./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe026_tso.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/safe026_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe026_tso.i ./goblint.2024-06-19_11-23-25.files/protection/safe026_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 19:32:03,352 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:32:03,424 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:32:03,430 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:32:03,431 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:32:03,450 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:32:03,451 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:32:03,451 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:32:03,452 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:32:03,453 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:32:03,453 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:32:03,453 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:32:03,454 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:32:03,455 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:32:03,456 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:32:03,456 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:32:03,457 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:32:03,459 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:32:03,459 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:32:03,459 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:32:03,460 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:32:03,460 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:32:03,460 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:32:03,460 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:32:03,461 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:32:03,461 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:32:03,461 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:32:03,461 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:32:03,461 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:32:03,462 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:32:03,462 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:32:03,463 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:32:03,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:32:03,463 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:32:03,463 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:32:03,464 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:32:03,464 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:32:03,464 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:32:03,464 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:32:03,464 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:32:03,465 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:32:03,465 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:32:03,465 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:32:03,465 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:32:03,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:32:03,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:32:03,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:32:03,699 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:32:03,700 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:32:03,701 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe026_tso.i [2024-06-27 19:32:04,806 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:32:04,980 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:32:04,980 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe026_tso.i [2024-06-27 19:32:04,992 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ebd2f794/1e9e2326f93442f9949f37abd9ec580e/FLAG430c02556 [2024-06-27 19:32:05,002 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ebd2f794/1e9e2326f93442f9949f37abd9ec580e [2024-06-27 19:32:05,005 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:32:05,005 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:32:05,006 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe026_tso.yml/witness.yml [2024-06-27 19:32:05,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:32:05,093 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:32:05,093 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:32:05,094 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:32:05,097 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:32:05,098 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:32:05" (1/2) ... [2024-06-27 19:32:05,099 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b665166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:05, skipping insertion in model container [2024-06-27 19:32:05,099 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:32:05" (1/2) ... [2024-06-27 19:32:05,101 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@15720b8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:05, skipping insertion in model container [2024-06-27 19:32:05,101 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:32:05" (2/2) ... [2024-06-27 19:32:05,102 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b665166 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:05, skipping insertion in model container [2024-06-27 19:32:05,102 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:32:05" (2/2) ... [2024-06-27 19:32:05,102 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:32:05,138 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:32:05,139 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-27 19:32:05,139 INFO L97 edCorrectnessWitness]: Location invariant before [L776-L776] ((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-27 19:32:05,139 INFO L97 edCorrectnessWitness]: Location invariant before [L778-L778] ((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-27 19:32:05,139 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:32:05,139 INFO L106 edCorrectnessWitness]: ghost_update [L774-L774] multithreaded = 1; [2024-06-27 19:32:05,165 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:32:05,436 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:32:05,448 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:32:05,541 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:32:05,579 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:32:05,580 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:05 WrapperNode [2024-06-27 19:32:05,580 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:32:05,581 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:32:05,581 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:32:05,581 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:32:05,586 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:05" (1/1) ... [2024-06-27 19:32:05,618 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:05" (1/1) ... [2024-06-27 19:32:05,646 INFO L138 Inliner]: procedures = 175, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-27 19:32:05,646 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:32:05,648 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:32:05,648 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:32:05,648 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:32:05,656 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:05" (1/1) ... [2024-06-27 19:32:05,656 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:05" (1/1) ... [2024-06-27 19:32:05,658 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:05" (1/1) ... [2024-06-27 19:32:05,668 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 19:32:05,668 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:05" (1/1) ... [2024-06-27 19:32:05,669 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:05" (1/1) ... [2024-06-27 19:32:05,672 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:05" (1/1) ... [2024-06-27 19:32:05,674 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:05" (1/1) ... [2024-06-27 19:32:05,675 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:05" (1/1) ... [2024-06-27 19:32:05,675 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:05" (1/1) ... [2024-06-27 19:32:05,677 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:32:05,678 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:32:05,678 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:32:05,678 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:32:05,679 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:05" (1/1) ... [2024-06-27 19:32:05,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:32:05,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:32:05,701 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 19:32:05,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 19:32:05,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:32:05,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:32:05,757 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:32:05,757 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:32:05,757 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:32:05,757 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:32:05,757 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:32:05,758 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:32:05,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:32:05,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:32:05,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:32:05,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:32:05,763 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 19:32:05,872 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:32:05,874 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:32:06,008 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:32:06,008 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:32:06,088 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:32:06,088 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:32:06,088 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:32:06 BoogieIcfgContainer [2024-06-27 19:32:06,089 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:32:06,090 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:32:06,090 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:32:06,092 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:32:06,093 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:32:05" (1/4) ... [2024-06-27 19:32:06,093 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2242ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:32:06, skipping insertion in model container [2024-06-27 19:32:06,093 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:32:05" (2/4) ... [2024-06-27 19:32:06,094 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2242ba and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:32:06, skipping insertion in model container [2024-06-27 19:32:06,094 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:05" (3/4) ... [2024-06-27 19:32:06,094 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2242ba and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:32:06, skipping insertion in model container [2024-06-27 19:32:06,094 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:32:06" (4/4) ... [2024-06-27 19:32:06,095 INFO L112 eAbstractionObserver]: Analyzing ICFG safe026_tso.i [2024-06-27 19:32:06,108 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:32:06,109 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 19:32:06,109 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:32:06,146 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:32:06,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 39 transitions, 90 flow [2024-06-27 19:32:06,204 INFO L124 PetriNetUnfolderBase]: 0/36 cut-off events. [2024-06-27 19:32:06,205 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:32:06,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 36 events. 0/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 19:32:06,207 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 39 transitions, 90 flow [2024-06-27 19:32:06,209 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 30 transitions, 69 flow [2024-06-27 19:32:06,217 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:32:06,223 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;@6c94e53e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:32:06,224 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 19:32:06,231 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:32:06,231 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:32:06,232 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:32:06,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:06,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:32:06,233 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)] === [2024-06-27 19:32:06,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:06,237 INFO L85 PathProgramCache]: Analyzing trace with hash 215546049, now seen corresponding path program 1 times [2024-06-27 19:32:06,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:06,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632163319] [2024-06-27 19:32:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:06,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:06,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:06,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:06,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632163319] [2024-06-27 19:32:06,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632163319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:06,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:06,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:32:06,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615762452] [2024-06-27 19:32:06,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:06,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:32:06,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:06,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:32:06,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:32:06,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 39 [2024-06-27 19:32:06,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:06,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:06,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 39 [2024-06-27 19:32:06,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:06,763 INFO L124 PetriNetUnfolderBase]: 474/795 cut-off events. [2024-06-27 19:32:06,764 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-06-27 19:32:06,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1604 conditions, 795 events. 474/795 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3932 event pairs, 295 based on Foata normal form. 1/761 useless extension candidates. Maximal degree in co-relation 1592. Up to 744 conditions per place. [2024-06-27 19:32:06,776 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 27 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-06-27 19:32:06,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 157 flow [2024-06-27 19:32:06,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:32:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:32:06,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-27 19:32:06,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7008547008547008 [2024-06-27 19:32:06,789 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 69 flow. Second operand 3 states and 82 transitions. [2024-06-27 19:32:06,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 157 flow [2024-06-27 19:32:06,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 152 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:06,794 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 96 flow [2024-06-27 19:32:06,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2024-06-27 19:32:06,799 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2024-06-27 19:32:06,799 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 96 flow [2024-06-27 19:32:06,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:06,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:06,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:06,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:32:06,800 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)] === [2024-06-27 19:32:06,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:06,803 INFO L85 PathProgramCache]: Analyzing trace with hash 981332192, now seen corresponding path program 1 times [2024-06-27 19:32:06,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:06,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170857636] [2024-06-27 19:32:06,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:06,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:06,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:06,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170857636] [2024-06-27 19:32:06,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170857636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:06,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:06,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:32:06,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152210008] [2024-06-27 19:32:06,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:06,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:32:06,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:06,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:32:06,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:32:06,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-27 19:32:06,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:06,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:06,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-27 19:32:06,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:07,079 INFO L124 PetriNetUnfolderBase]: 598/1010 cut-off events. [2024-06-27 19:32:07,079 INFO L125 PetriNetUnfolderBase]: For 211/249 co-relation queries the response was YES. [2024-06-27 19:32:07,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2314 conditions, 1010 events. 598/1010 cut-off events. For 211/249 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4863 event pairs, 320 based on Foata normal form. 3/992 useless extension candidates. Maximal degree in co-relation 2302. Up to 909 conditions per place. [2024-06-27 19:32:07,086 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 38 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-27 19:32:07,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 242 flow [2024-06-27 19:32:07,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:32:07,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:32:07,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-27 19:32:07,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6730769230769231 [2024-06-27 19:32:07,089 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 96 flow. Second operand 4 states and 105 transitions. [2024-06-27 19:32:07,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 242 flow [2024-06-27 19:32:07,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:32:07,093 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 148 flow [2024-06-27 19:32:07,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2024-06-27 19:32:07,094 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2024-06-27 19:32:07,094 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 148 flow [2024-06-27 19:32:07,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:07,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:07,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:07,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:32:07,097 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:07,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:07,101 INFO L85 PathProgramCache]: Analyzing trace with hash 356527232, now seen corresponding path program 1 times [2024-06-27 19:32:07,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:07,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506580340] [2024-06-27 19:32:07,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:07,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:07,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:07,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506580340] [2024-06-27 19:32:07,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506580340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:07,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:07,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:07,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141759324] [2024-06-27 19:32:07,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:07,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:07,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:07,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:07,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:07,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:07,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:07,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:07,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:07,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:07,414 INFO L124 PetriNetUnfolderBase]: 733/1219 cut-off events. [2024-06-27 19:32:07,415 INFO L125 PetriNetUnfolderBase]: For 656/656 co-relation queries the response was YES. [2024-06-27 19:32:07,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3126 conditions, 1219 events. 733/1219 cut-off events. For 656/656 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5901 event pairs, 234 based on Foata normal form. 5/1222 useless extension candidates. Maximal degree in co-relation 3111. Up to 1040 conditions per place. [2024-06-27 19:32:07,421 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 58 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-06-27 19:32:07,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 79 transitions, 427 flow [2024-06-27 19:32:07,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:07,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-27 19:32:07,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6871794871794872 [2024-06-27 19:32:07,423 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 148 flow. Second operand 5 states and 134 transitions. [2024-06-27 19:32:07,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 79 transitions, 427 flow [2024-06-27 19:32:07,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 79 transitions, 423 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:07,426 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 258 flow [2024-06-27 19:32:07,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2024-06-27 19:32:07,426 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 11 predicate places. [2024-06-27 19:32:07,427 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 258 flow [2024-06-27 19:32:07,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:07,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:07,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:07,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:32:07,427 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)] === [2024-06-27 19:32:07,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:07,428 INFO L85 PathProgramCache]: Analyzing trace with hash -974701441, now seen corresponding path program 1 times [2024-06-27 19:32:07,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:07,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464070914] [2024-06-27 19:32:07,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:07,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:07,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:07,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464070914] [2024-06-27 19:32:07,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464070914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:07,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:07,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:07,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142458485] [2024-06-27 19:32:07,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:07,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:07,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:07,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:07,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:07,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:07,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 258 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:07,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:07,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:07,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:07,736 INFO L124 PetriNetUnfolderBase]: 794/1330 cut-off events. [2024-06-27 19:32:07,737 INFO L125 PetriNetUnfolderBase]: For 1626/1626 co-relation queries the response was YES. [2024-06-27 19:32:07,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4063 conditions, 1330 events. 794/1330 cut-off events. For 1626/1626 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6673 event pairs, 146 based on Foata normal form. 22/1350 useless extension candidates. Maximal degree in co-relation 4043. Up to 1005 conditions per place. [2024-06-27 19:32:07,747 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 65 selfloop transitions, 16 changer transitions 0/88 dead transitions. [2024-06-27 19:32:07,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 88 transitions, 544 flow [2024-06-27 19:32:07,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:07,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 19:32:07,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6709401709401709 [2024-06-27 19:32:07,749 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 258 flow. Second operand 6 states and 157 transitions. [2024-06-27 19:32:07,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 88 transitions, 544 flow [2024-06-27 19:32:07,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 88 transitions, 540 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:07,753 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 302 flow [2024-06-27 19:32:07,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2024-06-27 19:32:07,754 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 16 predicate places. [2024-06-27 19:32:07,754 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 302 flow [2024-06-27 19:32:07,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:07,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:07,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:07,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:32:07,755 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)] === [2024-06-27 19:32:07,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:07,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1016137361, now seen corresponding path program 1 times [2024-06-27 19:32:07,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:07,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416220602] [2024-06-27 19:32:07,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:07,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:07,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:07,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416220602] [2024-06-27 19:32:07,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416220602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:07,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:07,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:32:07,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263534736] [2024-06-27 19:32:07,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:07,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:32:07,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:07,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:32:07,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:32:07,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-27 19:32:07,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 302 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:07,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:07,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-27 19:32:07,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:07,950 INFO L124 PetriNetUnfolderBase]: 692/1222 cut-off events. [2024-06-27 19:32:07,950 INFO L125 PetriNetUnfolderBase]: For 1998/2034 co-relation queries the response was YES. [2024-06-27 19:32:07,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4001 conditions, 1222 events. 692/1222 cut-off events. For 1998/2034 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6351 event pairs, 216 based on Foata normal form. 2/1205 useless extension candidates. Maximal degree in co-relation 3978. Up to 1076 conditions per place. [2024-06-27 19:32:07,959 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 49 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2024-06-27 19:32:07,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 66 transitions, 456 flow [2024-06-27 19:32:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:32:07,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:32:07,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-27 19:32:07,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-27 19:32:07,960 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 302 flow. Second operand 4 states and 100 transitions. [2024-06-27 19:32:07,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 66 transitions, 456 flow [2024-06-27 19:32:07,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 66 transitions, 420 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:07,964 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 308 flow [2024-06-27 19:32:07,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=308, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-27 19:32:07,965 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 17 predicate places. [2024-06-27 19:32:07,965 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 308 flow [2024-06-27 19:32:07,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:07,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:07,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:07,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:32:07,966 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)] === [2024-06-27 19:32:07,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:07,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1563176170, now seen corresponding path program 1 times [2024-06-27 19:32:07,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:07,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489625855] [2024-06-27 19:32:07,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:07,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:08,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:08,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489625855] [2024-06-27 19:32:08,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489625855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:08,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:08,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:08,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230750313] [2024-06-27 19:32:08,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:08,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:08,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:08,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:08,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:08,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:08,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:08,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:08,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:08,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:08,203 INFO L124 PetriNetUnfolderBase]: 795/1323 cut-off events. [2024-06-27 19:32:08,204 INFO L125 PetriNetUnfolderBase]: For 2606/2606 co-relation queries the response was YES. [2024-06-27 19:32:08,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4429 conditions, 1323 events. 795/1323 cut-off events. For 2606/2606 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6594 event pairs, 254 based on Foata normal form. 4/1325 useless extension candidates. Maximal degree in co-relation 4404. Up to 1150 conditions per place. [2024-06-27 19:32:08,214 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 55 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2024-06-27 19:32:08,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 79 transitions, 545 flow [2024-06-27 19:32:08,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:08,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-27 19:32:08,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6512820512820513 [2024-06-27 19:32:08,216 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 308 flow. Second operand 5 states and 127 transitions. [2024-06-27 19:32:08,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 79 transitions, 545 flow [2024-06-27 19:32:08,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 531 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:08,221 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 375 flow [2024-06-27 19:32:08,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=375, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-06-27 19:32:08,223 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 21 predicate places. [2024-06-27 19:32:08,224 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 375 flow [2024-06-27 19:32:08,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:08,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:08,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:08,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:32:08,225 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)] === [2024-06-27 19:32:08,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:08,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1550084008, now seen corresponding path program 2 times [2024-06-27 19:32:08,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:08,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399091267] [2024-06-27 19:32:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:08,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:08,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:08,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399091267] [2024-06-27 19:32:08,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399091267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:08,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:08,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:08,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147382957] [2024-06-27 19:32:08,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:08,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:08,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:08,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:08,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:08,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:08,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 375 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:08,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:08,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:08,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:08,484 INFO L124 PetriNetUnfolderBase]: 775/1280 cut-off events. [2024-06-27 19:32:08,485 INFO L125 PetriNetUnfolderBase]: For 3358/3362 co-relation queries the response was YES. [2024-06-27 19:32:08,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4521 conditions, 1280 events. 775/1280 cut-off events. For 3358/3362 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6236 event pairs, 264 based on Foata normal form. 3/1280 useless extension candidates. Maximal degree in co-relation 4494. Up to 1114 conditions per place. [2024-06-27 19:32:08,493 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 49 selfloop transitions, 19 changer transitions 0/75 dead transitions. [2024-06-27 19:32:08,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 75 transitions, 557 flow [2024-06-27 19:32:08,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:08,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:08,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-27 19:32:08,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-06-27 19:32:08,495 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 375 flow. Second operand 5 states and 123 transitions. [2024-06-27 19:32:08,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 75 transitions, 557 flow [2024-06-27 19:32:08,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 75 transitions, 536 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:08,499 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 408 flow [2024-06-27 19:32:08,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=408, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-06-27 19:32:08,500 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 24 predicate places. [2024-06-27 19:32:08,500 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 408 flow [2024-06-27 19:32:08,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:08,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:08,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:08,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:32:08,501 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)] === [2024-06-27 19:32:08,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:08,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1566480342, now seen corresponding path program 1 times [2024-06-27 19:32:08,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:08,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545412584] [2024-06-27 19:32:08,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:08,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:08,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:08,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545412584] [2024-06-27 19:32:08,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545412584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:08,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:08,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:08,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704030430] [2024-06-27 19:32:08,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:08,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:08,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:08,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:08,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:08,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-27 19:32:08,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 408 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) [2024-06-27 19:32:08,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:08,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-27 19:32:08,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:08,757 INFO L124 PetriNetUnfolderBase]: 657/1172 cut-off events. [2024-06-27 19:32:08,757 INFO L125 PetriNetUnfolderBase]: For 3344/3360 co-relation queries the response was YES. [2024-06-27 19:32:08,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4127 conditions, 1172 events. 657/1172 cut-off events. For 3344/3360 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5990 event pairs, 184 based on Foata normal form. 4/1167 useless extension candidates. Maximal degree in co-relation 4099. Up to 992 conditions per place. [2024-06-27 19:32:08,765 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 59 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2024-06-27 19:32:08,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 78 transitions, 596 flow [2024-06-27 19:32:08,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:08,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:08,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-27 19:32:08,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6256410256410256 [2024-06-27 19:32:08,769 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 408 flow. Second operand 5 states and 122 transitions. [2024-06-27 19:32:08,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 78 transitions, 596 flow [2024-06-27 19:32:08,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 78 transitions, 569 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:08,776 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 422 flow [2024-06-27 19:32:08,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=422, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2024-06-27 19:32:08,778 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 27 predicate places. [2024-06-27 19:32:08,779 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 422 flow [2024-06-27 19:32:08,779 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) [2024-06-27 19:32:08,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:08,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:08,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:32:08,779 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)] === [2024-06-27 19:32:08,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:08,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1939018475, now seen corresponding path program 1 times [2024-06-27 19:32:08,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:08,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199099560] [2024-06-27 19:32:08,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:08,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:08,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:08,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199099560] [2024-06-27 19:32:08,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199099560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:08,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:08,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:08,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730092584] [2024-06-27 19:32:08,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:08,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:08,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:08,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:08,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:08,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:08,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 422 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:08,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:08,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:08,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:09,044 INFO L124 PetriNetUnfolderBase]: 842/1405 cut-off events. [2024-06-27 19:32:09,044 INFO L125 PetriNetUnfolderBase]: For 5543/5543 co-relation queries the response was YES. [2024-06-27 19:32:09,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5120 conditions, 1405 events. 842/1405 cut-off events. For 5543/5543 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7080 event pairs, 248 based on Foata normal form. 20/1423 useless extension candidates. Maximal degree in co-relation 5090. Up to 1117 conditions per place. [2024-06-27 19:32:09,052 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 63 selfloop transitions, 20 changer transitions 0/90 dead transitions. [2024-06-27 19:32:09,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 90 transitions, 670 flow [2024-06-27 19:32:09,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:09,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:09,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 19:32:09,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6367521367521367 [2024-06-27 19:32:09,053 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 422 flow. Second operand 6 states and 149 transitions. [2024-06-27 19:32:09,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 90 transitions, 670 flow [2024-06-27 19:32:09,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 90 transitions, 647 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:09,062 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 465 flow [2024-06-27 19:32:09,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=465, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2024-06-27 19:32:09,063 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 30 predicate places. [2024-06-27 19:32:09,064 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 465 flow [2024-06-27 19:32:09,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:09,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:09,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:09,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:32:09,064 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)] === [2024-06-27 19:32:09,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:09,065 INFO L85 PathProgramCache]: Analyzing trace with hash -910121547, now seen corresponding path program 2 times [2024-06-27 19:32:09,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:09,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730292960] [2024-06-27 19:32:09,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:09,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:09,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:09,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:09,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730292960] [2024-06-27 19:32:09,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730292960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:09,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:09,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:09,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025777548] [2024-06-27 19:32:09,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:09,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:09,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:09,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:09,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:09,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:09,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 465 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:09,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:09,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:09,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:09,323 INFO L124 PetriNetUnfolderBase]: 859/1436 cut-off events. [2024-06-27 19:32:09,323 INFO L125 PetriNetUnfolderBase]: For 6369/6373 co-relation queries the response was YES. [2024-06-27 19:32:09,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5498 conditions, 1436 events. 859/1436 cut-off events. For 6369/6373 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7227 event pairs, 276 based on Foata normal form. 5/1438 useless extension candidates. Maximal degree in co-relation 5467. Up to 1236 conditions per place. [2024-06-27 19:32:09,333 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 58 selfloop transitions, 21 changer transitions 0/86 dead transitions. [2024-06-27 19:32:09,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 86 transitions, 691 flow [2024-06-27 19:32:09,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:09,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:09,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 19:32:09,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-27 19:32:09,334 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 465 flow. Second operand 6 states and 144 transitions. [2024-06-27 19:32:09,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 86 transitions, 691 flow [2024-06-27 19:32:09,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 86 transitions, 647 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:09,343 INFO L231 Difference]: Finished difference. Result has 72 places, 66 transitions, 492 flow [2024-06-27 19:32:09,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=492, PETRI_PLACES=72, PETRI_TRANSITIONS=66} [2024-06-27 19:32:09,343 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 32 predicate places. [2024-06-27 19:32:09,344 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 66 transitions, 492 flow [2024-06-27 19:32:09,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:09,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:09,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:09,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:32:09,344 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)] === [2024-06-27 19:32:09,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:09,345 INFO L85 PathProgramCache]: Analyzing trace with hash 490627595, now seen corresponding path program 3 times [2024-06-27 19:32:09,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:09,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128524274] [2024-06-27 19:32:09,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:09,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:09,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:09,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128524274] [2024-06-27 19:32:09,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128524274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:09,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:09,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:09,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414539843] [2024-06-27 19:32:09,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:09,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:09,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:09,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:09,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:09,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:09,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 66 transitions, 492 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:09,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:09,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:09,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:09,623 INFO L124 PetriNetUnfolderBase]: 851/1424 cut-off events. [2024-06-27 19:32:09,623 INFO L125 PetriNetUnfolderBase]: For 7204/7208 co-relation queries the response was YES. [2024-06-27 19:32:09,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5550 conditions, 1424 events. 851/1424 cut-off events. For 7204/7208 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7174 event pairs, 226 based on Foata normal form. 5/1426 useless extension candidates. Maximal degree in co-relation 5518. Up to 1073 conditions per place. [2024-06-27 19:32:09,636 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 59 selfloop transitions, 26 changer transitions 0/92 dead transitions. [2024-06-27 19:32:09,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 92 transitions, 746 flow [2024-06-27 19:32:09,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:09,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:09,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 19:32:09,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2024-06-27 19:32:09,638 INFO L175 Difference]: Start difference. First operand has 72 places, 66 transitions, 492 flow. Second operand 6 states and 148 transitions. [2024-06-27 19:32:09,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 92 transitions, 746 flow [2024-06-27 19:32:09,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 92 transitions, 693 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:09,646 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 524 flow [2024-06-27 19:32:09,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=524, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2024-06-27 19:32:09,646 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 34 predicate places. [2024-06-27 19:32:09,646 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 524 flow [2024-06-27 19:32:09,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:09,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:09,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:09,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:32:09,647 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)] === [2024-06-27 19:32:09,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:09,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1032749785, now seen corresponding path program 1 times [2024-06-27 19:32:09,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:09,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433445835] [2024-06-27 19:32:09,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:09,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:09,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:09,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433445835] [2024-06-27 19:32:09,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433445835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:09,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:09,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:09,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829371789] [2024-06-27 19:32:09,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:09,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:09,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:09,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:09,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:09,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:09,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 524 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:09,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:09,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:09,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:09,949 INFO L124 PetriNetUnfolderBase]: 928/1556 cut-off events. [2024-06-27 19:32:09,949 INFO L125 PetriNetUnfolderBase]: For 9838/9838 co-relation queries the response was YES. [2024-06-27 19:32:09,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6268 conditions, 1556 events. 928/1556 cut-off events. For 9838/9838 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8116 event pairs, 216 based on Foata normal form. 12/1566 useless extension candidates. Maximal degree in co-relation 6235. Up to 953 conditions per place. [2024-06-27 19:32:09,959 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 73 selfloop transitions, 21 changer transitions 0/101 dead transitions. [2024-06-27 19:32:09,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 101 transitions, 864 flow [2024-06-27 19:32:09,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:09,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:09,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 19:32:09,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6495726495726496 [2024-06-27 19:32:09,960 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 524 flow. Second operand 6 states and 152 transitions. [2024-06-27 19:32:09,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 101 transitions, 864 flow [2024-06-27 19:32:09,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 101 transitions, 797 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:09,971 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 535 flow [2024-06-27 19:32:09,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=70, 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=6, PETRI_FLOW=535, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2024-06-27 19:32:09,972 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 36 predicate places. [2024-06-27 19:32:09,972 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 535 flow [2024-06-27 19:32:09,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:09,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:09,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:09,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:32:09,973 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)] === [2024-06-27 19:32:09,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:09,973 INFO L85 PathProgramCache]: Analyzing trace with hash -631287087, now seen corresponding path program 1 times [2024-06-27 19:32:09,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:09,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196204604] [2024-06-27 19:32:09,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:09,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:10,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:10,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:10,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196204604] [2024-06-27 19:32:10,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196204604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:10,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:10,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:10,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747554960] [2024-06-27 19:32:10,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:10,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:10,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:10,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:10,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:10,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:10,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 535 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:10,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:10,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:10,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:10,267 INFO L124 PetriNetUnfolderBase]: 908/1532 cut-off events. [2024-06-27 19:32:10,267 INFO L125 PetriNetUnfolderBase]: For 10328/10328 co-relation queries the response was YES. [2024-06-27 19:32:10,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6104 conditions, 1532 events. 908/1532 cut-off events. For 10328/10328 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7992 event pairs, 182 based on Foata normal form. 12/1542 useless extension candidates. Maximal degree in co-relation 6070. Up to 947 conditions per place. [2024-06-27 19:32:10,276 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 70 selfloop transitions, 22 changer transitions 0/99 dead transitions. [2024-06-27 19:32:10,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 99 transitions, 795 flow [2024-06-27 19:32:10,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:10,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:10,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:32:10,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-27 19:32:10,279 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 535 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:32:10,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 99 transitions, 795 flow [2024-06-27 19:32:10,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 99 transitions, 764 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:10,293 INFO L231 Difference]: Finished difference. Result has 80 places, 70 transitions, 555 flow [2024-06-27 19:32:10,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=555, PETRI_PLACES=80, PETRI_TRANSITIONS=70} [2024-06-27 19:32:10,294 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 40 predicate places. [2024-06-27 19:32:10,294 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 70 transitions, 555 flow [2024-06-27 19:32:10,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:10,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:10,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:10,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:32:10,295 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)] === [2024-06-27 19:32:10,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:10,296 INFO L85 PathProgramCache]: Analyzing trace with hash -546007499, now seen corresponding path program 2 times [2024-06-27 19:32:10,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:10,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106747318] [2024-06-27 19:32:10,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:10,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:10,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:10,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106747318] [2024-06-27 19:32:10,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106747318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:10,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:10,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:10,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210691069] [2024-06-27 19:32:10,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:10,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:10,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:10,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:10,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:10,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:10,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 70 transitions, 555 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:10,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:10,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:10,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:10,558 INFO L124 PetriNetUnfolderBase]: 888/1496 cut-off events. [2024-06-27 19:32:10,559 INFO L125 PetriNetUnfolderBase]: For 10723/10727 co-relation queries the response was YES. [2024-06-27 19:32:10,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6000 conditions, 1496 events. 888/1496 cut-off events. For 10723/10727 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7714 event pairs, 141 based on Foata normal form. 13/1505 useless extension candidates. Maximal degree in co-relation 5964. Up to 805 conditions per place. [2024-06-27 19:32:10,565 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 63 selfloop transitions, 23 changer transitions 0/93 dead transitions. [2024-06-27 19:32:10,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 93 transitions, 761 flow [2024-06-27 19:32:10,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:10,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:10,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 19:32:10,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 19:32:10,567 INFO L175 Difference]: Start difference. First operand has 80 places, 70 transitions, 555 flow. Second operand 6 states and 143 transitions. [2024-06-27 19:32:10,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 93 transitions, 761 flow [2024-06-27 19:32:10,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 93 transitions, 704 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:10,578 INFO L231 Difference]: Finished difference. Result has 80 places, 69 transitions, 520 flow [2024-06-27 19:32:10,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=520, PETRI_PLACES=80, PETRI_TRANSITIONS=69} [2024-06-27 19:32:10,579 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 40 predicate places. [2024-06-27 19:32:10,579 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 520 flow [2024-06-27 19:32:10,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:10,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:10,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:10,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:32:10,580 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:10,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:10,580 INFO L85 PathProgramCache]: Analyzing trace with hash -475218866, now seen corresponding path program 1 times [2024-06-27 19:32:10,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:10,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625607004] [2024-06-27 19:32:10,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:10,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:10,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:10,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:10,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625607004] [2024-06-27 19:32:10,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625607004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:10,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:10,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:10,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911739285] [2024-06-27 19:32:10,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:10,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:10,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:10,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:10,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:10,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-27 19:32:10,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 69 transitions, 520 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:10,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:10,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-27 19:32:10,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:10,799 INFO L124 PetriNetUnfolderBase]: 806/1432 cut-off events. [2024-06-27 19:32:10,799 INFO L125 PetriNetUnfolderBase]: For 8304/8338 co-relation queries the response was YES. [2024-06-27 19:32:10,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5548 conditions, 1432 events. 806/1432 cut-off events. For 8304/8338 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7725 event pairs, 217 based on Foata normal form. 1/1412 useless extension candidates. Maximal degree in co-relation 5511. Up to 1250 conditions per place. [2024-06-27 19:32:10,807 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 61 selfloop transitions, 17 changer transitions 0/88 dead transitions. [2024-06-27 19:32:10,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 88 transitions, 768 flow [2024-06-27 19:32:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:10,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:10,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-27 19:32:10,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-27 19:32:10,808 INFO L175 Difference]: Start difference. First operand has 80 places, 69 transitions, 520 flow. Second operand 5 states and 120 transitions. [2024-06-27 19:32:10,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 88 transitions, 768 flow [2024-06-27 19:32:10,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 88 transitions, 699 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:10,820 INFO L231 Difference]: Finished difference. Result has 80 places, 75 transitions, 529 flow [2024-06-27 19:32:10,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=529, PETRI_PLACES=80, PETRI_TRANSITIONS=75} [2024-06-27 19:32:10,822 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 40 predicate places. [2024-06-27 19:32:10,822 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 75 transitions, 529 flow [2024-06-27 19:32:10,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:10,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:10,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:10,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:32:10,823 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:10,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:10,823 INFO L85 PathProgramCache]: Analyzing trace with hash 476611056, now seen corresponding path program 2 times [2024-06-27 19:32:10,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:10,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537162086] [2024-06-27 19:32:10,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:10,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:10,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:10,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537162086] [2024-06-27 19:32:10,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537162086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:10,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:10,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:10,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468708781] [2024-06-27 19:32:10,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:10,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:10,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:10,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:10,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:10,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-27 19:32:10,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 75 transitions, 529 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:10,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:10,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-27 19:32:10,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:11,080 INFO L124 PetriNetUnfolderBase]: 798/1420 cut-off events. [2024-06-27 19:32:11,080 INFO L125 PetriNetUnfolderBase]: For 8828/8862 co-relation queries the response was YES. [2024-06-27 19:32:11,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5451 conditions, 1420 events. 798/1420 cut-off events. For 8828/8862 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7640 event pairs, 217 based on Foata normal form. 2/1401 useless extension candidates. Maximal degree in co-relation 5414. Up to 1243 conditions per place. [2024-06-27 19:32:11,088 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 62 selfloop transitions, 14 changer transitions 0/86 dead transitions. [2024-06-27 19:32:11,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 709 flow [2024-06-27 19:32:11,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:32:11,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:32:11,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-27 19:32:11,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-27 19:32:11,089 INFO L175 Difference]: Start difference. First operand has 80 places, 75 transitions, 529 flow. Second operand 4 states and 100 transitions. [2024-06-27 19:32:11,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 709 flow [2024-06-27 19:32:11,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 86 transitions, 683 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-27 19:32:11,103 INFO L231 Difference]: Finished difference. Result has 83 places, 75 transitions, 542 flow [2024-06-27 19:32:11,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=542, PETRI_PLACES=83, PETRI_TRANSITIONS=75} [2024-06-27 19:32:11,104 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 43 predicate places. [2024-06-27 19:32:11,104 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 75 transitions, 542 flow [2024-06-27 19:32:11,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:11,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:11,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:11,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:32:11,105 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:11,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:11,105 INFO L85 PathProgramCache]: Analyzing trace with hash 754577910, now seen corresponding path program 1 times [2024-06-27 19:32:11,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:11,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741187598] [2024-06-27 19:32:11,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:11,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:11,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:11,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741187598] [2024-06-27 19:32:11,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741187598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:11,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:11,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:11,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84514321] [2024-06-27 19:32:11,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:11,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:11,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:11,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:11,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:11,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:11,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 75 transitions, 542 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:11,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:11,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:11,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:11,372 INFO L124 PetriNetUnfolderBase]: 910/1553 cut-off events. [2024-06-27 19:32:11,372 INFO L125 PetriNetUnfolderBase]: For 12481/12481 co-relation queries the response was YES. [2024-06-27 19:32:11,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6237 conditions, 1553 events. 910/1553 cut-off events. For 12481/12481 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8186 event pairs, 261 based on Foata normal form. 2/1553 useless extension candidates. Maximal degree in co-relation 6198. Up to 1294 conditions per place. [2024-06-27 19:32:11,380 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 74 selfloop transitions, 35 changer transitions 0/116 dead transitions. [2024-06-27 19:32:11,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 116 transitions, 990 flow [2024-06-27 19:32:11,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:11,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:32:11,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-27 19:32:11,381 INFO L175 Difference]: Start difference. First operand has 83 places, 75 transitions, 542 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:32:11,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 116 transitions, 990 flow [2024-06-27 19:32:11,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 116 transitions, 948 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:11,396 INFO L231 Difference]: Finished difference. Result has 87 places, 92 transitions, 736 flow [2024-06-27 19:32:11,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=736, PETRI_PLACES=87, PETRI_TRANSITIONS=92} [2024-06-27 19:32:11,396 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 47 predicate places. [2024-06-27 19:32:11,397 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 92 transitions, 736 flow [2024-06-27 19:32:11,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:11,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:11,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:11,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:32:11,397 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:11,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:11,398 INFO L85 PathProgramCache]: Analyzing trace with hash 433942997, now seen corresponding path program 1 times [2024-06-27 19:32:11,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:11,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635818598] [2024-06-27 19:32:11,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:11,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:11,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:11,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635818598] [2024-06-27 19:32:11,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635818598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:11,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:11,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:11,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057260439] [2024-06-27 19:32:11,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:11,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:11,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:11,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:11,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:11,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:11,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 92 transitions, 736 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:11,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:11,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:11,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:11,635 INFO L124 PetriNetUnfolderBase]: 920/1572 cut-off events. [2024-06-27 19:32:11,635 INFO L125 PetriNetUnfolderBase]: For 13223/13223 co-relation queries the response was YES. [2024-06-27 19:32:11,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6822 conditions, 1572 events. 920/1572 cut-off events. For 13223/13223 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8250 event pairs, 258 based on Foata normal form. 1/1572 useless extension candidates. Maximal degree in co-relation 6781. Up to 1402 conditions per place. [2024-06-27 19:32:11,644 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 89 selfloop transitions, 22 changer transitions 0/118 dead transitions. [2024-06-27 19:32:11,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 118 transitions, 1121 flow [2024-06-27 19:32:11,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:11,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:11,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 19:32:11,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.594017094017094 [2024-06-27 19:32:11,646 INFO L175 Difference]: Start difference. First operand has 87 places, 92 transitions, 736 flow. Second operand 6 states and 139 transitions. [2024-06-27 19:32:11,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 118 transitions, 1121 flow [2024-06-27 19:32:11,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 118 transitions, 1089 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:11,663 INFO L231 Difference]: Finished difference. Result has 94 places, 101 transitions, 855 flow [2024-06-27 19:32:11,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=855, PETRI_PLACES=94, PETRI_TRANSITIONS=101} [2024-06-27 19:32:11,664 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 54 predicate places. [2024-06-27 19:32:11,664 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 101 transitions, 855 flow [2024-06-27 19:32:11,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:11,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:11,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:11,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:32:11,664 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:11,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:11,665 INFO L85 PathProgramCache]: Analyzing trace with hash 433942656, now seen corresponding path program 2 times [2024-06-27 19:32:11,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:11,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272133550] [2024-06-27 19:32:11,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:11,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:11,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:11,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272133550] [2024-06-27 19:32:11,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272133550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:11,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:11,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:11,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589448511] [2024-06-27 19:32:11,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:11,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:11,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:11,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:11,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:11,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:11,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 101 transitions, 855 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:11,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:11,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:11,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:11,961 INFO L124 PetriNetUnfolderBase]: 948/1618 cut-off events. [2024-06-27 19:32:11,961 INFO L125 PetriNetUnfolderBase]: For 15175/15175 co-relation queries the response was YES. [2024-06-27 19:32:11,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7207 conditions, 1618 events. 