Up to 4563 conditions per place. [2024-06-21 16:09:27,165 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 545 selfloop transitions, 191 changer transitions 0/744 dead transitions. [2024-06-21 16:09:27,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 744 transitions, 14788 flow [2024-06-21 16:09:27,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:27,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:27,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-21 16:09:27,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6151761517615176 [2024-06-21 16:09:27,166 INFO L175 Difference]: Start difference. First operand has 536 places, 707 transitions, 12766 flow. Second operand 9 states and 227 transitions. [2024-06-21 16:09:27,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 744 transitions, 14788 flow [2024-06-21 16:09:38,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 744 transitions, 14323 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 16:09:38,022 INFO L231 Difference]: Finished difference. Result has 539 places, 709 transitions, 12795 flow [2024-06-21 16:09:38,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12301, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12795, PETRI_PLACES=539, PETRI_TRANSITIONS=709} [2024-06-21 16:09:38,022 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 497 predicate places. [2024-06-21 16:09:38,023 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 709 transitions, 12795 flow [2024-06-21 16:09:38,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:38,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:38,023 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] [2024-06-21 16:09:38,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-21 16:09:38,023 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:38,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:38,023 INFO L85 PathProgramCache]: Analyzing trace with hash 414050301, now seen corresponding path program 11 times [2024-06-21 16:09:38,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:38,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011163306] [2024-06-21 16:09:38,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:38,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:38,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:38,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011163306] [2024-06-21 16:09:38,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011163306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:38,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:38,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:38,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542603347] [2024-06-21 16:09:38,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:38,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:38,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:38,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:38,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:38,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:09:38,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 709 transitions, 12795 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:38,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:38,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:09:38,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:39,519 INFO L124 PetriNetUnfolderBase]: 3266/5553 cut-off events. [2024-06-21 16:09:39,519 INFO L125 PetriNetUnfolderBase]: For 1343453/1343463 co-relation queries the response was YES. [2024-06-21 16:09:39,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50998 conditions, 5553 events. 3266/5553 cut-off events. For 1343453/1343463 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 37687 event pairs, 602 based on Foata normal form. 2/5553 useless extension candidates. Maximal degree in co-relation 50757. Up to 4964 conditions per place. [2024-06-21 16:09:39,606 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 689 selfloop transitions, 33 changer transitions 0/730 dead transitions. [2024-06-21 16:09:39,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 730 transitions, 14393 flow [2024-06-21 16:09:39,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:09:39,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:09:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 16:09:39,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-21 16:09:39,607 INFO L175 Difference]: Start difference. First operand has 539 places, 709 transitions, 12795 flow. Second operand 8 states and 185 transitions. [2024-06-21 16:09:39,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 730 transitions, 14393 flow [2024-06-21 16:09:52,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 730 transitions, 13941 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 16:09:52,791 INFO L231 Difference]: Finished difference. Result has 540 places, 711 transitions, 12518 flow [2024-06-21 16:09:52,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12343, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12518, PETRI_PLACES=540, PETRI_TRANSITIONS=711} [2024-06-21 16:09:52,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 498 predicate places. [2024-06-21 16:09:52,792 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 711 transitions, 12518 flow [2024-06-21 16:09:52,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:52,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:52,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:52,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-21 16:09:52,793 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:52,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:52,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1311981539, now seen corresponding path program 12 times [2024-06-21 16:09:52,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:52,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417702823] [2024-06-21 16:09:52,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:52,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:52,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:52,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417702823] [2024-06-21 16:09:52,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417702823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:52,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:52,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:52,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698488894] [2024-06-21 16:09:52,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:52,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:52,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:52,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:52,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:52,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:09:52,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 711 transitions, 12518 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:52,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:52,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:09:52,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:54,296 INFO L124 PetriNetUnfolderBase]: 3274/5562 cut-off events. [2024-06-21 16:09:54,296 INFO L125 PetriNetUnfolderBase]: For 1347581/1347583 co-relation queries the response was YES. [2024-06-21 16:09:54,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50360 conditions, 5562 events. 3274/5562 cut-off events. For 1347581/1347583 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 37714 event pairs, 597 based on Foata normal form. 2/5561 useless extension candidates. Maximal degree in co-relation 50118. Up to 4852 conditions per place. [2024-06-21 16:09:54,385 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 647 selfloop transitions, 84 changer transitions 0/739 dead transitions. [2024-06-21 16:09:54,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 739 transitions, 14170 flow [2024-06-21 16:09:54,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:09:54,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:09:54,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 16:09:54,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-21 16:09:54,387 INFO L175 Difference]: Start difference. First operand has 540 places, 711 transitions, 12518 flow. Second operand 7 states and 177 transitions. [2024-06-21 16:09:54,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 739 transitions, 14170 flow [2024-06-21 16:10:04,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 739 transitions, 14011 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-21 16:10:04,521 INFO L231 Difference]: Finished difference. Result has 541 places, 713 transitions, 12640 flow [2024-06-21 16:10:04,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12359, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12640, PETRI_PLACES=541, PETRI_TRANSITIONS=713} [2024-06-21 16:10:04,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 499 predicate places. [2024-06-21 16:10:04,522 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 713 transitions, 12640 flow [2024-06-21 16:10:04,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:04,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:04,522 