948/1618 cut-off events. For 15175/15175 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8552 event pairs, 257 based on Foata normal form. 2/1619 useless extension candidates. Maximal degree in co-relation 7162. Up to 1438 conditions per place. [2024-06-27 19:32:11,972 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 97 selfloop transitions, 23 changer transitions 0/127 dead transitions. [2024-06-27 19:32:11,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 127 transitions, 1238 flow [2024-06-27 19:32:11,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:11,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-27 19:32:11,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575091575091575 [2024-06-27 19:32:11,974 INFO L175 Difference]: Start difference. First operand has 94 places, 101 transitions, 855 flow. Second operand 7 states and 157 transitions. [2024-06-27 19:32:11,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 127 transitions, 1238 flow [2024-06-27 19:32:11,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 127 transitions, 1200 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-27 19:32:11,992 INFO L231 Difference]: Finished difference. Result has 101 places, 109 transitions, 958 flow [2024-06-27 19:32:11,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=958, PETRI_PLACES=101, PETRI_TRANSITIONS=109} [2024-06-27 19:32:11,993 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 61 predicate places. [2024-06-27 19:32:11,993 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 109 transitions, 958 flow [2024-06-27 19:32:11,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:11,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:11,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:11,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:32:11,994 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:11,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:11,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1890243729, now seen corresponding path program 2 times [2024-06-27 19:32:11,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:11,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690511134] [2024-06-27 19:32:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:11,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:12,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:12,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690511134] [2024-06-27 19:32:12,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690511134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:12,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:12,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:12,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77843582] [2024-06-27 19:32:12,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:12,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:12,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:12,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:12,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:12,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:12,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 109 transitions, 958 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:12,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:12,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:12,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:12,256 INFO L124 PetriNetUnfolderBase]: 953/1627 cut-off events. [2024-06-27 19:32:12,257 INFO L125 PetriNetUnfolderBase]: For 16619/16619 co-relation queries the response was YES. [2024-06-27 19:32:12,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7449 conditions, 1627 events. 953/1627 cut-off events. For 16619/16619 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8617 event pairs, 258 based on Foata normal form. 1/1627 useless extension candidates. Maximal degree in co-relation 7401. Up to 1454 conditions per place. [2024-06-27 19:32:12,266 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 100 selfloop transitions, 19 changer transitions 0/126 dead transitions. [2024-06-27 19:32:12,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 126 transitions, 1266 flow [2024-06-27 19:32:12,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:32:12,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:32:12,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-27 19:32:12,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2024-06-27 19:32:12,268 INFO L175 Difference]: Start difference. First operand has 101 places, 109 transitions, 958 flow. Second operand 4 states and 102 transitions. [2024-06-27 19:32:12,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 126 transitions, 1266 flow [2024-06-27 19:32:12,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 126 transitions, 1204 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:12,289 INFO L231 Difference]: Finished difference. Result has 100 places, 112 transitions, 990 flow [2024-06-27 19:32:12,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=990, PETRI_PLACES=100, PETRI_TRANSITIONS=112} [2024-06-27 19:32:12,289 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 60 predicate places. [2024-06-27 19:32:12,289 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 112 transitions, 990 flow [2024-06-27 19:32:12,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:12,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:12,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:12,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:32:12,290 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:12,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:12,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1908969581, now seen corresponding path program 3 times [2024-06-27 19:32:12,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:12,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322281472] [2024-06-27 19:32:12,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:12,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:12,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:12,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322281472] [2024-06-27 19:32:12,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322281472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:12,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:12,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:12,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112177124] [2024-06-27 19:32:12,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:12,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:12,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:12,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:12,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:12,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:12,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 112 transitions, 990 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:12,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:12,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:12,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:12,521 INFO L124 PetriNetUnfolderBase]: 950/1623 cut-off events. [2024-06-27 19:32:12,521 INFO L125 PetriNetUnfolderBase]: For 17936/17936 co-relation queries the response was YES. [2024-06-27 19:32:12,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7465 conditions, 1623 events. 950/1623 cut-off events. For 17936/17936 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8568 event pairs, 258 based on Foata normal form. 1/1623 useless extension candidates. Maximal degree in co-relation 7417. Up to 1444 conditions per place. [2024-06-27 19:32:12,530 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 95 selfloop transitions, 25 changer transitions 0/127 dead transitions. [2024-06-27 19:32:12,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 127 transitions, 1268 flow [2024-06-27 19:32:12,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:12,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:12,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-27 19:32:12,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-27 19:32:12,532 INFO L175 Difference]: Start difference. First operand has 100 places, 112 transitions, 990 flow. Second operand 5 states and 120 transitions. [2024-06-27 19:32:12,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 127 transitions, 1268 flow [2024-06-27 19:32:12,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 127 transitions, 1216 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:12,550 INFO L231 Difference]: Finished difference. Result has 103 places, 112 transitions, 998 flow [2024-06-27 19:32:12,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=998, PETRI_PLACES=103, PETRI_TRANSITIONS=112} [2024-06-27 19:32:12,550 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 63 predicate places. [2024-06-27 19:32:12,550 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 112 transitions, 998 flow [2024-06-27 19:32:12,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:12,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:12,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:12,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:32:12,551 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:12,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:12,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1908969240, now seen corresponding path program 3 times [2024-06-27 19:32:12,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:12,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703656272] [2024-06-27 19:32:12,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:12,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:12,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:12,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703656272] [2024-06-27 19:32:12,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703656272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:12,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:12,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:12,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721519179] [2024-06-27 19:32:12,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:12,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:12,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:12,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:12,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:12,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:12,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 112 transitions, 998 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:12,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:12,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:12,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:12,826 INFO L124 PetriNetUnfolderBase]: 970/1644 cut-off events. [2024-06-27 19:32:12,827 INFO L125 PetriNetUnfolderBase]: For 19578/19578 co-relation queries the response was YES. [2024-06-27 19:32:12,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7717 conditions, 1644 events. 970/1644 cut-off events. For 19578/19578 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8672 event pairs, 257 based on Foata normal form. 2/1645 useless extension candidates. Maximal degree in co-relation 7668. Up to 1384 conditions per place. [2024-06-27 19:32:12,838 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 96 selfloop transitions, 47 changer transitions 0/150 dead transitions. [2024-06-27 19:32:12,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 150 transitions, 1473 flow [2024-06-27 19:32:12,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:12,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:12,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:32:12,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63003663003663 [2024-06-27 19:32:12,839 INFO L175 Difference]: Start difference. First operand has 103 places, 112 transitions, 998 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:32:12,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 150 transitions, 1473 flow [2024-06-27 19:32:12,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 150 transitions, 1409 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:12,864 INFO L231 Difference]: Finished difference. Result has 108 places, 120 transitions, 1171 flow [2024-06-27 19:32:12,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1171, PETRI_PLACES=108, PETRI_TRANSITIONS=120} [2024-06-27 19:32:12,865 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 68 predicate places. [2024-06-27 19:32:12,865 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 120 transitions, 1171 flow [2024-06-27 19:32:12,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:12,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:12,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:12,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:32:12,866 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)] === [2024-06-27 19:32:12,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:12,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1890257617, now seen corresponding path program 1 times [2024-06-27 19:32:12,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:12,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135868998] [2024-06-27 19:32:12,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:12,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:12,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:12,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135868998] [2024-06-27 19:32:12,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135868998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:12,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:12,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:12,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326868905] [2024-06-27 19:32:12,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:12,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:12,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:12,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:12,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:12,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:12,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 120 transitions, 1171 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:12,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:12,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:12,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:13,129 INFO L124 PetriNetUnfolderBase]: 965/1637 cut-off events. [2024-06-27 19:32:13,130 INFO L125 PetriNetUnfolderBase]: For 19906/19906 co-relation queries the response was YES. [2024-06-27 19:32:13,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7932 conditions, 1637 events. 965/1637 cut-off events. For 19906/19906 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8619 event pairs, 257 based on Foata normal form. 2/1638 useless extension candidates. Maximal degree in co-relation 7881. Up to 1489 conditions per place. [2024-06-27 19:32:13,173 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 114 selfloop transitions, 10 changer transitions 0/131 dead transitions. [2024-06-27 19:32:13,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 131 transitions, 1463 flow [2024-06-27 19:32:13,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:32:13,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:32:13,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-27 19:32:13,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-06-27 19:32:13,174 INFO L175 Difference]: Start difference. First operand has 108 places, 120 transitions, 1171 flow. Second operand 4 states and 94 transitions. [2024-06-27 19:32:13,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 131 transitions, 1463 flow [2024-06-27 19:32:13,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 131 transitions, 1393 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:13,195 INFO L231 Difference]: Finished difference. Result has 109 places, 122 transitions, 1152 flow [2024-06-27 19:32:13,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1152, PETRI_PLACES=109, PETRI_TRANSITIONS=122} [2024-06-27 19:32:13,196 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 69 predicate places. [2024-06-27 19:32:13,196 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 122 transitions, 1152 flow [2024-06-27 19:32:13,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:13,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:13,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:13,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:32:13,197 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)] === [2024-06-27 19:32:13,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:13,197 INFO L85 PathProgramCache]: Analyzing trace with hash 558990021, now seen corresponding path program 1 times [2024-06-27 19:32:13,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:13,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333038429] [2024-06-27 19:32:13,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:13,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:13,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:13,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333038429] [2024-06-27 19:32:13,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333038429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:13,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:13,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:13,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68436410] [2024-06-27 19:32:13,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:13,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:13,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:13,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:13,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:13,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:13,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 122 transitions, 1152 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:13,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:13,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:13,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:13,504 INFO L124 PetriNetUnfolderBase]: 983/1667 cut-off events. [2024-06-27 19:32:13,505 INFO L125 PetriNetUnfolderBase]: For 20350/20350 co-relation queries the response was YES. [2024-06-27 19:32:13,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8008 conditions, 1667 events. 983/1667 cut-off events. For 20350/20350 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8848 event pairs, 259 based on Foata normal form. 2/1667 useless extension candidates. Maximal degree in co-relation 7956. Up to 1285 conditions per place. [2024-06-27 19:32:13,516 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 84 selfloop transitions, 68 changer transitions 0/159 dead transitions. [2024-06-27 19:32:13,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 159 transitions, 1710 flow [2024-06-27 19:32:13,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:13,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:32:13,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63003663003663 [2024-06-27 19:32:13,520 INFO L175 Difference]: Start difference. First operand has 109 places, 122 transitions, 1152 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:32:13,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 159 transitions, 1710 flow [2024-06-27 19:32:13,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 159 transitions, 1675 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:13,551 INFO L231 Difference]: Finished difference. Result has 115 places, 134 transitions, 1423 flow [2024-06-27 19:32:13,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1423, PETRI_PLACES=115, PETRI_TRANSITIONS=134} [2024-06-27 19:32:13,552 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 75 predicate places. [2024-06-27 19:32:13,552 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 134 transitions, 1423 flow [2024-06-27 19:32:13,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:13,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:13,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:13,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:32:13,553 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:13,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:13,553 INFO L85 PathProgramCache]: Analyzing trace with hash 562563949, now seen corresponding path program 1 times [2024-06-27 19:32:13,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:13,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843856415] [2024-06-27 19:32:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:13,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:13,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:13,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843856415] [2024-06-27 19:32:13,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843856415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:13,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:13,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:13,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430158489] [2024-06-27 19:32:13,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:13,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:13,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:13,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:13,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:13,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:13,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 134 transitions, 1423 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:13,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:13,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:13,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:13,875 INFO L124 PetriNetUnfolderBase]: 1001/1692 cut-off events. [2024-06-27 19:32:13,875 INFO L125 PetriNetUnfolderBase]: For 23893/23893 co-relation queries the response was YES. [2024-06-27 19:32:13,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8863 conditions, 1692 events. 1001/1692 cut-off events. For 23893/23893 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8952 event pairs, 259 based on Foata normal form. 2/1692 useless extension candidates. Maximal degree in co-relation 8809. Up to 1390 conditions per place. [2024-06-27 19:32:13,888 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 98 selfloop transitions, 59 changer transitions 0/164 dead transitions. [2024-06-27 19:32:13,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 164 transitions, 1994 flow [2024-06-27 19:32:13,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:13,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:13,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 19:32:13,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2024-06-27 19:32:13,890 INFO L175 Difference]: Start difference. First operand has 115 places, 134 transitions, 1423 flow. Second operand 6 states and 147 transitions. [2024-06-27 19:32:13,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 164 transitions, 1994 flow [2024-06-27 19:32:13,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 164 transitions, 1928 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:13,927 INFO L231 Difference]: Finished difference. Result has 120 places, 143 transitions, 1629 flow [2024-06-27 19:32:13,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1629, PETRI_PLACES=120, PETRI_TRANSITIONS=143} [2024-06-27 19:32:13,927 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 80 predicate places. [2024-06-27 19:32:13,928 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 143 transitions, 1629 flow [2024-06-27 19:32:13,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:13,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:13,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:13,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:32:13,928 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:13,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:13,929 INFO L85 PathProgramCache]: Analyzing trace with hash 567325549, now seen corresponding path program 2 times [2024-06-27 19:32:13,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:13,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558883945] [2024-06-27 19:32:13,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:13,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:14,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:14,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558883945] [2024-06-27 19:32:14,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558883945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:14,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:14,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:14,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922221428] [2024-06-27 19:32:14,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:14,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:14,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:14,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:14,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:14,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:14,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 143 transitions, 1629 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:14,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:14,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:14,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:14,238 INFO L124 PetriNetUnfolderBase]: 993/1683 cut-off events. [2024-06-27 19:32:14,238 INFO L125 PetriNetUnfolderBase]: For 25076/25076 co-relation queries the response was YES. [2024-06-27 19:32:14,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9012 conditions, 1683 events. 993/1683 cut-off events. For 25076/25076 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 8904 event pairs, 253 based on Foata normal form. 2/1684 useless extension candidates. Maximal degree in co-relation 8955. Up to 1504 conditions per place. [2024-06-27 19:32:14,253 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 130 selfloop transitions, 23 changer transitions 0/160 dead transitions. [2024-06-27 19:32:14,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 160 transitions, 1977 flow [2024-06-27 19:32:14,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:14,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:14,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-27 19:32:14,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 19:32:14,254 INFO L175 Difference]: Start difference. First operand has 120 places, 143 transitions, 1629 flow. Second operand 7 states and 156 transitions. [2024-06-27 19:32:14,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 160 transitions, 1977 flow [2024-06-27 19:32:14,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 160 transitions, 1889 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:14,300 INFO L231 Difference]: Finished difference. Result has 125 places, 143 transitions, 1595 flow [2024-06-27 19:32:14,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1541, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1595, PETRI_PLACES=125, PETRI_TRANSITIONS=143} [2024-06-27 19:32:14,301 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 85 predicate places. [2024-06-27 19:32:14,301 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 143 transitions, 1595 flow [2024-06-27 19:32:14,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:14,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:14,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:14,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:32:14,302 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:14,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:14,302 INFO L85 PathProgramCache]: Analyzing trace with hash 567321891, now seen corresponding path program 2 times [2024-06-27 19:32:14,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:14,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549253633] [2024-06-27 19:32:14,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:14,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:14,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:14,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549253633] [2024-06-27 19:32:14,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549253633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:14,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:14,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:14,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865233865] [2024-06-27 19:32:14,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:14,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:14,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:14,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:14,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:14,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:14,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 143 transitions, 1595 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:14,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:14,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:14,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:14,615 INFO L124 PetriNetUnfolderBase]: 1035/1754 cut-off events. [2024-06-27 19:32:14,615 INFO L125 PetriNetUnfolderBase]: For 28042/28042 co-relation queries the response was YES. [2024-06-27 19:32:14,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9378 conditions, 1754 events. 1035/1754 cut-off events. For 28042/28042 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9367 event pairs, 254 based on Foata normal form. 2/1755 useless extension candidates. Maximal degree in co-relation 9320. Up to 1520 conditions per place. [2024-06-27 19:32:14,627 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 125 selfloop transitions, 43 changer transitions 0/175 dead transitions. [2024-06-27 19:32:14,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 175 transitions, 2193 flow [2024-06-27 19:32:14,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:14,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:14,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 19:32:14,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 19:32:14,628 INFO L175 Difference]: Start difference. First operand has 125 places, 143 transitions, 1595 flow. Second operand 8 states and 182 transitions. [2024-06-27 19:32:14,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 175 transitions, 2193 flow [2024-06-27 19:32:14,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 175 transitions, 2147 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:14,672 INFO L231 Difference]: Finished difference. Result has 128 places, 155 transitions, 1792 flow [2024-06-27 19:32:14,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1549, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1792, PETRI_PLACES=128, PETRI_TRANSITIONS=155} [2024-06-27 19:32:14,672 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 88 predicate places. [2024-06-27 19:32:14,672 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 155 transitions, 1792 flow [2024-06-27 19:32:14,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:14,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:14,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:14,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:32:14,673 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)] === [2024-06-27 19:32:14,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:14,674 INFO L85 PathProgramCache]: Analyzing trace with hash 567332121, now seen corresponding path program 3 times [2024-06-27 19:32:14,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:14,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247338964] [2024-06-27 19:32:14,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:14,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:14,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:14,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247338964] [2024-06-27 19:32:14,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247338964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:14,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:14,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:14,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117222273] [2024-06-27 19:32:14,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:14,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:14,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:14,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:14,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:14,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:14,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 155 transitions, 1792 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:14,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:14,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:14,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:14,969 INFO L124 PetriNetUnfolderBase]: 1031/1749 cut-off events. [2024-06-27 19:32:14,970 INFO L125 PetriNetUnfolderBase]: For 29655/29655 co-relation queries the response was YES. [2024-06-27 19:32:14,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9523 conditions, 1749 events. 1031/1749 cut-off events. For 29655/29655 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9382 event pairs, 254 based on Foata normal form. 2/1750 useless extension candidates. Maximal degree in co-relation 9463. Up to 1518 conditions per place. [2024-06-27 19:32:14,981 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 126 selfloop transitions, 42 changer transitions 0/175 dead transitions. [2024-06-27 19:32:14,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 175 transitions, 2224 flow [2024-06-27 19:32:14,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:32:14,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:32:14,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-27 19:32:14,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-27 19:32:14,983 INFO L175 Difference]: Start difference. First operand has 128 places, 155 transitions, 1792 flow. Second operand 9 states and 198 transitions. [2024-06-27 19:32:14,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 175 transitions, 2224 flow [2024-06-27 19:32:15,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 175 transitions, 2150 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:15,031 INFO L231 Difference]: Finished difference. Result has 134 places, 155 transitions, 1810 flow [2024-06-27 19:32:15,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1810, PETRI_PLACES=134, PETRI_TRANSITIONS=155} [2024-06-27 19:32:15,031 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 94 predicate places. [2024-06-27 19:32:15,031 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 155 transitions, 1810 flow [2024-06-27 19:32:15,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:15,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:15,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:15,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:32:15,032 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:15,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:15,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1758673773, now seen corresponding path program 3 times [2024-06-27 19:32:15,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:15,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723672975] [2024-06-27 19:32:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:15,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:15,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:15,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723672975] [2024-06-27 19:32:15,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723672975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:15,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:15,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:15,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533583445] [2024-06-27 19:32:15,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:15,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:15,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:15,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:15,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:15,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:15,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 155 transitions, 1810 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:15,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:15,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:15,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:15,314 INFO L124 PetriNetUnfolderBase]: 1036/1751 cut-off events. [2024-06-27 19:32:15,314 INFO L125 PetriNetUnfolderBase]: For 32733/32737 co-relation queries the response was YES. [2024-06-27 19:32:15,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9715 conditions, 1751 events. 1036/1751 cut-off events. For 32733/32737 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9357 event pairs, 279 based on Foata normal form. 2/1750 useless extension candidates. Maximal degree in co-relation 9653. Up to 1439 conditions per place. [2024-06-27 19:32:15,326 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 105 selfloop transitions, 65 changer transitions 0/177 dead transitions. [2024-06-27 19:32:15,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 177 transitions, 2391 flow [2024-06-27 19:32:15,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:15,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:15,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 19:32:15,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6196581196581197 [2024-06-27 19:32:15,328 INFO L175 Difference]: Start difference. First operand has 134 places, 155 transitions, 1810 flow. Second operand 6 states and 145 transitions. [2024-06-27 19:32:15,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 177 transitions, 2391 flow [2024-06-27 19:32:15,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 177 transitions, 2300 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:15,385 INFO L231 Difference]: Finished difference. Result has 133 places, 158 transitions, 1900 flow [2024-06-27 19:32:15,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1900, PETRI_PLACES=133, PETRI_TRANSITIONS=158} [2024-06-27 19:32:15,387 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 93 predicate places. [2024-06-27 19:32:15,387 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 158 transitions, 1900 flow [2024-06-27 19:32:15,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:15,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:15,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:15,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:32:15,388 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)] === [2024-06-27 19:32:15,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:15,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1769149293, now seen corresponding path program 4 times [2024-06-27 19:32:15,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:15,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553825819] [2024-06-27 19:32:15,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:15,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:15,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:15,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:15,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:15,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553825819] [2024-06-27 19:32:15,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553825819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:15,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:15,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:15,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067044443] [2024-06-27 19:32:15,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:15,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:15,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:15,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:15,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:15,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:15,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 158 transitions, 1900 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:15,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:15,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:15,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:15,675 INFO L124 PetriNetUnfolderBase]: 1033/1747 cut-off events. [2024-06-27 19:32:15,676 INFO L125 PetriNetUnfolderBase]: For 34698/34702 co-relation queries the response was YES. [2024-06-27 19:32:15,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9821 conditions, 1747 events. 1033/1747 cut-off events. For 34698/34702 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9355 event pairs, 280 based on Foata normal form. 2/1746 useless extension candidates. Maximal degree in co-relation 9758. Up to 1437 conditions per place. [2024-06-27 19:32:15,689 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 101 selfloop transitions, 65 changer transitions 0/173 dead transitions. [2024-06-27 19:32:15,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 173 transitions, 2372 flow [2024-06-27 19:32:15,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:15,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:15,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-27 19:32:15,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6068376068376068 [2024-06-27 19:32:15,690 INFO L175 Difference]: Start difference. First operand has 133 places, 158 transitions, 1900 flow. Second operand 6 states and 142 transitions. [2024-06-27 19:32:15,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 173 transitions, 2372 flow [2024-06-27 19:32:15,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 173 transitions, 2143 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:15,749 INFO L231 Difference]: Finished difference. Result has 133 places, 158 transitions, 1807 flow [2024-06-27 19:32:15,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1807, PETRI_PLACES=133, PETRI_TRANSITIONS=158} [2024-06-27 19:32:15,750 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 93 predicate places. [2024-06-27 19:32:15,750 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 158 transitions, 1807 flow [2024-06-27 19:32:15,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:15,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:15,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:15,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:32:15,751 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)] === [2024-06-27 19:32:15,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:15,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1538242545, now seen corresponding path program 5 times [2024-06-27 19:32:15,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:15,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589907233] [2024-06-27 19:32:15,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:15,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:15,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:15,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589907233] [2024-06-27 19:32:15,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589907233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:15,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:15,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:15,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402989239] [2024-06-27 19:32:15,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:15,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:15,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:15,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:15,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:15,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:15,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 158 transitions, 1807 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:15,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:15,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:15,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:16,020 INFO L124 PetriNetUnfolderBase]: 1030/1750 cut-off events. [2024-06-27 19:32:16,020 INFO L125 PetriNetUnfolderBase]: For 35022/35028 co-relation queries the response was YES. [2024-06-27 19:32:16,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9693 conditions, 1750 events. 1030/1750 cut-off events. For 35022/35028 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9381 event pairs, 262 based on Foata normal form. 7/1756 useless extension candidates. Maximal degree in co-relation 9631. Up to 1468 conditions per place. [2024-06-27 19:32:16,032 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 126 selfloop transitions, 48 changer transitions 0/181 dead transitions. [2024-06-27 19:32:16,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 181 transitions, 2267 flow [2024-06-27 19:32:16,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:16,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:16,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 19:32:16,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6367521367521367 [2024-06-27 19:32:16,034 INFO L175 Difference]: Start difference. First operand has 133 places, 158 transitions, 1807 flow. Second operand 6 states and 149 transitions. [2024-06-27 19:32:16,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 181 transitions, 2267 flow [2024-06-27 19:32:16,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 181 transitions, 2116 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:16,088 INFO L231 Difference]: Finished difference. Result has 135 places, 158 transitions, 1762 flow [2024-06-27 19:32:16,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1762, PETRI_PLACES=135, PETRI_TRANSITIONS=158} [2024-06-27 19:32:16,089 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 95 predicate places. [2024-06-27 19:32:16,089 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 158 transitions, 1762 flow [2024-06-27 19:32:16,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:16,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:16,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:16,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:32:16,090 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)] === [2024-06-27 19:32:16,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:16,090 INFO L85 PathProgramCache]: Analyzing trace with hash -951490603, now seen corresponding path program 6 times [2024-06-27 19:32:16,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:16,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571194993] [2024-06-27 19:32:16,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:16,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:16,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:16,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:16,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571194993] [2024-06-27 19:32:16,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571194993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:16,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:16,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:16,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270217389] [2024-06-27 19:32:16,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:16,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:16,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:16,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:16,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:16,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:16,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 158 transitions, 1762 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:16,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:16,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:16,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:16,386 INFO L124 PetriNetUnfolderBase]: 1022/1736 cut-off events. [2024-06-27 19:32:16,386 INFO L125 PetriNetUnfolderBase]: For 35958/35958 co-relation queries the response was YES. [2024-06-27 19:32:16,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9568 conditions, 1736 events. 1022/1736 cut-off events. For 35958/35958 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9318 event pairs, 253 based on Foata normal form. 2/1737 useless extension candidates. Maximal degree in co-relation 9506. Up to 1460 conditions per place. [2024-06-27 19:32:16,397 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 132 selfloop transitions, 48 changer transitions 0/187 dead transitions. [2024-06-27 19:32:16,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 187 transitions, 2196 flow [2024-06-27 19:32:16,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:16,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:16,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:32:16,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63003663003663 [2024-06-27 19:32:16,399 INFO L175 Difference]: Start difference. First operand has 135 places, 158 transitions, 1762 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:32:16,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 187 transitions, 2196 flow [2024-06-27 19:32:16,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 187 transitions, 2108 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:16,464 INFO L231 Difference]: Finished difference. Result has 137 places, 158 transitions, 1790 flow [2024-06-27 19:32:16,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1674, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1790, PETRI_PLACES=137, PETRI_TRANSITIONS=158} [2024-06-27 19:32:16,464 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 97 predicate places. [2024-06-27 19:32:16,465 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 158 transitions, 1790 flow [2024-06-27 19:32:16,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:16,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:16,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:16,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:32:16,465 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)] === [2024-06-27 19:32:16,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:16,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1543949893, now seen corresponding path program 4 times [2024-06-27 19:32:16,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:16,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88415751] [2024-06-27 19:32:16,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:16,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:16,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:16,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88415751] [2024-06-27 19:32:16,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88415751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:16,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:16,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:16,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077577046] [2024-06-27 19:32:16,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:16,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:16,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:16,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:16,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:16,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:16,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 158 transitions, 1790 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:16,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:16,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:16,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:16,790 INFO L124 PetriNetUnfolderBase]: 1090/1847 cut-off events. [2024-06-27 19:32:16,790 INFO L125 PetriNetUnfolderBase]: For 39199/39199 co-relation queries the response was YES. [2024-06-27 19:32:16,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10401 conditions, 1847 events. 1090/1847 cut-off events. For 39199/39199 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10020 event pairs, 256 based on Foata normal form. 2/1848 useless extension candidates. Maximal degree in co-relation 10339. Up to 1458 conditions per place. [2024-06-27 19:32:16,802 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 117 selfloop transitions, 83 changer transitions 0/207 dead transitions. [2024-06-27 19:32:16,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 207 transitions, 2602 flow [2024-06-27 19:32:16,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:32:16,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:32:16,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-27 19:32:16,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603988603988604 [2024-06-27 19:32:16,804 INFO L175 Difference]: Start difference. First operand has 137 places, 158 transitions, 1790 flow. Second operand 9 states and 212 transitions. [2024-06-27 19:32:16,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 207 transitions, 2602 flow [2024-06-27 19:32:16,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 207 transitions, 2448 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 19:32:16,876 INFO L231 Difference]: Finished difference. Result has 138 places, 175 transitions, 2051 flow [2024-06-27 19:32:16,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1644, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2051, PETRI_PLACES=138, PETRI_TRANSITIONS=175} [2024-06-27 19:32:16,877 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 98 predicate places. [2024-06-27 19:32:16,877 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 175 transitions, 2051 flow [2024-06-27 19:32:16,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:16,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:16,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:16,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:32:16,877 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)] === [2024-06-27 19:32:16,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:16,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1531985443, now seen corresponding path program 5 times [2024-06-27 19:32:16,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:16,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737998442] [2024-06-27 19:32:16,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:16,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:16,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:16,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737998442] [2024-06-27 19:32:16,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737998442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:16,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:16,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:16,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532248746] [2024-06-27 19:32:16,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:16,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:16,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:16,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:16,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:17,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:17,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 175 transitions, 2051 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:17,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:17,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:17,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:17,242 INFO L124 PetriNetUnfolderBase]: 1086/1843 cut-off events. [2024-06-27 19:32:17,242 INFO L125 PetriNetUnfolderBase]: For 36640/36640 co-relation queries the response was YES. [2024-06-27 19:32:17,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10427 conditions, 1843 events. 1086/1843 cut-off events. For 36640/36640 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9994 event pairs, 255 based on Foata normal form. 2/1844 useless extension candidates. Maximal degree in co-relation 10365. Up to 1536 conditions per place. [2024-06-27 19:32:17,255 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 144 selfloop transitions, 52 changer transitions 0/203 dead transitions. [2024-06-27 19:32:17,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 203 transitions, 2605 flow [2024-06-27 19:32:17,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:17,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:17,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-27 19:32:17,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6623931623931624 [2024-06-27 19:32:17,257 INFO L175 Difference]: Start difference. First operand has 138 places, 175 transitions, 2051 flow. Second operand 6 states and 155 transitions. [2024-06-27 19:32:17,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 203 transitions, 2605 flow [2024-06-27 19:32:17,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 203 transitions, 2512 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:17,343 INFO L231 Difference]: Finished difference. Result has 140 places, 177 transitions, 2165 flow [2024-06-27 19:32:17,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1960, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2165, PETRI_PLACES=140, PETRI_TRANSITIONS=177} [2024-06-27 19:32:17,344 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 100 predicate places. [2024-06-27 19:32:17,344 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 177 transitions, 2165 flow [2024-06-27 19:32:17,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:17,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:17,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:17,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:32:17,344 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)] === [2024-06-27 19:32:17,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:17,345 INFO L85 PathProgramCache]: Analyzing trace with hash -740496853, now seen corresponding path program 6 times [2024-06-27 19:32:17,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:17,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387186944] [2024-06-27 19:32:17,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:17,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:17,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:17,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387186944] [2024-06-27 19:32:17,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387186944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:17,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:17,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:17,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121834146] [2024-06-27 19:32:17,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:17,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:17,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:17,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:17,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:17,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:17,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 177 transitions, 2165 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:17,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:17,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:17,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:17,697 INFO L124 PetriNetUnfolderBase]: 1080/1837 cut-off events. [2024-06-27 19:32:17,697 INFO L125 PetriNetUnfolderBase]: For 36449/36449 co-relation queries the response was YES. [2024-06-27 19:32:17,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10553 conditions, 1837 events. 1080/1837 cut-off events. For 36449/36449 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 9966 event pairs, 254 based on Foata normal form. 2/1838 useless extension candidates. Maximal degree in co-relation 10489. Up to 1451 conditions per place. [2024-06-27 19:32:17,706 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 111 selfloop transitions, 90 changer transitions 0/208 dead transitions. [2024-06-27 19:32:17,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 208 transitions, 2699 flow [2024-06-27 19:32:17,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:17,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:17,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:32:17,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2024-06-27 19:32:17,708 INFO L175 Difference]: Start difference. First operand has 140 places, 177 transitions, 2165 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:32:17,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 208 transitions, 2699 flow [2024-06-27 19:32:17,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 208 transitions, 2590 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:17,777 INFO L231 Difference]: Finished difference. Result has 143 places, 177 transitions, 2248 flow [2024-06-27 19:32:17,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2248, PETRI_PLACES=143, PETRI_TRANSITIONS=177} [2024-06-27 19:32:17,778 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 103 predicate places. [2024-06-27 19:32:17,778 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 177 transitions, 2248 flow [2024-06-27 19:32:17,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:17,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:17,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:17,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:32:17,779 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:17,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:17,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1766300269, now seen corresponding path program 1 times [2024-06-27 19:32:17,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:17,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869512240] [2024-06-27 19:32:17,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:17,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:17,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:17,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869512240] [2024-06-27 19:32:17,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869512240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:17,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:17,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:17,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962174624] [2024-06-27 19:32:17,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:17,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:17,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:17,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:17,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:17,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-27 19:32:17,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 177 transitions, 2248 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) [2024-06-27 19:32:17,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:17,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-27 19:32:17,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:18,060 INFO L124 PetriNetUnfolderBase]: 1063/1852 cut-off events. [2024-06-27 19:32:18,061 INFO L125 PetriNetUnfolderBase]: For 38281/38313 co-relation queries the response was YES. [2024-06-27 19:32:18,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10613 conditions, 1852 events. 1063/1852 cut-off events. For 38281/38313 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 10380 event pairs, 208 based on Foata normal form. 6/1832 useless extension candidates. Maximal degree in co-relation 10550. Up to 1477 conditions per place. [2024-06-27 19:32:18,074 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 155 selfloop transitions, 24 changer transitions 0/203 dead transitions. [2024-06-27 19:32:18,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 203 transitions, 2762 flow [2024-06-27 19:32:18,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:18,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:18,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:32:18,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6239316239316239 [2024-06-27 19:32:18,075 INFO L175 Difference]: Start difference. First operand has 143 places, 177 transitions, 2248 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:32:18,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 203 transitions, 2762 flow [2024-06-27 19:32:18,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 203 transitions, 2601 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:18,151 INFO L231 Difference]: Finished difference. Result has 143 places, 179 transitions, 2163 flow [2024-06-27 19:32:18,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2089, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2163, PETRI_PLACES=143, PETRI_TRANSITIONS=179} [2024-06-27 19:32:18,152 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 103 predicate places. [2024-06-27 19:32:18,152 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 179 transitions, 2163 flow [2024-06-27 19:32:18,152 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) [2024-06-27 19:32:18,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:18,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:18,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:32:18,153 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:18,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:18,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1769157229, now seen corresponding path program 2 times [2024-06-27 19:32:18,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:18,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534004095] [2024-06-27 19:32:18,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:18,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:18,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:18,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:18,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534004095] [2024-06-27 19:32:18,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534004095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:18,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:18,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:18,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114639455] [2024-06-27 19:32:18,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:18,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:18,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:18,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:18,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:18,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-27 19:32:18,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 179 transitions, 2163 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) [2024-06-27 19:32:18,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:18,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-27 19:32:18,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:18,469 INFO L124 PetriNetUnfolderBase]: 1099/1908 cut-off events. [2024-06-27 19:32:18,469 INFO L125 PetriNetUnfolderBase]: For 39958/39982 co-relation queries the response was YES. [2024-06-27 19:32:18,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10748 conditions, 1908 events. 1099/1908 cut-off events. For 39958/39982 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 10788 event pairs, 239 based on Foata normal form. 8/1892 useless extension candidates. Maximal degree in co-relation 10685. Up to 1600 conditions per place. [2024-06-27 19:32:18,484 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 151 selfloop transitions, 22 changer transitions 0/197 dead transitions. [2024-06-27 19:32:18,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 197 transitions, 2577 flow [2024-06-27 19:32:18,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:18,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:18,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-27 19:32:18,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982905982905983 [2024-06-27 19:32:18,486 INFO L175 Difference]: Start difference. First operand has 143 places, 179 transitions, 2163 flow. Second operand 6 states and 140 transitions. [2024-06-27 19:32:18,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 197 transitions, 2577 flow [2024-06-27 19:32:18,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 197 transitions, 2546 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:18,552 INFO L231 Difference]: Finished difference. Result has 147 places, 180 transitions, 2196 flow [2024-06-27 19:32:18,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2132, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2196, PETRI_PLACES=147, PETRI_TRANSITIONS=180} [2024-06-27 19:32:18,552 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 107 predicate places. [2024-06-27 19:32:18,552 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 180 transitions, 2196 flow [2024-06-27 19:32:18,553 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) [2024-06-27 19:32:18,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:18,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:18,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:32:18,553 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:18,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:18,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1538234609, now seen corresponding path program 3 times [2024-06-27 19:32:18,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:18,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932112468] [2024-06-27 19:32:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:18,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:18,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:18,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932112468] [2024-06-27 19:32:18,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932112468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:18,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:18,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:18,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292565542] [2024-06-27 19:32:18,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:18,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:18,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:18,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:18,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:18,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-27 19:32:18,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 180 transitions, 2196 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) [2024-06-27 19:32:18,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:18,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-27 19:32:18,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:18,877 INFO L124 PetriNetUnfolderBase]: 1078/1877 cut-off events. [2024-06-27 19:32:18,878 INFO L125 PetriNetUnfolderBase]: For 38734/38758 co-relation queries the response was YES. [2024-06-27 19:32:18,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10468 conditions, 1877 events. 1078/1877 cut-off events. For 38734/38758 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 10561 event pairs, 204 based on Foata normal form. 10/1863 useless extension candidates. Maximal degree in co-relation 10403. Up to 1550 conditions per place. [2024-06-27 19:32:18,890 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 156 selfloop transitions, 19 changer transitions 0/199 dead transitions. [2024-06-27 19:32:18,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 199 transitions, 2608 flow [2024-06-27 19:32:18,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:18,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:18,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-27 19:32:18,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-27 19:32:18,891 INFO L175 Difference]: Start difference. First operand has 147 places, 180 transitions, 2196 flow. Second operand 5 states and 125 transitions. [2024-06-27 19:32:18,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 199 transitions, 2608 flow [2024-06-27 19:32:18,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 199 transitions, 2562 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:18,964 INFO L231 Difference]: Finished difference. Result has 148 places, 180 transitions, 2197 flow [2024-06-27 19:32:18,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2150, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2197, PETRI_PLACES=148, PETRI_TRANSITIONS=180} [2024-06-27 19:32:18,965 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 108 predicate places. [2024-06-27 19:32:18,965 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 180 transitions, 2197 flow [2024-06-27 19:32:18,965 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) [2024-06-27 19:32:18,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:18,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:18,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:32:18,965 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:18,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:18,966 INFO L85 PathProgramCache]: Analyzing trace with hash -700062251, now seen corresponding path program 1 times [2024-06-27 19:32:18,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:18,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108384607] [2024-06-27 19:32:18,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:18,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:19,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:19,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108384607] [2024-06-27 19:32:19,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108384607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:19,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:19,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:19,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871953315] [2024-06-27 19:32:19,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:19,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:19,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:19,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:19,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:19,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:19,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 180 transitions, 2197 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:19,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:19,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:19,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:19,286 INFO L124 PetriNetUnfolderBase]: 1151/1952 cut-off events. [2024-06-27 19:32:19,286 INFO L125 PetriNetUnfolderBase]: For 41616/41616 co-relation queries the response was YES. [2024-06-27 19:32:19,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11093 conditions, 1952 events. 1151/1952 cut-off events. For 41616/41616 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 10708 event pairs, 270 based on Foata normal form. 1/1951 useless extension candidates. Maximal degree in co-relation 11027. Up to 1623 conditions per place. [2024-06-27 19:32:19,298 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 132 selfloop transitions, 65 changer transitions 0/204 dead transitions. [2024-06-27 19:32:19,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 204 transitions, 2711 flow [2024-06-27 19:32:19,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:19,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:19,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 19:32:19,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6117216117216118 [2024-06-27 19:32:19,300 INFO L175 Difference]: Start difference. First operand has 148 places, 180 transitions, 2197 flow. Second operand 7 states and 167 transitions. [2024-06-27 19:32:19,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 204 transitions, 2711 flow [2024-06-27 19:32:19,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 204 transitions, 2667 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:19,392 INFO L231 Difference]: Finished difference. Result has 151 places, 180 transitions, 2289 flow [2024-06-27 19:32:19,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2153, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2289, PETRI_PLACES=151, PETRI_TRANSITIONS=180} [2024-06-27 19:32:19,393 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 111 predicate places. [2024-06-27 19:32:19,393 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 180 transitions, 2289 flow [2024-06-27 19:32:19,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:19,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:19,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:19,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:32:19,394 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:19,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:19,394 INFO L85 PathProgramCache]: Analyzing trace with hash -707683787, now seen corresponding path program 1 times [2024-06-27 19:32:19,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:19,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498431611] [2024-06-27 19:32:19,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:19,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:19,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:19,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498431611] [2024-06-27 19:32:19,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498431611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:19,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:19,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:19,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419506994] [2024-06-27 19:32:19,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:19,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:19,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:19,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:19,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:19,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:19,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 180 transitions, 2289 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:19,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:19,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:19,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:19,771 INFO L124 PetriNetUnfolderBase]: 1233/2076 cut-off events. [2024-06-27 19:32:19,771 INFO L125 PetriNetUnfolderBase]: For 52367/52367 co-relation queries the response was YES. [2024-06-27 19:32:19,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11923 conditions, 2076 events. 