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] [2024-06-21 16:10:04,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-21 16:10:04,522 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:04,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:04,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1303410659, now seen corresponding path program 13 times [2024-06-21 16:10:04,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:04,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760319418] [2024-06-21 16:10:04,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:04,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:04,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:04,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760319418] [2024-06-21 16:10:04,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760319418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:04,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:04,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:04,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417704207] [2024-06-21 16:10:04,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:04,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:04,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:04,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:04,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:04,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:10:04,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 713 transitions, 12640 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:04,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:04,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:10:04,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:06,157 INFO L124 PetriNetUnfolderBase]: 3341/5653 cut-off events. [2024-06-21 16:10:06,157 INFO L125 PetriNetUnfolderBase]: For 1507886/1507888 co-relation queries the response was YES. [2024-06-21 16:10:06,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53342 conditions, 5653 events. 3341/5653 cut-off events. For 1507886/1507888 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 38306 event pairs, 596 based on Foata normal form. 2/5653 useless extension candidates. Maximal degree in co-relation 53099. Up to 4793 conditions per place. [2024-06-21 16:10:06,253 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 651 selfloop transitions, 89 changer transitions 0/748 dead transitions. [2024-06-21 16:10:06,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 748 transitions, 14786 flow [2024-06-21 16:10:06,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:10:06,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:10:06,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 16:10:06,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 16:10:06,254 INFO L175 Difference]: Start difference. First operand has 541 places, 713 transitions, 12640 flow. Second operand 7 states and 182 transitions. [2024-06-21 16:10:06,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 748 transitions, 14786 flow [2024-06-21 16:10:16,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 748 transitions, 14521 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-21 16:10:16,853 INFO L231 Difference]: Finished difference. Result has 544 places, 717 transitions, 12752 flow [2024-06-21 16:10:16,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12375, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12752, PETRI_PLACES=544, PETRI_TRANSITIONS=717} [2024-06-21 16:10:16,853 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 502 predicate places. [2024-06-21 16:10:16,854 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 717 transitions, 12752 flow [2024-06-21 16:10:16,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:16,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:16,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:16,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-21 16:10:16,854 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:16,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:16,854 INFO L85 PathProgramCache]: Analyzing trace with hash -396020993, now seen corresponding path program 14 times [2024-06-21 16:10:16,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:16,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721833213] [2024-06-21 16:10:16,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:16,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:16,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:16,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721833213] [2024-06-21 16:10:16,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721833213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:16,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:16,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:16,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600669185] [2024-06-21 16:10:16,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:16,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:16,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:16,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:16,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:17,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:10:17,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 717 transitions, 12752 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:17,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:17,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:10:17,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:18,493 INFO L124 PetriNetUnfolderBase]: 3377/5719 cut-off events. [2024-06-21 16:10:18,493 INFO L125 PetriNetUnfolderBase]: For 1641854/1641856 co-relation queries the response was YES. [2024-06-21 16:10:18,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54452 conditions, 5719 events. 3377/5719 cut-off events. For 1641854/1641856 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 38898 event pairs, 598 based on Foata normal form. 10/5727 useless extension candidates. Maximal degree in co-relation 54207. Up to 4744 conditions per place. [2024-06-21 16:10:18,586 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 556 selfloop transitions, 187 changer transitions 0/751 dead transitions. [2024-06-21 16:10:18,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 751 transitions, 14798 flow [2024-06-21 16:10:18,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:10:18,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:10:18,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-21 16:10:18,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5926829268292683 [2024-06-21 16:10:18,587 INFO L175 Difference]: Start difference. First operand has 544 places, 717 transitions, 12752 flow. Second operand 10 states and 243 transitions. [2024-06-21 16:10:18,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 751 transitions, 14798 flow [2024-06-21 16:10:31,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 751 transitions, 14596 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-21 16:10:31,039 INFO L231 Difference]: Finished difference. Result has 551 places, 719 transitions, 13052 flow [2024-06-21 16:10:31,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12550, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13052, PETRI_PLACES=551, PETRI_TRANSITIONS=719} [2024-06-21 16:10:31,039 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 509 predicate places. [2024-06-21 16:10:31,040 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 719 transitions, 13052 flow [2024-06-21 16:10:31,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:31,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:31,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:31,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-21 16:10:31,040 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:31,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:31,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2020706097, now seen corresponding path program 15 times [2024-06-21 16:10:31,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:31,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728615043] [2024-06-21 16:10:31,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:31,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:31,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:31,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728615043] [2024-06-21 16:10:31,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728615043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:31,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:31,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:31,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397459058] [2024-06-21 16:10:31,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:31,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:31,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:31,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:31,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:31,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:10:31,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 719 transitions, 13052 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:31,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:31,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:10:31,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:32,921 INFO L124 PetriNetUnfolderBase]: 3372/5716 cut-off events. [2024-06-21 16:10:32,922 INFO L125 PetriNetUnfolderBase]: For 1525648/1525650 co-relation queries the response was YES. [2024-06-21 16:10:32,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54424 conditions, 5716 events. 