1233/2076 cut-off events. For 52367/52367 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 11473 event pairs, 217 based on Foata normal form. 10/2084 useless extension candidates. Maximal degree in co-relation 11856. Up to 1498 conditions per place. [2024-06-27 19:32:19,786 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 143 selfloop transitions, 70 changer transitions 0/220 dead transitions. [2024-06-27 19:32:19,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 220 transitions, 2997 flow [2024-06-27 19:32:19,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:19,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:19,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:32:19,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6483516483516484 [2024-06-27 19:32:19,787 INFO L175 Difference]: Start difference. First operand has 151 places, 180 transitions, 2289 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:32:19,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 220 transitions, 2997 flow [2024-06-27 19:32:19,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 220 transitions, 2813 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:19,872 INFO L231 Difference]: Finished difference. Result has 151 places, 184 transitions, 2298 flow [2024-06-27 19:32:19,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2105, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2298, PETRI_PLACES=151, PETRI_TRANSITIONS=184} [2024-06-27 19:32:19,873 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 111 predicate places. [2024-06-27 19:32:19,873 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 184 transitions, 2298 flow [2024-06-27 19:32:19,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:19,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:19,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:19,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:32:19,874 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:19,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:19,874 INFO L85 PathProgramCache]: Analyzing trace with hash -700065227, now seen corresponding path program 2 times [2024-06-27 19:32:19,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:19,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303119947] [2024-06-27 19:32:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:19,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:19,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:19,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:19,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303119947] [2024-06-27 19:32:19,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303119947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:19,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:19,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:19,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887984401] [2024-06-27 19:32:19,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:19,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:19,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:19,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:19,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:19,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:19,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 184 transitions, 2298 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:19,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:19,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:19,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:20,245 INFO L124 PetriNetUnfolderBase]: 1269/2131 cut-off events. [2024-06-27 19:32:20,245 INFO L125 PetriNetUnfolderBase]: For 55632/55632 co-relation queries the response was YES. [2024-06-27 19:32:20,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12306 conditions, 2131 events. 1269/2131 cut-off events. For 55632/55632 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 11792 event pairs, 292 based on Foata normal form. 10/2139 useless extension candidates. Maximal degree in co-relation 12239. Up to 1767 conditions per place. [2024-06-27 19:32:20,258 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 140 selfloop transitions, 67 changer transitions 0/214 dead transitions. [2024-06-27 19:32:20,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 214 transitions, 2884 flow [2024-06-27 19:32:20,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:20,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:20,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:32:20,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6227106227106227 [2024-06-27 19:32:20,260 INFO L175 Difference]: Start difference. First operand has 151 places, 184 transitions, 2298 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:32:20,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 214 transitions, 2884 flow [2024-06-27 19:32:20,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 214 transitions, 2784 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:20,357 INFO L231 Difference]: Finished difference. Result has 155 places, 186 transitions, 2368 flow [2024-06-27 19:32:20,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2200, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2368, PETRI_PLACES=155, PETRI_TRANSITIONS=186} [2024-06-27 19:32:20,357 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 115 predicate places. [2024-06-27 19:32:20,357 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 186 transitions, 2368 flow [2024-06-27 19:32:20,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:20,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:20,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:20,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:32:20,358 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)] === [2024-06-27 19:32:20,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:20,358 INFO L85 PathProgramCache]: Analyzing trace with hash -589263911, now seen corresponding path program 2 times [2024-06-27 19:32:20,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:20,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462080517] [2024-06-27 19:32:20,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:20,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:20,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:20,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462080517] [2024-06-27 19:32:20,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462080517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:20,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:20,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:20,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835332517] [2024-06-27 19:32:20,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:20,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:20,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:20,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:20,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:20,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:20,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 186 transitions, 2368 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:20,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:20,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:20,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:20,698 INFO L124 PetriNetUnfolderBase]: 1274/2139 cut-off events. [2024-06-27 19:32:20,698 INFO L125 PetriNetUnfolderBase]: For 53565/53565 co-relation queries the response was YES. [2024-06-27 19:32:20,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12633 conditions, 2139 events. 1274/2139 cut-off events. For 53565/53565 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 11860 event pairs, 298 based on Foata normal form. 1/2138 useless extension candidates. Maximal degree in co-relation 12564. Up to 1811 conditions per place. [2024-06-27 19:32:20,714 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 139 selfloop transitions, 64 changer transitions 0/210 dead transitions. [2024-06-27 19:32:20,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 210 transitions, 2927 flow [2024-06-27 19:32:20,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:20,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:20,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 19:32:20,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007326007326007 [2024-06-27 19:32:20,716 INFO L175 Difference]: Start difference. First operand has 155 places, 186 transitions, 2368 flow. Second operand 7 states and 164 transitions. [2024-06-27 19:32:20,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 210 transitions, 2927 flow [2024-06-27 19:32:20,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 210 transitions, 2781 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:20,784 INFO L231 Difference]: Finished difference. Result has 157 places, 189 transitions, 2391 flow [2024-06-27 19:32:20,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2228, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2391, PETRI_PLACES=157, PETRI_TRANSITIONS=189} [2024-06-27 19:32:20,784 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 117 predicate places. [2024-06-27 19:32:20,785 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 189 transitions, 2391 flow [2024-06-27 19:32:20,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:20,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:20,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:20,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:32:20,785 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)] === [2024-06-27 19:32:20,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:20,786 INFO L85 PathProgramCache]: Analyzing trace with hash 259614678, now seen corresponding path program 1 times [2024-06-27 19:32:20,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:20,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382037752] [2024-06-27 19:32:20,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:20,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:20,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:20,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382037752] [2024-06-27 19:32:20,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382037752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:20,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:20,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:20,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084022344] [2024-06-27 19:32:20,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:20,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:20,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:20,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:20,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:20,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:20,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 189 transitions, 2391 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:20,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:20,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:20,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:21,173 INFO L124 PetriNetUnfolderBase]: 1300/2183 cut-off events. [2024-06-27 19:32:21,173 INFO L125 PetriNetUnfolderBase]: For 58198/58198 co-relation queries the response was YES. [2024-06-27 19:32:21,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13018 conditions, 2183 events. 1300/2183 cut-off events. For 58198/58198 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12170 event pairs, 299 based on Foata normal form. 2/2183 useless extension candidates. Maximal degree in co-relation 12948. Up to 1706 conditions per place. [2024-06-27 19:32:21,187 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 102 selfloop transitions, 114 changer transitions 0/223 dead transitions. [2024-06-27 19:32:21,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 223 transitions, 3191 flow [2024-06-27 19:32:21,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:21,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:21,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 19:32:21,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 19:32:21,189 INFO L175 Difference]: Start difference. First operand has 157 places, 189 transitions, 2391 flow. Second operand 7 states and 169 transitions. [2024-06-27 19:32:21,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 223 transitions, 3191 flow [2024-06-27 19:32:21,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 223 transitions, 3095 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:21,294 INFO L231 Difference]: Finished difference. Result has 161 places, 201 transitions, 2757 flow [2024-06-27 19:32:21,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2295, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2757, PETRI_PLACES=161, PETRI_TRANSITIONS=201} [2024-06-27 19:32:21,295 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 121 predicate places. [2024-06-27 19:32:21,295 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 201 transitions, 2757 flow [2024-06-27 19:32:21,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:21,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:21,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:21,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:32:21,296 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:21,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:21,296 INFO L85 PathProgramCache]: Analyzing trace with hash -441446580, now seen corresponding path program 2 times [2024-06-27 19:32:21,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:21,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185574742] [2024-06-27 19:32:21,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:21,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:21,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:21,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185574742] [2024-06-27 19:32:21,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185574742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:21,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:21,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:21,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729008373] [2024-06-27 19:32:21,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:21,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:21,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:21,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:21,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:21,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:21,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 201 transitions, 2757 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:21,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:21,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:21,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:21,633 INFO L124 PetriNetUnfolderBase]: 1310/2208 cut-off events. [2024-06-27 19:32:21,633 INFO L125 PetriNetUnfolderBase]: For 62401/62401 co-relation queries the response was YES. [2024-06-27 19:32:21,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13565 conditions, 2208 events. 1310/2208 cut-off events. For 62401/62401 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 12395 event pairs, 293 based on Foata normal form. 2/2209 useless extension candidates. Maximal degree in co-relation 13493. Up to 1936 conditions per place. [2024-06-27 19:32:21,649 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 172 selfloop transitions, 46 changer transitions 0/225 dead transitions. [2024-06-27 19:32:21,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 225 transitions, 3386 flow [2024-06-27 19:32:21,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:32:21,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:32:21,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-27 19:32:21,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-27 19:32:21,650 INFO L175 Difference]: Start difference. First operand has 161 places, 201 transitions, 2757 flow. Second operand 9 states and 198 transitions. [2024-06-27 19:32:21,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 225 transitions, 3386 flow [2024-06-27 19:32:21,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 225 transitions, 3237 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:21,762 INFO L231 Difference]: Finished difference. Result has 167 places, 205 transitions, 2786 flow [2024-06-27 19:32:21,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2611, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2786, PETRI_PLACES=167, PETRI_TRANSITIONS=205} [2024-06-27 19:32:21,763 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 127 predicate places. [2024-06-27 19:32:21,763 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 205 transitions, 2786 flow [2024-06-27 19:32:21,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:21,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:21,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:21,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:32:21,764 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:21,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:21,764 INFO L85 PathProgramCache]: Analyzing trace with hash -441653970, now seen corresponding path program 3 times [2024-06-27 19:32:21,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:21,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483433949] [2024-06-27 19:32:21,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:21,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:21,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:21,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483433949] [2024-06-27 19:32:21,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483433949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:21,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:21,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:21,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839258107] [2024-06-27 19:32:21,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:21,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:21,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:21,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:21,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:21,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:21,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 205 transitions, 2786 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:21,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:21,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:21,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:22,169 INFO L124 PetriNetUnfolderBase]: 1302/2196 cut-off events. [2024-06-27 19:32:22,169 INFO L125 PetriNetUnfolderBase]: For 64001/64001 co-relation queries the response was YES. [2024-06-27 19:32:22,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13284 conditions, 2196 events. 1302/2196 cut-off events. For 64001/64001 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 12297 event pairs, 293 based on Foata normal form. 2/2197 useless extension candidates. Maximal degree in co-relation 13211. Up to 1928 conditions per place. [2024-06-27 19:32:22,186 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 169 selfloop transitions, 47 changer transitions 0/223 dead transitions. [2024-06-27 19:32:22,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 223 transitions, 3262 flow [2024-06-27 19:32:22,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:22,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:22,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-27 19:32:22,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-27 19:32:22,188 INFO L175 Difference]: Start difference. First operand has 167 places, 205 transitions, 2786 flow. Second operand 8 states and 180 transitions. [2024-06-27 19:32:22,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 223 transitions, 3262 flow [2024-06-27 19:32:22,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 223 transitions, 3172 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:22,314 INFO L231 Difference]: Finished difference. Result has 169 places, 205 transitions, 2797 flow [2024-06-27 19:32:22,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2696, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2797, PETRI_PLACES=169, PETRI_TRANSITIONS=205} [2024-06-27 19:32:22,315 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 129 predicate places. [2024-06-27 19:32:22,315 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 205 transitions, 2797 flow [2024-06-27 19:32:22,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:22,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:22,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:22,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:32:22,316 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:22,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:22,316 INFO L85 PathProgramCache]: Analyzing trace with hash -441777257, now seen corresponding path program 3 times [2024-06-27 19:32:22,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:22,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141921201] [2024-06-27 19:32:22,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:22,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:22,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:22,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141921201] [2024-06-27 19:32:22,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141921201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:22,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:22,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:22,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620674802] [2024-06-27 19:32:22,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:22,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:22,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:22,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:22,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:22,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:22,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 205 transitions, 2797 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:22,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:22,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:22,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:22,755 INFO L124 PetriNetUnfolderBase]: 1338/2252 cut-off events. [2024-06-27 19:32:22,755 INFO L125 PetriNetUnfolderBase]: For 72798/72798 co-relation queries the response was YES. [2024-06-27 19:32:22,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13607 conditions, 2252 events. 1338/2252 cut-off events. For 72798/72798 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 12665 event pairs, 296 based on Foata normal form. 10/2261 useless extension candidates. Maximal degree in co-relation 13533. Up to 1986 conditions per place. [2024-06-27 19:32:22,772 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 197 selfloop transitions, 25 changer transitions 0/229 dead transitions. [2024-06-27 19:32:22,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 229 transitions, 3335 flow [2024-06-27 19:32:22,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:22,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:22,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-27 19:32:22,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673076923076923 [2024-06-27 19:32:22,774 INFO L175 Difference]: Start difference. First operand has 169 places, 205 transitions, 2797 flow. Second operand 8 states and 177 transitions. [2024-06-27 19:32:22,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 229 transitions, 3335 flow [2024-06-27 19:32:22,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 229 transitions, 3198 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 19:32:22,890 INFO L231 Difference]: Finished difference. Result has 168 places, 207 transitions, 2748 flow [2024-06-27 19:32:22,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2660, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2748, PETRI_PLACES=168, PETRI_TRANSITIONS=207} [2024-06-27 19:32:22,891 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 128 predicate places. [2024-06-27 19:32:22,891 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 207 transitions, 2748 flow [2024-06-27 19:32:22,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:22,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:22,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:22,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:32:22,892 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:22,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:22,896 INFO L85 PathProgramCache]: Analyzing trace with hash 407439604, now seen corresponding path program 1 times [2024-06-27 19:32:22,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:22,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652602931] [2024-06-27 19:32:22,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:22,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:22,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:22,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:22,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652602931] [2024-06-27 19:32:22,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652602931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:22,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:22,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:22,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604652008] [2024-06-27 19:32:22,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:22,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:22,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:22,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:22,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:23,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:23,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 207 transitions, 2748 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:23,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:23,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:23,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:23,253 INFO L124 PetriNetUnfolderBase]: 1346/2264 cut-off events. [2024-06-27 19:32:23,254 INFO L125 PetriNetUnfolderBase]: For 70227/70227 co-relation queries the response was YES. [2024-06-27 19:32:23,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13762 conditions, 2264 events. 1346/2264 cut-off events. For 70227/70227 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 12769 event pairs, 297 based on Foata normal form. 2/2265 useless extension candidates. Maximal degree in co-relation 13687. Up to 2030 conditions per place. [2024-06-27 19:32:23,270 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 193 selfloop transitions, 27 changer transitions 0/227 dead transitions. [2024-06-27 19:32:23,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 227 transitions, 3266 flow [2024-06-27 19:32:23,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:23,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:23,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-27 19:32:23,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 19:32:23,271 INFO L175 Difference]: Start difference. First operand has 168 places, 207 transitions, 2748 flow. Second operand 7 states and 156 transitions. [2024-06-27 19:32:23,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 227 transitions, 3266 flow [2024-06-27 19:32:23,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 227 transitions, 3206 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:23,410 INFO L231 Difference]: Finished difference. Result has 169 places, 209 transitions, 2785 flow [2024-06-27 19:32:23,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2688, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2785, PETRI_PLACES=169, PETRI_TRANSITIONS=209} [2024-06-27 19:32:23,411 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 129 predicate places. [2024-06-27 19:32:23,411 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 209 transitions, 2785 flow [2024-06-27 19:32:23,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:23,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:23,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:23,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:32:23,411 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:23,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:23,412 INFO L85 PathProgramCache]: Analyzing trace with hash -2085848492, now seen corresponding path program 4 times [2024-06-27 19:32:23,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:23,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100827807] [2024-06-27 19:32:23,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:23,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:23,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:23,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100827807] [2024-06-27 19:32:23,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100827807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:23,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:23,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:23,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628188927] [2024-06-27 19:32:23,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:23,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:23,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:23,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:23,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:23,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:23,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 209 transitions, 2785 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:23,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:23,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:23,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:23,744 INFO L124 PetriNetUnfolderBase]: 1351/2266 cut-off events. [2024-06-27 19:32:23,744 INFO L125 PetriNetUnfolderBase]: For 74668/74672 co-relation queries the response was YES. [2024-06-27 19:32:23,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13916 conditions, 2266 events. 1351/2266 cut-off events. For 74668/74672 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 12737 event pairs, 341 based on Foata normal form. 2/2265 useless extension candidates. Maximal degree in co-relation 13840. Up to 1780 conditions per place. [2024-06-27 19:32:23,761 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 97 selfloop transitions, 128 changer transitions 0/232 dead transitions. [2024-06-27 19:32:23,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 232 transitions, 3570 flow [2024-06-27 19:32:23,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:23,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:23,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:32:23,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608058608058608 [2024-06-27 19:32:23,762 INFO L175 Difference]: Start difference. First operand has 169 places, 209 transitions, 2785 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:32:23,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 232 transitions, 3570 flow [2024-06-27 19:32:23,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 232 transitions, 3489 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:23,890 INFO L231 Difference]: Finished difference. Result has 171 places, 212 transitions, 3019 flow [2024-06-27 19:32:23,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2704, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3019, PETRI_PLACES=171, PETRI_TRANSITIONS=212} [2024-06-27 19:32:23,891 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 131 predicate places. [2024-06-27 19:32:23,891 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 212 transitions, 3019 flow [2024-06-27 19:32:23,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:23,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:23,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:23,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:32:23,891 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)] === [2024-06-27 19:32:23,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:23,892 INFO L85 PathProgramCache]: Analyzing trace with hash -363007865, now seen corresponding path program 3 times [2024-06-27 19:32:23,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:23,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003684136] [2024-06-27 19:32:23,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:23,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:23,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:23,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003684136] [2024-06-27 19:32:23,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003684136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:23,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:23,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:23,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486512408] [2024-06-27 19:32:23,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:23,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:23,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:23,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:23,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:23,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:23,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 212 transitions, 3019 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:23,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:23,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:23,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:24,245 INFO L124 PetriNetUnfolderBase]: 1356/2276 cut-off events. [2024-06-27 19:32:24,246 INFO L125 PetriNetUnfolderBase]: For 79072/79076 co-relation queries the response was YES. [2024-06-27 19:32:24,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14312 conditions, 2276 events. 1356/2276 cut-off events. For 79072/79076 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 12796 event pairs, 324 based on Foata normal form. 2/2275 useless extension candidates. Maximal degree in co-relation 14235. Up to 1931 conditions per place. [2024-06-27 19:32:24,262 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 155 selfloop transitions, 71 changer transitions 0/233 dead transitions. [2024-06-27 19:32:24,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 233 transitions, 3633 flow [2024-06-27 19:32:24,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:24,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 19:32:24,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-27 19:32:24,263 INFO L175 Difference]: Start difference. First operand has 171 places, 212 transitions, 3019 flow. Second operand 7 states and 161 transitions. [2024-06-27 19:32:24,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 233 transitions, 3633 flow [2024-06-27 19:32:24,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 233 transitions, 3128 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:24,410 INFO L231 Difference]: Finished difference. Result has 171 places, 215 transitions, 2700 flow [2024-06-27 19:32:24,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2520, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2700, PETRI_PLACES=171, PETRI_TRANSITIONS=215} [2024-06-27 19:32:24,410 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 131 predicate places. [2024-06-27 19:32:24,410 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 215 transitions, 2700 flow [2024-06-27 19:32:24,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:24,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:24,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:24,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:32:24,411 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)] === [2024-06-27 19:32:24,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:24,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1188092025, now seen corresponding path program 4 times [2024-06-27 19:32:24,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:24,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522021793] [2024-06-27 19:32:24,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:24,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:24,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:24,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522021793] [2024-06-27 19:32:24,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522021793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:24,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:24,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:24,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033712958] [2024-06-27 19:32:24,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:24,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:24,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:24,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:24,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:24,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:24,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 215 transitions, 2700 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:24,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:24,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:24,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:24,788 INFO L124 PetriNetUnfolderBase]: 1353/2274 cut-off events. [2024-06-27 19:32:24,788 INFO L125 PetriNetUnfolderBase]: For 78519/78523 co-relation queries the response was YES. [2024-06-27 19:32:24,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13893 conditions, 2274 events. 1353/2274 cut-off events. For 78519/78523 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 12833 event pairs, 322 based on Foata normal form. 2/2273 useless extension candidates. Maximal degree in co-relation 13816. Up to 1928 conditions per place. [2024-06-27 19:32:24,801 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 152 selfloop transitions, 71 changer transitions 0/230 dead transitions. [2024-06-27 19:32:24,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 230 transitions, 3182 flow [2024-06-27 19:32:24,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:24,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:24,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-27 19:32:24,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-27 19:32:24,802 INFO L175 Difference]: Start difference. First operand has 171 places, 215 transitions, 2700 flow. Second operand 8 states and 176 transitions. [2024-06-27 19:32:24,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 230 transitions, 3182 flow [2024-06-27 19:32:24,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 230 transitions, 3065 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:24,970 INFO L231 Difference]: Finished difference. Result has 175 places, 215 transitions, 2731 flow [2024-06-27 19:32:24,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2583, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2731, PETRI_PLACES=175, PETRI_TRANSITIONS=215} [2024-06-27 19:32:24,971 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 135 predicate places. [2024-06-27 19:32:24,971 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 215 transitions, 2731 flow [2024-06-27 19:32:24,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:24,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:24,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:24,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:32:24,971 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)] === [2024-06-27 19:32:24,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:24,971 INFO L85 PathProgramCache]: Analyzing trace with hash -980283506, now seen corresponding path program 5 times [2024-06-27 19:32:24,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:24,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157134467] [2024-06-27 19:32:24,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:24,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:25,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:25,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157134467] [2024-06-27 19:32:25,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157134467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:25,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:25,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:25,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268377139] [2024-06-27 19:32:25,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:25,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:25,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:25,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:25,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:25,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:25,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 215 transitions, 2731 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:25,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:25,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:25,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:25,308 INFO L124 PetriNetUnfolderBase]: 1358/2277 cut-off events. [2024-06-27 19:32:25,308 INFO L125 PetriNetUnfolderBase]: For 82526/82530 co-relation queries the response was YES. [2024-06-27 19:32:25,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14030 conditions, 2277 events. 1358/2277 cut-off events. For 82526/82530 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 12812 event pairs, 342 based on Foata normal form. 2/2276 useless extension candidates. Maximal degree in co-relation 13951. Up to 1786 conditions per place. [2024-06-27 19:32:25,324 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 96 selfloop transitions, 132 changer transitions 0/235 dead transitions. [2024-06-27 19:32:25,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 235 transitions, 3520 flow [2024-06-27 19:32:25,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:25,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:25,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 19:32:25,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6043956043956044 [2024-06-27 19:32:25,327 INFO L175 Difference]: Start difference. First operand has 175 places, 215 transitions, 2731 flow. Second operand 7 states and 165 transitions. [2024-06-27 19:32:25,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 235 transitions, 3520 flow [2024-06-27 19:32:25,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 235 transitions, 3262 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 19:32:25,484 INFO L231 Difference]: Finished difference. Result has 173 places, 218 transitions, 2784 flow [2024-06-27 19:32:25,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2473, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2784, PETRI_PLACES=173, PETRI_TRANSITIONS=218} [2024-06-27 19:32:25,484 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 133 predicate places. [2024-06-27 19:32:25,485 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 218 transitions, 2784 flow [2024-06-27 19:32:25,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:25,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:25,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:25,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:32:25,485 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)] === [2024-06-27 19:32:25,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:25,485 INFO L85 PathProgramCache]: Analyzing trace with hash -980272346, now seen corresponding path program 6 times [2024-06-27 19:32:25,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:25,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656349802] [2024-06-27 19:32:25,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:25,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:25,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:25,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656349802] [2024-06-27 19:32:25,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656349802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:25,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:25,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:25,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700003842] [2024-06-27 19:32:25,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:25,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:25,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:25,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:25,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:25,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:25,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 218 transitions, 2784 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:25,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:25,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:25,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:25,837 INFO L124 PetriNetUnfolderBase]: 1355/2277 cut-off events. [2024-06-27 19:32:25,837 INFO L125 PetriNetUnfolderBase]: For 82877/82877 co-relation queries the response was YES. [2024-06-27 19:32:25,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14143 conditions, 2277 events. 1355/2277 cut-off events. For 82877/82877 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 12812 event pairs, 295 based on Foata normal form. 1/2277 useless extension candidates. Maximal degree in co-relation 14064. Up to 2053 conditions per place. [2024-06-27 19:32:25,855 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 200 selfloop transitions, 25 changer transitions 0/232 dead transitions. [2024-06-27 19:32:25,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 232 transitions, 3268 flow [2024-06-27 19:32:25,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-27 19:32:25,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5604395604395604 [2024-06-27 19:32:25,856 INFO L175 Difference]: Start difference. First operand has 173 places, 218 transitions, 2784 flow. Second operand 7 states and 153 transitions. [2024-06-27 19:32:25,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 232 transitions, 3268 flow [2024-06-27 19:32:26,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 232 transitions, 2902 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:26,048 INFO L231 Difference]: Finished difference. Result has 174 places, 218 transitions, 2474 flow [2024-06-27 19:32:26,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2418, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2474, PETRI_PLACES=174, PETRI_TRANSITIONS=218} [2024-06-27 19:32:26,049 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 134 predicate places. [2024-06-27 19:32:26,049 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 218 transitions, 2474 flow [2024-06-27 19:32:26,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:26,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:26,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:26,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:32:26,049 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)] === [2024-06-27 19:32:26,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:26,050 INFO L85 PathProgramCache]: Analyzing trace with hash -241189456, now seen corresponding path program 7 times [2024-06-27 19:32:26,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:26,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725095873] [2024-06-27 19:32:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:26,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:26,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:26,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725095873] [2024-06-27 19:32:26,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725095873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:26,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:26,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:26,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587691400] [2024-06-27 19:32:26,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:26,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:26,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:26,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:26,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:26,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:26,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 218 transitions, 2474 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:26,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:26,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:26,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:26,414 INFO L124 PetriNetUnfolderBase]: 1352/2273 cut-off events. [2024-06-27 19:32:26,414 INFO L125 PetriNetUnfolderBase]: For 84061/84061 co-relation queries the response was YES. [2024-06-27 19:32:26,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13612 conditions, 2273 events. 1352/2273 cut-off events. For 84061/84061 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 12801 event pairs, 295 based on Foata normal form. 1/2273 useless extension candidates. Maximal degree in co-relation 13534. Up to 1944 conditions per place. [2024-06-27 19:32:26,430 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 183 selfloop transitions, 55 changer transitions 0/245 dead transitions. [2024-06-27 19:32:26,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 245 transitions, 3106 flow [2024-06-27 19:32:26,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:26,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:26,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:32:26,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-27 19:32:26,431 INFO L175 Difference]: Start difference. First operand has 174 places, 218 transitions, 2474 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:32:26,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 245 transitions, 3106 flow [2024-06-27 19:32:26,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 245 transitions, 2986 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 19:32:26,573 INFO L231 Difference]: Finished difference. Result has 173 places, 218 transitions, 2478 flow [2024-06-27 19:32:26,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2354, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2478, PETRI_PLACES=173, PETRI_TRANSITIONS=218} [2024-06-27 19:32:26,573 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 133 predicate places. [2024-06-27 19:32:26,573 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 218 transitions, 2478 flow [2024-06-27 19:32:26,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:26,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:26,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:26,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:32:26,574 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)] === [2024-06-27 19:32:26,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:26,574 INFO L85 PathProgramCache]: Analyzing trace with hash 568563822, now seen corresponding path program 8 times [2024-06-27 19:32:26,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:26,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256759952] [2024-06-27 19:32:26,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:26,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:26,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:26,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256759952] [2024-06-27 19:32:26,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256759952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:26,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:26,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:26,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226127784] [2024-06-27 19:32:26,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:26,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:26,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:26,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:26,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:26,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:26,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 218 transitions, 2478 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:26,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:26,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:26,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:26,969 INFO L124 PetriNetUnfolderBase]: 1362/2295 cut-off events. [2024-06-27 19:32:26,969 INFO L125 PetriNetUnfolderBase]: For 88590/88590 co-relation queries the response was YES. [2024-06-27 19:32:26,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13895 conditions, 2295 events. 1362/2295 cut-off events. For 88590/88590 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 12976 event pairs, 297 based on Foata normal form. 2/2296 useless extension candidates. Maximal degree in co-relation 13817. Up to 1871 conditions per place. [2024-06-27 19:32:26,986 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 147 selfloop transitions, 100 changer transitions 0/254 dead transitions. [2024-06-27 19:32:26,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 254 transitions, 3283 flow [2024-06-27 19:32:26,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:26,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:26,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:32:26,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-27 19:32:26,997 INFO L175 Difference]: Start difference. First operand has 173 places, 218 transitions, 2478 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:32:26,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 254 transitions, 3283 flow [2024-06-27 19:32:27,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 254 transitions, 3165 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:27,175 INFO L231 Difference]: Finished difference. Result has 176 places, 222 transitions, 2627 flow [2024-06-27 19:32:27,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2627, PETRI_PLACES=176, PETRI_TRANSITIONS=222} [2024-06-27 19:32:27,176 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 136 predicate places. [2024-06-27 19:32:27,176 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 222 transitions, 2627 flow [2024-06-27 19:32:27,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:27,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:27,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:27,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:32:27,177 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)] === [2024-06-27 19:32:27,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:27,177 INFO L85 PathProgramCache]: Analyzing trace with hash 568771212, now seen corresponding path program 9 times [2024-06-27 19:32:27,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:27,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108913839] [2024-06-27 19:32:27,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:27,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:27,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:27,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108913839] [2024-06-27 19:32:27,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108913839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:27,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:27,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:27,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828631471] [2024-06-27 19:32:27,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:27,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:27,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:27,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:27,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:27,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:27,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 222 transitions, 2627 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:27,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:27,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:27,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:27,576 INFO L124 PetriNetUnfolderBase]: 1356/2287 cut-off events. [2024-06-27 19:32:27,576 INFO L125 PetriNetUnfolderBase]: For 86746/86746 co-relation queries the response was YES. [2024-06-27 19:32:27,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13913 conditions, 2287 events. 1356/2287 cut-off events. For 86746/86746 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 12954 event pairs, 297 based on Foata normal form. 2/2288 useless extension candidates. Maximal degree in co-relation 13835. Up to 1866 conditions per place. [2024-06-27 19:32:27,591 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 150 selfloop transitions, 95 changer transitions 0/252 dead transitions. [2024-06-27 19:32:27,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 252 transitions, 3371 flow [2024-06-27 19:32:27,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:32:27,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:32:27,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-27 19:32:27,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603988603988604 [2024-06-27 19:32:27,592 INFO L175 Difference]: Start difference. First operand has 176 places, 222 transitions, 2627 flow. Second operand 9 states and 212 transitions. [2024-06-27 19:32:27,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 252 transitions, 3371 flow [2024-06-27 19:32:27,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 252 transitions, 3252 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:27,772 INFO L231 Difference]: Finished difference. Result has 180 places, 222 transitions, 2718 flow [2024-06-27 19:32:27,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2512, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2718, PETRI_PLACES=180, PETRI_TRANSITIONS=222} [2024-06-27 19:32:27,773 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 140 predicate places. [2024-06-27 19:32:27,773 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 222 transitions, 2718 flow [2024-06-27 19:32:27,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:27,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:27,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:27,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:32:27,773 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)] === [2024-06-27 19:32:27,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:27,773 INFO L85 PathProgramCache]: Analyzing trace with hash 579495972, now seen corresponding path program 10 times [2024-06-27 19:32:27,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:27,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645078525] [2024-06-27 19:32:27,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:27,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:27,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:27,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645078525] [2024-06-27 19:32:27,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645078525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:27,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:27,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:27,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032482138] [2024-06-27 19:32:27,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:27,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:27,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:27,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:27,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:27,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:27,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 222 transitions, 2718 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:27,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:27,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:27,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:28,168 INFO L124 PetriNetUnfolderBase]: 1348/2275 cut-off events. [2024-06-27 19:32:28,168 INFO L125 PetriNetUnfolderBase]: For 85252/85252 co-relation queries the response was YES. [2024-06-27 19:32:28,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13822 conditions, 2275 events. 1348/2275 cut-off events. For 85252/85252 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 12895 event pairs, 297 based on Foata normal form. 2/2276 useless extension candidates. Maximal degree in co-relation 13744. Up to 1942 conditions per place. [2024-06-27 19:32:28,184 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 185 selfloop transitions, 52 changer transitions 0/244 dead transitions. [2024-06-27 19:32:28,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 244 transitions, 3248 flow [2024-06-27 19:32:28,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:28,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 19:32:28,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6452991452991453 [2024-06-27 19:32:28,185 INFO L175 Difference]: Start difference. First operand has 180 places, 222 transitions, 2718 flow. Second operand 6 states and 151 transitions. [2024-06-27 19:32:28,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 244 transitions, 3248 flow [2024-06-27 19:32:28,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 244 transitions, 3038 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 19:32:28,378 INFO L231 Difference]: Finished difference. Result has 178 places, 222 transitions, 2632 flow [2024-06-27 19:32:28,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2508, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2632, PETRI_PLACES=178, PETRI_TRANSITIONS=222} [2024-06-27 19:32:28,379 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 138 predicate places. [2024-06-27 19:32:28,379 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 222 transitions, 2632 flow [2024-06-27 19:32:28,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:28,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:28,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:28,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:32:28,379 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)] === [2024-06-27 19:32:28,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:28,380 INFO L85 PathProgramCache]: Analyzing trace with hash -440877196, now seen corresponding path program 11 times [2024-06-27 19:32:28,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:28,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842693919] [2024-06-27 19:32:28,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:28,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:28,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:28,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842693919] [2024-06-27 19:32:28,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842693919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:28,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:28,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:28,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275219126] [2024-06-27 19:32:28,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:28,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:28,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:28,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:28,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:28,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:28,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 222 transitions, 2632 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:28,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:28,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:28,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:28,752 INFO L124 PetriNetUnfolderBase]: 1343/2269 cut-off events. [2024-06-27 19:32:28,752 INFO L125 PetriNetUnfolderBase]: For 83625/83631 co-relation queries the response was YES. [2024-06-27 19:32:28,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13623 conditions, 2269 events. 1343/2269 cut-off events. For 83625/83631 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 12845 event pairs, 309 based on Foata normal form. 7/2275 useless extension candidates. Maximal degree in co-relation 13545. Up to 1853 conditions per place. [2024-06-27 19:32:28,769 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 138 selfloop transitions, 100 changer transitions 0/245 dead transitions. [2024-06-27 19:32:28,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 245 transitions, 3166 flow [2024-06-27 19:32:28,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:28,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:32:28,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6227106227106227 [2024-06-27 19:32:28,770 INFO L175 Difference]: Start difference. First operand has 178 places, 222 transitions, 2632 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:32:28,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 245 transitions, 3166 flow [2024-06-27 19:32:28,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 245 transitions, 3052 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:28,895 INFO L231 Difference]: Finished difference. Result has 180 places, 222 transitions, 2724 flow [2024-06-27 19:32:28,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2518, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2724, PETRI_PLACES=180, PETRI_TRANSITIONS=222} [2024-06-27 19:32:28,895 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 140 predicate places. [2024-06-27 19:32:28,896 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 222 transitions, 2724 flow [2024-06-27 19:32:28,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:28,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:28,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:28,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:32:28,896 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)] === [2024-06-27 19:32:28,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:28,896 INFO L85 PathProgramCache]: Analyzing trace with hash -618132003, now seen corresponding path program 4 times [2024-06-27 19:32:28,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:28,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216240029] [2024-06-27 19:32:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:28,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:28,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:28,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216240029] [2024-06-27 19:32:28,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216240029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:28,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:28,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:28,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321798174] [2024-06-27 19:32:28,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:28,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:28,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:28,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:28,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:29,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:29,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 222 transitions, 2724 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:29,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:29,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:29,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:29,278 INFO L124 PetriNetUnfolderBase]: 1366/2304 cut-off events. [2024-06-27 19:32:29,278 INFO L125 PetriNetUnfolderBase]: For 94125/94125 co-relation queries the response was YES. [2024-06-27 19:32:29,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13867 conditions, 2304 events. 1366/2304 cut-off events. For 94125/94125 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 13080 event pairs, 221 based on Foata normal form. 10/2313 useless extension candidates. Maximal degree in co-relation 13788. Up to 1787 conditions per place. [2024-06-27 19:32:29,295 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 197 selfloop transitions, 56 changer transitions 0/260 dead transitions. [2024-06-27 19:32:29,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 260 transitions, 3346 flow [2024-06-27 19:32:29,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:29,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:29,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:32:29,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2024-06-27 19:32:29,296 INFO L175 Difference]: Start difference. First operand has 180 places, 222 transitions, 2724 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:32:29,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 260 transitions, 3346 flow [2024-06-27 19:32:29,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 260 transitions, 2947 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 19:32:29,464 INFO L231 Difference]: Finished difference. Result has 178 places, 223 transitions, 2463 flow [2024-06-27 19:32:29,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2325, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2463, PETRI_PLACES=178, PETRI_TRANSITIONS=223} [2024-06-27 19:32:29,465 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 138 predicate places. [2024-06-27 19:32:29,465 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 223 transitions, 2463 flow [2024-06-27 19:32:29,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:29,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:29,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:29,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:32:29,465 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)] === [2024-06-27 19:32:29,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:29,465 INFO L85 PathProgramCache]: Analyzing trace with hash -607068630, now seen corresponding path program 2 times [2024-06-27 19:32:29,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:29,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806128891] [2024-06-27 19:32:29,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:29,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:29,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:29,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806128891] [2024-06-27 19:32:29,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806128891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:29,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:29,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:29,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134527930] [2024-06-27 19:32:29,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:29,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:29,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:29,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:29,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:29,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:29,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 223 transitions, 2463 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:29,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:29,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:29,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:29,825 INFO L124 PetriNetUnfolderBase]: 1374/2316 cut-off events. [2024-06-27 19:32:29,825 INFO L125 PetriNetUnfolderBase]: For 88484/88484 co-relation queries the response was YES. [2024-06-27 19:32:29,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13932 conditions, 2316 events. 1374/2316 cut-off events. For 88484/88484 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 13141 event pairs, 302 based on Foata normal form. 2/2317 useless extension candidates. Maximal degree in co-relation 13852. Up to 2082 conditions per place. [2024-06-27 19:32:29,843 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 213 selfloop transitions, 21 changer transitions 0/241 dead transitions. [2024-06-27 19:32:29,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 241 transitions, 3009 flow [2024-06-27 19:32:29,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:29,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:29,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-27 19:32:29,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-27 19:32:29,844 INFO L175 Difference]: Start difference. First operand has 178 places, 223 transitions, 2463 flow. Second operand 5 states and 120 transitions. [2024-06-27 19:32:29,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 241 transitions, 3009 flow [2024-06-27 19:32:30,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 241 transitions, 2893 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:30,080 INFO L231 Difference]: Finished difference. Result has 177 places, 225 transitions, 2436 flow [2024-06-27 19:32:30,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2347, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2436, PETRI_PLACES=177, PETRI_TRANSITIONS=225} [2024-06-27 19:32:30,080 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 137 predicate places. [2024-06-27 19:32:30,080 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 225 transitions, 2436 flow [2024-06-27 19:32:30,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:30,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:30,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:30,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:32:30,081 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)] === [2024-06-27 19:32:30,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:30,081 INFO L85 PathProgramCache]: Analyzing trace with hash -233562960, now seen corresponding path program 3 times [2024-06-27 19:32:30,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:30,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603200369] [2024-06-27 19:32:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:30,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:30,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:30,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603200369] [2024-06-27 19:32:30,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603200369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:30,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:30,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:30,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012307994] [2024-06-27 19:32:30,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:30,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:30,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:30,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:30,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:30,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:30,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 225 transitions, 2436 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:30,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:30,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:30,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:30,438 INFO L124 PetriNetUnfolderBase]: 1382/2330 cut-off events. [2024-06-27 19:32:30,438 INFO L125 PetriNetUnfolderBase]: For 88477/88477 co-relation queries the response was YES. [2024-06-27 19:32:30,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13880 conditions, 2330 events. 1382/2330 cut-off events. For 88477/88477 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 13254 event pairs, 291 based on Foata normal form. 2/2331 useless extension candidates. Maximal degree in co-relation 13799. Up to 2080 conditions per place. [2024-06-27 19:32:30,454 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 213 selfloop transitions, 25 changer transitions 0/245 dead transitions. [2024-06-27 19:32:30,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 245 transitions, 2998 flow [2024-06-27 19:32:30,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:30,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:30,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 19:32:30,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.594017094017094 [2024-06-27 19:32:30,455 INFO L175 Difference]: Start difference. First operand has 177 places, 225 transitions, 2436 flow. Second operand 6 states and 139 transitions. [2024-06-27 19:32:30,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 245 transitions, 2998 flow [2024-06-27 19:32:30,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 245 transitions, 2925 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:30,656 INFO L231 Difference]: Finished difference. Result has 180 places, 227 transitions, 2464 flow [2024-06-27 19:32:30,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2363, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2464, PETRI_PLACES=180, PETRI_TRANSITIONS=227} [2024-06-27 19:32:30,656 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 140 predicate places. [2024-06-27 19:32:30,656 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 227 transitions, 2464 flow [2024-06-27 19:32:30,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:30,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:30,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:30,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:32:30,657 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)] === [2024-06-27 19:32:30,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:30,657 INFO L85 PathProgramCache]: Analyzing trace with hash -617793390, now seen corresponding path program 4 times [2024-06-27 19:32:30,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:30,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028430987] [2024-06-27 19:32:30,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:30,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:30,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:30,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028430987] [2024-06-27 19:32:30,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028430987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:30,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:30,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:30,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38987850] [2024-06-27 19:32:30,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:30,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:30,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:30,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:30,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:30,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:30,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 227 transitions, 2464 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:30,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:30,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:30,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:31,030 INFO L124 PetriNetUnfolderBase]: 1377/2323 cut-off events. [2024-06-27 19:32:31,030 INFO L125 PetriNetUnfolderBase]: For 89753/89753 co-relation queries the response was YES. [2024-06-27 19:32:31,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13823 conditions, 2323 events. 1377/2323 cut-off events. For 89753/89753 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 13195 event pairs, 301 based on Foata normal form. 2/2324 useless extension candidates. Maximal degree in co-relation 13741. Up to 2075 conditions per place. [2024-06-27 19:32:31,046 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 210 selfloop transitions, 29 changer transitions 0/246 dead transitions. [2024-06-27 19:32:31,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 246 transitions, 3030 flow [2024-06-27 19:32:31,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:31,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:31,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-27 19:32:31,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-27 19:32:31,049 INFO L175 Difference]: Start difference. First operand has 180 places, 227 transitions, 2464 flow. Second operand 6 states and 138 transitions. [2024-06-27 19:32:31,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 246 transitions, 3030 flow [2024-06-27 19:32:31,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 246 transitions, 2945 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:31,260 INFO L231 Difference]: Finished difference. Result has 182 places, 229 transitions, 2495 flow [2024-06-27 19:32:31,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2495, PETRI_PLACES=182, PETRI_TRANSITIONS=229} [2024-06-27 19:32:31,260 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 142 predicate places. [2024-06-27 19:32:31,260 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 229 transitions, 2495 flow [2024-06-27 19:32:31,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:31,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:31,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:31,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:32:31,261 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)] === [2024-06-27 19:32:31,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:31,261 INFO L85 PathProgramCache]: Analyzing trace with hash -233557008, now seen corresponding path program 1 times [2024-06-27 19:32:31,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:31,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769474634] [2024-06-27 19:32:31,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:31,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:31,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:31,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769474634] [2024-06-27 19:32:31,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769474634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:31,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:31,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:31,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326484023] [2024-06-27 19:32:31,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:31,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:31,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:31,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:31,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:31,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:31,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 229 transitions, 2495 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:31,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:31,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:31,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:31,716 INFO L124 PetriNetUnfolderBase]: 1364/2304 cut-off events. [2024-06-27 19:32:31,716 INFO L125 PetriNetUnfolderBase]: For 90797/90797 co-relation queries the response was YES. [2024-06-27 19:32:31,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13524 conditions, 2304 events. 1364/2304 cut-off events. For 90797/90797 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 13051 event pairs, 258 based on Foata normal form. 6/2309 useless extension candidates. Maximal degree in co-relation 13441. Up to 1991 conditions per place. [2024-06-27 19:32:31,733 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 224 selfloop transitions, 22 changer transitions 0/253 dead transitions. [2024-06-27 19:32:31,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 253 transitions, 3071 flow [2024-06-27 19:32:31,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:31,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:31,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 19:32:31,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-27 19:32:31,734 INFO L175 Difference]: Start difference. First operand has 182 places, 229 transitions, 2495 flow. Second operand 6 states and 144 transitions. [2024-06-27 19:32:31,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 253 transitions, 3071 flow [2024-06-27 19:32:31,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 253 transitions, 2975 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:31,943 INFO L231 Difference]: Finished difference. Result has 184 places, 229 transitions, 2447 flow [2024-06-27 19:32:31,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2399, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2447, PETRI_PLACES=184, PETRI_TRANSITIONS=229} [2024-06-27 19:32:31,944 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 144 predicate places. [2024-06-27 19:32:31,944 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 229 transitions, 2447 flow [2024-06-27 19:32:31,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:31,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:31,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:31,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:32:31,944 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)] === [2024-06-27 19:32:31,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:31,945 INFO L85 PathProgramCache]: Analyzing trace with hash 318330054, now seen corresponding path program 1 times [2024-06-27 19:32:31,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:31,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960436731] [2024-06-27 19:32:31,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:31,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:32,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:32,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960436731] [2024-06-27 19:32:32,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960436731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:32,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:32,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:32,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91709279] [2024-06-27 19:32:32,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:32,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:32,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:32,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:32,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:32,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:32,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 229 transitions, 2447 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:32,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:32,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:32,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:32,354 INFO L124 PetriNetUnfolderBase]: 1369/2308 cut-off events. [2024-06-27 19:32:32,354 INFO L125 PetriNetUnfolderBase]: For 84331/84331 co-relation queries the response was YES. [2024-06-27 19:32:32,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13467 conditions, 2308 events. 1369/2308 cut-off events. For 84331/84331 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 13114 event pairs, 302 based on Foata normal form. 1/2307 useless extension candidates. Maximal degree in co-relation 13383. Up to 1815 conditions per place. [2024-06-27 19:32:32,370 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 111 selfloop transitions, 140 changer transitions 0/258 dead transitions. [2024-06-27 19:32:32,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 258 transitions, 3240 flow [2024-06-27 19:32:32,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:32,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:32,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:32:32,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6121794871794872 [2024-06-27 19:32:32,371 INFO L175 Difference]: Start difference. First operand has 184 places, 229 transitions, 2447 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:32:32,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 258 transitions, 3240 flow [2024-06-27 19:32:32,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 258 transitions, 3176 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:32,589 INFO L231 Difference]: Finished difference. Result has 187 places, 232 transitions, 2700 flow [2024-06-27 19:32:32,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2383, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2700, PETRI_PLACES=187, PETRI_TRANSITIONS=232} [2024-06-27 19:32:32,590 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 147 predicate places. [2024-06-27 19:32:32,590 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 232 transitions, 2700 flow [2024-06-27 19:32:32,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:32,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:32,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:32,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:32:32,591 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)] === [2024-06-27 19:32:32,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:32,591 INFO L85 PathProgramCache]: Analyzing trace with hash 318537444, now seen corresponding path program 2 times [2024-06-27 19:32:32,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:32,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69731686] [2024-06-27 19:32:32,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:32,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:32,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:32,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69731686] [2024-06-27 19:32:32,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69731686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:32,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:32,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:32,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338616341] [2024-06-27 19:32:32,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:32,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:32,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:32,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:32,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:32,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:32,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 232 transitions, 2700 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:32,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:32,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:32,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:33,012 INFO L124 PetriNetUnfolderBase]: 1366/2304 cut-off events. [2024-06-27 19:32:33,013 INFO L125 PetriNetUnfolderBase]: For 86739/86739 co-relation queries the response was YES. [2024-06-27 19:32:33,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13625 conditions, 2304 events. 1366/2304 cut-off events. For 86739/86739 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 13075 event pairs, 302 based on Foata normal form. 1/2303 useless extension candidates. Maximal degree in co-relation 13541. Up to 1812 conditions per place. [2024-06-27 19:32:33,030 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 111 selfloop transitions, 141 changer transitions 0/259 dead transitions. [2024-06-27 19:32:33,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 259 transitions, 3370 flow [2024-06-27 19:32:33,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:32:33,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:32:33,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-27 19:32:33,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-27 19:32:33,031 INFO L175 Difference]: Start difference. First operand has 187 places, 232 transitions, 2700 flow. Second operand 10 states and 225 transitions. [2024-06-27 19:32:33,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 259 transitions, 3370 flow [2024-06-27 19:32:33,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 259 transitions, 3016 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:33,252 INFO L231 Difference]: Finished difference. Result has 191 places, 232 transitions, 2636 flow [2024-06-27 19:32:33,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2348, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2636, PETRI_PLACES=191, PETRI_TRANSITIONS=232} [2024-06-27 19:32:33,252 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 151 predicate places. [2024-06-27 19:32:33,252 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 232 transitions, 2636 flow [2024-06-27 19:32:33,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:33,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:33,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:33,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:32:33,253 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)] === [2024-06-27 19:32:33,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:33,253 INFO L85 PathProgramCache]: Analyzing trace with hash 82062438, now seen corresponding path program 1 times [2024-06-27 19:32:33,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:33,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859527229] [2024-06-27 19:32:33,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:33,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:33,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:33,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859527229] [2024-06-27 19:32:33,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859527229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:33,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:33,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:33,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143241923] [2024-06-27 19:32:33,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:33,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:33,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:33,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:33,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:33,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:33,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 232 transitions, 2636 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:33,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:33,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:33,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:33,717 INFO L124 PetriNetUnfolderBase]: 1614/2744 cut-off events. [2024-06-27 19:32:33,717 INFO L125 PetriNetUnfolderBase]: For 165366/165366 co-relation queries the response was YES. [2024-06-27 19:32:33,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16826 conditions, 2744 events. 1614/2744 cut-off events. For 165366/165366 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 16174 event pairs, 333 based on Foata normal form. 30/2772 useless extension candidates. Maximal degree in co-relation 16741. Up to 1310 conditions per place. [2024-06-27 19:32:33,737 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 119 selfloop transitions, 146 changer transitions 7/279 dead transitions. [2024-06-27 19:32:33,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 279 transitions, 3594 flow [2024-06-27 19:32:33,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:33,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:33,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:32:33,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2024-06-27 19:32:33,738 INFO L175 Difference]: Start difference. First operand has 191 places, 232 transitions, 2636 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:32:33,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 279 transitions, 3594 flow [2024-06-27 19:32:33,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 279 transitions, 3304 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 19:32:33,989 INFO L231 Difference]: Finished difference. Result has 190 places, 233 transitions, 2674 flow [2024-06-27 19:32:33,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2346, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2674, PETRI_PLACES=190, PETRI_TRANSITIONS=233} [2024-06-27 19:32:33,990 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 150 predicate places. [2024-06-27 19:32:33,990 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 233 transitions, 2674 flow [2024-06-27 19:32:33,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:33,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:33,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:33,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:32:33,990 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)] === [2024-06-27 19:32:33,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:33,990 INFO L85 PathProgramCache]: Analyzing trace with hash 318237798, now seen corresponding path program 2 times [2024-06-27 19:32:33,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:33,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978795037] [2024-06-27 19:32:33,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:33,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:34,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:34,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978795037] [2024-06-27 19:32:34,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978795037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:34,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:34,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:34,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921379054] [2024-06-27 19:32:34,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:34,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:34,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:34,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:34,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:34,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:34,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 233 transitions, 2674 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:34,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:34,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:34,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:34,459 INFO L124 PetriNetUnfolderBase]: 1825/3095 cut-off events. [2024-06-27 19:32:34,459 INFO L125 PetriNetUnfolderBase]: For 219924/219924 co-relation queries the response was YES. [2024-06-27 19:32:34,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20212 conditions, 3095 events. 1825/3095 cut-off events. For 219924/219924 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18632 event pairs, 529 based on Foata normal form. 30/3123 useless extension candidates. Maximal degree in co-relation 20126. Up to 2108 conditions per place. [2024-06-27 19:32:34,482 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 121 selfloop transitions, 141 changer transitions 4/273 dead transitions. [2024-06-27 19:32:34,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 273 transitions, 3598 flow [2024-06-27 19:32:34,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:34,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:34,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 19:32:34,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378205128205128 [2024-06-27 19:32:34,484 INFO L175 Difference]: Start difference. First operand has 190 places, 233 transitions, 2674 flow. Second operand 8 states and 199 transitions. [2024-06-27 19:32:34,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 273 transitions, 3598 flow [2024-06-27 19:32:34,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 273 transitions, 3399 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:34,862 INFO L231 Difference]: Finished difference. Result has 194 places, 234 transitions, 2809 flow [2024-06-27 19:32:34,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2809, PETRI_PLACES=194, PETRI_TRANSITIONS=234} [2024-06-27 19:32:34,863 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 154 predicate places. [2024-06-27 19:32:34,863 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 234 transitions, 2809 flow [2024-06-27 19:32:34,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:34,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:34,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:34,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:32:34,863 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)] === [2024-06-27 19:32:34,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:34,863 INFO L85 PathProgramCache]: Analyzing trace with hash 318534468, now seen corresponding path program 3 times [2024-06-27 19:32:34,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:34,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365291211] [2024-06-27 19:32:34,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:34,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:34,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:34,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365291211] [2024-06-27 19:32:34,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365291211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:34,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:34,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:34,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027226983] [2024-06-27 19:32:34,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:34,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:34,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:34,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:34,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:34,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:34,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 234 transitions, 2809 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:34,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:34,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:34,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:35,358 INFO L124 PetriNetUnfolderBase]: 1726/2938 cut-off events. [2024-06-27 19:32:35,358 INFO L125 PetriNetUnfolderBase]: For 187533/187533 co-relation queries the response was YES. [2024-06-27 19:32:35,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18224 conditions, 2938 events. 1726/2938 cut-off events. For 187533/187533 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17558 event pairs, 524 based on Foata normal form. 34/2970 useless extension candidates. Maximal degree in co-relation 18136. Up to 2248 conditions per place. [2024-06-27 19:32:35,376 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 117 selfloop transitions, 136 changer transitions 5/265 dead transitions. [2024-06-27 19:32:35,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 265 transitions, 3525 flow [2024-06-27 19:32:35,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:35,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:35,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:32:35,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-27 19:32:35,377 INFO L175 Difference]: Start difference. First operand has 194 places, 234 transitions, 2809 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:32:35,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 265 transitions, 3525 flow [2024-06-27 19:32:35,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 265 transitions, 3314 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:35,648 INFO L231 Difference]: Finished difference. Result has 198 places, 231 transitions, 2825 flow [2024-06-27 19:32:35,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2598, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2825, PETRI_PLACES=198, PETRI_TRANSITIONS=231} [2024-06-27 19:32:35,648 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 158 predicate places. [2024-06-27 19:32:35,649 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 231 transitions, 2825 flow [2024-06-27 19:32:35,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:35,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:35,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:35,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:32:35,649 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)] === [2024-06-27 19:32:35,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:35,650 INFO L85 PathProgramCache]: Analyzing trace with hash -544740020, now seen corresponding path program 1 times [2024-06-27 19:32:35,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:35,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91385742] [2024-06-27 19:32:35,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:35,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:35,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:35,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91385742] [2024-06-27 19:32:35,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91385742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:35,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:35,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:35,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595906917] [2024-06-27 19:32:35,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:35,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:35,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:35,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:35,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:35,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:35,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 231 transitions, 2825 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:35,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:35,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:35,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:36,047 INFO L124 PetriNetUnfolderBase]: 1544/2579 cut-off events. [2024-06-27 19:32:36,047 INFO L125 PetriNetUnfolderBase]: For 171181/171181 co-relation queries the response was YES. [2024-06-27 19:32:36,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17674 conditions, 2579 events. 1544/2579 cut-off events. For 171181/171181 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14876 event pairs, 376 based on Foata normal form. 10/2583 useless extension candidates. Maximal degree in co-relation 17584. Up to 2016 conditions per place. [2024-06-27 19:32:36,068 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 191 selfloop transitions, 69 changer transitions 0/267 dead transitions. [2024-06-27 19:32:36,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 267 transitions, 3607 flow [2024-06-27 19:32:36,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:36,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:36,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:32:36,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6336996336996337 [2024-06-27 19:32:36,069 INFO L175 Difference]: Start difference. First operand has 198 places, 231 transitions, 2825 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:32:36,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 267 transitions, 3607 flow [2024-06-27 19:32:36,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 267 transitions, 3312 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:36,312 INFO L231 Difference]: Finished difference. Result has 198 places, 235 transitions, 2729 flow [2024-06-27 19:32:36,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2530, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2729, PETRI_PLACES=198, PETRI_TRANSITIONS=235} [2024-06-27 19:32:36,313 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 158 predicate places. [2024-06-27 19:32:36,313 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 235 transitions, 2729 flow [2024-06-27 19:32:36,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:36,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:36,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:36,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:32:36,313 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)] === [2024-06-27 19:32:36,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:36,314 INFO L85 PathProgramCache]: Analyzing trace with hash -541883060, now seen corresponding path program 2 times [2024-06-27 19:32:36,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:36,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103275524] [2024-06-27 19:32:36,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:36,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:36,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:36,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103275524] [2024-06-27 19:32:36,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103275524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:36,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:36,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:36,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929293159] [2024-06-27 19:32:36,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:36,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:36,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:36,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:36,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:36,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:36,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 235 transitions, 2729 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:36,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:36,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:36,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:36,720 INFO L124 PetriNetUnfolderBase]: 1580/2640 cut-off events. [2024-06-27 19:32:36,720 INFO L125 PetriNetUnfolderBase]: For 177333/177333 co-relation queries the response was YES. [2024-06-27 19:32:36,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17939 conditions, 2640 events. 1580/2640 cut-off events. For 177333/177333 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 15243 event pairs, 405 based on Foata normal form. 10/2648 useless extension candidates. Maximal degree in co-relation 17848. Up to 2271 conditions per place. [2024-06-27 19:32:36,741 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 188 selfloop transitions, 66 changer transitions 0/261 dead transitions. [2024-06-27 19:32:36,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 261 transitions, 3339 flow [2024-06-27 19:32:36,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:36,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:36,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:32:36,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608058608058608 [2024-06-27 19:32:36,742 INFO L175 Difference]: Start difference. First operand has 198 places, 235 transitions, 2729 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:32:36,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 261 transitions, 3339 flow [2024-06-27 19:32:37,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 261 transitions, 3229 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:37,090 INFO L231 Difference]: Finished difference. Result has 202 places, 237 transitions, 2791 flow [2024-06-27 19:32:37,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2625, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2791, PETRI_PLACES=202, PETRI_TRANSITIONS=237} [2024-06-27 19:32:37,091 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 162 predicate places. [2024-06-27 19:32:37,091 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 237 transitions, 2791 flow [2024-06-27 19:32:37,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:37,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:37,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:37,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:32:37,092 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)] === [2024-06-27 19:32:37,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:37,092 INFO L85 PathProgramCache]: Analyzing trace with hash -56548510, now seen corresponding path program 3 times [2024-06-27 19:32:37,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:37,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860544740] [2024-06-27 19:32:37,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:37,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:37,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:37,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860544740] [2024-06-27 19:32:37,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860544740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:37,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:37,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:37,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068629353] [2024-06-27 19:32:37,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:37,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:37,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:37,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:37,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:37,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:37,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 237 transitions, 2791 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:37,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:37,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:37,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:37,505 INFO L124 PetriNetUnfolderBase]: 1593/2662 cut-off events. [2024-06-27 19:32:37,505 INFO L125 PetriNetUnfolderBase]: For 171076/171076 co-relation queries the response was YES. [2024-06-27 19:32:37,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18323 conditions, 2662 events. 1593/2662 cut-off events. For 171076/171076 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 15419 event pairs, 405 based on Foata normal form. 1/2661 useless extension candidates. Maximal degree in co-relation 18230. Up to 2186 conditions per place. [2024-06-27 19:32:37,528 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 127 selfloop transitions, 134 changer transitions 0/268 dead transitions. [2024-06-27 19:32:37,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 268 transitions, 3661 flow [2024-06-27 19:32:37,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:32:37,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:32:37,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-27 19:32:37,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5717948717948718 [2024-06-27 19:32:37,529 INFO L175 Difference]: Start difference. First operand has 202 places, 237 transitions, 2791 flow. Second operand 10 states and 223 transitions. [2024-06-27 19:32:37,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 268 transitions, 3661 flow [2024-06-27 19:32:37,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 268 transitions, 3519 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:37,887 INFO L231 Difference]: Finished difference. Result has 207 places, 243 transitions, 2991 flow [2024-06-27 19:32:37,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2649, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2991, PETRI_PLACES=207, PETRI_TRANSITIONS=243} [2024-06-27 19:32:37,888 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 167 predicate places. [2024-06-27 19:32:37,888 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 243 transitions, 2991 flow [2024-06-27 19:32:37,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:37,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:37,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:37,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:32:37,888 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)] === [2024-06-27 19:32:37,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:37,888 INFO L85 PathProgramCache]: Analyzing trace with hash -853607114, now seen corresponding path program 4 times [2024-06-27 19:32:37,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:37,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291282102] [2024-06-27 19:32:37,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:37,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:37,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:37,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291282102] [2024-06-27 19:32:37,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291282102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:37,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:37,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:37,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764997729] [2024-06-27 19:32:37,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:37,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:37,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:37,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:37,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:37,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:37,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 243 transitions, 2991 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:37,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:37,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:37,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:38,298 INFO L124 PetriNetUnfolderBase]: 1590/2662 cut-off events. [2024-06-27 19:32:38,298 INFO L125 PetriNetUnfolderBase]: For 175487/175487 co-relation queries the response was YES. [2024-06-27 19:32:38,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18490 conditions, 2662 events. 1590/2662 cut-off events. For 175487/175487 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 15433 event pairs, 407 based on Foata normal form. 1/2661 useless extension candidates. Maximal degree in co-relation 18396. Up to 2183 conditions per place. [2024-06-27 19:32:38,320 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 125 selfloop transitions, 133 changer transitions 0/265 dead transitions. [2024-06-27 19:32:38,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 265 transitions, 3673 flow [2024-06-27 19:32:38,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:38,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:38,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 19:32:38,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993589743589743 [2024-06-27 19:32:38,323 INFO L175 Difference]: Start difference. First operand has 207 places, 243 transitions, 2991 flow. Second operand 8 states and 187 transitions. [2024-06-27 19:32:38,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 265 transitions, 3673 flow [2024-06-27 19:32:38,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 265 transitions, 3459 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:38,609 INFO L231 Difference]: Finished difference. Result has 209 places, 243 transitions, 3049 flow [2024-06-27 19:32:38,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2777, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3049, PETRI_PLACES=209, PETRI_TRANSITIONS=243} [2024-06-27 19:32:38,611 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 169 predicate places. [2024-06-27 19:32:38,611 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 243 transitions, 3049 flow [2024-06-27 19:32:38,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:38,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:38,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:38,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:32:38,611 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)] === [2024-06-27 19:32:38,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:38,612 INFO L85 PathProgramCache]: Analyzing trace with hash -260952756, now seen corresponding path program 3 times [2024-06-27 19:32:38,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:38,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841614420] [2024-06-27 19:32:38,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:38,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:38,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:38,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841614420] [2024-06-27 19:32:38,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841614420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:38,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:38,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:38,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143505187] [2024-06-27 19:32:38,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:38,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:38,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:38,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:38,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:38,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:38,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 243 transitions, 3049 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:38,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:38,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:38,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:39,136 INFO L124 PetriNetUnfolderBase]: 1626/2721 cut-off events. [2024-06-27 19:32:39,136 INFO L125 PetriNetUnfolderBase]: For 196885/196885 co-relation queries the response was YES. [2024-06-27 19:32:39,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18846 conditions, 2721 events. 1626/2721 cut-off events. For 196885/196885 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 15812 event pairs, 402 based on Foata normal form. 10/2730 useless extension candidates. Maximal degree in co-relation 18751. Up to 2442 conditions per place. [2024-06-27 19:32:39,161 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 235 selfloop transitions, 25 changer transitions 0/267 dead transitions. [2024-06-27 19:32:39,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 267 transitions, 3663 flow [2024-06-27 19:32:39,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-27 19:32:39,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673076923076923 [2024-06-27 19:32:39,162 INFO L175 Difference]: Start difference. First operand has 209 places, 243 transitions, 3049 flow. Second operand 8 states and 177 transitions. [2024-06-27 19:32:39,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 267 transitions, 3663 flow [2024-06-27 19:32:39,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 267 transitions, 3397 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:39,635 INFO L231 Difference]: Finished difference. Result has 210 places, 245 transitions, 2871 flow [2024-06-27 19:32:39,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2783, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2871, PETRI_PLACES=210, PETRI_TRANSITIONS=245} [2024-06-27 19:32:39,635 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 170 predicate places. [2024-06-27 19:32:39,636 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 245 transitions, 2871 flow [2024-06-27 19:32:39,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:39,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:39,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:39,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:32:39,636 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)] === [2024-06-27 19:32:39,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:39,637 INFO L85 PathProgramCache]: Analyzing trace with hash -809894966, now seen corresponding path program 4 times [2024-06-27 19:32:39,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:39,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674157496] [2024-06-27 19:32:39,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:39,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:39,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:39,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:39,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674157496] [2024-06-27 19:32:39,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674157496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:39,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:39,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:39,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934004218] [2024-06-27 19:32:39,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:39,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:39,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:39,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:39,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:39,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:39,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 245 transitions, 2871 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:39,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:39,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:39,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:40,127 INFO L124 PetriNetUnfolderBase]: 1730/2893 cut-off events. [2024-06-27 19:32:40,127 INFO L125 PetriNetUnfolderBase]: For 245301/245301 co-relation queries the response was YES. [2024-06-27 19:32:40,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19515 conditions, 2893 events. 1730/2893 cut-off events. For 245301/245301 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 17000 event pairs, 443 based on Foata normal form. 34/2926 useless extension candidates. Maximal degree in co-relation 19419. Up to 2446 conditions per place. [2024-06-27 19:32:40,159 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 214 selfloop transitions, 47 changer transitions 3/271 dead transitions. [2024-06-27 19:32:40,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 271 transitions, 3509 flow [2024-06-27 19:32:40,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:32:40,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:32:40,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-27 19:32:40,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5754985754985755 [2024-06-27 19:32:40,160 INFO L175 Difference]: Start difference. First operand has 210 places, 245 transitions, 2871 flow. Second operand 9 states and 202 transitions. [2024-06-27 19:32:40,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 271 transitions, 3509 flow [2024-06-27 19:32:40,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 271 transitions, 3445 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:40,582 INFO L231 Difference]: Finished difference. Result has 213 places, 245 transitions, 2926 flow [2024-06-27 19:32:40,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2926, PETRI_PLACES=213, PETRI_TRANSITIONS=245} [2024-06-27 19:32:40,583 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 173 predicate places. [2024-06-27 19:32:40,583 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 245 transitions, 2926 flow [2024-06-27 19:32:40,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:40,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:40,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:40,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:32:40,584 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)] === [2024-06-27 19:32:40,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:40,584 INFO L85 PathProgramCache]: Analyzing trace with hash -800063936, now seen corresponding path program 5 times [2024-06-27 19:32:40,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:40,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137817348] [2024-06-27 19:32:40,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:40,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:40,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:40,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137817348] [2024-06-27 19:32:40,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137817348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:40,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:40,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:40,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223803755] [2024-06-27 19:32:40,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:40,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:40,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:40,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:40,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:40,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:40,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 245 transitions, 2926 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:40,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:40,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:40,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:41,170 INFO L124 PetriNetUnfolderBase]: 1824/3055 cut-off events. [2024-06-27 19:32:41,171 INFO L125 PetriNetUnfolderBase]: For 255511/255511 co-relation queries the response was YES. [2024-06-27 19:32:41,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20389 conditions, 3055 events. 1824/3055 cut-off events. For 255511/255511 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 18275 event pairs, 485 based on Foata normal form. 34/3088 useless extension candidates. Maximal degree in co-relation 20292. Up to 2604 conditions per place. [2024-06-27 19:32:41,191 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 217 selfloop transitions, 43 changer transitions 5/272 dead transitions. [2024-06-27 19:32:41,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 272 transitions, 3570 flow [2024-06-27 19:32:41,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:32:41,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:32:41,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-27 19:32:41,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615384615384615 [2024-06-27 19:32:41,192 INFO L175 Difference]: Start difference. First operand has 213 places, 245 transitions, 2926 flow. Second operand 10 states and 219 transitions. [2024-06-27 19:32:41,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 272 transitions, 3570 flow [2024-06-27 19:32:41,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 272 transitions, 3461 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:41,602 INFO L231 Difference]: Finished difference. Result has 216 places, 243 transitions, 2906 flow [2024-06-27 19:32:41,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2817, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2906, PETRI_PLACES=216, PETRI_TRANSITIONS=243} [2024-06-27 19:32:41,603 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 176 predicate places. [2024-06-27 19:32:41,603 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 243 transitions, 2906 flow [2024-06-27 19:32:41,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:41,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:41,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:41,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:32:41,603 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)] === [2024-06-27 19:32:41,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:41,603 INFO L85 PathProgramCache]: Analyzing trace with hash -810191636, now seen corresponding path program 6 times [2024-06-27 19:32:41,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:41,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142536641] [2024-06-27 19:32:41,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:41,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:41,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:41,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142536641] [2024-06-27 19:32:41,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142536641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:41,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:41,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:41,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388758539] [2024-06-27 19:32:41,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:41,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:41,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:41,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:41,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:41,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:41,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 243 transitions, 2906 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:41,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:41,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:41,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:42,159 INFO L124 PetriNetUnfolderBase]: 1827/3078 cut-off events. [2024-06-27 19:32:42,160 INFO L125 PetriNetUnfolderBase]: For 256033/256033 co-relation queries the response was YES. [2024-06-27 19:32:42,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20535 conditions, 3078 events. 1827/3078 cut-off events. For 256033/256033 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 18473 event pairs, 447 based on Foata normal form. 30/3107 useless extension candidates. Maximal degree in co-relation 20437. Up to 2406 conditions per place. [2024-06-27 19:32:42,186 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 216 selfloop transitions, 45 changer transitions 7/275 dead transitions. [2024-06-27 19:32:42,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 275 transitions, 3590 flow [2024-06-27 19:32:42,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:32:42,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:32:42,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-27 19:32:42,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5868945868945868 [2024-06-27 19:32:42,187 INFO L175 Difference]: Start difference. First operand has 216 places, 243 transitions, 2906 flow. Second operand 9 states and 206 transitions. [2024-06-27 19:32:42,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 275 transitions, 3590 flow [2024-06-27 19:32:42,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 275 transitions, 3487 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 19:32:42,666 INFO L231 Difference]: Finished difference. Result has 217 places, 242 transitions, 2901 flow [2024-06-27 19:32:42,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2803, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2901, PETRI_PLACES=217, PETRI_TRANSITIONS=242} [2024-06-27 19:32:42,666 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 177 predicate places. [2024-06-27 19:32:42,666 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 242 transitions, 2901 flow [2024-06-27 19:32:42,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:42,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:42,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:42,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:32:42,667 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)] === [2024-06-27 19:32:42,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:42,667 INFO L85 PathProgramCache]: Analyzing trace with hash -799694974, now seen corresponding path program 1 times [2024-06-27 19:32:42,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:42,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056472176] [2024-06-27 19:32:42,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:42,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:42,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:42,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056472176] [2024-06-27 19:32:42,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056472176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:42,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:42,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:42,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031374213] [2024-06-27 19:32:42,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:42,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:42,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:42,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:42,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:42,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:42,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 242 transitions, 2901 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:42,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:42,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:42,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:43,229 INFO L124 PetriNetUnfolderBase]: 1936/3269 cut-off events. [2024-06-27 19:32:43,229 INFO L125 PetriNetUnfolderBase]: For 326766/326766 co-relation queries the response was YES. [2024-06-27 19:32:43,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23433 conditions, 3269 events. 1936/3269 cut-off events. For 326766/326766 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19996 event pairs, 512 based on Foata normal form. 30/3298 useless extension candidates. Maximal degree in co-relation 23334. Up to 2370 conditions per place. [2024-06-27 19:32:43,257 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 227 selfloop transitions, 43 changer transitions 0/277 dead transitions. [2024-06-27 19:32:43,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 277 transitions, 3731 flow [2024-06-27 19:32:43,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:32:43,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:32:43,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-27 19:32:43,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5692307692307692 [2024-06-27 19:32:43,258 INFO L175 Difference]: Start difference. First operand has 217 places, 242 transitions, 2901 flow. Second operand 10 states and 222 transitions. [2024-06-27 19:32:43,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 277 transitions, 3731 flow [2024-06-27 19:32:43,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 277 transitions, 3613 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:43,785 INFO L231 Difference]: Finished difference. Result has 221 places, 244 transitions, 2942 flow [2024-06-27 19:32:43,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2783, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2942, PETRI_PLACES=221, PETRI_TRANSITIONS=244} [2024-06-27 19:32:43,786 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 181 predicate places. [2024-06-27 19:32:43,786 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 244 transitions, 2942 flow [2024-06-27 19:32:43,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:43,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:43,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:43,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:32:43,786 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)] === [2024-06-27 19:32:43,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:43,787 INFO L85 PathProgramCache]: Analyzing trace with hash -2134434484, now seen corresponding path program 4 times [2024-06-27 19:32:43,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:43,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671005582] [2024-06-27 19:32:43,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:43,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:43,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:43,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671005582] [2024-06-27 19:32:43,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671005582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:43,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:43,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:43,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938319188] [2024-06-27 19:32:43,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:43,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:43,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:43,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:43,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:43,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:43,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 244 transitions, 2942 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:43,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:43,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:43,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:44,299 INFO L124 PetriNetUnfolderBase]: 1957/3292 cut-off events. [2024-06-27 19:32:44,299 INFO L125 PetriNetUnfolderBase]: For 290785/290789 co-relation queries the response was YES. [2024-06-27 19:32:44,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23816 conditions, 3292 events. 1957/3292 cut-off events. For 290785/290789 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20191 event pairs, 603 based on Foata normal form. 3/3293 useless extension candidates. Maximal degree in co-relation 23715. Up to 2892 conditions per place. [2024-06-27 19:32:44,326 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 194 selfloop transitions, 70 changer transitions 0/271 dead transitions. [2024-06-27 19:32:44,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 271 transitions, 3714 flow [2024-06-27 19:32:44,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 19:32:44,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6043956043956044 [2024-06-27 19:32:44,327 INFO L175 Difference]: Start difference. First operand has 221 places, 244 transitions, 2942 flow. Second operand 7 states and 165 transitions. [2024-06-27 19:32:44,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 271 transitions, 3714 flow [2024-06-27 19:32:44,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 271 transitions, 3623 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:44,896 INFO L231 Difference]: Finished difference. Result has 221 places, 248 transitions, 3064 flow [2024-06-27 19:32:44,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2851, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3064, PETRI_PLACES=221, PETRI_TRANSITIONS=248} [2024-06-27 19:32:44,897 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 181 predicate places. [2024-06-27 19:32:44,897 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 248 transitions, 3064 flow [2024-06-27 19:32:44,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:44,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:44,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:44,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:32:44,897 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)] === [2024-06-27 19:32:44,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:44,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1801061228, now seen corresponding path program 5 times [2024-06-27 19:32:44,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:44,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886203301] [2024-06-27 19:32:44,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:44,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:44,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:44,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:44,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886203301] [2024-06-27 19:32:44,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886203301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:44,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:44,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:44,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986815737] [2024-06-27 19:32:44,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:44,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:44,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:44,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:44,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:44,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:44,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 248 transitions, 3064 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:44,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:44,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:44,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:45,394 INFO L124 PetriNetUnfolderBase]: 1965/3304 cut-off events. [2024-06-27 19:32:45,395 INFO L125 PetriNetUnfolderBase]: For 299278/299282 co-relation queries the response was YES. [2024-06-27 19:32:45,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24101 conditions, 3304 events. 1965/3304 cut-off events. For 299278/299282 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 20278 event pairs, 605 based on Foata normal form. 3/3305 useless extension candidates. Maximal degree in co-relation 23999. Up to 2937 conditions per place. [2024-06-27 19:32:45,423 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 194 selfloop transitions, 67 changer transitions 0/268 dead transitions. [2024-06-27 19:32:45,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 268 transitions, 3666 flow [2024-06-27 19:32:45,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:45,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:45,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 19:32:45,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860805860805861 [2024-06-27 19:32:45,424 INFO L175 Difference]: Start difference. First operand has 221 places, 248 transitions, 3064 flow. Second operand 7 states and 160 transitions. [2024-06-27 19:32:45,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 268 transitions, 3666 flow [2024-06-27 19:32:46,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 268 transitions, 3529 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:46,245 INFO L231 Difference]: Finished difference. Result has 225 places, 250 transitions, 3106 flow [2024-06-27 19:32:46,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2941, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3106, PETRI_PLACES=225, PETRI_TRANSITIONS=250} [2024-06-27 19:32:46,246 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 185 predicate places. [2024-06-27 19:32:46,246 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 250 transitions, 3106 flow [2024-06-27 19:32:46,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:46,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:46,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:46,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:32:46,247 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)] === [2024-06-27 19:32:46,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:46,247 INFO L85 PathProgramCache]: Analyzing trace with hash -367455158, now seen corresponding path program 5 times [2024-06-27 19:32:46,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:46,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229424] [2024-06-27 19:32:46,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:46,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:46,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:46,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:46,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229424] [2024-06-27 19:32:46,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:46,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:46,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:46,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557293856] [2024-06-27 19:32:46,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:46,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:46,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:46,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:46,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:46,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:46,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 250 transitions, 3106 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:46,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:46,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:46,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:46,754 INFO L124 PetriNetUnfolderBase]: 1978/3325 cut-off events. [2024-06-27 19:32:46,754 INFO L125 PetriNetUnfolderBase]: For 307808/307812 co-relation queries the response was YES. [2024-06-27 19:32:46,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24465 conditions, 3325 events. 1978/3325 cut-off events. For 307808/307812 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20400 event pairs, 620 based on Foata normal form. 2/3325 useless extension candidates. Maximal degree in co-relation 24361. Up to 2826 conditions per place. [2024-06-27 19:32:46,781 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 128 selfloop transitions, 141 changer transitions 0/276 dead transitions. [2024-06-27 19:32:46,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 276 transitions, 4022 flow [2024-06-27 19:32:46,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:46,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:46,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 19:32:46,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592948717948718 [2024-06-27 19:32:46,782 INFO L175 Difference]: Start difference. First operand has 225 places, 250 transitions, 3106 flow. Second operand 8 states and 185 transitions. [2024-06-27 19:32:46,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 276 transitions, 4022 flow [2024-06-27 19:32:47,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 276 transitions, 3877 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:47,347 INFO L231 Difference]: Finished difference. Result has 228 places, 256 transitions, 3323 flow [2024-06-27 19:32:47,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2961, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3323, PETRI_PLACES=228, PETRI_TRANSITIONS=256} [2024-06-27 19:32:47,348 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 188 predicate places. [2024-06-27 19:32:47,348 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 256 transitions, 3323 flow [2024-06-27 19:32:47,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:47,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:47,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:47,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:32:47,348 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)] === [2024-06-27 19:32:47,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:47,348 INFO L85 PathProgramCache]: Analyzing trace with hash 902153710, now seen corresponding path program 6 times [2024-06-27 19:32:47,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:47,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617896823] [2024-06-27 19:32:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:47,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:47,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:47,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617896823] [2024-06-27 19:32:47,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617896823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:47,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:47,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:47,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287887616] [2024-06-27 19:32:47,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:47,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:47,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:47,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:47,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:47,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:47,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 256 transitions, 3323 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:47,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:47,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:47,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:47,932 INFO L124 PetriNetUnfolderBase]: 1986/3352 cut-off events. [2024-06-27 19:32:47,932 INFO L125 PetriNetUnfolderBase]: For 318850/318854 co-relation queries the response was YES. [2024-06-27 19:32:47,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24867 conditions, 3352 events. 1986/3352 cut-off events. For 318850/318854 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20675 event pairs, 542 based on Foata normal form. 3/3353 useless extension candidates. Maximal degree in co-relation 24762. Up to 2541 conditions per place. [2024-06-27 19:32:47,956 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 197 selfloop transitions, 88 changer transitions 0/292 dead transitions. [2024-06-27 19:32:47,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 292 transitions, 4341 flow [2024-06-27 19:32:47,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:47,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:47,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:32:47,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6227106227106227 [2024-06-27 19:32:47,957 INFO L175 Difference]: Start difference. First operand has 228 places, 256 transitions, 3323 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:32:47,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 292 transitions, 4341 flow [2024-06-27 19:32:48,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 292 transitions, 4114 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:48,478 INFO L231 Difference]: Finished difference. Result has 232 places, 264 transitions, 3433 flow [2024-06-27 19:32:48,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3096, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3433, PETRI_PLACES=232, PETRI_TRANSITIONS=264} [2024-06-27 19:32:48,479 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 192 predicate places. [2024-06-27 19:32:48,479 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 264 transitions, 3433 flow [2024-06-27 19:32:48,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:48,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:48,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:48,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:32:48,480 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)] === [2024-06-27 19:32:48,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:48,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1801056640, now seen corresponding path program 6 times [2024-06-27 19:32:48,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:48,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703213823] [2024-06-27 19:32:48,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:48,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:48,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:48,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703213823] [2024-06-27 19:32:48,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703213823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:48,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:48,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:48,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789224802] [2024-06-27 19:32:48,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:48,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:48,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:48,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:48,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:48,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:48,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 264 transitions, 3433 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:48,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:48,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:48,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:49,118 INFO L124 PetriNetUnfolderBase]: 1983/3333 cut-off events. [2024-06-27 19:32:49,119 INFO L125 PetriNetUnfolderBase]: For 325954/325958 co-relation queries the response was YES. [2024-06-27 19:32:49,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25225 conditions, 3333 events. 1983/3333 cut-off events. For 325954/325958 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20471 event pairs, 622 based on Foata normal form. 2/3333 useless extension candidates. Maximal degree in co-relation 25117. Up to 2835 conditions per place. [2024-06-27 19:32:49,149 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 136 selfloop transitions, 142 changer transitions 0/285 dead transitions. [2024-06-27 19:32:49,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 285 transitions, 4171 flow [2024-06-27 19:32:49,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:32:49,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:32:49,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-27 19:32:49,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.558974358974359 [2024-06-27 19:32:49,150 INFO L175 Difference]: Start difference. First operand has 232 places, 264 transitions, 3433 flow. Second operand 10 states and 218 transitions. [2024-06-27 19:32:49,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 285 transitions, 4171 flow [2024-06-27 19:32:50,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 285 transitions, 4032 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:50,034 INFO L231 Difference]: Finished difference. Result has 240 places, 264 transitions, 3584 flow [2024-06-27 19:32:50,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3294, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3584, PETRI_PLACES=240, PETRI_TRANSITIONS=264} [2024-06-27 19:32:50,034 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 200 predicate places. [2024-06-27 19:32:50,034 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 264 transitions, 3584 flow [2024-06-27 19:32:50,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:50,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:50,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:50,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:32:50,034 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)] === [2024-06-27 19:32:50,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:50,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1233026196, now seen corresponding path program 7 times [2024-06-27 19:32:50,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:50,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613696809] [2024-06-27 19:32:50,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:50,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:50,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:50,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613696809] [2024-06-27 19:32:50,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613696809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:50,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:50,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:50,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802948846] [2024-06-27 19:32:50,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:50,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:50,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:50,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:50,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:50,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:50,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 264 transitions, 3584 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:50,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:50,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:50,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:50,615 INFO L124 PetriNetUnfolderBase]: 1991/3360 cut-off events. [2024-06-27 19:32:50,616 INFO L125 PetriNetUnfolderBase]: For 335954/335958 co-relation queries the response was YES. [2024-06-27 19:32:50,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25530 conditions, 3360 events. 