3372/5716 cut-off events. For 1525648/1525650 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 38940 event pairs, 615 based on Foata normal form. 2/5715 useless extension candidates. Maximal degree in co-relation 54177. Up to 4996 conditions per place. [2024-06-21 16:10:33,007 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 652 selfloop transitions, 95 changer transitions 0/755 dead transitions. [2024-06-21 16:10:33,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 755 transitions, 14769 flow [2024-06-21 16:10:33,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:10:33,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:10:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-21 16:10:33,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6043360433604336 [2024-06-21 16:10:33,008 INFO L175 Difference]: Start difference. First operand has 551 places, 719 transitions, 13052 flow. Second operand 9 states and 223 transitions. [2024-06-21 16:10:33,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 755 transitions, 14769 flow [2024-06-21 16:10:44,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 755 transitions, 14309 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-21 16:10:44,063 INFO L231 Difference]: Finished difference. Result has 552 places, 721 transitions, 12905 flow [2024-06-21 16:10:44,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12592, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12905, PETRI_PLACES=552, PETRI_TRANSITIONS=721} [2024-06-21 16:10:44,064 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 510 predicate places. [2024-06-21 16:10:44,064 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 721 transitions, 12905 flow [2024-06-21 16:10:44,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:44,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:44,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:44,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-21 16:10:44,064 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:44,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:44,065 INFO L85 PathProgramCache]: Analyzing trace with hash 814544925, now seen corresponding path program 16 times [2024-06-21 16:10:44,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:44,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270985448] [2024-06-21 16:10:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:44,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:44,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:44,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270985448] [2024-06-21 16:10:44,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270985448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:44,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:44,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:44,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005538527] [2024-06-21 16:10:44,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:44,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:44,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:44,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:44,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:44,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:10:44,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 721 transitions, 12905 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:44,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:44,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:10:44,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:45,712 INFO L124 PetriNetUnfolderBase]: 3380/5726 cut-off events. [2024-06-21 16:10:45,712 INFO L125 PetriNetUnfolderBase]: For 1532953/1532955 co-relation queries the response was YES. [2024-06-21 16:10:45,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53929 conditions, 5726 events. 3380/5726 cut-off events. For 1532953/1532955 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 38967 event pairs, 613 based on Foata normal form. 2/5725 useless extension candidates. Maximal degree in co-relation 53681. Up to 4986 conditions per place. [2024-06-21 16:10:45,811 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 646 selfloop transitions, 101 changer transitions 0/755 dead transitions. [2024-06-21 16:10:45,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 755 transitions, 14619 flow [2024-06-21 16:10:45,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:10:45,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:10:45,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-21 16:10:45,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-21 16:10:45,812 INFO L175 Difference]: Start difference. First operand has 552 places, 721 transitions, 12905 flow. Second operand 9 states and 219 transitions. [2024-06-21 16:10:45,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 755 transitions, 14619 flow [2024-06-21 16:10:58,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 755 transitions, 14335 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-21 16:10:58,524 INFO L231 Difference]: Finished difference. Result has 554 places, 723 transitions, 12950 flow [2024-06-21 16:10:58,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12621, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12950, PETRI_PLACES=554, PETRI_TRANSITIONS=723} [2024-06-21 16:10:58,524 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 512 predicate places. [2024-06-21 16:10:58,524 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 723 transitions, 12950 flow [2024-06-21 16:10:58,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:58,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:58,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:58,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-21 16:10:58,525 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:58,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:58,525 INFO L85 PathProgramCache]: Analyzing trace with hash 454559773, now seen corresponding path program 17 times [2024-06-21 16:10:58,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:58,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756440245] [2024-06-21 16:10:58,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:58,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:58,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:58,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756440245] [2024-06-21 16:10:58,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756440245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:58,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:58,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:58,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535389562] [2024-06-21 16:10:58,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:58,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:58,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:58,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:58,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:58,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-21 16:10:58,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 723 transitions, 12950 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:58,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:58,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-21 16:10:58,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:00,509 INFO L124 PetriNetUnfolderBase]: 3467/5897 cut-off events. [2024-06-21 16:11:00,510 INFO L125 PetriNetUnfolderBase]: For 1697895/1697897 co-relation queries the response was YES. [2024-06-21 16:11:00,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57142 conditions, 5897 events. 3467/5897 cut-off events. For 1697895/1697897 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 40488 event pairs, 528 based on Foata normal form. 2/5897 useless extension candidates. Maximal degree in co-relation 56893. Up to 4732 conditions per place. [2024-06-21 16:11:00,596 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 654 selfloop transitions, 106 changer transitions 0/768 dead transitions. [2024-06-21 16:11:00,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 768 transitions, 15552 flow [2024-06-21 16:11:00,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:11:00,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:11:00,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-21 16:11:00,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-21 16:11:00,597 INFO L175 Difference]: Start difference. First operand has 554 places, 723 transitions, 12950 flow. Second operand 8 states and 212 transitions. [2024-06-21 16:11:00,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 768 transitions, 15552 flow Killed by 15