1991/3360 cut-off events. For 335954/335958 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20728 event pairs, 528 based on Foata normal form. 3/3361 useless extension candidates. Maximal degree in co-relation 25420. Up to 2545 conditions per place. [2024-06-27 19:32:50,646 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 196 selfloop transitions, 91 changer transitions 0/294 dead transitions. [2024-06-27 19:32:50,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 294 transitions, 4415 flow [2024-06-27 19:32:50,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:50,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:50,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 19:32:50,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 19:32:50,647 INFO L175 Difference]: Start difference. First operand has 240 places, 264 transitions, 3584 flow. Second operand 7 states and 169 transitions. [2024-06-27 19:32:50,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 294 transitions, 4415 flow [2024-06-27 19:32:51,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 294 transitions, 4123 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 19:32:51,298 INFO L231 Difference]: Finished difference. Result has 238 places, 267 transitions, 3512 flow [2024-06-27 19:32:51,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3292, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3512, PETRI_PLACES=238, PETRI_TRANSITIONS=267} [2024-06-27 19:32:51,298 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 198 predicate places. [2024-06-27 19:32:51,298 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 267 transitions, 3512 flow [2024-06-27 19:32:51,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:51,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:51,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:51,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:32:51,299 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)] === [2024-06-27 19:32:51,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:51,299 INFO L85 PathProgramCache]: Analyzing trace with hash 39428216, now seen corresponding path program 8 times [2024-06-27 19:32:51,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:51,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515674091] [2024-06-27 19:32:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:51,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:51,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:51,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515674091] [2024-06-27 19:32:51,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515674091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:51,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:51,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:51,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105714034] [2024-06-27 19:32:51,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:51,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:51,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:51,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:51,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:51,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:51,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 267 transitions, 3512 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:51,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:51,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:51,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:51,905 INFO L124 PetriNetUnfolderBase]: 1999/3358 cut-off events. [2024-06-27 19:32:51,905 INFO L125 PetriNetUnfolderBase]: For 346683/346687 co-relation queries the response was YES. [2024-06-27 19:32:51,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25796 conditions, 3358 events. 1999/3358 cut-off events. For 346683/346687 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 20651 event pairs, 609 based on Foata normal form. 3/3359 useless extension candidates. Maximal degree in co-relation 25685. Up to 2987 conditions per place. [2024-06-27 19:32:51,935 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 210 selfloop transitions, 67 changer transitions 0/284 dead transitions. [2024-06-27 19:32:51,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 284 transitions, 4138 flow [2024-06-27 19:32:51,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:51,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:51,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-27 19:32:51,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5787545787545788 [2024-06-27 19:32:51,936 INFO L175 Difference]: Start difference. First operand has 238 places, 267 transitions, 3512 flow. Second operand 7 states and 158 transitions. [2024-06-27 19:32:51,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 284 transitions, 4138 flow [2024-06-27 19:32:52,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 284 transitions, 3990 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:52,623 INFO L231 Difference]: Finished difference. Result has 242 places, 269 transitions, 3543 flow [2024-06-27 19:32:52,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3366, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3543, PETRI_PLACES=242, PETRI_TRANSITIONS=269} [2024-06-27 19:32:52,623 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 202 predicate places. [2024-06-27 19:32:52,623 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 269 transitions, 3543 flow [2024-06-27 19:32:52,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:52,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:52,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:52,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:32:52,624 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)] === [2024-06-27 19:32:52,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:52,624 INFO L85 PathProgramCache]: Analyzing trace with hash 585059378, now seen corresponding path program 9 times [2024-06-27 19:32:52,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:52,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646233111] [2024-06-27 19:32:52,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:52,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:52,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:52,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:52,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646233111] [2024-06-27 19:32:52,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646233111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:52,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:52,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:52,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422498360] [2024-06-27 19:32:52,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:52,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:52,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:52,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:52,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:52,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:52,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 269 transitions, 3543 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:52,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:52,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:52,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:53,160 INFO L124 PetriNetUnfolderBase]: 2007/3368 cut-off events. [2024-06-27 19:32:53,160 INFO L125 PetriNetUnfolderBase]: For 356224/356228 co-relation queries the response was YES. [2024-06-27 19:32:53,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25843 conditions, 3368 events. 2007/3368 cut-off events. For 356224/356228 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20693 event pairs, 607 based on Foata normal form. 3/3367 useless extension candidates. Maximal degree in co-relation 25731. Up to 2941 conditions per place. [2024-06-27 19:32:53,189 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 210 selfloop transitions, 74 changer transitions 0/291 dead transitions. [2024-06-27 19:32:53,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 291 transitions, 4205 flow [2024-06-27 19:32:53,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:53,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:53,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-27 19:32:53,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934065934065934 [2024-06-27 19:32:53,190 INFO L175 Difference]: Start difference. First operand has 242 places, 269 transitions, 3543 flow. Second operand 7 states and 162 transitions. [2024-06-27 19:32:53,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 291 transitions, 4205 flow [2024-06-27 19:32:53,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 291 transitions, 4056 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:53,989 INFO L231 Difference]: Finished difference. Result has 245 places, 272 transitions, 3602 flow [2024-06-27 19:32:53,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3394, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3602, PETRI_PLACES=245, PETRI_TRANSITIONS=272} [2024-06-27 19:32:53,990 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 205 predicate places. [2024-06-27 19:32:53,990 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 272 transitions, 3602 flow [2024-06-27 19:32:53,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:53,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:53,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:53,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:32:53,991 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)] === [2024-06-27 19:32:53,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:53,991 INFO L85 PathProgramCache]: Analyzing trace with hash 39432804, now seen corresponding path program 7 times [2024-06-27 19:32:53,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:53,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582497616] [2024-06-27 19:32:53,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:53,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:54,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:54,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582497616] [2024-06-27 19:32:54,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582497616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:54,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:54,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:54,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725732461] [2024-06-27 19:32:54,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:54,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:54,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:54,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:54,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:54,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:54,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 272 transitions, 3602 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:54,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:54,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:54,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:54,575 INFO L124 PetriNetUnfolderBase]: 2020/3395 cut-off events. [2024-06-27 19:32:54,575 INFO L125 PetriNetUnfolderBase]: For 366392/366396 co-relation queries the response was YES. [2024-06-27 19:32:54,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26268 conditions, 3395 events. 2020/3395 cut-off events. For 366392/366396 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20945 event pairs, 621 based on Foata normal form. 2/3395 useless extension candidates. Maximal degree in co-relation 26154. Up to 2886 conditions per place. [2024-06-27 19:32:54,606 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 144 selfloop transitions, 147 changer transitions 0/298 dead transitions. [2024-06-27 19:32:54,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 298 transitions, 4590 flow [2024-06-27 19:32:54,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:32:54,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:32:54,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-27 19:32:54,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547785547785548 [2024-06-27 19:32:54,607 INFO L175 Difference]: Start difference. First operand has 245 places, 272 transitions, 3602 flow. Second operand 11 states and 238 transitions. [2024-06-27 19:32:54,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 298 transitions, 4590 flow [2024-06-27 19:32:55,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 298 transitions, 4442 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:55,434 INFO L231 Difference]: Finished difference. Result has 252 places, 278 transitions, 3834 flow [2024-06-27 19:32:55,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3454, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3834, PETRI_PLACES=252, PETRI_TRANSITIONS=278} [2024-06-27 19:32:55,434 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 212 predicate places. [2024-06-27 19:32:55,434 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 278 transitions, 3834 flow [2024-06-27 19:32:55,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:55,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:55,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:55,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 19:32:55,435 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)] === [2024-06-27 19:32:55,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:55,435 INFO L85 PathProgramCache]: Analyzing trace with hash 50084390, now seen corresponding path program 8 times [2024-06-27 19:32:55,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:55,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40976020] [2024-06-27 19:32:55,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:55,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:55,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:55,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40976020] [2024-06-27 19:32:55,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40976020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:55,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:55,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:55,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202469430] [2024-06-27 19:32:55,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:55,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:55,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:55,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:55,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:55,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:55,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 278 transitions, 3834 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:55,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:55,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:55,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:56,007 INFO L124 PetriNetUnfolderBase]: 2017/3403 cut-off events. [2024-06-27 19:32:56,007 INFO L125 PetriNetUnfolderBase]: For 373539/373543 co-relation queries the response was YES. [2024-06-27 19:32:56,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26456 conditions, 3403 events. 2017/3403 cut-off events. For 373539/373543 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 21043 event pairs, 631 based on Foata normal form. 2/3403 useless extension candidates. Maximal degree in co-relation 26341. Up to 2883 conditions per place. [2024-06-27 19:32:56,041 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 142 selfloop transitions, 146 changer transitions 0/295 dead transitions. [2024-06-27 19:32:56,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 295 transitions, 4592 flow [2024-06-27 19:32:56,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:32:56,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:32:56,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-27 19:32:56,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5726495726495726 [2024-06-27 19:32:56,042 INFO L175 Difference]: Start difference. First operand has 252 places, 278 transitions, 3834 flow. Second operand 9 states and 201 transitions. [2024-06-27 19:32:56,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 295 transitions, 4592 flow [2024-06-27 19:32:56,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 295 transitions, 3983 flow, removed 21 selfloop flow, removed 11 redundant places. [2024-06-27 19:32:56,770 INFO L231 Difference]: Finished difference. Result has 250 places, 278 transitions, 3523 flow [2024-06-27 19:32:56,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3225, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3523, PETRI_PLACES=250, PETRI_TRANSITIONS=278} [2024-06-27 19:32:56,770 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 210 predicate places. [2024-06-27 19:32:56,770 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 278 transitions, 3523 flow [2024-06-27 19:32:56,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:56,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:56,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:56,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 19:32:56,771 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)] === [2024-06-27 19:32:56,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:56,771 INFO L85 PathProgramCache]: Analyzing trace with hash 585200676, now seen corresponding path program 9 times [2024-06-27 19:32:56,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:56,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324691238] [2024-06-27 19:32:56,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:56,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:56,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:56,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324691238] [2024-06-27 19:32:56,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324691238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:56,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:56,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:56,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597482137] [2024-06-27 19:32:56,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:56,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:56,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:56,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:56,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:56,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:56,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 278 transitions, 3523 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:56,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:56,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:56,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:57,354 INFO L124 PetriNetUnfolderBase]: 2014/3388 cut-off events. [2024-06-27 19:32:57,355 INFO L125 PetriNetUnfolderBase]: For 378828/378828 co-relation queries the response was YES. [2024-06-27 19:32:57,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26175 conditions, 3388 events. 2014/3388 cut-off events. For 378828/378828 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20838 event pairs, 589 based on Foata normal form. 1/3388 useless extension candidates. Maximal degree in co-relation 26061. Up to 3114 conditions per place. [2024-06-27 19:32:57,385 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 258 selfloop transitions, 28 changer transitions 0/293 dead transitions. [2024-06-27 19:32:57,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 293 transitions, 4131 flow [2024-06-27 19:32:57,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:57,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:57,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-27 19:32:57,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5480769230769231 [2024-06-27 19:32:57,386 INFO L175 Difference]: Start difference. First operand has 250 places, 278 transitions, 3523 flow. Second operand 8 states and 171 transitions. [2024-06-27 19:32:57,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 293 transitions, 4131 flow [2024-06-27 19:32:57,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 293 transitions, 3837 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 19:32:57,980 INFO L231 Difference]: Finished difference. Result has 250 places, 278 transitions, 3291 flow [2024-06-27 19:32:57,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3229, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3291, PETRI_PLACES=250, PETRI_TRANSITIONS=278} [2024-06-27 19:32:57,980 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 210 predicate places. [2024-06-27 19:32:57,980 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 278 transitions, 3291 flow [2024-06-27 19:32:57,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:57,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:57,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:57,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 19:32:57,980 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)] === [2024-06-27 19:32:57,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:57,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1978404498, now seen corresponding path program 10 times [2024-06-27 19:32:57,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:57,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454228765] [2024-06-27 19:32:57,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:57,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:58,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:58,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454228765] [2024-06-27 19:32:58,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454228765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:58,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:58,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:58,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342700129] [2024-06-27 19:32:58,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:58,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:58,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:58,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:58,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:58,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:58,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 278 transitions, 3291 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:58,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:58,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:58,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:58,603 INFO L124 PetriNetUnfolderBase]: 2037/3428 cut-off events. [2024-06-27 19:32:58,603 INFO L125 PetriNetUnfolderBase]: For 406518/406518 co-relation queries the response was YES. [2024-06-27 19:32:58,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26038 conditions, 3428 events. 2037/3428 cut-off events. For 406518/406518 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 21236 event pairs, 578 based on Foata normal form. 10/3437 useless extension candidates. Maximal degree in co-relation 25923. Up to 2896 conditions per place. [2024-06-27 19:32:58,633 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 259 selfloop transitions, 50 changer transitions 0/316 dead transitions. [2024-06-27 19:32:58,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 316 transitions, 4029 flow [2024-06-27 19:32:58,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:58,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:58,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:32:58,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314102564102564 [2024-06-27 19:32:58,634 INFO L175 Difference]: Start difference. First operand has 250 places, 278 transitions, 3291 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:32:58,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 316 transitions, 4029 flow [2024-06-27 19:32:59,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 316 transitions, 3965 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:59,613 INFO L231 Difference]: Finished difference. Result has 251 places, 279 transitions, 3357 flow [2024-06-27 19:32:59,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3227, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3357, PETRI_PLACES=251, PETRI_TRANSITIONS=279} [2024-06-27 19:32:59,614 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 211 predicate places. [2024-06-27 19:32:59,614 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 279 transitions, 3357 flow [2024-06-27 19:32:59,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:59,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:59,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:59,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 19:32:59,614 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)] === [2024-06-27 19:32:59,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:59,614 INFO L85 PathProgramCache]: Analyzing trace with hash -782294674, now seen corresponding path program 11 times [2024-06-27 19:32:59,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:59,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304153315] [2024-06-27 19:32:59,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:59,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:59,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:59,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304153315] [2024-06-27 19:32:59,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304153315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:59,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:59,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:59,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705053865] [2024-06-27 19:32:59,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:59,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:59,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:59,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:59,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:59,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:32:59,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 279 transitions, 3357 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:59,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:59,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:32:59,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:00,223 INFO L124 PetriNetUnfolderBase]: 2032/3428 cut-off events. [2024-06-27 19:33:00,223 INFO L125 PetriNetUnfolderBase]: For 391227/391233 co-relation queries the response was YES. [2024-06-27 19:33:00,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26238 conditions, 3428 events. 2032/3428 cut-off events. For 391227/391233 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 21265 event pairs, 605 based on Foata normal form. 8/3435 useless extension candidates. Maximal degree in co-relation 26122. Up to 3051 conditions per place. [2024-06-27 19:33:00,254 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 252 selfloop transitions, 47 changer transitions 0/306 dead transitions. [2024-06-27 19:33:00,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 306 transitions, 4023 flow [2024-06-27 19:33:00,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:00,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:00,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:33:00,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6227106227106227 [2024-06-27 19:33:00,255 INFO L175 Difference]: Start difference. First operand has 251 places, 279 transitions, 3357 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:33:00,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 306 transitions, 4023 flow [2024-06-27 19:33:01,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 306 transitions, 3903 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:01,027 INFO L231 Difference]: Finished difference. Result has 252 places, 279 transitions, 3339 flow [2024-06-27 19:33:01,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3237, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3339, PETRI_PLACES=252, PETRI_TRANSITIONS=279} [2024-06-27 19:33:01,028 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 212 predicate places. [2024-06-27 19:33:01,028 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 279 transitions, 3339 flow [2024-06-27 19:33:01,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:01,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:01,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:01,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 19:33:01,028 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)] === [2024-06-27 19:33:01,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:01,028 INFO L85 PathProgramCache]: Analyzing trace with hash -774676114, now seen corresponding path program 12 times [2024-06-27 19:33:01,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:01,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000441501] [2024-06-27 19:33:01,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:01,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:01,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:01,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000441501] [2024-06-27 19:33:01,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000441501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:01,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:01,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:01,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736592552] [2024-06-27 19:33:01,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:01,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:01,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:01,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:01,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:01,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:33:01,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 279 transitions, 3339 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:01,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:01,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:33:01,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:01,598 INFO L124 PetriNetUnfolderBase]: 2027/3411 cut-off events. [2024-06-27 19:33:01,598 INFO L125 PetriNetUnfolderBase]: For 386008/386014 co-relation queries the response was YES. [2024-06-27 19:33:01,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25934 conditions, 3411 events. 2027/3411 cut-off events. For 386008/386014 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 21061 event pairs, 504 based on Foata normal form. 8/3418 useless extension candidates. Maximal degree in co-relation 25817. Up to 2803 conditions per place. [2024-06-27 19:33:01,630 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 244 selfloop transitions, 59 changer transitions 0/310 dead transitions. [2024-06-27 19:33:01,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 310 transitions, 4035 flow [2024-06-27 19:33:01,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:01,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:01,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:33:01,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6373626373626373 [2024-06-27 19:33:01,631 INFO L175 Difference]: Start difference. First operand has 252 places, 279 transitions, 3339 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:33:01,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 310 transitions, 4035 flow [2024-06-27 19:33:02,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 310 transitions, 3915 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:02,341 INFO L231 Difference]: Finished difference. Result has 253 places, 279 transitions, 3345 flow [2024-06-27 19:33:02,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3219, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3345, PETRI_PLACES=253, PETRI_TRANSITIONS=279} [2024-06-27 19:33:02,342 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 213 predicate places. [2024-06-27 19:33:02,342 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 279 transitions, 3345 flow [2024-06-27 19:33:02,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:02,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:02,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:02,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 19:33:02,342 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)] === [2024-06-27 19:33:02,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:02,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1981924796, now seen corresponding path program 7 times [2024-06-27 19:33:02,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:02,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675597158] [2024-06-27 19:33:02,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:02,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:02,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:02,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:02,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675597158] [2024-06-27 19:33:02,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675597158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:02,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:02,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:02,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069640333] [2024-06-27 19:33:02,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:02,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:02,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:02,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:02,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:02,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:33:02,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 279 transitions, 3345 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:02,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:02,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:33:02,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:02,993 INFO L124 PetriNetUnfolderBase]: 2131/3585 cut-off events. [2024-06-27 19:33:02,994 INFO L125 PetriNetUnfolderBase]: For 488907/488907 co-relation queries the response was YES. [2024-06-27 19:33:03,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26982 conditions, 3585 events. 2131/3585 cut-off events. For 488907/488907 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 22372 event pairs, 630 based on Foata normal form. 34/3618 useless extension candidates. Maximal degree in co-relation 26864. Up to 2955 conditions per place. [2024-06-27 19:33:03,025 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 211 selfloop transitions, 96 changer transitions 3/317 dead transitions. [2024-06-27 19:33:03,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 317 transitions, 4113 flow [2024-06-27 19:33:03,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:33:03,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:33:03,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-27 19:33:03,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6182336182336182 [2024-06-27 19:33:03,026 INFO L175 Difference]: Start difference. First operand has 253 places, 279 transitions, 3345 flow. Second operand 9 states and 217 transitions. [2024-06-27 19:33:03,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 317 transitions, 4113 flow [2024-06-27 19:33:03,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 317 transitions, 3949 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 19:33:03,827 INFO L231 Difference]: Finished difference. Result has 255 places, 279 transitions, 3410 flow [2024-06-27 19:33:03,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3181, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3410, PETRI_PLACES=255, PETRI_TRANSITIONS=279} [2024-06-27 19:33:03,828 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 215 predicate places. [2024-06-27 19:33:03,828 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 279 transitions, 3410 flow [2024-06-27 19:33:03,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:03,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:03,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:03,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 19:33:03,828 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)] === [2024-06-27 19:33:03,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:03,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1982221466, now seen corresponding path program 8 times [2024-06-27 19:33:03,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:03,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735494052] [2024-06-27 19:33:03,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:03,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:03,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:03,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:03,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735494052] [2024-06-27 19:33:03,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735494052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:03,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:03,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:03,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793841289] [2024-06-27 19:33:03,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:03,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:03,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:03,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:03,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:03,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:33:03,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 279 transitions, 3410 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:03,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:03,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:33:03,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:04,500 INFO L124 PetriNetUnfolderBase]: 2336/3940 cut-off events. [2024-06-27 19:33:04,501 INFO L125 PetriNetUnfolderBase]: For 566643/566643 co-relation queries the response was YES. [2024-06-27 19:33:04,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30389 conditions, 3940 events. 2336/3940 cut-off events. For 566643/566643 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24991 event pairs, 624 based on Foata normal form. 30/3969 useless extension candidates. Maximal degree in co-relation 30271. Up to 2751 conditions per place. [2024-06-27 19:33:04,538 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 213 selfloop transitions, 101 changer transitions 6/327 dead transitions. [2024-06-27 19:33:04,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 327 transitions, 4396 flow [2024-06-27 19:33:04,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:33:04,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:33:04,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 19:33:04,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6438746438746439 [2024-06-27 19:33:04,539 INFO L175 Difference]: Start difference. First operand has 255 places, 279 transitions, 3410 flow. Second operand 9 states and 226 transitions. [2024-06-27 19:33:04,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 327 transitions, 4396 flow [2024-06-27 19:33:05,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 327 transitions, 4180 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 19:33:05,818 INFO L231 Difference]: Finished difference. Result has 257 places, 277 transitions, 3392 flow [2024-06-27 19:33:05,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3198, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3392, PETRI_PLACES=257, PETRI_TRANSITIONS=277} [2024-06-27 19:33:05,818 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 217 predicate places. [2024-06-27 19:33:05,818 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 277 transitions, 3392 flow [2024-06-27 19:33:05,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:05,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:05,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:05,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 19:33:05,819 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)] === [2024-06-27 19:33:05,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:05,819 INFO L85 PathProgramCache]: Analyzing trace with hash 935808092, now seen corresponding path program 9 times [2024-06-27 19:33:05,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:05,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672637454] [2024-06-27 19:33:05,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:05,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:05,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:05,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672637454] [2024-06-27 19:33:05,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672637454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:05,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:05,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:05,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535024815] [2024-06-27 19:33:05,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:05,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:05,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:05,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:05,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:05,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:33:05,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 277 transitions, 3392 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:05,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:05,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:33:05,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:06,624 INFO L124 PetriNetUnfolderBase]: 2264/3810 cut-off events. [2024-06-27 19:33:06,624 INFO L125 PetriNetUnfolderBase]: For 579642/579642 co-relation queries the response was YES. [2024-06-27 19:33:06,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30026 conditions, 3810 events. 2264/3810 cut-off events. For 579642/579642 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 24059 event pairs, 656 based on Foata normal form. 34/3843 useless extension candidates. Maximal degree in co-relation 29907. Up to 3246 conditions per place. [2024-06-27 19:33:06,661 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 250 selfloop transitions, 51 changer transitions 5/313 dead transitions. [2024-06-27 19:33:06,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 313 transitions, 4150 flow [2024-06-27 19:33:06,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:06,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:06,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:33:06,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.663003663003663 [2024-06-27 19:33:06,662 INFO L175 Difference]: Start difference. First operand has 257 places, 277 transitions, 3392 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:33:06,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 313 transitions, 4150 flow [2024-06-27 19:33:07,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 313 transitions, 3778 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 19:33:07,943 INFO L231 Difference]: Finished difference. Result has 256 places, 275 transitions, 3140 flow [2024-06-27 19:33:07,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3024, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3140, PETRI_PLACES=256, PETRI_TRANSITIONS=275} [2024-06-27 19:33:07,943 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 216 predicate places. [2024-06-27 19:33:07,944 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 275 transitions, 3140 flow [2024-06-27 19:33:07,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:07,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:07,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:07,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 19:33:07,944 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)] === [2024-06-27 19:33:07,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:07,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1972093766, now seen corresponding path program 10 times [2024-06-27 19:33:07,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:07,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295940936] [2024-06-27 19:33:07,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:07,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:08,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:08,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:08,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295940936] [2024-06-27 19:33:08,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295940936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:08,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:08,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:08,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918639616] [2024-06-27 19:33:08,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:08,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:08,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:08,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:08,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:08,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:33:08,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 275 transitions, 3140 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:08,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:08,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:33:08,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:08,584 INFO L124 PetriNetUnfolderBase]: 2110/3556 cut-off events. [2024-06-27 19:33:08,584 INFO L125 PetriNetUnfolderBase]: For 490155/490155 co-relation queries the response was YES. [2024-06-27 19:33:08,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25912 conditions, 3556 events. 2110/3556 cut-off events. For 490155/490155 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 22210 event pairs, 626 based on Foata normal form. 34/3589 useless extension candidates. Maximal degree in co-relation 25793. Up to 2945 conditions per place. [2024-06-27 19:33:08,616 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 212 selfloop transitions, 85 changer transitions 6/310 dead transitions. [2024-06-27 19:33:08,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 310 transitions, 3852 flow [2024-06-27 19:33:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:33:08,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:33:08,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-27 19:33:08,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923076923076923 [2024-06-27 19:33:08,617 INFO L175 Difference]: Start difference. First operand has 256 places, 275 transitions, 3140 flow. Second operand 10 states and 231 transitions. [2024-06-27 19:33:08,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 310 transitions, 3852 flow [2024-06-27 19:33:09,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 310 transitions, 3720 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:09,340 INFO L231 Difference]: Finished difference. Result has 260 places, 271 transitions, 3153 flow [2024-06-27 19:33:09,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3008, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3153, PETRI_PLACES=260, PETRI_TRANSITIONS=271} [2024-06-27 19:33:09,341 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 220 predicate places. [2024-06-27 19:33:09,341 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 271 transitions, 3153 flow [2024-06-27 19:33:09,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:09,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:09,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:09,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 19:33:09,342 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)] === [2024-06-27 19:33:09,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:09,342 INFO L85 PathProgramCache]: Analyzing trace with hash 936177054, now seen corresponding path program 2 times [2024-06-27 19:33:09,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:09,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160998385] [2024-06-27 19:33:09,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:09,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:09,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:09,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160998385] [2024-06-27 19:33:09,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160998385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:09,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:09,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:09,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665830664] [2024-06-27 19:33:09,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:09,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:09,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:09,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:09,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:09,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:33:09,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 271 transitions, 3153 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:09,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:09,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:33:09,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:10,079 INFO L124 PetriNetUnfolderBase]: 2359/4011 cut-off events. [2024-06-27 19:33:10,079 INFO L125 PetriNetUnfolderBase]: For 625436/625436 co-relation queries the response was YES. [2024-06-27 19:33:10,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30760 conditions, 4011 events. 2359/4011 cut-off events. For 625436/625436 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25795 event pairs, 587 based on Foata normal form. 36/4046 useless extension candidates. Maximal degree in co-relation 30641. Up to 2656 conditions per place. [2024-06-27 19:33:10,115 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 250 selfloop transitions, 57 changer transitions 0/314 dead transitions. [2024-06-27 19:33:10,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 314 transitions, 4129 flow [2024-06-27 19:33:10,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:10,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:10,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 19:33:10,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6703296703296703 [2024-06-27 19:33:10,115 INFO L175 Difference]: Start difference. First operand has 260 places, 271 transitions, 3153 flow. Second operand 7 states and 183 transitions. [2024-06-27 19:33:10,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 314 transitions, 4129 flow [2024-06-27 19:33:11,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 314 transitions, 3925 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 19:33:11,395 INFO L231 Difference]: Finished difference. Result has 259 places, 275 transitions, 3185 flow [2024-06-27 19:33:11,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2953, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3185, PETRI_PLACES=259, PETRI_TRANSITIONS=275} [2024-06-27 19:33:11,395 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 219 predicate places. [2024-06-27 19:33:11,396 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 275 transitions, 3185 flow [2024-06-27 19:33:11,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:11,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:11,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:11,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 19:33:11,396 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)] === [2024-06-27 19:33:11,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:11,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1349483934, now seen corresponding path program 3 times [2024-06-27 19:33:11,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:11,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373209043] [2024-06-27 19:33:11,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:11,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:11,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:11,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373209043] [2024-06-27 19:33:11,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373209043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:11,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:11,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:11,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268132445] [2024-06-27 19:33:11,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:11,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:11,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:11,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:11,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:11,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:33:11,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 275 transitions, 3185 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:11,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:11,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:33:11,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:12,174 INFO L124 PetriNetUnfolderBase]: 2636/4520 cut-off events. [2024-06-27 19:33:12,174 INFO L125 PetriNetUnfolderBase]: For 683411/683411 co-relation queries the response was YES. [2024-06-27 19:33:12,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34753 conditions, 4520 events. 2636/4520 cut-off events. For 683411/683411 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 30008 event pairs, 623 based on Foata normal form. 36/4555 useless extension candidates. Maximal degree in co-relation 34632. Up to 2466 conditions per place. [2024-06-27 19:33:12,217 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 253 selfloop transitions, 66 changer transitions 0/326 dead transitions. [2024-06-27 19:33:12,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 326 transitions, 4383 flow [2024-06-27 19:33:12,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:12,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:12,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 19:33:12,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6698717948717948 [2024-06-27 19:33:12,218 INFO L175 Difference]: Start difference. First operand has 259 places, 275 transitions, 3185 flow. Second operand 8 states and 209 transitions. [2024-06-27 19:33:12,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 326 transitions, 4383 flow [2024-06-27 19:33:14,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 326 transitions, 4289 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:14,022 INFO L231 Difference]: Finished difference. Result has 264 places, 279 transitions, 3372 flow [2024-06-27 19:33:14,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3095, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3372, PETRI_PLACES=264, PETRI_TRANSITIONS=279} [2024-06-27 19:33:14,022 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 224 predicate places. [2024-06-27 19:33:14,022 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 279 transitions, 3372 flow [2024-06-27 19:33:14,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:14,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:14,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:14,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 19:33:14,023 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)] === [2024-06-27 19:33:14,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:14,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1971724804, now seen corresponding path program 4 times [2024-06-27 19:33:14,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:14,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060966577] [2024-06-27 19:33:14,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:14,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:14,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:14,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:14,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060966577] [2024-06-27 19:33:14,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060966577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:14,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:14,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:14,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137888419] [2024-06-27 19:33:14,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:14,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:14,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:14,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:14,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:14,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:33:14,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 279 transitions, 3372 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:14,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:14,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:33:14,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:14,871 INFO L124 PetriNetUnfolderBase]: 2886/4968 cut-off events. [2024-06-27 19:33:14,872 INFO L125 PetriNetUnfolderBase]: For 755525/755525 co-relation queries the response was YES. [2024-06-27 19:33:14,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38934 conditions, 4968 events. 2886/4968 cut-off events. For 755525/755525 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 33998 event pairs, 975 based on Foata normal form. 30/4997 useless extension candidates. Maximal degree in co-relation 38811. Up to 3240 conditions per place. [2024-06-27 19:33:14,921 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 228 selfloop transitions, 87 changer transitions 0/322 dead transitions. [2024-06-27 19:33:14,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 322 transitions, 4326 flow [2024-06-27 19:33:14,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:33:14,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:33:14,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-27 19:33:14,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-06-27 19:33:14,922 INFO L175 Difference]: Start difference. First operand has 264 places, 279 transitions, 3372 flow. Second operand 10 states and 235 transitions. [2024-06-27 19:33:14,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 322 transitions, 4326 flow [2024-06-27 19:33:16,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 322 transitions, 4211 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:16,169 INFO L231 Difference]: Finished difference. Result has 270 places, 280 transitions, 3501 flow [2024-06-27 19:33:16,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3259, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3501, PETRI_PLACES=270, PETRI_TRANSITIONS=280} [2024-06-27 19:33:16,170 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 230 predicate places. [2024-06-27 19:33:16,170 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 280 transitions, 3501 flow [2024-06-27 19:33:16,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:16,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:16,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:16,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 19:33:16,170 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)] === [2024-06-27 19:33:16,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:16,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1755798788, now seen corresponding path program 1 times [2024-06-27 19:33:16,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:16,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857854207] [2024-06-27 19:33:16,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:16,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:16,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:16,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857854207] [2024-06-27 19:33:16,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857854207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:16,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:16,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:16,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239699565] [2024-06-27 19:33:16,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:16,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:16,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:16,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:16,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:16,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:33:16,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 280 transitions, 3501 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:16,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:16,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:33:16,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:17,091 INFO L124 PetriNetUnfolderBase]: 2959/5093 cut-off events. [2024-06-27 19:33:17,091 INFO L125 PetriNetUnfolderBase]: For 718972/718972 co-relation queries the response was YES. [2024-06-27 19:33:17,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40153 conditions, 5093 events. 2959/5093 cut-off events. For 718972/718972 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 35043 event pairs, 1011 based on Foata normal form. 6/5083 useless extension candidates. Maximal degree in co-relation 40029. Up to 3756 conditions per place. [2024-06-27 19:33:17,144 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 235 selfloop transitions, 76 changer transitions 0/318 dead transitions. [2024-06-27 19:33:17,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 318 transitions, 4579 flow [2024-06-27 19:33:17,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:17,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:17,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:33:17,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6336996336996337 [2024-06-27 19:33:17,146 INFO L175 Difference]: Start difference. First operand has 270 places, 280 transitions, 3501 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:33:17,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 318 transitions, 4579 flow [2024-06-27 19:33:18,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 318 transitions, 4328 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 19:33:18,691 INFO L231 Difference]: Finished difference. Result has 269 places, 283 transitions, 3448 flow [2024-06-27 19:33:18,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3254, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3448, PETRI_PLACES=269, PETRI_TRANSITIONS=283} [2024-06-27 19:33:18,692 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 229 predicate places. [2024-06-27 19:33:18,692 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 283 transitions, 3448 flow [2024-06-27 19:33:18,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:18,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:18,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:18,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 19:33:18,692 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)] === [2024-06-27 19:33:18,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:18,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1751037188, now seen corresponding path program 2 times [2024-06-27 19:33:18,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:18,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547641968] [2024-06-27 19:33:18,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:18,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:18,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:18,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:18,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547641968] [2024-06-27 19:33:18,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547641968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:18,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:18,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:18,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44429682] [2024-06-27 19:33:18,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:18,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:18,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:18,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:18,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:18,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:33:18,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 283 transitions, 3448 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:18,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:18,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:33:18,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:19,518 INFO L124 PetriNetUnfolderBase]: 2852/4931 cut-off events. [2024-06-27 19:33:19,518 INFO L125 PetriNetUnfolderBase]: For 640311/640311 co-relation queries the response was YES. [2024-06-27 19:33:19,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37333 conditions, 4931 events. 2852/4931 cut-off events. For 640311/640311 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 34053 event pairs, 1018 based on Foata normal form. 6/4935 useless extension candidates. Maximal degree in co-relation 37209. Up to 4288 conditions per place. [2024-06-27 19:33:19,566 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 240 selfloop transitions, 73 changer transitions 0/320 dead transitions. [2024-06-27 19:33:19,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 320 transitions, 4350 flow [2024-06-27 19:33:19,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:19,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:19,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:33:19,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-27 19:33:19,567 INFO L175 Difference]: Start difference. First operand has 269 places, 283 transitions, 3448 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:33:19,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 320 transitions, 4350 flow [2024-06-27 19:33:20,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 320 transitions, 4266 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 19:33:20,776 INFO L231 Difference]: Finished difference. Result has 275 places, 284 transitions, 3534 flow [2024-06-27 19:33:20,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3372, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3534, PETRI_PLACES=275, PETRI_TRANSITIONS=284} [2024-06-27 19:33:20,776 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 235 predicate places. [2024-06-27 19:33:20,777 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 284 transitions, 3534 flow [2024-06-27 19:33:20,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:20,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:20,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:20,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 19:33:20,777 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)] === [2024-06-27 19:33:20,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:20,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1278288636, now seen corresponding path program 3 times [2024-06-27 19:33:20,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:20,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291376774] [2024-06-27 19:33:20,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:20,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:20,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:20,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291376774] [2024-06-27 19:33:20,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291376774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:20,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:20,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:20,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248324213] [2024-06-27 19:33:20,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:20,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:20,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:20,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:20,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:20,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:33:20,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 284 transitions, 3534 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:20,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:20,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:33:20,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:21,637 INFO L124 PetriNetUnfolderBase]: 2834/4913 cut-off events. [2024-06-27 19:33:21,638 INFO L125 PetriNetUnfolderBase]: For 606424/606424 co-relation queries the response was YES. [2024-06-27 19:33:21,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36533 conditions, 4913 events. 2834/4913 cut-off events. For 606424/606424 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 34070 event pairs, 1116 based on Foata normal form. 8/4919 useless extension candidates. Maximal degree in co-relation 36407. Up to 4368 conditions per place. [2024-06-27 19:33:21,687 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 242 selfloop transitions, 63 changer transitions 0/312 dead transitions. [2024-06-27 19:33:21,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 312 transitions, 4226 flow [2024-06-27 19:33:21,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:21,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 19:33:21,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592948717948718 [2024-06-27 19:33:21,689 INFO L175 Difference]: Start difference. First operand has 275 places, 284 transitions, 3534 flow. Second operand 8 states and 185 transitions. [2024-06-27 19:33:21,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 312 transitions, 4226 flow [2024-06-27 19:33:23,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 312 transitions, 4074 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:23,348 INFO L231 Difference]: Finished difference. Result has 277 places, 284 transitions, 3513 flow [2024-06-27 19:33:23,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3382, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3513, PETRI_PLACES=277, PETRI_TRANSITIONS=284} [2024-06-27 19:33:23,349 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 237 predicate places. [2024-06-27 19:33:23,349 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 284 transitions, 3513 flow [2024-06-27 19:33:23,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:23,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:23,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:23,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 19:33:23,349 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)] === [2024-06-27 19:33:23,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:23,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1547221588, now seen corresponding path program 4 times [2024-06-27 19:33:23,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:23,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153190014] [2024-06-27 19:33:23,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:23,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:23,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:23,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153190014] [2024-06-27 19:33:23,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153190014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:23,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:23,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:23,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157173779] [2024-06-27 19:33:23,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:23,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:23,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:23,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:23,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:23,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:33:23,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 284 transitions, 3513 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:23,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:23,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:33:23,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:24,200 INFO L124 PetriNetUnfolderBase]: 2854/4935 cut-off events. [2024-06-27 19:33:24,200 INFO L125 PetriNetUnfolderBase]: For 616908/616908 co-relation queries the response was YES. [2024-06-27 19:33:24,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36772 conditions, 4935 events. 2854/4935 cut-off events. For 616908/616908 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 34218 event pairs, 1100 based on Foata normal form. 6/4937 useless extension candidates. Maximal degree in co-relation 36645. Up to 4370 conditions per place. [2024-06-27 19:33:24,252 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 244 selfloop transitions, 66 changer transitions 0/317 dead transitions. [2024-06-27 19:33:24,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 317 transitions, 4243 flow [2024-06-27 19:33:24,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:33:24,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:33:24,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-27 19:33:24,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584045584045584 [2024-06-27 19:33:24,253 INFO L175 Difference]: Start difference. First operand has 277 places, 284 transitions, 3513 flow. Second operand 9 states and 205 transitions. [2024-06-27 19:33:24,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 317 transitions, 4243 flow [2024-06-27 19:33:25,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 317 transitions, 4097 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:33:25,947 INFO L231 Difference]: Finished difference. Result has 279 places, 285 transitions, 3517 flow [2024-06-27 19:33:25,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3367, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3517, PETRI_PLACES=279, PETRI_TRANSITIONS=285} [2024-06-27 19:33:25,948 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 239 predicate places. [2024-06-27 19:33:25,948 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 285 transitions, 3517 flow [2024-06-27 19:33:25,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:25,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:25,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:25,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 19:33:25,948 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)] === [2024-06-27 19:33:25,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:25,949 INFO L85 PathProgramCache]: Analyzing trace with hash 653100888, now seen corresponding path program 5 times [2024-06-27 19:33:25,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:25,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011969217] [2024-06-27 19:33:25,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:25,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:26,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:26,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011969217] [2024-06-27 19:33:26,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011969217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:26,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:26,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:26,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249168346] [2024-06-27 19:33:26,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:26,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:26,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:26,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:26,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:26,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:33:26,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 285 transitions, 3517 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:26,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:26,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:33:26,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:26,821 INFO L124 PetriNetUnfolderBase]: 2882/4985 cut-off events. [2024-06-27 19:33:26,822 INFO L125 PetriNetUnfolderBase]: For 637934/637934 co-relation queries the response was YES. [2024-06-27 19:33:26,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37154 conditions, 4985 events. 2882/4985 cut-off events. For 637934/637934 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 34549 event pairs, 1118 based on Foata normal form. 8/4991 useless extension candidates. Maximal degree in co-relation 37026. Up to 4444 conditions per place. [2024-06-27 19:33:26,871 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 243 selfloop transitions, 61 changer transitions 0/311 dead transitions. [2024-06-27 19:33:26,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 311 transitions, 4211 flow [2024-06-27 19:33:26,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:26,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:26,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 19:33:26,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 19:33:26,872 INFO L175 Difference]: Start difference. First operand has 279 places, 285 transitions, 3517 flow. Second operand 8 states and 182 transitions. [2024-06-27 19:33:26,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 311 transitions, 4211 flow [2024-06-27 19:33:28,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 311 transitions, 4075 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 19:33:28,529 INFO L231 Difference]: Finished difference. Result has 280 places, 286 transitions, 3522 flow [2024-06-27 19:33:28,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3381, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3522, PETRI_PLACES=280, PETRI_TRANSITIONS=286} [2024-06-27 19:33:28,530 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 240 predicate places. [2024-06-27 19:33:28,530 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 286 transitions, 3522 flow [2024-06-27 19:33:28,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:28,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:28,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:28,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 19:33:28,530 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)] === [2024-06-27 19:33:28,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:28,531 INFO L85 PathProgramCache]: Analyzing trace with hash 653857590, now seen corresponding path program 6 times [2024-06-27 19:33:28,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:28,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822965370] [2024-06-27 19:33:28,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:28,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:28,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:28,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822965370] [2024-06-27 19:33:28,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822965370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:28,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:28,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:28,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596359473] [2024-06-27 19:33:28,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:28,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:28,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:28,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:28,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:28,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:33:28,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 286 transitions, 3522 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:28,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:28,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:33:28,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:29,430 INFO L124 PetriNetUnfolderBase]: 2902/5024 cut-off events. [2024-06-27 19:33:29,430 INFO L125 PetriNetUnfolderBase]: For 646939/646939 co-relation queries the response was YES. [2024-06-27 19:33:29,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37485 conditions, 5024 events. 2902/5024 cut-off events. For 646939/646939 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 34903 event pairs, 1116 based on Foata normal form. 6/5027 useless extension candidates. Maximal degree in co-relation 37356. Up to 4499 conditions per place. [2024-06-27 19:33:29,470 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 281 selfloop transitions, 25 changer transitions 0/313 dead transitions. [2024-06-27 19:33:29,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 313 transitions, 4388 flow [2024-06-27 19:33:29,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:29,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:29,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-27 19:33:29,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5737179487179487 [2024-06-27 19:33:29,471 INFO L175 Difference]: Start difference. First operand has 280 places, 286 transitions, 3522 flow. Second operand 8 states and 179 transitions. [2024-06-27 19:33:29,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 313 transitions, 4388 flow [2024-06-27 19:33:31,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 313 transitions, 4265 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:31,185 INFO L231 Difference]: Finished difference. Result has 283 places, 287 transitions, 3476 flow [2024-06-27 19:33:31,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3399, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3476, PETRI_PLACES=283, PETRI_TRANSITIONS=287} [2024-06-27 19:33:31,186 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 243 predicate places. [2024-06-27 19:33:31,186 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 287 transitions, 3476 flow [2024-06-27 19:33:31,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:31,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:31,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:31,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 19:33:31,187 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)] === [2024-06-27 19:33:31,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:31,187 INFO L85 PathProgramCache]: Analyzing trace with hash 292660896, now seen corresponding path program 1 times [2024-06-27 19:33:31,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:31,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290876376] [2024-06-27 19:33:31,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:31,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:31,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:31,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290876376] [2024-06-27 19:33:31,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290876376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:31,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:31,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:31,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651759282] [2024-06-27 19:33:31,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:31,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:31,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:31,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:31,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:31,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:33:31,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 287 transitions, 3476 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:31,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:31,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:33:31,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:32,131 INFO L124 PetriNetUnfolderBase]: 2922/5033 cut-off events. [2024-06-27 19:33:32,131 INFO L125 PetriNetUnfolderBase]: For 664011/664011 co-relation queries the response was YES. [2024-06-27 19:33:32,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37798 conditions, 5033 events. 2922/5033 cut-off events. For 664011/664011 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 34316 event pairs, 988 based on Foata normal form. 6/5029 useless extension candidates. Maximal degree in co-relation 37667. Up to 3607 conditions per place. [2024-06-27 19:33:32,183 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 230 selfloop transitions, 86 changer transitions 0/323 dead transitions. [2024-06-27 19:33:32,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 323 transitions, 4552 flow [2024-06-27 19:33:32,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:32,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:32,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:33:32,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6336996336996337 [2024-06-27 19:33:32,184 INFO L175 Difference]: Start difference. First operand has 283 places, 287 transitions, 3476 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:33:32,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 323 transitions, 4552 flow [2024-06-27 19:33:33,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 323 transitions, 4501 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:33,668 INFO L231 Difference]: Finished difference. Result has 285 places, 288 transitions, 3617 flow [2024-06-27 19:33:33,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3425, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3617, PETRI_PLACES=285, PETRI_TRANSITIONS=288} [2024-06-27 19:33:33,669 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 245 predicate places. [2024-06-27 19:33:33,669 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 288 transitions, 3617 flow [2024-06-27 19:33:33,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:33,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:33,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:33,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 19:33:33,669 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)] === [2024-06-27 19:33:33,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:33,669 INFO L85 PathProgramCache]: Analyzing trace with hash 564719578, now seen corresponding path program 2 times [2024-06-27 19:33:33,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:33,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26148070] [2024-06-27 19:33:33,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:33,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:33,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:33,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26148070] [2024-06-27 19:33:33,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26148070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:33,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:33,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:33,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493281760] [2024-06-27 19:33:33,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:33,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:33,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:33,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:33,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:33,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:33:33,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 288 transitions, 3617 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:33,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:33,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:33:33,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:34,543 INFO L124 PetriNetUnfolderBase]: 2942/5064 cut-off events. [2024-06-27 19:33:34,543 INFO L125 PetriNetUnfolderBase]: For 683481/683481 co-relation queries the response was YES. [2024-06-27 19:33:34,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38506 conditions, 5064 events. 2942/5064 cut-off events. For 683481/683481 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 35117 event pairs, 1087 based on Foata normal form. 6/5064 useless extension candidates. Maximal degree in co-relation 38374. Up to 4240 conditions per place. [2024-06-27 19:33:34,593 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 246 selfloop transitions, 71 changer transitions 0/324 dead transitions. [2024-06-27 19:33:34,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 324 transitions, 4385 flow [2024-06-27 19:33:34,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:34,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:34,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:33:34,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6121794871794872 [2024-06-27 19:33:34,594 INFO L175 Difference]: Start difference. First operand has 285 places, 288 transitions, 3617 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:33:34,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 324 transitions, 4385 flow [2024-06-27 19:33:36,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 324 transitions, 4157 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:36,494 INFO L231 Difference]: Finished difference. Result has 288 places, 289 transitions, 3555 flow [2024-06-27 19:33:36,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3555, PETRI_PLACES=288, PETRI_TRANSITIONS=289} [2024-06-27 19:33:36,494 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 248 predicate places. [2024-06-27 19:33:36,494 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 289 transitions, 3555 flow [2024-06-27 19:33:36,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:36,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:36,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:36,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 19:33:36,495 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)] === [2024-06-27 19:33:36,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:36,495 INFO L85 PathProgramCache]: Analyzing trace with hash 292930007, now seen corresponding path program 1 times [2024-06-27 19:33:36,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:36,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694237549] [2024-06-27 19:33:36,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:36,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:36,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:36,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694237549] [2024-06-27 19:33:36,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694237549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:36,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:36,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:36,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003482361] [2024-06-27 19:33:36,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:36,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:36,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:36,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:36,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:36,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:33:36,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 289 transitions, 3555 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:36,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:36,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:33:36,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:37,560 INFO L124 PetriNetUnfolderBase]: 3670/6295 cut-off events. [2024-06-27 19:33:37,561 INFO L125 PetriNetUnfolderBase]: For 1217244/1217244 co-relation queries the response was YES. [2024-06-27 19:33:37,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53744 conditions, 6295 events. 3670/6295 cut-off events. For 1217244/1217244 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 45579 event pairs, 1451 based on Foata normal form. 30/6323 useless extension candidates. Maximal degree in co-relation 53611. Up to 4008 conditions per place. [2024-06-27 19:33:37,629 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 181 selfloop transitions, 140 changer transitions 7/335 dead transitions. [2024-06-27 19:33:37,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 335 transitions, 4657 flow [2024-06-27 19:33:37,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:37,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:37,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:33:37,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-27 19:33:37,630 INFO L175 Difference]: Start difference. First operand has 288 places, 289 transitions, 3555 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:33:37,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 335 transitions, 4657 flow [2024-06-27 19:33:39,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 335 transitions, 4511 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:39,907 INFO L231 Difference]: Finished difference. Result has 291 places, 293 transitions, 3845 flow [2024-06-27 19:33:39,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3409, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3845, PETRI_PLACES=291, PETRI_TRANSITIONS=293} [2024-06-27 19:33:39,907 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 251 predicate places. [2024-06-27 19:33:39,908 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 293 transitions, 3845 flow [2024-06-27 19:33:39,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:39,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:39,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:39,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 19:33:39,908 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)] === [2024-06-27 19:33:39,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:39,909 INFO L85 PathProgramCache]: Analyzing trace with hash 381495426, now seen corresponding path program 3 times [2024-06-27 19:33:39,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:39,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597363533] [2024-06-27 19:33:39,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:39,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:39,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:39,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:39,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597363533] [2024-06-27 19:33:39,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597363533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:39,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:39,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:39,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521672699] [2024-06-27 19:33:39,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:39,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:39,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:39,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:39,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:40,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:33:40,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 293 transitions, 3845 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:40,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:40,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:33:40,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:41,026 INFO L124 PetriNetUnfolderBase]: 3640/6277 cut-off events. [2024-06-27 19:33:41,026 INFO L125 PetriNetUnfolderBase]: For 1165957/1165957 co-relation queries the response was YES. [2024-06-27 19:33:41,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54199 conditions, 6277 events. 3640/6277 cut-off events. For 1165957/1165957 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 45658 event pairs, 1554 based on Foata normal form. 6/6277 useless extension candidates. Maximal degree in co-relation 54064. Up to 5606 conditions per place. [2024-06-27 19:33:41,092 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 253 selfloop transitions, 63 changer transitions 0/323 dead transitions. [2024-06-27 19:33:41,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 323 transitions, 4579 flow [2024-06-27 19:33:41,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:33:41,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:33:41,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-27 19:33:41,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5754985754985755 [2024-06-27 19:33:41,093 INFO L175 Difference]: Start difference. First operand has 291 places, 293 transitions, 3845 flow. Second operand 9 states and 202 transitions. [2024-06-27 19:33:41,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 323 transitions, 4579 flow [2024-06-27 19:33:44,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 323 transitions, 4309 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:44,167 INFO L231 Difference]: Finished difference. Result has 295 places, 294 transitions, 3721 flow [2024-06-27 19:33:44,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3575, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3721, PETRI_PLACES=295, PETRI_TRANSITIONS=294} [2024-06-27 19:33:44,167 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 255 predicate places. [2024-06-27 19:33:44,168 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 294 transitions, 3721 flow [2024-06-27 19:33:44,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:44,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:44,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:44,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 19:33:44,168 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)] === [2024-06-27 19:33:44,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:44,168 INFO L85 PathProgramCache]: Analyzing trace with hash 381495767, now seen corresponding path program 2 times [2024-06-27 19:33:44,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:44,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088684716] [2024-06-27 19:33:44,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:44,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:44,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:44,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088684716] [2024-06-27 19:33:44,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088684716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:44,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:44,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:44,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207112677] [2024-06-27 19:33:44,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:44,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:44,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:44,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:44,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:44,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:33:44,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 294 transitions, 3721 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:44,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:44,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:33:44,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:45,335 INFO L124 PetriNetUnfolderBase]: 3888/6695 cut-off events. [2024-06-27 19:33:45,335 INFO L125 PetriNetUnfolderBase]: For 1390769/1390769 co-relation queries the response was YES. [2024-06-27 19:33:45,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58645 conditions, 6695 events. 3888/6695 cut-off events. For 1390769/1390769 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 49264 event pairs, 1649 based on Foata normal form. 30/6723 useless extension candidates. Maximal degree in co-relation 58509. Up to 5529 conditions per place. [2024-06-27 19:33:45,410 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 187 selfloop transitions, 132 changer transitions 4/330 dead transitions. [2024-06-27 19:33:45,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 330 transitions, 4711 flow [2024-06-27 19:33:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:45,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:45,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:33:45,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217948717948718 [2024-06-27 19:33:45,411 INFO L175 Difference]: Start difference. First operand has 295 places, 294 transitions, 3721 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:33:45,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 330 transitions, 4711 flow [2024-06-27 19:33:48,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 330 transitions, 4579 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 19:33:48,983 INFO L231 Difference]: Finished difference. Result has 296 places, 295 transitions, 3897 flow [2024-06-27 19:33:48,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3589, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3897, PETRI_PLACES=296, PETRI_TRANSITIONS=295} [2024-06-27 19:33:48,984 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 256 predicate places. [2024-06-27 19:33:48,984 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 295 transitions, 3897 flow [2024-06-27 19:33:48,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:48,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:48,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:48,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 19:33:48,984 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)] === [2024-06-27 19:33:48,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:48,985 INFO L85 PathProgramCache]: Analyzing trace with hash 381643637, now seen corresponding path program 3 times [2024-06-27 19:33:48,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:48,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688571543] [2024-06-27 19:33:48,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:48,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:49,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:49,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688571543] [2024-06-27 19:33:49,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688571543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:49,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:49,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:49,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924657430] [2024-06-27 19:33:49,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:49,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:49,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:49,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:49,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:49,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:33:49,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 295 transitions, 3897 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:49,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:49,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:33:49,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:50,182 INFO L124 PetriNetUnfolderBase]: 3789/6544 cut-off events. [2024-06-27 19:33:50,182 INFO L125 PetriNetUnfolderBase]: For 1316098/1316098 co-relation queries the response was YES. [2024-06-27 19:33:50,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55616 conditions, 6544 events. 3789/6544 cut-off events. For 1316098/1316098 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 48145 event pairs, 1650 based on Foata normal form. 34/6576 useless extension candidates. Maximal degree in co-relation 55479. Up to 5669 conditions per place. [2024-06-27 19:33:50,253 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 183 selfloop transitions, 128 changer transitions 4/322 dead transitions. [2024-06-27 19:33:50,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 322 transitions, 4613 flow [2024-06-27 19:33:50,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:50,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:50,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 19:33:50,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993589743589743 [2024-06-27 19:33:50,254 INFO L175 Difference]: Start difference. First operand has 296 places, 295 transitions, 3897 flow. Second operand 8 states and 187 transitions. [2024-06-27 19:33:50,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 322 transitions, 4613 flow [2024-06-27 19:33:53,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 322 transitions, 4418 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:53,580 INFO L231 Difference]: Finished difference. Result has 300 places, 293 transitions, 3934 flow [2024-06-27 19:33:53,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3702, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3934, PETRI_PLACES=300, PETRI_TRANSITIONS=293} [2024-06-27 19:33:53,580 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 260 predicate places. [2024-06-27 19:33:53,580 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 293 transitions, 3934 flow [2024-06-27 19:33:53,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:53,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:53,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:53,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 19:33:53,580 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)] === [2024-06-27 19:33:53,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:53,581 INFO L85 PathProgramCache]: Analyzing trace with hash 699850259, now seen corresponding path program 4 times [2024-06-27 19:33:53,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:53,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841331295] [2024-06-27 19:33:53,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:53,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:53,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:53,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841331295] [2024-06-27 19:33:53,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841331295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:53,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:53,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:53,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612814851] [2024-06-27 19:33:53,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:53,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:53,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:53,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:53,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:53,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:33:53,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 293 transitions, 3934 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:53,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:53,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:33:53,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:54,769 INFO L124 PetriNetUnfolderBase]: 3621/6233 cut-off events. [2024-06-27 19:33:54,770 INFO L125 PetriNetUnfolderBase]: For 1343840/1343840 co-relation queries the response was YES. [2024-06-27 19:33:54,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54874 conditions, 6233 events. 3621/6233 cut-off events. For 1343840/1343840 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 45314 event pairs, 1534 based on Foata normal form. 34/6266 useless extension candidates. Maximal degree in co-relation 54735. Up to 5566 conditions per place. [2024-06-27 19:33:54,827 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 262 selfloop transitions, 36 changer transitions 15/320 dead transitions. [2024-06-27 19:33:54,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 320 transitions, 4671 flow [2024-06-27 19:33:54,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:33:54,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:33:54,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-27 19:33:54,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5538461538461539 [2024-06-27 19:33:54,828 INFO L175 Difference]: Start difference. First operand has 300 places, 293 transitions, 3934 flow. Second operand 10 states and 216 transitions. [2024-06-27 19:33:54,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 320 transitions, 4671 flow [2024-06-27 19:33:57,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 320 transitions, 4400 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:33:57,223 INFO L231 Difference]: Finished difference. Result has 303 places, 287 transitions, 3666 flow [2024-06-27 19:33:57,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3663, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3666, PETRI_PLACES=303, PETRI_TRANSITIONS=287} [2024-06-27 19:33:57,223 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 263 predicate places. [2024-06-27 19:33:57,223 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 287 transitions, 3666 flow [2024-06-27 19:33:57,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:57,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:57,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:57,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 19:33:57,224 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)] === [2024-06-27 19:33:57,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:57,224 INFO L85 PathProgramCache]: Analyzing trace with hash 500548469, now seen corresponding path program 5 times [2024-06-27 19:33:57,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:57,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836386311] [2024-06-27 19:33:57,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:57,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:57,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:57,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:57,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836386311] [2024-06-27 19:33:57,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836386311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:57,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:57,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:57,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164750380] [2024-06-27 19:33:57,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:57,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:57,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:57,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:57,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:57,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:33:57,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 287 transitions, 3666 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:57,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:57,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:33:57,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:58,252 INFO L124 PetriNetUnfolderBase]: 3427/5921 cut-off events. [2024-06-27 19:33:58,253 INFO L125 PetriNetUnfolderBase]: For 1241668/1241668 co-relation queries the response was YES. [2024-06-27 19:33:58,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50596 conditions, 5921 events. 3427/5921 cut-off events. For 1241668/1241668 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 42689 event pairs, 1442 based on Foata normal form. 34/5954 useless extension candidates. Maximal degree in co-relation 50456. Up to 5268 conditions per place. [2024-06-27 19:33:58,320 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 261 selfloop transitions, 31 changer transitions 13/312 dead transitions. [2024-06-27 19:33:58,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 312 transitions, 4356 flow [2024-06-27 19:33:58,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:33:58,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:33:58,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-27 19:33:58,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-27 19:33:58,321 INFO L175 Difference]: Start difference. First operand has 303 places, 287 transitions, 3666 flow. Second operand 9 states and 198 transitions. [2024-06-27 19:33:58,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 312 transitions, 4356 flow [2024-06-27 19:34:00,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 312 transitions, 4274 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 19:34:00,435 INFO L231 Difference]: Finished difference. Result has 301 places, 282 transitions, 3559 flow [2024-06-27 19:34:00,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3584, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3559, PETRI_PLACES=301, PETRI_TRANSITIONS=282} [2024-06-27 19:34:00,435 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 261 predicate places. [2024-06-27 19:34:00,435 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 282 transitions, 3559 flow [2024-06-27 19:34:00,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:00,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:00,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:00,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 19:34:00,435 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)] === [2024-06-27 19:34:00,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:00,436 INFO L85 PathProgramCache]: Analyzing trace with hash 164811091, now seen corresponding path program 6 times [2024-06-27 19:34:00,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:00,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531196460] [2024-06-27 19:34:00,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:00,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:00,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:00,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531196460] [2024-06-27 19:34:00,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531196460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:00,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:00,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:00,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945623891] [2024-06-27 19:34:00,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:00,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:00,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:00,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:00,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:00,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:34:00,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 282 transitions, 3559 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:00,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:00,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:34:00,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:01,477 INFO L124 PetriNetUnfolderBase]: 3379/5863 cut-off events. [2024-06-27 19:34:01,477 INFO L125 PetriNetUnfolderBase]: For 1224632/1224632 co-relation queries the response was YES. [2024-06-27 19:34:01,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50144 conditions, 5863 events. 3379/5863 cut-off events. For 1224632/1224632 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 42403 event pairs, 1402 based on Foata normal form. 30/5892 useless extension candidates. Maximal degree in co-relation 50004. Up to 5174 conditions per place. [2024-06-27 19:34:01,540 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 265 selfloop transitions, 32 changer transitions 8/312 dead transitions. [2024-06-27 19:34:01,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 312 transitions, 4300 flow [2024-06-27 19:34:01,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:34:01,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:34:01,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-27 19:34:01,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698005698005698 [2024-06-27 19:34:01,541 INFO L175 Difference]: Start difference. First operand has 301 places, 282 transitions, 3559 flow. Second operand 9 states and 200 transitions. [2024-06-27 19:34:01,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 312 transitions, 4300 flow [2024-06-27 19:34:03,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 312 transitions, 4218 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 19:34:03,863 INFO L231 Difference]: Finished difference. Result has 299 places, 281 transitions, 3545 flow [2024-06-27 19:34:03,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3477, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3545, PETRI_PLACES=299, PETRI_TRANSITIONS=281} [2024-06-27 19:34:03,863 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 259 predicate places. [2024-06-27 19:34:03,863 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 281 transitions, 3545 flow [2024-06-27 19:34:03,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:03,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:03,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:03,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 19:34:03,863 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)] === [2024-06-27 19:34:03,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:03,864 INFO L85 PathProgramCache]: Analyzing trace with hash 164810750, now seen corresponding path program 4 times [2024-06-27 19:34:03,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:03,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128062356] [2024-06-27 19:34:03,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:03,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:03,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:03,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128062356] [2024-06-27 19:34:03,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128062356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:03,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:03,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:03,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184905513] [2024-06-27 19:34:03,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:03,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:03,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:03,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:03,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:03,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:34:03,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 281 transitions, 3545 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:03,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:03,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:34:03,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:04,844 INFO L124 PetriNetUnfolderBase]: 3265/5661 cut-off events. [2024-06-27 19:34:04,844 INFO L125 PetriNetUnfolderBase]: For 1110506/1110506 co-relation queries the response was YES. [2024-06-27 19:34:04,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48815 conditions, 5661 events. 3265/5661 cut-off events. For 1110506/1110506 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 40577 event pairs, 1390 based on Foata normal form. 6/5662 useless extension candidates. Maximal degree in co-relation 48676. Up to 5143 conditions per place. [2024-06-27 19:34:04,904 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 275 selfloop transitions, 23 changer transitions 0/305 dead transitions. [2024-06-27 19:34:04,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 305 transitions, 4211 flow [2024-06-27 19:34:04,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:04,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:04,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-27 19:34:04,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-27 19:34:04,905 INFO L175 Difference]: Start difference. First operand has 299 places, 281 transitions, 3545 flow. Second operand 8 states and 176 transitions. [2024-06-27 19:34:04,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 305 transitions, 4211 flow [2024-06-27 19:34:07,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 305 transitions, 4123 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 19:34:07,620 INFO L231 Difference]: Finished difference. Result has 300 places, 281 transitions, 3507 flow [2024-06-27 19:34:07,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3457, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3507, PETRI_PLACES=300, PETRI_TRANSITIONS=281} [2024-06-27 19:34:07,620 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 260 predicate places. [2024-06-27 19:34:07,620 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 281 transitions, 3507 flow [2024-06-27 19:34:07,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:07,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:07,621 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] [2024-06-27 19:34:07,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 19:34:07,621 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)] === [2024-06-27 19:34:07,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:07,621 INFO L85 PathProgramCache]: Analyzing trace with hash 170536543, now seen corresponding path program 1 times [2024-06-27 19:34:07,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:07,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682309712] [2024-06-27 19:34:07,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:07,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:07,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:07,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682309712] [2024-06-27 19:34:07,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682309712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:07,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:07,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:07,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108377906] [2024-06-27 19:34:07,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:07,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:07,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:07,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:07,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:07,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:34:07,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 281 transitions, 3507 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:07,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:07,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:34:07,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:08,602 INFO L124 PetriNetUnfolderBase]: 3191/5531 cut-off events. [2024-06-27 19:34:08,602 INFO L125 PetriNetUnfolderBase]: For 1110803/1110803 co-relation queries the response was YES. [2024-06-27 19:34:08,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45870 conditions, 5531 events. 3191/5531 cut-off events. For 1110803/1110803 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 39401 event pairs, 1253 based on Foata normal form. 30/5560 useless extension candidates. Maximal degree in co-relation 45730. Up to 4689 conditions per place. [2024-06-27 19:34:08,659 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 253 selfloop transitions, 23 changer transitions 30/313 dead transitions. [2024-06-27 19:34:08,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 313 transitions, 4235 flow [2024-06-27 19:34:08,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:34:08,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:34:08,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-27 19:34:08,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564102564102564 [2024-06-27 19:34:08,660 INFO L175 Difference]: Start difference. First operand has 300 places, 281 transitions, 3507 flow. Second operand 10 states and 217 transitions. [2024-06-27 19:34:08,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 313 transitions, 4235 flow [2024-06-27 19:34:11,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 313 transitions, 4173 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:34:11,152 INFO L231 Difference]: Finished difference. Result has 303 places, 267 transitions, 3292 flow [2024-06-27 19:34:11,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3445, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3292, PETRI_PLACES=303, PETRI_TRANSITIONS=267} [2024-06-27 19:34:11,152 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 263 predicate places. [2024-06-27 19:34:11,152 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 267 transitions, 3292 flow [2024-06-27 19:34:11,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:11,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:11,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:11,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 19:34:11,152 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)] === [2024-06-27 19:34:11,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:11,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1654577152, now seen corresponding path program 7 times [2024-06-27 19:34:11,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:11,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312607542] [2024-06-27 19:34:11,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:11,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:11,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:11,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312607542] [2024-06-27 19:34:11,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312607542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:11,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:11,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:11,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537571419] [2024-06-27 19:34:11,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:11,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:11,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:11,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:11,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:11,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:34:11,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 267 transitions, 3292 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:11,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:11,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:34:11,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:12,077 INFO L124 PetriNetUnfolderBase]: 2986/5157 cut-off events. [2024-06-27 19:34:12,077 INFO L125 PetriNetUnfolderBase]: For 1047083/1047086 co-relation queries the response was YES. [2024-06-27 19:34:12,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44610 conditions, 5157 events. 2986/5157 cut-off events. For 1047083/1047086 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 36058 event pairs, 1249 based on Foata normal form. 9/5164 useless extension candidates. Maximal degree in co-relation 44469. Up to 4626 conditions per place. [2024-06-27 19:34:12,129 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 228 selfloop transitions, 55 changer transitions 0/290 dead transitions. [2024-06-27 19:34:12,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 290 transitions, 3937 flow [2024-06-27 19:34:12,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:12,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:12,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-27 19:34:12,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-27 19:34:12,130 INFO L175 Difference]: Start difference. First operand has 303 places, 267 transitions, 3292 flow. Second operand 8 states and 180 transitions. [2024-06-27 19:34:12,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 290 transitions, 3937 flow [2024-06-27 19:34:14,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 290 transitions, 3848 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-27 19:34:14,473 INFO L231 Difference]: Finished difference. Result has 287 places, 268 transitions, 3333 flow [2024-06-27 19:34:14,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3203, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3333, PETRI_PLACES=287, PETRI_TRANSITIONS=268} [2024-06-27 19:34:14,473 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 247 predicate places. [2024-06-27 19:34:14,473 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 268 transitions, 3333 flow [2024-06-27 19:34:14,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:14,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:14,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:14,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 19:34:14,474 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)] === [2024-06-27 19:34:14,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:14,474 INFO L85 PathProgramCache]: Analyzing trace with hash -703905864, now seen corresponding path program 8 times [2024-06-27 19:34:14,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:14,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100563905] [2024-06-27 19:34:14,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:14,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:14,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:14,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100563905] [2024-06-27 19:34:14,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100563905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:14,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:14,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:14,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468998041] [2024-06-27 19:34:14,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:14,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:14,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:14,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:14,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:14,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:34:14,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 268 transitions, 3333 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:14,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:14,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:34:14,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:15,370 INFO L124 PetriNetUnfolderBase]: 2968/5113 cut-off events. [2024-06-27 19:34:15,370 INFO L125 PetriNetUnfolderBase]: For 1015609/1015612 co-relation queries the response was YES. [2024-06-27 19:34:15,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43748 conditions, 5113 events. 2968/5113 cut-off events. For 1015609/1015612 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 35557 event pairs, 1225 based on Foata normal form. 9/5120 useless extension candidates. Maximal degree in co-relation 43613. Up to 4600 conditions per place. [2024-06-27 19:34:15,423 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 226 selfloop transitions, 55 changer transitions 0/288 dead transitions. [2024-06-27 19:34:15,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 288 transitions, 3955 flow [2024-06-27 19:34:15,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:34:15,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:34:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-27 19:34:15,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5498575498575499 [2024-06-27 19:34:15,424 INFO L175 Difference]: Start difference. First operand has 287 places, 268 transitions, 3333 flow. Second operand 9 states and 193 transitions. [2024-06-27 19:34:15,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 288 transitions, 3955 flow [2024-06-27 19:34:17,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 288 transitions, 3842 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:17,907 INFO L231 Difference]: Finished difference. Result has 290 places, 268 transitions, 3335 flow [2024-06-27 19:34:17,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3220, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3335, PETRI_PLACES=290, PETRI_TRANSITIONS=268} [2024-06-27 19:34:17,908 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 250 predicate places. [2024-06-27 19:34:17,908 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 268 transitions, 3335 flow [2024-06-27 19:34:17,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:17,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:17,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:17,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 19:34:17,909 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)] === [2024-06-27 19:34:17,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:17,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1319328772, now seen corresponding path program 9 times [2024-06-27 19:34:17,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:17,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258925238] [2024-06-27 19:34:17,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:17,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:17,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:17,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258925238] [2024-06-27 19:34:17,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258925238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:17,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:17,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:17,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296386993] [2024-06-27 19:34:17,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:17,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:17,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:17,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:17,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:18,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:34:18,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 268 transitions, 3335 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:18,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:18,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:34:18,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:18,789 INFO L124 PetriNetUnfolderBase]: 2955/5095 cut-off events. [2024-06-27 19:34:18,789 INFO L125 PetriNetUnfolderBase]: For 1003940/1003940 co-relation queries the response was YES. [2024-06-27 19:34:18,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43345 conditions, 5095 events. 2955/5095 cut-off events. For 1003940/1003940 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 35123 event pairs, 1067 based on Foata normal form. 6/5096 useless extension candidates. Maximal degree in co-relation 43209. Up to 4264 conditions per place. [2024-06-27 19:34:18,844 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 250 selfloop transitions, 51 changer transitions 0/308 dead transitions. [2024-06-27 19:34:18,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 308 transitions, 4057 flow [2024-06-27 19:34:18,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:18,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:18,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:34:18,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314102564102564 [2024-06-27 19:34:18,845 INFO L175 Difference]: Start difference. First operand has 290 places, 268 transitions, 3335 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:34:18,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 308 transitions, 4057 flow [2024-06-27 19:34:21,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 308 transitions, 3921 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 19:34:21,769 INFO L231 Difference]: Finished difference. Result has 290 places, 268 transitions, 3309 flow [2024-06-27 19:34:21,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3199, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3309, PETRI_PLACES=290, PETRI_TRANSITIONS=268} [2024-06-27 19:34:21,770 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 250 predicate places. [2024-06-27 19:34:21,770 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 268 transitions, 3309 flow [2024-06-27 19:34:21,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:21,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:21,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:21,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 19:34:21,770 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)] === [2024-06-27 19:34:21,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:21,771 INFO L85 PathProgramCache]: Analyzing trace with hash -117214483, now seen corresponding path program 7 times [2024-06-27 19:34:21,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:21,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344761765] [2024-06-27 19:34:21,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:21,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:21,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:21,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344761765] [2024-06-27 19:34:21,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344761765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:21,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:21,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:21,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424929847] [2024-06-27 19:34:21,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:21,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:21,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:21,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:21,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:21,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:34:21,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 268 transitions, 3309 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:21,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:21,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:34:21,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:22,676 INFO L124 PetriNetUnfolderBase]: 3087/5299 cut-off events. [2024-06-27 19:34:22,676 INFO L125 PetriNetUnfolderBase]: For 1113657/1113660 co-relation queries the response was YES. [2024-06-27 19:34:22,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46851 conditions, 5299 events. 3087/5299 cut-off events. For 1113657/1113660 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 36952 event pairs, 1265 based on Foata normal form. 7/5304 useless extension candidates. Maximal degree in co-relation 46714. Up to 4485 conditions per place. [2024-06-27 19:34:22,734 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 170 selfloop transitions, 125 changer transitions 0/302 dead transitions. [2024-06-27 19:34:22,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 302 transitions, 4281 flow [2024-06-27 19:34:22,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:22,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:22,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 19:34:22,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6089743589743589 [2024-06-27 19:34:22,735 INFO L175 Difference]: Start difference. First operand has 290 places, 268 transitions, 3309 flow. Second operand 8 states and 190 transitions. [2024-06-27 19:34:22,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 302 transitions, 4281 flow [2024-06-27 19:34:25,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 302 transitions, 4186 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 19:34:25,420 INFO L231 Difference]: Finished difference. Result has 291 places, 272 transitions, 3606 flow [2024-06-27 19:34:25,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3218, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3606, PETRI_PLACES=291, PETRI_TRANSITIONS=272} [2024-06-27 19:34:25,421 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 251 predicate places. [2024-06-27 19:34:25,421 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 272 transitions, 3606 flow [2024-06-27 19:34:25,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:25,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:25,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:25,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 19:34:25,422 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)] === [2024-06-27 19:34:25,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:25,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1773285408, now seen corresponding path program 5 times [2024-06-27 19:34:25,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:25,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723279590] [2024-06-27 19:34:25,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:25,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:25,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:25,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723279590] [2024-06-27 19:34:25,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723279590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:25,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:25,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:25,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823011186] [2024-06-27 19:34:25,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:25,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:25,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:25,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:25,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:25,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:34:25,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 272 transitions, 3606 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:25,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:25,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:34:25,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:26,364 INFO L124 PetriNetUnfolderBase]: 3107/5339 cut-off events. [2024-06-27 19:34:26,364 INFO L125 PetriNetUnfolderBase]: For 1093310/1093313 co-relation queries the response was YES. [2024-06-27 19:34:26,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47071 conditions, 5339 events. 3107/5339 cut-off events. For 1093310/1093313 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 37468 event pairs, 1259 based on Foata normal form. 7/5340 useless extension candidates. Maximal degree in co-relation 46934. Up to 4781 conditions per place. [2024-06-27 19:34:26,421 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 228 selfloop transitions, 64 changer transitions 0/299 dead transitions. [2024-06-27 19:34:26,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 299 transitions, 4274 flow [2024-06-27 19:34:26,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:26,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:26,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 19:34:26,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865384615384616 [2024-06-27 19:34:26,422 INFO L175 Difference]: Start difference. First operand has 291 places, 272 transitions, 3606 flow. Second operand 8 states and 183 transitions. [2024-06-27 19:34:26,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 299 transitions, 4274 flow [2024-06-27 19:34:28,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 299 transitions, 4099 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 19:34:28,317 INFO L231 Difference]: Finished difference. Result has 295 places, 273 transitions, 3581 flow [2024-06-27 19:34:28,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3431, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3581, PETRI_PLACES=295, PETRI_TRANSITIONS=273} [2024-06-27 19:34:28,318 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 255 predicate places. [2024-06-27 19:34:28,318 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 273 transitions, 3581 flow [2024-06-27 19:34:28,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:28,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:28,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:28,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 19:34:28,318 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)] === [2024-06-27 19:34:28,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:28,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1654392361, now seen corresponding path program 8 times [2024-06-27 19:34:28,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:28,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50221263] [2024-06-27 19:34:28,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:28,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:28,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:28,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50221263] [2024-06-27 19:34:28,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50221263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:28,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:28,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:28,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199046282] [2024-06-27 19:34:28,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:28,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:28,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:28,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:28,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:28,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:34:28,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 273 transitions, 3581 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:28,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:28,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:34:28,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:29,350 INFO L124 PetriNetUnfolderBase]: 3173/5455 cut-off events. [2024-06-27 19:34:29,350 INFO L125 PetriNetUnfolderBase]: For 1149601/1149604 co-relation queries the response was YES. [2024-06-27 19:34:29,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48722 conditions, 5455 events. 3173/5455 cut-off events. For 1149601/1149604 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 38341 event pairs, 1307 based on Foata normal form. 7/5460 useless extension candidates. Maximal degree in co-relation 48583. Up to 4777 conditions per place. [2024-06-27 19:34:29,400 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 175 selfloop transitions, 119 changer transitions 0/301 dead transitions. [2024-06-27 19:34:29,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 301 transitions, 4489 flow [2024-06-27 19:34:29,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:29,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:29,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 19:34:29,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993589743589743 [2024-06-27 19:34:29,401 INFO L175 Difference]: Start difference. First operand has 295 places, 273 transitions, 3581 flow. Second operand 8 states and 187 transitions. [2024-06-27 19:34:29,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 301 transitions, 4489 flow [2024-06-27 19:34:31,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 301 transitions, 4353 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:31,620 INFO L231 Difference]: Finished difference. Result has 297 places, 275 transitions, 3743 flow [2024-06-27 19:34:31,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3445, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3743, PETRI_PLACES=297, PETRI_TRANSITIONS=275} [2024-06-27 19:34:31,620 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 257 predicate places. [2024-06-27 19:34:31,620 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 275 transitions, 3743 flow [2024-06-27 19:34:31,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:31,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:31,621 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] [2024-06-27 19:34:31,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 19:34:31,621 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)] === [2024-06-27 19:34:31,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:31,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1654392702, now seen corresponding path program 6 times [2024-06-27 19:34:31,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:31,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133997067] [2024-06-27 19:34:31,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:31,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:31,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:31,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133997067] [2024-06-27 19:34:31,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133997067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:31,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:31,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:31,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412269840] [2024-06-27 19:34:31,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:31,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:31,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:31,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:31,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:31,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:34:31,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 275 transitions, 3743 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:31,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:31,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:34:31,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:32,584 INFO L124 PetriNetUnfolderBase]: 3193/5484 cut-off events. [2024-06-27 19:34:32,584 INFO L125 PetriNetUnfolderBase]: For 1175919/1175922 co-relation queries the response was YES. [2024-06-27 19:34:32,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49256 conditions, 5484 events. 3193/5484 cut-off events. For 1175919/1175922 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 38564 event pairs, 1288 based on Foata normal form. 7/5487 useless extension candidates. Maximal degree in co-relation 49116. Up to 4921 conditions per place. [2024-06-27 19:34:32,646 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 237 selfloop transitions, 58 changer transitions 0/302 dead transitions. [2024-06-27 19:34:32,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 302 transitions, 4431 flow [2024-06-27 19:34:32,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:34:32,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:34:32,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-27 19:34:32,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698005698005698 [2024-06-27 19:34:32,647 INFO L175 Difference]: Start difference. First operand has 297 places, 275 transitions, 3743 flow. Second operand 9 states and 200 transitions. [2024-06-27 19:34:32,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 302 transitions, 4431 flow [2024-06-27 19:34:35,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 302 transitions, 4265 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 19:34:35,410 INFO L231 Difference]: Finished difference. Result has 302 places, 276 transitions, 3717 flow [2024-06-27 19:34:35,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3577, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3717, PETRI_PLACES=302, PETRI_TRANSITIONS=276} [2024-06-27 19:34:35,410 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 262 predicate places. [2024-06-27 19:34:35,410 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 276 transitions, 3717 flow [2024-06-27 19:34:35,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:35,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:35,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:35,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 19:34:35,410 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)] === [2024-06-27 19:34:35,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:35,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1654244491, now seen corresponding path program 9 times [2024-06-27 19:34:35,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:35,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565310939] [2024-06-27 19:34:35,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:35,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:35,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:35,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565310939] [2024-06-27 19:34:35,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565310939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:35,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:35,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:35,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420846637] [2024-06-27 19:34:35,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:35,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:35,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:35,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:35,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:35,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:34:35,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 276 transitions, 3717 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:35,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:35,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:34:35,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:36,332 INFO L124 PetriNetUnfolderBase]: 3175/5467 cut-off events. [2024-06-27 19:34:36,333 INFO L125 PetriNetUnfolderBase]: For 1172685/1172688 co-relation queries the response was YES. [2024-06-27 19:34:36,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48592 conditions, 5467 events. 3175/5467 cut-off events. For 1172685/1172688 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 38524 event pairs, 1313 based on Foata normal form. 9/5474 useless extension candidates. Maximal degree in co-relation 48450. Up to 4831 conditions per place. [2024-06-27 19:34:36,388 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 174 selfloop transitions, 117 changer transitions 0/298 dead transitions. [2024-06-27 19:34:36,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 298 transitions, 4367 flow [2024-06-27 19:34:36,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:36,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 19:34:36,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865384615384616 [2024-06-27 19:34:36,389 INFO L175 Difference]: Start difference. First operand has 302 places, 276 transitions, 3717 flow. Second operand 8 states and 183 transitions. [2024-06-27 19:34:36,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 298 transitions, 4367 flow [2024-06-27 19:34:39,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 298 transitions, 4227 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 19:34:39,257 INFO L231 Difference]: Finished difference. Result has 303 places, 276 transitions, 3816 flow [2024-06-27 19:34:39,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3577, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3816, PETRI_PLACES=303, PETRI_TRANSITIONS=276} [2024-06-27 19:34:39,257 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 263 predicate places. [2024-06-27 19:34:39,257 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 276 transitions, 3816 flow [2024-06-27 19:34:39,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:39,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:39,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:39,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 19:34:39,257 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)] === [2024-06-27 19:34:39,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:39,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1798089124, now seen corresponding path program 7 times [2024-06-27 19:34:39,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:39,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239858658] [2024-06-27 19:34:39,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:39,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:39,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:39,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239858658] [2024-06-27 19:34:39,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239858658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:39,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:39,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:39,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286690154] [2024-06-27 19:34:39,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:39,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:39,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:39,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:39,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:39,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:34:39,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 276 transitions, 3816 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:39,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:39,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:34:39,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:40,173 INFO L124 PetriNetUnfolderBase]: 3195/5509 cut-off events. [2024-06-27 19:34:40,173 INFO L125 PetriNetUnfolderBase]: For 1185975/1185978 co-relation queries the response was YES. [2024-06-27 19:34:40,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48957 conditions, 5509 events. 3195/5509 cut-off events. For 1185975/1185978 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 38391 event pairs, 1042 based on Foata normal form. 7/5512 useless extension candidates. Maximal degree in co-relation 48814. Up to 3929 conditions per place. [2024-06-27 19:34:40,231 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 211 selfloop transitions, 89 changer transitions 0/307 dead transitions. [2024-06-27 19:34:40,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 307 transitions, 4900 flow [2024-06-27 19:34:40,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:40,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:40,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:34:40,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608058608058608 [2024-06-27 19:34:40,232 INFO L175 Difference]: Start difference. First operand has 303 places, 276 transitions, 3816 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:34:40,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 307 transitions, 4900 flow [2024-06-27 19:34:44,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 307 transitions, 4661 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 19:34:44,334 INFO L231 Difference]: Finished difference. Result has 303 places, 277 transitions, 3773 flow [2024-06-27 19:34:44,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3577, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3773, PETRI_PLACES=303, PETRI_TRANSITIONS=277} [2024-06-27 19:34:44,334 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 263 predicate places. [2024-06-27 19:34:44,334 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 277 transitions, 3773 flow [2024-06-27 19:34:44,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:44,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:44,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:44,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 19:34:44,335 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)] === [2024-06-27 19:34:44,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:44,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2063405408, now seen corresponding path program 8 times [2024-06-27 19:34:44,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:44,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792565873] [2024-06-27 19:34:44,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:44,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:44,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:44,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792565873] [2024-06-27 19:34:44,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792565873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:44,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:44,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:44,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877452382] [2024-06-27 19:34:44,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:44,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:44,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:44,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:44,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:44,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:34:44,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 277 transitions, 3773 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:44,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:44,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:34:44,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:45,329 INFO L124 PetriNetUnfolderBase]: 3215/5541 cut-off events. [2024-06-27 19:34:45,330 INFO L125 PetriNetUnfolderBase]: For 1214019/1214022 co-relation queries the response was YES. [2024-06-27 19:34:45,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49601 conditions, 5541 events. 3215/5541 cut-off events. For 1214019/1214022 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 39144 event pairs, 1096 based on Foata normal form. 7/5546 useless extension candidates. Maximal degree in co-relation 49457. Up to 4752 conditions per place. [2024-06-27 19:34:45,388 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 214 selfloop transitions, 87 changer transitions 0/308 dead transitions. [2024-06-27 19:34:45,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 308 transitions, 4481 flow [2024-06-27 19:34:45,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:45,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:45,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 19:34:45,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993589743589743 [2024-06-27 19:34:45,389 INFO L175 Difference]: Start difference. First operand has 303 places, 277 transitions, 3773 flow. Second operand 8 states and 187 transitions. [2024-06-27 19:34:45,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 308 transitions, 4481 flow [2024-06-27 19:34:49,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 308 transitions, 4238 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 19:34:49,678 INFO L231 Difference]: Finished difference. Result has 306 places, 278 transitions, 3726 flow [2024-06-27 19:34:49,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3539, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3726, PETRI_PLACES=306, PETRI_TRANSITIONS=278} [2024-06-27 19:34:49,678 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 266 predicate places. [2024-06-27 19:34:49,679 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 278 transitions, 3726 flow [2024-06-27 19:34:49,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:49,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:49,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:49,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 19:34:49,679 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)] === [2024-06-27 19:34:49,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:49,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1883263447, now seen corresponding path program 10 times [2024-06-27 19:34:49,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:49,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811559455] [2024-06-27 19:34:49,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:49,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:49,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:49,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811559455] [2024-06-27 19:34:49,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811559455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:49,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:49,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:49,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325884602] [2024-06-27 19:34:49,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:49,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:49,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:49,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:49,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:49,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:34:49,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 278 transitions, 3726 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:49,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:49,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:34:49,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:50,628 INFO L124 PetriNetUnfolderBase]: 3268/5588 cut-off events. [2024-06-27 19:34:50,628 INFO L125 PetriNetUnfolderBase]: For 1265353/1265356 co-relation queries the response was YES. [2024-06-27 19:34:50,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50328 conditions, 5588 events. 3268/5588 cut-off events. For 1265353/1265356 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 39017 event pairs, 1069 based on Foata normal form. 7/5593 useless extension candidates. Maximal degree in co-relation 50184. Up to 3301 conditions per place. [2024-06-27 19:34:50,686 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 160 selfloop transitions, 150 changer transitions 0/317 dead transitions. [2024-06-27 19:34:50,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 317 transitions, 4914 flow [2024-06-27 19:34:50,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:50,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:34:50,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2024-06-27 19:34:50,687 INFO L175 Difference]: Start difference. First operand has 306 places, 278 transitions, 3726 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:34:50,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 317 transitions, 4914 flow [2024-06-27 19:34:55,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 317 transitions, 4740 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:55,029 INFO L231 Difference]: Finished difference. Result has 309 places, 280 transitions, 3927 flow [2024-06-27 19:34:55,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3552, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3927, PETRI_PLACES=309, PETRI_TRANSITIONS=280} [2024-06-27 19:34:55,029 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 269 predicate places. [2024-06-27 19:34:55,029 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 280 transitions, 3927 flow [2024-06-27 19:34:55,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:55,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:55,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:55,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 19:34:55,030 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)] === [2024-06-27 19:34:55,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:55,030 INFO L85 PathProgramCache]: Analyzing trace with hash -2086576779, now seen corresponding path program 11 times [2024-06-27 19:34:55,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:55,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313334400] [2024-06-27 19:34:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:55,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:55,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:55,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313334400] [2024-06-27 19:34:55,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313334400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:55,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:55,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:55,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835254226] [2024-06-27 19:34:55,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:55,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:55,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:55,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:55,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:55,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:34:55,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 280 transitions, 3927 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:55,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:55,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:34:55,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:56,044 INFO L124 PetriNetUnfolderBase]: 3288/5666 cut-off events. [2024-06-27 19:34:56,044 INFO L125 PetriNetUnfolderBase]: For 1296641/1296641 co-relation queries the response was YES. [2024-06-27 19:34:56,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51380 conditions, 5666 events. 3288/5666 cut-off events. For 1296641/1296641 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 40248 event pairs, 1193 based on Foata normal form. 6/5671 useless extension candidates. Maximal degree in co-relation 51234. Up to 5035 conditions per place. [2024-06-27 19:34:56,109 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 272 selfloop transitions, 31 changer transitions 0/310 dead transitions. [2024-06-27 19:34:56,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 310 transitions, 4664 flow [2024-06-27 19:34:56,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:56,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:56,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-27 19:34:56,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-27 19:34:56,110 INFO L175 Difference]: Start difference. First operand has 309 places, 280 transitions, 3927 flow. Second operand 8 states and 180 transitions. [2024-06-27 19:34:56,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 310 transitions, 4664 flow [2024-06-27 19:35:00,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 310 transitions, 4177 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 19:35:00,488 INFO L231 Difference]: Finished difference. Result has 310 places, 281 transitions, 3541 flow [2024-06-27 19:35:00,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3449, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3541, PETRI_PLACES=310, PETRI_TRANSITIONS=281} [2024-06-27 19:35:00,489 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 270 predicate places. [2024-06-27 19:35:00,489 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 281 transitions, 3541 flow [2024-06-27 19:35:00,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:00,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:00,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:00,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 19:35:00,490 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)] === [2024-06-27 19:35:00,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:00,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1892517877, now seen corresponding path program 12 times [2024-06-27 19:35:00,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:00,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425182911] [2024-06-27 19:35:00,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:00,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:00,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:00,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425182911] [2024-06-27 19:35:00,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425182911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:00,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:00,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:00,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004869836] [2024-06-27 19:35:00,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:00,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:00,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:00,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:00,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:00,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:35:00,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 281 transitions, 3541 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:00,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:00,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:35:00,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:01,489 INFO L124 PetriNetUnfolderBase]: 3308/5663 cut-off events. [2024-06-27 19:35:01,490 INFO L125 PetriNetUnfolderBase]: For 1317462/1317465 co-relation queries the response was YES. [2024-06-27 19:35:01,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50490 conditions, 5663 events. 3308/5663 cut-off events. For 1317462/1317465 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 39784 event pairs, 1107 based on Foata normal form. 7/5668 useless extension candidates. Maximal degree in co-relation 50345. Up to 3325 conditions per place. [2024-06-27 19:35:01,551 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 160 selfloop transitions, 149 changer transitions 0/316 dead transitions. [2024-06-27 19:35:01,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 316 transitions, 4503 flow [2024-06-27 19:35:01,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:01,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:01,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 19:35:01,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6185897435897436 [2024-06-27 19:35:01,552 INFO L175 Difference]: Start difference. First operand has 310 places, 281 transitions, 3541 flow. Second operand 8 states and 193 transitions. [2024-06-27 19:35:01,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 316 transitions, 4503 flow [2024-06-27 19:35:06,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 316 transitions, 4369 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 19:35:06,309 INFO L231 Difference]: Finished difference. Result has 311 places, 282 transitions, 3735 flow [2024-06-27 19:35:06,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3407, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3735, PETRI_PLACES=311, PETRI_TRANSITIONS=282} [2024-06-27 19:35:06,309 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 271 predicate places. [2024-06-27 19:35:06,310 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 282 transitions, 3735 flow [2024-06-27 19:35:06,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:06,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:06,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:06,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 19:35:06,310 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)] === [2024-06-27 19:35:06,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:06,310 INFO L85 PathProgramCache]: Analyzing trace with hash -2086963070, now seen corresponding path program 9 times [2024-06-27 19:35:06,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:06,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333039464] [2024-06-27 19:35:06,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:06,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:06,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:06,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:06,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333039464] [2024-06-27 19:35:06,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333039464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:06,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:06,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:06,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414893912] [2024-06-27 19:35:06,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:06,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:06,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:06,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:06,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:06,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:35:06,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 282 transitions, 3735 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:06,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:06,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:35:06,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:07,338 INFO L124 PetriNetUnfolderBase]: 3328/5726 cut-off events. [2024-06-27 19:35:07,338 INFO L125 PetriNetUnfolderBase]: For 1346018/1346021 co-relation queries the response was YES. [2024-06-27 19:35:07,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51269 conditions, 5726 events. 3328/5726 cut-off events. For 1346018/1346021 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 40596 event pairs, 1141 based on Foata normal form. 7/5729 useless extension candidates. Maximal degree in co-relation 51123. Up to 4859 conditions per place. [2024-06-27 19:35:07,396 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 217 selfloop transitions, 90 changer transitions 0/314 dead transitions. [2024-06-27 19:35:07,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 314 transitions, 4454 flow [2024-06-27 19:35:07,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:35:07,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:35:07,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 19:35:07,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5783475783475783 [2024-06-27 19:35:07,398 INFO L175 Difference]: Start difference. First operand has 311 places, 282 transitions, 3735 flow. Second operand 9 states and 203 transitions. [2024-06-27 19:35:07,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 314 transitions, 4454 flow [2024-06-27 19:35:11,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 314 transitions, 4211 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:35:11,835 INFO L231 Difference]: Finished difference. Result has 315 places, 283 transitions, 3687 flow [2024-06-27 19:35:11,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3492, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3687, PETRI_PLACES=315, PETRI_TRANSITIONS=283} [2024-06-27 19:35:11,835 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 275 predicate places. [2024-06-27 19:35:11,835 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 283 transitions, 3687 flow [2024-06-27 19:35:11,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:11,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:11,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:11,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 19:35:11,836 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)] === [2024-06-27 19:35:11,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:11,836 INFO L85 PathProgramCache]: Analyzing trace with hash -296162639, now seen corresponding path program 13 times [2024-06-27 19:35:11,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:11,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833335049] [2024-06-27 19:35:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:11,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:11,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:11,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833335049] [2024-06-27 19:35:11,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833335049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:11,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:11,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:11,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251673980] [2024-06-27 19:35:11,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:11,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:11,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:11,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:11,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:11,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:35:11,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 283 transitions, 3687 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:11,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:11,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:35:11,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:13,121 INFO L124 PetriNetUnfolderBase]: 3356/5770 cut-off events. [2024-06-27 19:35:13,121 INFO L125 PetriNetUnfolderBase]: For 1383484/1383484 co-relation queries the response was YES. [2024-06-27 19:35:13,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51569 conditions, 5770 events. 3356/5770 cut-off events. For 1383484/1383484 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 40970 event pairs, 1347 based on Foata normal form. 8/5777 useless extension candidates. Maximal degree in co-relation 51422. Up to 5294 conditions per place. [2024-06-27 19:35:13,193 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 270 selfloop transitions, 26 changer transitions 0/303 dead transitions. [2024-06-27 19:35:13,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 303 transitions, 4368 flow [2024-06-27 19:35:13,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:13,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-27 19:35:13,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-27 19:35:13,194 INFO L175 Difference]: Start difference. First operand has 315 places, 283 transitions, 3687 flow. Second operand 8 states and 173 transitions. [2024-06-27 19:35:13,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 303 transitions, 4368 flow [2024-06-27 19:35:17,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 303 transitions, 4186 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:35:17,769 INFO L231 Difference]: Finished difference. Result has 316 places, 284 transitions, 3593 flow [2024-06-27 19:35:17,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3505, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3593, PETRI_PLACES=316, PETRI_TRANSITIONS=284} [2024-06-27 19:35:17,770 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 276 predicate places. [2024-06-27 19:35:17,770 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 284 transitions, 3593 flow [2024-06-27 19:35:17,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:17,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:17,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:17,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 19:35:17,770 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)] === [2024-06-27 19:35:17,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:17,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1552792435, now seen corresponding path program 14 times [2024-06-27 19:35:17,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:17,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739342754] [2024-06-27 19:35:17,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:17,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:17,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:17,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739342754] [2024-06-27 19:35:17,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739342754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:17,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:17,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:17,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21234496] [2024-06-27 19:35:17,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:17,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:17,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:17,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:17,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:17,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:35:17,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 284 transitions, 3593 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:17,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:17,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:35:17,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:18,764 INFO L124 PetriNetUnfolderBase]: 3409/5859 cut-off events. [2024-06-27 19:35:18,764 INFO L125 PetriNetUnfolderBase]: For 1432863/1432866 co-relation queries the response was YES. [2024-06-27 19:35:18,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52808 conditions, 5859 events. 3409/5859 cut-off events. For 1432863/1432866 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 41735 event pairs, 1401 based on Foata normal form. 7/5864 useless extension candidates. Maximal degree in co-relation 52660. Up to 5121 conditions per place. [2024-06-27 19:35:18,826 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 183 selfloop transitions, 119 changer transitions 0/309 dead transitions. [2024-06-27 19:35:18,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 309 transitions, 4537 flow [2024-06-27 19:35:18,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:18,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:18,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 19:35:18,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865384615384616 [2024-06-27 19:35:18,827 INFO L175 Difference]: Start difference. First operand has 316 places, 284 transitions, 3593 flow. Second operand 8 states and 183 transitions. [2024-06-27 19:35:18,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 309 transitions, 4537 flow [2024-06-27 19:35:24,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 309 transitions, 4466 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 19:35:24,026 INFO L231 Difference]: Finished difference. Result has 318 places, 286 transitions, 3828 flow [2024-06-27 19:35:24,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3522, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3828, PETRI_PLACES=318, PETRI_TRANSITIONS=286} [2024-06-27 19:35:24,027 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 278 predicate places. [2024-06-27 19:35:24,027 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 286 transitions, 3828 flow [2024-06-27 19:35:24,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:24,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:24,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:24,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 19:35:24,028 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)] === [2024-06-27 19:35:24,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:24,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1184326517, now seen corresponding path program 15 times [2024-06-27 19:35:24,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:24,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316921321] [2024-06-27 19:35:24,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:24,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:24,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:24,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316921321] [2024-06-27 19:35:24,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316921321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:24,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:24,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:24,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848132731] [2024-06-27 19:35:24,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:24,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:24,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:24,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:24,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:24,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:35:24,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 286 transitions, 3828 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:24,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:24,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:35:24,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:25,167 INFO L124 PetriNetUnfolderBase]: 3391/5823 cut-off events. [2024-06-27 19:35:25,168 INFO L125 PetriNetUnfolderBase]: For 1429561/1429564 co-relation queries the response was YES. [2024-06-27 19:35:25,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52163 conditions, 5823 events. 3391/5823 cut-off events. For 1429561/1429564 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 41370 event pairs, 1391 based on Foata normal form. 9/5830 useless extension candidates. Maximal degree in co-relation 52014. Up to 5175 conditions per place. [2024-06-27 19:35:25,242 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 182 selfloop transitions, 116 changer transitions 0/305 dead transitions. [2024-06-27 19:35:25,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 305 transitions, 4484 flow [2024-06-27 19:35:25,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:25,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:25,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-27 19:35:25,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-27 19:35:25,242 INFO L175 Difference]: Start difference. First operand has 318 places, 286 transitions, 3828 flow. Second operand 8 states and 180 transitions. [2024-06-27 19:35:25,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 305 transitions, 4484 flow [2024-06-27 19:35:29,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 305 transitions, 4300 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 19:35:29,454 INFO L231 Difference]: Finished difference. Result has 322 places, 286 transitions, 3881 flow [2024-06-27 19:35:29,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3644, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3881, PETRI_PLACES=322, PETRI_TRANSITIONS=286} [2024-06-27 19:35:29,454 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 282 predicate places. [2024-06-27 19:35:29,455 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 286 transitions, 3881 flow [2024-06-27 19:35:29,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:29,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:29,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:29,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 19:35:29,455 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)] === [2024-06-27 19:35:29,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:29,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1562843027, now seen corresponding path program 16 times [2024-06-27 19:35:29,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:29,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433256436] [2024-06-27 19:35:29,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:29,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:29,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:29,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433256436] [2024-06-27 19:35:29,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433256436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:29,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:29,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:29,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515115551] [2024-06-27 19:35:29,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:29,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:29,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:29,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:29,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:29,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:35:29,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 286 transitions, 3881 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:29,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:29,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:35:29,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:30,521 INFO L124 PetriNetUnfolderBase]: 3426/5892 cut-off events. [2024-06-27 19:35:30,522 INFO L125 PetriNetUnfolderBase]: For 1442838/1442838 co-relation queries the response was YES. [2024-06-27 19:35:30,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52482 conditions, 5892 events. 3426/5892 cut-off events. For 1442838/1442838 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 42040 event pairs, 1359 based on Foata normal form. 8/5899 useless extension candidates. Maximal degree in co-relation 52331. Up to 5332 conditions per place. [2024-06-27 19:35:30,724 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 277 selfloop transitions, 28 changer transitions 0/312 dead transitions. [2024-06-27 19:35:30,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 312 transitions, 4616 flow [2024-06-27 19:35:30,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:35:30,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:35:30,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-27 19:35:30,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527065527065527 [2024-06-27 19:35:30,725 INFO L175 Difference]: Start difference. First operand has 322 places, 286 transitions, 3881 flow. Second operand 9 states and 194 transitions. [2024-06-27 19:35:30,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 312 transitions, 4616 flow [2024-06-27 19:35:37,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 312 transitions, 4374 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:35:37,430 INFO L231 Difference]: Finished difference. Result has 325 places, 288 transitions, 3748 flow [2024-06-27 19:35:37,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3639, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3748, PETRI_PLACES=325, PETRI_TRANSITIONS=288} [2024-06-27 19:35:37,431 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 285 predicate places. [2024-06-27 19:35:37,431 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 288 transitions, 3748 flow [2024-06-27 19:35:37,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:37,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:37,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:37,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 19:35:37,431 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)] === [2024-06-27 19:35:37,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:37,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1184178306, now seen corresponding path program 10 times [2024-06-27 19:35:37,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:37,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059311346] [2024-06-27 19:35:37,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:37,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:37,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:37,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059311346] [2024-06-27 19:35:37,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059311346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:37,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:37,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:37,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463526998] [2024-06-27 19:35:37,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:37,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:37,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:37,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:37,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:37,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:35:37,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 288 transitions, 3748 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:37,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:37,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:35:37,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:38,612 INFO L124 PetriNetUnfolderBase]: 3413/5882 cut-off events. [2024-06-27 19:35:38,612 INFO L125 PetriNetUnfolderBase]: For 1427800/1427803 co-relation queries the response was YES. [2024-06-27 19:35:38,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51907 conditions, 5882 events. 3413/5882 cut-off events. For 1427800/1427803 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 42038 event pairs, 1388 based on Foata normal form. 7/5885 useless extension candidates. Maximal degree in co-relation 51754. Up to 5277 conditions per place. [2024-06-27 19:35:38,687 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 247 selfloop transitions, 58 changer transitions 0/312 dead transitions. [2024-06-27 19:35:38,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 312 transitions, 4432 flow [2024-06-27 19:35:38,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:35:38,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:35:38,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-27 19:35:38,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5461538461538461 [2024-06-27 19:35:38,688 INFO L175 Difference]: Start difference. First operand has 325 places, 288 transitions, 3748 flow. Second operand 10 states and 213 transitions. [2024-06-27 19:35:38,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 312 transitions, 4432 flow [2024-06-27 19:35:44,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 312 transitions, 4360 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 19:35:44,770 INFO L231 Difference]: Finished difference. Result has 329 places, 288 transitions, 3796 flow [2024-06-27 19:35:44,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3676, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3796, PETRI_PLACES=329, PETRI_TRANSITIONS=288} [2024-06-27 19:35:44,770 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 289 predicate places. [2024-06-27 19:35:44,770 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 288 transitions, 3796 flow [2024-06-27 19:35:44,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:44,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:44,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:44,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 19:35:44,771 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)] === [2024-06-27 19:35:44,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:44,771 INFO L85 PathProgramCache]: Analyzing trace with hash -430647149, now seen corresponding path program 17 times [2024-06-27 19:35:44,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:44,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042920638] [2024-06-27 19:35:44,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:44,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:44,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:44,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042920638] [2024-06-27 19:35:44,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042920638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:44,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:44,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:44,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205228411] [2024-06-27 19:35:44,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:44,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:44,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:44,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:44,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:44,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:35:44,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 288 transitions, 3796 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:44,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:44,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:35:44,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:45,862 INFO L124 PetriNetUnfolderBase]: 3433/5909 cut-off events. [2024-06-27 19:35:45,862 INFO L125 PetriNetUnfolderBase]: For 1454993/1454993 co-relation queries the response was YES. [2024-06-27 19:35:45,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52295 conditions, 5909 events. 3433/5909 cut-off events. For 1454993/1454993 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 42310 event pairs, 1340 based on Foata normal form. 6/5914 useless extension candidates. Maximal degree in co-relation 52141. Up to 5362 conditions per place. [2024-06-27 19:35:45,928 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 281 selfloop transitions, 26 changer transitions 0/314 dead transitions. [2024-06-27 19:35:45,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 314 transitions, 4527 flow [2024-06-27 19:35:45,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:45,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:45,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-27 19:35:45,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673076923076923 [2024-06-27 19:35:45,928 INFO L175 Difference]: Start difference. First operand has 329 places, 288 transitions, 3796 flow. Second operand 8 states and 177 transitions. [2024-06-27 19:35:45,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 314 transitions, 4527 flow [2024-06-27 19:35:51,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 314 transitions, 4370 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-27 19:35:51,524 INFO L231 Difference]: Finished difference. Result has 327 places, 289 transitions, 3726 flow [2024-06-27 19:35:51,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3639, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3726, PETRI_PLACES=327, PETRI_TRANSITIONS=289} [2024-06-27 19:35:51,524 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 287 predicate places. [2024-06-27 19:35:51,524 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 289 transitions, 3726 flow [2024-06-27 19:35:51,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:51,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:51,524 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] [2024-06-27 19:35:51,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 19:35:51,524 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)] === [2024-06-27 19:35:51,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:51,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1420353666, now seen corresponding path program 11 times [2024-06-27 19:35:51,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:51,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930199794] [2024-06-27 19:35:51,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:51,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:51,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:51,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930199794] [2024-06-27 19:35:51,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930199794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:51,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:51,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:51,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767801346] [2024-06-27 19:35:51,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:51,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:51,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:51,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:51,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:51,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:35:51,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 289 transitions, 3726 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:51,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:51,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:35:51,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:52,585 INFO L124 PetriNetUnfolderBase]: 3420/5891 cut-off events. [2024-06-27 19:35:52,585 INFO L125 PetriNetUnfolderBase]: For 1449356/1449359 co-relation queries the response was YES. [2024-06-27 19:35:52,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51596 conditions, 5891 events. 3420/5891 cut-off events. For 1449356/1449359 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 42162 event pairs, 1377 based on Foata normal form. 7/5886 useless extension candidates. Maximal degree in co-relation 51443. Up to 5128 conditions per place. [2024-06-27 19:35:52,648 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 239 selfloop transitions, 67 changer transitions 0/313 dead transitions. [2024-06-27 19:35:52,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 313 transitions, 4412 flow [2024-06-27 19:35:52,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:35:52,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:35:52,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-27 19:35:52,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584045584045584 [2024-06-27 19:35:52,649 INFO L175 Difference]: Start difference. First operand has 327 places, 289 transitions, 3726 flow. Second operand 9 states and 196 transitions. [2024-06-27 19:35:52,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 313 transitions, 4412 flow [2024-06-27 19:35:57,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 313 transitions, 4328 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 19:35:57,715 INFO L231 Difference]: Finished difference. Result has 330 places, 289 transitions, 3780 flow [2024-06-27 19:35:57,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3780, PETRI_PLACES=330, PETRI_TRANSITIONS=289} [2024-06-27 19:35:57,715 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 290 predicate places. [2024-06-27 19:35:57,716 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 289 transitions, 3780 flow [2024-06-27 19:35:57,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:57,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:57,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:57,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 19:35:57,716 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)] === [2024-06-27 19:35:57,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:57,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1420354007, now seen corresponding path program 18 times [2024-06-27 19:35:57,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:57,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137376899] [2024-06-27 19:35:57,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:57,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:57,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:57,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:57,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137376899] [2024-06-27 19:35:57,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137376899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:57,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:57,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:57,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206722677] [2024-06-27 19:35:57,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:57,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:57,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:57,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:57,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:57,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:35:57,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 289 transitions, 3780 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:57,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:57,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:35:57,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:58,838 INFO L124 PetriNetUnfolderBase]: 3440/5904 cut-off events. [2024-06-27 19:35:58,838 INFO L125 PetriNetUnfolderBase]: For 1475798/1475801 co-relation queries the response was YES. [2024-06-27 19:35:58,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52053 conditions, 5904 events. 3440/5904 cut-off events. For 1475798/1475801 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 42096 event pairs, 1370 based on Foata normal form. 7/5909 useless extension candidates. Maximal degree in co-relation 51900. Up to 4902 conditions per place. [2024-06-27 19:35:58,896 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 179 selfloop transitions, 130 changer transitions 0/316 dead transitions. [2024-06-27 19:35:58,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 316 transitions, 4527 flow [2024-06-27 19:35:58,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:58,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:58,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 19:35:58,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592948717948718 [2024-06-27 19:35:58,897 INFO L175 Difference]: Start difference. First operand has 330 places, 289 transitions, 3780 flow. Second operand 8 states and 185 transitions. [2024-06-27 19:35:58,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 316 transitions, 4527 flow [2024-06-27 19:36:03,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 316 transitions, 4389 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 19:36:03,804 INFO L231 Difference]: Finished difference. Result has 331 places, 290 transitions, 3939 flow [2024-06-27 19:36:03,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3939, PETRI_PLACES=331, PETRI_TRANSITIONS=290} [2024-06-27 19:36:03,804 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 291 predicate places. [2024-06-27 19:36:03,804 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 290 transitions, 3939 flow [2024-06-27 19:36:03,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:03,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:03,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:03,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 19:36:03,804 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)] === [2024-06-27 19:36:03,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:03,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1889716145, now seen corresponding path program 19 times [2024-06-27 19:36:03,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:03,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769432436] [2024-06-27 19:36:03,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:03,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:03,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:03,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769432436] [2024-06-27 19:36:03,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769432436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:03,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:03,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:36:03,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531553912] [2024-06-27 19:36:03,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:03,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:36:03,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:03,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:36:03,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:36:03,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:36:03,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 290 transitions, 3939 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:03,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:03,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:36:03,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:04,880 INFO L124 PetriNetUnfolderBase]: 3476/5980 cut-off events. [2024-06-27 19:36:04,881 INFO L125 PetriNetUnfolderBase]: For 1516637/1516637 co-relation queries the response was YES. [2024-06-27 19:36:04,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52948 conditions, 5980 events. 3476/5980 cut-off events. For 1516637/1516637 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 42768 event pairs, 1385 based on Foata normal form. 8/5987 useless extension candidates. Maximal degree in co-relation 52794. Up to 5495 conditions per place. [2024-06-27 19:36:04,947 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 278 selfloop transitions, 19 changer transitions 10/314 dead transitions. [2024-06-27 19:36:04,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 314 transitions, 4724 flow [2024-06-27 19:36:04,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:04,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:04,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-27 19:36:04,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-27 19:36:04,948 INFO L175 Difference]: Start difference. First operand has 331 places, 290 transitions, 3939 flow. Second operand 7 states and 154 transitions. [2024-06-27 19:36:04,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 314 transitions, 4724 flow [2024-06-27 19:36:11,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 314 transitions, 4434 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 19:36:11,452 INFO L231 Difference]: Finished difference. Result has 333 places, 292 transitions, 3735 flow [2024-06-27 19:36:11,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3657, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3735, PETRI_PLACES=333, PETRI_TRANSITIONS=292} [2024-06-27 19:36:11,452 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 293 predicate places. [2024-06-27 19:36:11,452 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 292 transitions, 3735 flow [2024-06-27 19:36:11,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:11,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:11,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:11,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 19:36:11,453 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)] === [2024-06-27 19:36:11,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:11,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1071471815, now seen corresponding path program 20 times [2024-06-27 19:36:11,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:11,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819493514] [2024-06-27 19:36:11,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:11,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:11,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:11,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:11,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819493514] [2024-06-27 19:36:11,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819493514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:11,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:11,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:36:11,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538776969] [2024-06-27 19:36:11,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:11,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:36:11,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:11,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:36:11,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:36:11,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:36:11,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 292 transitions, 3735 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:11,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:11,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:36:11,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:12,523 INFO L124 PetriNetUnfolderBase]: 3425/5901 cut-off events. [2024-06-27 19:36:12,523 INFO L125 PetriNetUnfolderBase]: For 1492023/1492023 co-relation queries the response was YES. [2024-06-27 19:36:12,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51256 conditions, 5901 events. 3425/5901 cut-off events. For 1492023/1492023 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 42215 event pairs, 1367 based on Foata normal form. 8/5906 useless extension candidates. Maximal degree in co-relation 51100. Up to 5319 conditions per place. [2024-06-27 19:36:12,590 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 265 selfloop transitions, 47 changer transitions 7/326 dead transitions. [2024-06-27 19:36:12,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 326 transitions, 4473 flow [2024-06-27 19:36:12,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:36:12,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:36:12,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:36:12,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2024-06-27 19:36:12,591 INFO L175 Difference]: Start difference. First operand has 333 places, 292 transitions, 3735 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:36:12,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 326 transitions, 4473 flow [2024-06-27 19:36:18,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 326 transitions, 4425 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 19:36:18,118 INFO L231 Difference]: Finished difference. Result has 334 places, 288 transitions, 3716 flow [2024-06-27 19:36:18,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3687, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3716, PETRI_PLACES=334, PETRI_TRANSITIONS=288} [2024-06-27 19:36:18,118 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 294 predicate places. [2024-06-27 19:36:18,118 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 288 transitions, 3716 flow [2024-06-27 19:36:18,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:18,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:18,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:18,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 19:36:18,119 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)] === [2024-06-27 19:36:18,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:18,119 INFO L85 PathProgramCache]: Analyzing trace with hash 152826575, now seen corresponding path program 21 times [2024-06-27 19:36:18,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:18,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869489193] [2024-06-27 19:36:18,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:18,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:18,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:18,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869489193] [2024-06-27 19:36:18,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869489193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:18,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:18,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:36:18,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279520307] [2024-06-27 19:36:18,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:18,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:36:18,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:18,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:36:18,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:36:18,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:36:18,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 288 transitions, 3716 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:18,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:18,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:36:18,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:19,179 INFO L124 PetriNetUnfolderBase]: 3367/5803 cut-off events. [2024-06-27 19:36:19,179 INFO L125 PetriNetUnfolderBase]: For 1442577/1442577 co-relation queries the response was YES. [2024-06-27 19:36:19,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49872 conditions, 5803 events. 3367/5803 cut-off events. For 1442577/1442577 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 41287 event pairs, 1120 based on Foata normal form. 8/5810 useless extension candidates. Maximal degree in co-relation 49717. Up to 4812 conditions per place. [2024-06-27 19:36:19,242 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 256 selfloop transitions, 55 changer transitions 11/329 dead transitions. [2024-06-27 19:36:19,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 329 transitions, 4714 flow [2024-06-27 19:36:19,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:36:19,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:36:19,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:36:19,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6506410256410257 [2024-06-27 19:36:19,244 INFO L175 Difference]: Start difference. First operand has 334 places, 288 transitions, 3716 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:36:19,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 329 transitions, 4714 flow [2024-06-27 19:36:24,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 329 transitions, 4604 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 19:36:24,360 INFO L231 Difference]: Finished difference. Result has 333 places, 280 transitions, 3603 flow [2024-06-27 19:36:24,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3608, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3603, PETRI_PLACES=333, PETRI_TRANSITIONS=280} [2024-06-27 19:36:24,360 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 293 predicate places. [2024-06-27 19:36:24,360 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 280 transitions, 3603 flow [2024-06-27 19:36:24,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:24,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:24,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:24,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 19:36:24,360 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)] === [2024-06-27 19:36:24,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:24,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1050901809, now seen corresponding path program 22 times [2024-06-27 19:36:24,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:24,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981957755] [2024-06-27 19:36:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:24,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:24,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:24,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981957755] [2024-06-27 19:36:24,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981957755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:24,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:24,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:36:24,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856093634] [2024-06-27 19:36:24,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:24,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:36:24,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:24,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:36:24,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:36:24,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:36:24,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 280 transitions, 3603 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:24,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:24,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:36:24,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:25,454 INFO L124 PetriNetUnfolderBase]: 3205/5554 cut-off events. [2024-06-27 19:36:25,454 INFO L125 PetriNetUnfolderBase]: For 1395702/1395702 co-relation queries the response was YES. [2024-06-27 19:36:25,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44992 conditions, 5554 events. 3205/5554 cut-off events. For 1395702/1395702 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 39451 event pairs, 1279 based on Foata normal form. 34/5585 useless extension candidates. Maximal degree in co-relation 44837. Up to 4822 conditions per place. [2024-06-27 19:36:25,503 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 260 selfloop transitions, 37 changer transitions 8/312 dead transitions. [2024-06-27 19:36:25,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 312 transitions, 4313 flow [2024-06-27 19:36:25,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:25,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:25,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:36:25,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-27 19:36:25,504 INFO L175 Difference]: Start difference. First operand has 333 places, 280 transitions, 3603 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:36:25,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 312 transitions, 4313 flow [2024-06-27 19:36:31,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 312 transitions, 4152 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-27 19:36:31,093 INFO L231 Difference]: Finished difference. Result has 329 places, 274 transitions, 3428 flow [2024-06-27 19:36:31,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3442, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3428, PETRI_PLACES=329, PETRI_TRANSITIONS=274} [2024-06-27 19:36:31,093 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 289 predicate places. [2024-06-27 19:36:31,093 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 274 transitions, 3428 flow [2024-06-27 19:36:31,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:31,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:31,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:31,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 19:36:31,093 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)] === [2024-06-27 19:36:31,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:31,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1518818195, now seen corresponding path program 23 times [2024-06-27 19:36:31,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:31,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153986142] [2024-06-27 19:36:31,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:31,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:31,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:31,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:31,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153986142] [2024-06-27 19:36:31,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153986142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:31,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:31,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:36:31,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805716099] [2024-06-27 19:36:31,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:31,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:36:31,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:31,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:36:31,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:36:31,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:36:31,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 274 transitions, 3428 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:31,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:31,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:36:31,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:32,041 INFO L124 PetriNetUnfolderBase]: 3051/5315 cut-off events. [2024-06-27 19:36:32,041 INFO L125 PetriNetUnfolderBase]: For 1190827/1190832 co-relation queries the response was YES. [2024-06-27 19:36:32,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42771 conditions, 5315 events. 3051/5315 cut-off events. For 1190827/1190832 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 37581 event pairs, 1239 based on Foata normal form. 13/5327 useless extension candidates. Maximal degree in co-relation 42617. Up to 4737 conditions per place. [2024-06-27 19:36:32,099 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 238 selfloop transitions, 47 changer transitions 10/302 dead transitions. [2024-06-27 19:36:32,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 302 transitions, 4102 flow [2024-06-27 19:36:32,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:36:32,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:36:32,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 19:36:32,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592948717948718 [2024-06-27 19:36:32,100 INFO L175 Difference]: Start difference. First operand has 329 places, 274 transitions, 3428 flow. Second operand 8 states and 185 transitions. [2024-06-27 19:36:32,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 302 transitions, 4102 flow [2024-06-27 19:36:35,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 302 transitions, 3970 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 19:36:35,577 INFO L231 Difference]: Finished difference. Result has 327 places, 270 transitions, 3328 flow [2024-06-27 19:36:35,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3296, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3328, PETRI_PLACES=327, PETRI_TRANSITIONS=270} [2024-06-27 19:36:35,577 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 287 predicate places. [2024-06-27 19:36:35,577 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 270 transitions, 3328 flow [2024-06-27 19:36:35,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:35,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:35,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:35,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 19:36:35,577 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)] === [2024-06-27 19:36:35,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:35,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1200847981, now seen corresponding path program 24 times [2024-06-27 19:36:35,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:35,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152913142] [2024-06-27 19:36:35,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:35,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:35,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:35,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:35,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152913142] [2024-06-27 19:36:35,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152913142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:35,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:35,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:36:35,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621319644] [2024-06-27 19:36:35,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:35,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:36:35,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:35,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:36:35,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:36:35,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:36:35,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 270 transitions, 3328 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:35,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:35,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:36:35,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:36,547 INFO L124 PetriNetUnfolderBase]: 3122/5432 cut-off events. [2024-06-27 19:36:36,547 INFO L125 PetriNetUnfolderBase]: For 1321304/1321304 co-relation queries the response was YES. [2024-06-27 19:36:36,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42825 conditions, 5432 events. 3122/5432 cut-off events. For 1321304/1321304 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 38483 event pairs, 1264 based on Foata normal form. 34/5465 useless extension candidates. Maximal degree in co-relation 42672. Up to 4727 conditions per place. [2024-06-27 19:36:36,604 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 241 selfloop transitions, 47 changer transitions 13/308 dead transitions. [2024-06-27 19:36:36,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 308 transitions, 4067 flow [2024-06-27 19:36:36,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:36:36,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:36:36,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-27 19:36:36,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6068376068376068 [2024-06-27 19:36:36,605 INFO L175 Difference]: Start difference. First operand has 327 places, 270 transitions, 3328 flow. Second operand 9 states and 213 transitions. [2024-06-27 19:36:36,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 308 transitions, 4067 flow [2024-06-27 19:36:39,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 308 transitions, 3965 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 19:36:39,734 INFO L231 Difference]: Finished difference. Result has 326 places, 266 transitions, 3272 flow [2024-06-27 19:36:39,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3226, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3272, PETRI_PLACES=326, PETRI_TRANSITIONS=266} [2024-06-27 19:36:39,734 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 286 predicate places. [2024-06-27 19:36:39,734 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 266 transitions, 3272 flow [2024-06-27 19:36:39,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:39,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:39,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:39,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 19:36:39,735 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)] === [2024-06-27 19:36:39,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:39,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1813453979, now seen corresponding path program 25 times [2024-06-27 19:36:39,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:39,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912157334] [2024-06-27 19:36:39,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:39,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:39,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:39,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912157334] [2024-06-27 19:36:39,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912157334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:39,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:39,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:36:39,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212559973] [2024-06-27 19:36:39,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:39,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:36:39,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:39,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:36:39,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:36:39,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:36:39,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 266 transitions, 3272 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:39,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:39,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:36:39,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:40,615 INFO L124 PetriNetUnfolderBase]: 2993/5221 cut-off events. [2024-06-27 19:36:40,615 INFO L125 PetriNetUnfolderBase]: For 1101044/1101049 co-relation queries the response was YES. [2024-06-27 19:36:40,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40978 conditions, 5221 events. 2993/5221 cut-off events. For 1101044/1101049 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 36854 event pairs, 1218 based on Foata normal form. 11/5231 useless extension candidates. Maximal degree in co-relation 40826. Up to 4644 conditions per place. [2024-06-27 19:36:40,670 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 241 selfloop transitions, 49 changer transitions 0/297 dead transitions. [2024-06-27 19:36:40,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 297 transitions, 3936 flow [2024-06-27 19:36:40,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:36:40,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:36:40,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 19:36:40,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993589743589743 [2024-06-27 19:36:40,671 INFO L175 Difference]: Start difference. First operand has 326 places, 266 transitions, 3272 flow. Second operand 8 states and 187 transitions. [2024-06-27 19:36:40,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 297 transitions, 3936 flow [2024-06-27 19:36:44,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 297 transitions, 3824 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 19:36:44,012 INFO L231 Difference]: Finished difference. Result has 323 places, 266 transitions, 3262 flow [2024-06-27 19:36:44,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3160, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3262, PETRI_PLACES=323, PETRI_TRANSITIONS=266} [2024-06-27 19:36:44,013 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 283 predicate places. [2024-06-27 19:36:44,013 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 266 transitions, 3262 flow [2024-06-27 19:36:44,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:44,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:44,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:44,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 19:36:44,013 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)] === [2024-06-27 19:36:44,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:44,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1754845685, now seen corresponding path program 26 times [2024-06-27 19:36:44,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:44,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168351698] [2024-06-27 19:36:44,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:44,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:44,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:44,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168351698] [2024-06-27 19:36:44,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168351698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:44,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:44,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:36:44,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154095965] [2024-06-27 19:36:44,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:44,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:36:44,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:44,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:36:44,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:36:44,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:36:44,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 266 transitions, 3262 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:44,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:44,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:36:44,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:44,958 INFO L124 PetriNetUnfolderBase]: 3127/5435 cut-off events. [2024-06-27 19:36:44,959 INFO L125 PetriNetUnfolderBase]: For 1216427/1216432 co-relation queries the response was YES. [2024-06-27 19:36:45,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44127 conditions, 5435 events. 3127/5435 cut-off events. For 1216427/1216432 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 38431 event pairs, 1124 based on Foata normal form. 11/5445 useless extension candidates. Maximal degree in co-relation 43976. Up to 4128 conditions per place. [2024-06-27 19:36:45,017 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 238 selfloop transitions, 63 changer transitions 0/308 dead transitions. [2024-06-27 19:36:45,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 308 transitions, 4455 flow [2024-06-27 19:36:45,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:36:45,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:36:45,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 19:36:45,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378205128205128 [2024-06-27 19:36:45,018 INFO L175 Difference]: Start difference. First operand has 323 places, 266 transitions, 3262 flow. Second operand 8 states and 199 transitions. [2024-06-27 19:36:45,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 308 transitions, 4455 flow [2024-06-27 19:36:48,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 308 transitions, 4175 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 19:36:48,487 INFO L231 Difference]: Finished difference. Result has 322 places, 267 transitions, 3145 flow [2024-06-27 19:36:48,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2982, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3145, PETRI_PLACES=322, PETRI_TRANSITIONS=267} [2024-06-27 19:36:48,488 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 282 predicate places. [2024-06-27 19:36:48,488 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 267 transitions, 3145 flow [2024-06-27 19:36:48,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:48,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:48,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:48,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 19:36:48,489 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)] === [2024-06-27 19:36:48,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:48,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1755231635, now seen corresponding path program 27 times [2024-06-27 19:36:48,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:48,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483531199] [2024-06-27 19:36:48,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:48,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:48,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:48,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483531199] [2024-06-27 19:36:48,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483531199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:48,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:48,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:36:48,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249018284] [2024-06-27 19:36:48,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:48,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:36:48,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:48,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:36:48,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:36:48,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:36:48,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 267 transitions, 3145 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:48,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:48,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:36:48,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:49,458 INFO L124 PetriNetUnfolderBase]: 3114/5431 cut-off events. [2024-06-27 19:36:49,459 INFO L125 PetriNetUnfolderBase]: For 1203208/1203208 co-relation queries the response was YES. [2024-06-27 19:36:49,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43225 conditions, 5431 events. 3114/5431 cut-off events. For 1203208/1203208 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 38603 event pairs, 1210 based on Foata normal form. 6/5436 useless extension candidates. Maximal degree in co-relation 43075. Up to 4906 conditions per place. [2024-06-27 19:36:49,520 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 266 selfloop transitions, 18 changer transitions 0/291 dead transitions. [2024-06-27 19:36:49,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 291 transitions, 3785 flow [2024-06-27 19:36:49,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:49,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:49,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-27 19:36:49,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575091575091575 [2024-06-27 19:36:49,521 INFO L175 Difference]: Start difference. First operand has 322 places, 267 transitions, 3145 flow. Second operand 7 states and 157 transitions. [2024-06-27 19:36:49,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 291 transitions, 3785 flow [2024-06-27 19:36:55,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 291 transitions, 3487 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 19:36:55,333 INFO L231 Difference]: Finished difference. Result has 322 places, 267 transitions, 2887 flow [2024-06-27 19:36:55,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2847, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2887, PETRI_PLACES=322, PETRI_TRANSITIONS=267} [2024-06-27 19:36:55,333 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 282 predicate places. [2024-06-27 19:36:55,333 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 267 transitions, 2887 flow [2024-06-27 19:36:55,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:55,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:55,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:55,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 19:36:55,334 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)] === [2024-06-27 19:36:55,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:55,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1200995851, now seen corresponding path program 28 times [2024-06-27 19:36:55,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:55,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345977282] [2024-06-27 19:36:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:55,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:55,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:55,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345977282] [2024-06-27 19:36:55,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345977282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:55,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:55,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:36:55,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928799825] [2024-06-27 19:36:55,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:55,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:36:55,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:55,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:36:55,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:36:55,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:36:55,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 267 transitions, 2887 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:55,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:55,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:36:55,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:56,272 INFO L124 PetriNetUnfolderBase]: 3055/5322 cut-off events. [2024-06-27 19:36:56,273 INFO L125 PetriNetUnfolderBase]: For 1186932/1186932 co-relation queries the response was YES. [2024-06-27 19:36:56,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39046 conditions, 5322 events. 3055/5322 cut-off events. For 1186932/1186932 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 37599 event pairs, 1178 based on Foata normal form. 30/5351 useless extension candidates. Maximal degree in co-relation 38896. Up to 4299 conditions per place. [2024-06-27 19:36:56,327 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 248 selfloop transitions, 54 changer transitions 5/314 dead transitions. [2024-06-27 19:36:56,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 314 transitions, 3873 flow [2024-06-27 19:36:56,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:36:56,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:36:56,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-27 19:36:56,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2024-06-27 19:36:56,328 INFO L175 Difference]: Start difference. First operand has 322 places, 267 transitions, 2887 flow. Second operand 9 states and 222 transitions. [2024-06-27 19:36:56,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 314 transitions, 3873 flow [2024-06-27 19:37:00,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 314 transitions, 3634 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-27 19:37:00,930 INFO L231 Difference]: Finished difference. Result has 320 places, 265 transitions, 2730 flow [2024-06-27 19:37:00,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2648, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2730, PETRI_PLACES=320, PETRI_TRANSITIONS=265} [2024-06-27 19:37:00,931 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 280 predicate places. [2024-06-27 19:37:00,931 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 265 transitions, 2730 flow [2024-06-27 19:37:00,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:00,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:00,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:00,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 19:37:00,931 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)] === [2024-06-27 19:37:00,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:00,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1001546191, now seen corresponding path program 29 times [2024-06-27 19:37:00,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:00,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863368517] [2024-06-27 19:37:00,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:00,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:01,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:01,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863368517] [2024-06-27 19:37:01,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863368517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:01,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:01,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:01,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676136091] [2024-06-27 19:37:01,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:01,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:01,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:01,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:01,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:01,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:01,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 265 transitions, 2730 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:01,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:01,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:01,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:01,783 INFO L124 PetriNetUnfolderBase]: 2878/5032 cut-off events. [2024-06-27 19:37:01,783 INFO L125 PetriNetUnfolderBase]: For 1028766/1028766 co-relation queries the response was YES. [2024-06-27 19:37:01,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33861 conditions, 5032 events. 2878/5032 cut-off events. For 1028766/1028766 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 35193 event pairs, 1149 based on Foata normal form. 34/5065 useless extension candidates. Maximal degree in co-relation 33715. Up to 4356 conditions per place. [2024-06-27 19:37:01,833 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 237 selfloop transitions, 41 changer transitions 15/300 dead transitions. [2024-06-27 19:37:01,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 300 transitions, 3422 flow [2024-06-27 19:37:01,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:37:01,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:37:01,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-27 19:37:01,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-27 19:37:01,834 INFO L175 Difference]: Start difference. First operand has 320 places, 265 transitions, 2730 flow. Second operand 10 states and 225 transitions. [2024-06-27 19:37:01,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 300 transitions, 3422 flow [2024-06-27 19:37:07,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 300 transitions, 3204 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-27 19:37:07,161 INFO L231 Difference]: Finished difference. Result has 319 places, 258 transitions, 2541 flow [2024-06-27 19:37:07,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2512, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2541, PETRI_PLACES=319, PETRI_TRANSITIONS=258} [2024-06-27 19:37:07,161 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 279 predicate places. [2024-06-27 19:37:07,161 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 258 transitions, 2541 flow [2024-06-27 19:37:07,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:07,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:07,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:07,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 19:37:07,161 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)] === [2024-06-27 19:37:07,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:07,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1050686607, now seen corresponding path program 2 times [2024-06-27 19:37:07,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:07,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444978933] [2024-06-27 19:37:07,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:07,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:07,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:07,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444978933] [2024-06-27 19:37:07,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444978933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:07,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:07,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:07,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231015656] [2024-06-27 19:37:07,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:07,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:07,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:07,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:07,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:07,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:07,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 258 transitions, 2541 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:07,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:07,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:07,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:07,977 INFO L124 PetriNetUnfolderBase]: 2666/4661 cut-off events. [2024-06-27 19:37:07,977 INFO L125 PetriNetUnfolderBase]: For 821784/821784 co-relation queries the response was YES. [2024-06-27 19:37:08,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28797 conditions, 4661 events. 2666/4661 cut-off events. For 821784/821784 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 31951 event pairs, 847 based on Foata normal form. 30/4686 useless extension candidates. Maximal degree in co-relation 28653. Up to 3594 conditions per place. [2024-06-27 19:37:08,021 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 238 selfloop transitions, 35 changer transitions 16/296 dead transitions. [2024-06-27 19:37:08,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 296 transitions, 3253 flow [2024-06-27 19:37:08,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:37:08,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:37:08,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:37:08,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6593406593406593 [2024-06-27 19:37:08,022 INFO L175 Difference]: Start difference. First operand has 319 places, 258 transitions, 2541 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:37:08,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 296 transitions, 3253 flow [2024-06-27 19:37:11,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 296 transitions, 3144 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-27 19:37:11,472 INFO L231 Difference]: Finished difference. Result has 313 places, 248 transitions, 2396 flow [2024-06-27 19:37:11,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2432, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2396, PETRI_PLACES=313, PETRI_TRANSITIONS=248} [2024-06-27 19:37:11,472 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 273 predicate places. [2024-06-27 19:37:11,472 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 248 transitions, 2396 flow [2024-06-27 19:37:11,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:11,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:11,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:11,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 19:37:11,472 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)] === [2024-06-27 19:37:11,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:11,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1115516175, now seen corresponding path program 3 times [2024-06-27 19:37:11,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:11,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492919274] [2024-06-27 19:37:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:11,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:11,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:11,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:11,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492919274] [2024-06-27 19:37:11,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492919274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:11,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:11,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:11,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141274739] [2024-06-27 19:37:11,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:11,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:11,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:11,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:11,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:11,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:11,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 248 transitions, 2396 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:11,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:11,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:11,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:12,197 INFO L124 PetriNetUnfolderBase]: 2486/4342 cut-off events. [2024-06-27 19:37:12,197 INFO L125 PetriNetUnfolderBase]: For 664900/664900 co-relation queries the response was YES. [2024-06-27 19:37:12,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27579 conditions, 4342 events. 2486/4342 cut-off events. For 664900/664900 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 29083 event pairs, 582 based on Foata normal form. 6/4347 useless extension candidates. Maximal degree in co-relation 27436. Up to 3053 conditions per place. [2024-06-27 19:37:12,239 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 229 selfloop transitions, 44 changer transitions 7/287 dead transitions. [2024-06-27 19:37:12,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 287 transitions, 3319 flow [2024-06-27 19:37:12,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:12,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:12,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 19:37:12,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:37:12,240 INFO L175 Difference]: Start difference. First operand has 313 places, 248 transitions, 2396 flow. Second operand 8 states and 195 transitions. [2024-06-27 19:37:12,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 287 transitions, 3319 flow [2024-06-27 19:37:15,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 287 transitions, 2964 flow, removed 13 selfloop flow, removed 25 redundant places. [2024-06-27 19:37:15,170 INFO L231 Difference]: Finished difference. Result has 295 places, 246 transitions, 2130 flow [2024-06-27 19:37:15,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2053, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2130, PETRI_PLACES=295, PETRI_TRANSITIONS=246} [2024-06-27 19:37:15,170 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 255 predicate places. [2024-06-27 19:37:15,171 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 246 transitions, 2130 flow [2024-06-27 19:37:15,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:15,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:15,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:15,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 19:37:15,171 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)] === [2024-06-27 19:37:15,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:15,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1095323499, now seen corresponding path program 4 times [2024-06-27 19:37:15,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:15,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758621443] [2024-06-27 19:37:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:15,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:15,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:15,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758621443] [2024-06-27 19:37:15,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758621443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:15,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:15,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:15,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847655883] [2024-06-27 19:37:15,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:15,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:15,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:15,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:15,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:15,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:15,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 246 transitions, 2130 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:15,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:15,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:15,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:15,819 INFO L124 PetriNetUnfolderBase]: 2254/3942 cut-off events. [2024-06-27 19:37:15,819 INFO L125 PetriNetUnfolderBase]: For 442298/442298 co-relation queries the response was YES. [2024-06-27 19:37:15,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19924 conditions, 3942 events. 2254/3942 cut-off events. For 442298/442298 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 25810 event pairs, 432 based on Foata normal form. 24/3965 useless extension candidates. Maximal degree in co-relation 19790. Up to 2848 conditions per place. [2024-06-27 19:37:15,853 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 222 selfloop transitions, 40 changer transitions 16/285 dead transitions. [2024-06-27 19:37:15,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 285 transitions, 2818 flow [2024-06-27 19:37:15,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:15,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:15,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:37:15,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2024-06-27 19:37:15,854 INFO L175 Difference]: Start difference. First operand has 295 places, 246 transitions, 2130 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:37:15,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 285 transitions, 2818 flow [2024-06-27 19:37:18,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 285 transitions, 2643 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 19:37:18,401 INFO L231 Difference]: Finished difference. Result has 292 places, 239 transitions, 1989 flow [2024-06-27 19:37:18,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1955, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1989, PETRI_PLACES=292, PETRI_TRANSITIONS=239} [2024-06-27 19:37:18,402 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 252 predicate places. [2024-06-27 19:37:18,402 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 239 transitions, 1989 flow [2024-06-27 19:37:18,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:18,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:18,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:18,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 19:37:18,402 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)] === [2024-06-27 19:37:18,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:18,403 INFO L85 PathProgramCache]: Analyzing trace with hash -993921679, now seen corresponding path program 5 times [2024-06-27 19:37:18,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:18,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519867910] [2024-06-27 19:37:18,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:18,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:18,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:18,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519867910] [2024-06-27 19:37:18,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519867910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:18,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:18,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:18,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347115306] [2024-06-27 19:37:18,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:18,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:18,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:18,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:18,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:18,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:18,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 239 transitions, 1989 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:18,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:18,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:18,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:18,966 INFO L124 PetriNetUnfolderBase]: 2029/3527 cut-off events. [2024-06-27 19:37:18,967 INFO L125 PetriNetUnfolderBase]: For 305080/305080 co-relation queries the response was YES. [2024-06-27 19:37:18,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15087 conditions, 3527 events. 2029/3527 cut-off events. For 305080/305080 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 22733 event pairs, 530 based on Foata normal form. 30/3556 useless extension candidates. Maximal degree in co-relation 14956. Up to 2766 conditions per place. [2024-06-27 19:37:18,996 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 216 selfloop transitions, 27 changer transitions 30/280 dead transitions. [2024-06-27 19:37:18,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 280 transitions, 2675 flow [2024-06-27 19:37:18,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:37:18,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:37:18,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-27 19:37:18,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5743589743589743 [2024-06-27 19:37:18,997 INFO L175 Difference]: Start difference. First operand has 292 places, 239 transitions, 1989 flow. Second operand 10 states and 224 transitions. [2024-06-27 19:37:18,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 280 transitions, 2675 flow [2024-06-27 19:37:20,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 280 transitions, 2554 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-27 19:37:20,202 INFO L231 Difference]: Finished difference. Result has 286 places, 225 transitions, 1809 flow [2024-06-27 19:37:20,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1868, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1809, PETRI_PLACES=286, PETRI_TRANSITIONS=225} [2024-06-27 19:37:20,202 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 246 predicate places. [2024-06-27 19:37:20,202 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 225 transitions, 1809 flow [2024-06-27 19:37:20,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:20,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:20,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:20,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 19:37:20,203 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)] === [2024-06-27 19:37:20,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:20,203 INFO L85 PathProgramCache]: Analyzing trace with hash -2134477145, now seen corresponding path program 1 times [2024-06-27 19:37:20,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:20,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134640643] [2024-06-27 19:37:20,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:20,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:20,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:20,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134640643] [2024-06-27 19:37:20,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134640643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:20,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:20,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:20,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638581971] [2024-06-27 19:37:20,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:20,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:20,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:20,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:20,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:20,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:20,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 225 transitions, 1809 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:20,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:20,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:20,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:20,751 INFO L124 PetriNetUnfolderBase]: 2072/3584 cut-off events. [2024-06-27 19:37:20,751 INFO L125 PetriNetUnfolderBase]: For 476635/476635 co-relation queries the response was YES. [2024-06-27 19:37:20,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19691 conditions, 3584 events. 2072/3584 cut-off events. For 476635/476635 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 22983 event pairs, 582 based on Foata normal form. 18/3600 useless extension candidates. Maximal degree in co-relation 19563. Up to 1582 conditions per place. [2024-06-27 19:37:20,787 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 170 selfloop transitions, 78 changer transitions 16/271 dead transitions. [2024-06-27 19:37:20,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 271 transitions, 2913 flow [2024-06-27 19:37:20,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:20,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:20,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 19:37:20,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378205128205128 [2024-06-27 19:37:20,788 INFO L175 Difference]: Start difference. First operand has 286 places, 225 transitions, 1809 flow. Second operand 8 states and 199 transitions. [2024-06-27 19:37:20,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 271 transitions, 2913 flow [2024-06-27 19:37:23,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 271 transitions, 2734 flow, removed 33 selfloop flow, removed 14 redundant places. [2024-06-27 19:37:23,122 INFO L231 Difference]: Finished difference. Result has 268 places, 222 transitions, 1808 flow [2024-06-27 19:37:23,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1674, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1808, PETRI_PLACES=268, PETRI_TRANSITIONS=222} [2024-06-27 19:37:23,122 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 228 predicate places. [2024-06-27 19:37:23,122 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 222 transitions, 1808 flow [2024-06-27 19:37:23,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:23,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:23,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:23,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 19:37:23,123 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)] === [2024-06-27 19:37:23,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:23,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1387976143, now seen corresponding path program 2 times [2024-06-27 19:37:23,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:23,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069051551] [2024-06-27 19:37:23,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:23,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:23,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:23,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:23,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069051551] [2024-06-27 19:37:23,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069051551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:23,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:23,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:23,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418805738] [2024-06-27 19:37:23,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:23,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:23,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:23,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:23,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:23,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:23,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 222 transitions, 1808 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:23,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:23,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:23,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:23,790 INFO L124 PetriNetUnfolderBase]: 2209/3808 cut-off events. [2024-06-27 19:37:23,790 INFO L125 PetriNetUnfolderBase]: For 571394/571394 co-relation queries the response was YES. [2024-06-27 19:37:23,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23696 conditions, 3808 events. 2209/3808 cut-off events. For 571394/571394 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 24632 event pairs, 671 based on Foata normal form. 18/3824 useless extension candidates. Maximal degree in co-relation 23575. Up to 2535 conditions per place. [2024-06-27 19:37:23,827 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 166 selfloop transitions, 90 changer transitions 8/271 dead transitions. [2024-06-27 19:37:23,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 271 transitions, 2874 flow [2024-06-27 19:37:23,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:23,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:23,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-27 19:37:23,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-27 19:37:23,828 INFO L175 Difference]: Start difference. First operand has 268 places, 222 transitions, 1808 flow. Second operand 9 states and 221 transitions. [2024-06-27 19:37:23,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 271 transitions, 2874 flow [2024-06-27 19:37:25,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 271 transitions, 2715 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:37:25,198 INFO L231 Difference]: Finished difference. Result has 267 places, 220 transitions, 1826 flow [2024-06-27 19:37:25,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1826, PETRI_PLACES=267, PETRI_TRANSITIONS=220} [2024-06-27 19:37:25,198 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 227 predicate places. [2024-06-27 19:37:25,198 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 220 transitions, 1826 flow [2024-06-27 19:37:25,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:25,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:25,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:25,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 19:37:25,198 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)] === [2024-06-27 19:37:25,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:25,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1388183533, now seen corresponding path program 3 times [2024-06-27 19:37:25,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:25,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367802816] [2024-06-27 19:37:25,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:25,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:25,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:25,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367802816] [2024-06-27 19:37:25,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367802816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:25,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:25,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:25,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57556935] [2024-06-27 19:37:25,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:25,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:25,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:25,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:25,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:25,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:25,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 220 transitions, 1826 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:25,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:25,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:25,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:25,759 INFO L124 PetriNetUnfolderBase]: 1990/3419 cut-off events. [2024-06-27 19:37:25,759 INFO L125 PetriNetUnfolderBase]: For 388638/388638 co-relation queries the response was YES. [2024-06-27 19:37:25,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18749 conditions, 3419 events. 1990/3419 cut-off events. For 388638/388638 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 21548 event pairs, 571 based on Foata normal form. 18/3435 useless extension candidates. Maximal degree in co-relation 18629. Up to 2349 conditions per place. [2024-06-27 19:37:25,787 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 148 selfloop transitions, 87 changer transitions 22/264 dead transitions. [2024-06-27 19:37:25,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 264 transitions, 2668 flow [2024-06-27 19:37:25,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:25,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:25,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 19:37:25,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125356125356125 [2024-06-27 19:37:25,788 INFO L175 Difference]: Start difference. First operand has 267 places, 220 transitions, 1826 flow. Second operand 9 states and 215 transitions. [2024-06-27 19:37:25,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 264 transitions, 2668 flow [2024-06-27 19:37:27,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 264 transitions, 2481 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:27,045 INFO L231 Difference]: Finished difference. Result has 266 places, 216 transitions, 1778 flow [2024-06-27 19:37:27,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1778, PETRI_PLACES=266, PETRI_TRANSITIONS=216} [2024-06-27 19:37:27,045 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 226 predicate places. [2024-06-27 19:37:27,045 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 216 transitions, 1778 flow [2024-06-27 19:37:27,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:27,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:27,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:27,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 19:37:27,045 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)] === [2024-06-27 19:37:27,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:27,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1168984995, now seen corresponding path program 4 times [2024-06-27 19:37:27,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:27,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944934914] [2024-06-27 19:37:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:27,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:27,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:27,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944934914] [2024-06-27 19:37:27,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944934914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:27,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:27,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:27,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074115566] [2024-06-27 19:37:27,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:27,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:27,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:27,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:27,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:27,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:27,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 216 transitions, 1778 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:27,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:27,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:27,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:27,690 INFO L124 PetriNetUnfolderBase]: 2062/3557 cut-off events. [2024-06-27 19:37:27,690 INFO L125 PetriNetUnfolderBase]: For 482475/482475 co-relation queries the response was YES. [2024-06-27 19:37:27,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20756 conditions, 3557 events. 2062/3557 cut-off events. For 482475/482475 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 22825 event pairs, 695 based on Foata normal form. 24/3579 useless extension candidates. Maximal degree in co-relation 20637. Up to 2751 conditions per place. [2024-06-27 19:37:27,715 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 155 selfloop transitions, 81 changer transitions 10/253 dead transitions. [2024-06-27 19:37:27,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 253 transitions, 2576 flow [2024-06-27 19:37:27,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:37:27,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:37:27,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 243 transitions. [2024-06-27 19:37:27,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5664335664335665 [2024-06-27 19:37:27,716 INFO L175 Difference]: Start difference. First operand has 266 places, 216 transitions, 1778 flow. Second operand 11 states and 243 transitions. [2024-06-27 19:37:27,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 253 transitions, 2576 flow [2024-06-27 19:37:28,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 253 transitions, 2388 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 19:37:28,889 INFO L231 Difference]: Finished difference. Result has 261 places, 213 transitions, 1733 flow [2024-06-27 19:37:28,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1596, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1733, PETRI_PLACES=261, PETRI_TRANSITIONS=213} [2024-06-27 19:37:28,889 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 221 predicate places. [2024-06-27 19:37:28,889 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 213 transitions, 1733 flow [2024-06-27 19:37:28,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:28,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:28,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:28,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 19:37:28,890 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)] === [2024-06-27 19:37:28,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:28,890 INFO L85 PathProgramCache]: Analyzing trace with hash -715770155, now seen corresponding path program 5 times [2024-06-27 19:37:28,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:28,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751375067] [2024-06-27 19:37:28,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:28,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:28,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:28,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751375067] [2024-06-27 19:37:28,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751375067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:28,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:28,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:28,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606197464] [2024-06-27 19:37:28,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:28,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:28,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:28,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:28,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:28,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:28,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 213 transitions, 1733 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:28,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:28,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:28,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:29,414 INFO L124 PetriNetUnfolderBase]: 1911/3296 cut-off events. [2024-06-27 19:37:29,414 INFO L125 PetriNetUnfolderBase]: For 370030/370030 co-relation queries the response was YES. [2024-06-27 19:37:29,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17359 conditions, 3296 events. 1911/3296 cut-off events. For 370030/370030 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 20790 event pairs, 648 based on Foata normal form. 26/3320 useless extension candidates. Maximal degree in co-relation 17243. Up to 2757 conditions per place. [2024-06-27 19:37:29,449 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 146 selfloop transitions, 76 changer transitions 14/243 dead transitions. [2024-06-27 19:37:29,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 243 transitions, 2297 flow [2024-06-27 19:37:29,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:37:29,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:37:29,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-27 19:37:29,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501165501165501 [2024-06-27 19:37:29,450 INFO L175 Difference]: Start difference. First operand has 261 places, 213 transitions, 1733 flow. Second operand 11 states and 236 transitions. [2024-06-27 19:37:29,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 243 transitions, 2297 flow [2024-06-27 19:37:30,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 243 transitions, 2137 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 19:37:30,414 INFO L231 Difference]: Finished difference. Result has 260 places, 208 transitions, 1696 flow [2024-06-27 19:37:30,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1573, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1696, PETRI_PLACES=260, PETRI_TRANSITIONS=208} [2024-06-27 19:37:30,414 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 220 predicate places. [2024-06-27 19:37:30,414 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 208 transitions, 1696 flow [2024-06-27 19:37:30,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:30,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:30,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:30,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 19:37:30,415 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)] === [2024-06-27 19:37:30,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:30,415 INFO L85 PathProgramCache]: Analyzing trace with hash -968191699, now seen corresponding path program 6 times [2024-06-27 19:37:30,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:30,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137614276] [2024-06-27 19:37:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:30,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:30,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:30,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137614276] [2024-06-27 19:37:30,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137614276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:30,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:30,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:30,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976189423] [2024-06-27 19:37:30,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:30,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:30,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:30,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:30,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:30,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:30,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 208 transitions, 1696 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:30,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:30,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:30,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:30,976 INFO L124 PetriNetUnfolderBase]: 2070/3581 cut-off events. [2024-06-27 19:37:30,977 INFO L125 PetriNetUnfolderBase]: For 487247/487247 co-relation queries the response was YES. [2024-06-27 19:37:30,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21710 conditions, 3581 events. 2070/3581 cut-off events. For 487247/487247 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 23054 event pairs, 704 based on Foata normal form. 18/3597 useless extension candidates. Maximal degree in co-relation 21595. Up to 2420 conditions per place. [2024-06-27 19:37:31,007 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 158 selfloop transitions, 76 changer transitions 8/249 dead transitions. [2024-06-27 19:37:31,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 249 transitions, 2670 flow [2024-06-27 19:37:31,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:37:31,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:37:31,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-27 19:37:31,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5871794871794872 [2024-06-27 19:37:31,008 INFO L175 Difference]: Start difference. First operand has 260 places, 208 transitions, 1696 flow. Second operand 10 states and 229 transitions. [2024-06-27 19:37:31,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 249 transitions, 2670 flow [2024-06-27 19:37:32,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 249 transitions, 2500 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-27 19:37:32,300 INFO L231 Difference]: Finished difference. Result has 255 places, 206 transitions, 1679 flow [2024-06-27 19:37:32,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1679, PETRI_PLACES=255, PETRI_TRANSITIONS=206} [2024-06-27 19:37:32,300 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 215 predicate places. [2024-06-27 19:37:32,300 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 206 transitions, 1679 flow [2024-06-27 19:37:32,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:32,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:32,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:32,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 19:37:32,301 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)] === [2024-06-27 19:37:32,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:32,301 INFO L85 PathProgramCache]: Analyzing trace with hash 719437805, now seen corresponding path program 7 times [2024-06-27 19:37:32,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:32,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734603783] [2024-06-27 19:37:32,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:32,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:32,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:32,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:32,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734603783] [2024-06-27 19:37:32,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734603783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:32,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:32,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:32,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397826487] [2024-06-27 19:37:32,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:32,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:32,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:32,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:32,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:32,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:32,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 206 transitions, 1679 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:32,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:32,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:32,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:32,924 INFO L124 PetriNetUnfolderBase]: 1965/3406 cut-off events. [2024-06-27 19:37:32,924 INFO L125 PetriNetUnfolderBase]: For 400745/400745 co-relation queries the response was YES. [2024-06-27 19:37:32,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19440 conditions, 3406 events. 1965/3406 cut-off events. For 400745/400745 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 21723 event pairs, 614 based on Foata normal form. 18/3422 useless extension candidates. Maximal degree in co-relation 19327. Up to 2420 conditions per place. [2024-06-27 19:37:32,946 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 157 selfloop transitions, 75 changer transitions 9/248 dead transitions. [2024-06-27 19:37:32,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 248 transitions, 2651 flow [2024-06-27 19:37:32,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:37:32,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:37:32,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-27 19:37:32,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5871794871794872 [2024-06-27 19:37:32,947 INFO L175 Difference]: Start difference. First operand has 255 places, 206 transitions, 1679 flow. Second operand 10 states and 229 transitions. [2024-06-27 19:37:32,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 248 transitions, 2651 flow [2024-06-27 19:37:33,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 248 transitions, 2488 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 19:37:33,876 INFO L231 Difference]: Finished difference. Result has 254 places, 203 transitions, 1650 flow [2024-06-27 19:37:33,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1650, PETRI_PLACES=254, PETRI_TRANSITIONS=203} [2024-06-27 19:37:33,876 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 214 predicate places. [2024-06-27 19:37:33,876 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 203 transitions, 1650 flow [2024-06-27 19:37:33,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:33,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:33,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:33,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 19:37:33,876 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)] === [2024-06-27 19:37:33,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:33,877 INFO L85 PathProgramCache]: Analyzing trace with hash 808092845, now seen corresponding path program 8 times [2024-06-27 19:37:33,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:33,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389669558] [2024-06-27 19:37:33,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:33,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:33,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:33,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389669558] [2024-06-27 19:37:33,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389669558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:33,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:33,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:33,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892191267] [2024-06-27 19:37:33,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:33,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:33,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:33,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:33,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:33,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:33,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 203 transitions, 1650 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:33,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:33,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:33,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:34,362 INFO L124 PetriNetUnfolderBase]: 1840/3187 cut-off events. [2024-06-27 19:37:34,363 INFO L125 PetriNetUnfolderBase]: For 329680/329680 co-relation queries the response was YES. [2024-06-27 19:37:34,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16491 conditions, 3187 events. 1840/3187 cut-off events. For 329680/329680 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 20083 event pairs, 645 based on Foata normal form. 26/3211 useless extension candidates. Maximal degree in co-relation 16379. Up to 2654 conditions per place. [2024-06-27 19:37:34,387 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 141 selfloop transitions, 71 changer transitions 12/231 dead transitions. [2024-06-27 19:37:34,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 231 transitions, 2186 flow [2024-06-27 19:37:34,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-27 19:37:34,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698005698005698 [2024-06-27 19:37:34,388 INFO L175 Difference]: Start difference. First operand has 254 places, 203 transitions, 1650 flow. Second operand 9 states and 200 transitions. [2024-06-27 19:37:34,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 231 transitions, 2186 flow [2024-06-27 19:37:35,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 231 transitions, 2031 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 19:37:35,521 INFO L231 Difference]: Finished difference. Result has 249 places, 199 transitions, 1614 flow [2024-06-27 19:37:35,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1614, PETRI_PLACES=249, PETRI_TRANSITIONS=199} [2024-06-27 19:37:35,522 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 209 predicate places. [2024-06-27 19:37:35,522 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 199 transitions, 1614 flow [2024-06-27 19:37:35,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:35,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:35,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:35,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 19:37:35,522 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)] === [2024-06-27 19:37:35,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:35,522 INFO L85 PathProgramCache]: Analyzing trace with hash -966317749, now seen corresponding path program 9 times [2024-06-27 19:37:35,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:35,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241482037] [2024-06-27 19:37:35,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:35,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:35,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:35,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:35,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241482037] [2024-06-27 19:37:35,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241482037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:35,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:35,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:35,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680536498] [2024-06-27 19:37:35,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:35,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:35,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:35,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:35,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:35,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:35,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 199 transitions, 1614 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:35,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:35,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:35,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:36,020 INFO L124 PetriNetUnfolderBase]: 1711/2978 cut-off events. [2024-06-27 19:37:36,020 INFO L125 PetriNetUnfolderBase]: For 227795/227795 co-relation queries the response was YES. [2024-06-27 19:37:36,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13713 conditions, 2978 events. 1711/2978 cut-off events. For 227795/227795 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 18544 event pairs, 521 based on Foata normal form. 24/3000 useless extension candidates. Maximal degree in co-relation 13603. Up to 2420 conditions per place. [2024-06-27 19:37:36,045 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 132 selfloop transitions, 66 changer transitions 26/231 dead transitions. [2024-06-27 19:37:36,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 231 transitions, 2172 flow [2024-06-27 19:37:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:36,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-27 19:37:36,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5726495726495726 [2024-06-27 19:37:36,046 INFO L175 Difference]: Start difference. First operand has 249 places, 199 transitions, 1614 flow. Second operand 9 states and 201 transitions. [2024-06-27 19:37:36,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 231 transitions, 2172 flow [2024-06-27 19:37:36,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 231 transitions, 2026 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:36,767 INFO L231 Difference]: Finished difference. Result has 246 places, 193 transitions, 1553 flow [2024-06-27 19:37:36,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1553, PETRI_PLACES=246, PETRI_TRANSITIONS=193} [2024-06-27 19:37:36,768 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 206 predicate places. [2024-06-27 19:37:36,768 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 193 transitions, 1553 flow [2024-06-27 19:37:36,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:36,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:36,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:36,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 19:37:36,768 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)] === [2024-06-27 19:37:36,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:36,768 INFO L85 PathProgramCache]: Analyzing trace with hash 697036003, now seen corresponding path program 10 times [2024-06-27 19:37:36,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:36,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880872147] [2024-06-27 19:37:36,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:36,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:36,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:36,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:36,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880872147] [2024-06-27 19:37:36,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880872147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:36,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:36,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:36,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013201462] [2024-06-27 19:37:36,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:36,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:36,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:36,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:36,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:36,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:36,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 193 transitions, 1553 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:36,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:36,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:36,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:37,248 INFO L124 PetriNetUnfolderBase]: 1678/2899 cut-off events. [2024-06-27 19:37:37,248 INFO L125 PetriNetUnfolderBase]: For 229481/229481 co-relation queries the response was YES. [2024-06-27 19:37:37,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13396 conditions, 2899 events. 1678/2899 cut-off events. For 229481/229481 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 17894 event pairs, 555 based on Foata normal form. 26/2923 useless extension candidates. Maximal degree in co-relation 13287. Up to 2414 conditions per place. [2024-06-27 19:37:37,272 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 139 selfloop transitions, 60 changer transitions 12/218 dead transitions. [2024-06-27 19:37:37,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 218 transitions, 2055 flow [2024-06-27 19:37:37,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:37,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:37,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-27 19:37:37,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669515669515669 [2024-06-27 19:37:37,273 INFO L175 Difference]: Start difference. First operand has 246 places, 193 transitions, 1553 flow. Second operand 9 states and 199 transitions. [2024-06-27 19:37:37,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 218 transitions, 2055 flow [2024-06-27 19:37:37,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 218 transitions, 1906 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 19:37:37,941 INFO L231 Difference]: Finished difference. Result has 237 places, 189 transitions, 1504 flow [2024-06-27 19:37:37,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1404, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1504, PETRI_PLACES=237, PETRI_TRANSITIONS=189} [2024-06-27 19:37:37,942 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 197 predicate places. [2024-06-27 19:37:37,942 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 189 transitions, 1504 flow [2024-06-27 19:37:37,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:37,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:37,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:37,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 19:37:37,942 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)] === [2024-06-27 19:37:37,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:37,942 INFO L85 PathProgramCache]: Analyzing trace with hash 686287097, now seen corresponding path program 1 times [2024-06-27 19:37:37,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:37,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127725130] [2024-06-27 19:37:37,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:37,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:38,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:38,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127725130] [2024-06-27 19:37:38,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127725130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:38,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:38,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:38,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255201440] [2024-06-27 19:37:38,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:38,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:38,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:38,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:38,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:38,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:38,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 189 transitions, 1504 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:38,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:38,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:38,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:38,444 INFO L124 PetriNetUnfolderBase]: 1871/3256 cut-off events. [2024-06-27 19:37:38,444 INFO L125 PetriNetUnfolderBase]: For 331716/331716 co-relation queries the response was YES. [2024-06-27 19:37:38,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17931 conditions, 3256 events. 1871/3256 cut-off events. For 331716/331716 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 20753 event pairs, 552 based on Foata normal form. 18/3272 useless extension candidates. Maximal degree in co-relation 17825. Up to 1084 conditions per place. [2024-06-27 19:37:38,468 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 134 selfloop transitions, 74 changer transitions 17/232 dead transitions. [2024-06-27 19:37:38,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 232 transitions, 2422 flow [2024-06-27 19:37:38,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:38,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:38,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:37:38,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2024-06-27 19:37:38,468 INFO L175 Difference]: Start difference. First operand has 237 places, 189 transitions, 1504 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:37:38,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 232 transitions, 2422 flow [2024-06-27 19:37:39,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 232 transitions, 2290 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:39,218 INFO L231 Difference]: Finished difference. Result has 234 places, 185 transitions, 1499 flow [2024-06-27 19:37:39,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1380, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1499, PETRI_PLACES=234, PETRI_TRANSITIONS=185} [2024-06-27 19:37:39,218 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 194 predicate places. [2024-06-27 19:37:39,218 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 185 transitions, 1499 flow [2024-06-27 19:37:39,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:39,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:39,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:39,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 19:37:39,219 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)] === [2024-06-27 19:37:39,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:39,219 INFO L85 PathProgramCache]: Analyzing trace with hash 490896727, now seen corresponding path program 2 times [2024-06-27 19:37:39,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:39,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926087276] [2024-06-27 19:37:39,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:39,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:39,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:39,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926087276] [2024-06-27 19:37:39,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926087276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:39,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:39,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:39,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263380569] [2024-06-27 19:37:39,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:39,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:39,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:39,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:39,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:39,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:39,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 185 transitions, 1499 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:39,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:39,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:39,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:39,767 INFO L124 PetriNetUnfolderBase]: 1871/3256 cut-off events. [2024-06-27 19:37:39,767 INFO L125 PetriNetUnfolderBase]: For 375757/375757 co-relation queries the response was YES. [2024-06-27 19:37:39,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19327 conditions, 3256 events. 1871/3256 cut-off events. For 375757/375757 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 20818 event pairs, 646 based on Foata normal form. 18/3264 useless extension candidates. Maximal degree in co-relation 19222. Up to 2443 conditions per place. [2024-06-27 19:37:39,792 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 143 selfloop transitions, 69 changer transitions 12/231 dead transitions. [2024-06-27 19:37:39,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 231 transitions, 2259 flow [2024-06-27 19:37:39,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:37:39,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:37:39,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-27 19:37:39,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-06-27 19:37:39,793 INFO L175 Difference]: Start difference. First operand has 234 places, 185 transitions, 1499 flow. Second operand 11 states and 247 transitions. [2024-06-27 19:37:39,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 231 transitions, 2259 flow [2024-06-27 19:37:40,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 231 transitions, 2123 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:37:40,553 INFO L231 Difference]: Finished difference. Result has 235 places, 183 transitions, 1495 flow [2024-06-27 19:37:40,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1495, PETRI_PLACES=235, PETRI_TRANSITIONS=183} [2024-06-27 19:37:40,554 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 195 predicate places. [2024-06-27 19:37:40,554 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 183 transitions, 1495 flow [2024-06-27 19:37:40,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:40,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:40,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:40,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 19:37:40,554 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)] === [2024-06-27 19:37:40,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:40,554 INFO L85 PathProgramCache]: Analyzing trace with hash 326439177, now seen corresponding path program 3 times [2024-06-27 19:37:40,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:40,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073643615] [2024-06-27 19:37:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:40,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:40,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:40,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073643615] [2024-06-27 19:37:40,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073643615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:40,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:40,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:40,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284985883] [2024-06-27 19:37:40,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:40,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:40,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:40,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:40,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:40,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:40,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 183 transitions, 1495 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:40,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:40,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:40,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:41,052 INFO L124 PetriNetUnfolderBase]: 1652/2867 cut-off events. [2024-06-27 19:37:41,052 INFO L125 PetriNetUnfolderBase]: For 247058/247058 co-relation queries the response was YES. [2024-06-27 19:37:41,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15015 conditions, 2867 events. 1652/2867 cut-off events. For 247058/247058 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 17788 event pairs, 546 based on Foata normal form. 18/2875 useless extension candidates. Maximal degree in co-relation 14911. Up to 2257 conditions per place. [2024-06-27 19:37:41,075 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 127 selfloop transitions, 65 changer transitions 19/218 dead transitions. [2024-06-27 19:37:41,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 218 transitions, 2033 flow [2024-06-27 19:37:41,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:41,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:41,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-27 19:37:41,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5868945868945868 [2024-06-27 19:37:41,076 INFO L175 Difference]: Start difference. First operand has 235 places, 183 transitions, 1495 flow. Second operand 9 states and 206 transitions. [2024-06-27 19:37:41,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 218 transitions, 2033 flow [2024-06-27 19:37:41,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 218 transitions, 1892 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 19:37:41,653 INFO L231 Difference]: Finished difference. Result has 232 places, 179 transitions, 1452 flow [2024-06-27 19:37:41,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1354, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1452, PETRI_PLACES=232, PETRI_TRANSITIONS=179} [2024-06-27 19:37:41,653 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 192 predicate places. [2024-06-27 19:37:41,653 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 179 transitions, 1452 flow [2024-06-27 19:37:41,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:41,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:41,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:41,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 19:37:41,653 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)] === [2024-06-27 19:37:41,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:41,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1064106429, now seen corresponding path program 4 times [2024-06-27 19:37:41,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:41,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108439801] [2024-06-27 19:37:41,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:41,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:41,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:41,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108439801] [2024-06-27 19:37:41,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108439801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:41,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:41,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:41,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508136646] [2024-06-27 19:37:41,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:41,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:41,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:41,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:41,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:41,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:41,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 179 transitions, 1452 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:41,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:41,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:41,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:42,143 INFO L124 PetriNetUnfolderBase]: 1763/3044 cut-off events. [2024-06-27 19:37:42,144 INFO L125 PetriNetUnfolderBase]: For 329778/329778 co-relation queries the response was YES. [2024-06-27 19:37:42,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17426 conditions, 3044 events. 1763/3044 cut-off events. For 329778/329778 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 19159 event pairs, 629 based on Foata normal form. 24/3066 useless extension candidates. Maximal degree in co-relation 17323. Up to 2325 conditions per place. [2024-06-27 19:37:42,166 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 137 selfloop transitions, 56 changer transitions 11/211 dead transitions. [2024-06-27 19:37:42,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 211 transitions, 2124 flow [2024-06-27 19:37:42,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:42,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:42,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 19:37:42,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5783475783475783 [2024-06-27 19:37:42,167 INFO L175 Difference]: Start difference. First operand has 232 places, 179 transitions, 1452 flow. Second operand 9 states and 203 transitions. [2024-06-27 19:37:42,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 211 transitions, 2124 flow [2024-06-27 19:37:42,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 211 transitions, 1980 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 19:37:42,667 INFO L231 Difference]: Finished difference. Result has 225 places, 175 transitions, 1401 flow [2024-06-27 19:37:42,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1401, PETRI_PLACES=225, PETRI_TRANSITIONS=175} [2024-06-27 19:37:42,667 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 185 predicate places. [2024-06-27 19:37:42,667 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 175 transitions, 1401 flow [2024-06-27 19:37:42,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:42,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:42,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:42,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 19:37:42,668 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)] === [2024-06-27 19:37:42,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:42,668 INFO L85 PathProgramCache]: Analyzing trace with hash 549097987, now seen corresponding path program 5 times [2024-06-27 19:37:42,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:42,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698835822] [2024-06-27 19:37:42,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:42,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:42,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:42,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:42,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698835822] [2024-06-27 19:37:42,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698835822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:42,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:42,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:42,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289332547] [2024-06-27 19:37:42,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:42,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:42,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:42,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:42,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:42,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:42,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 175 transitions, 1401 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:42,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:42,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:42,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:43,112 INFO L124 PetriNetUnfolderBase]: 1611/2794 cut-off events. [2024-06-27 19:37:43,113 INFO L125 PetriNetUnfolderBase]: For 249604/249604 co-relation queries the response was YES. [2024-06-27 19:37:43,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14481 conditions, 2794 events. 1611/2794 cut-off events. For 249604/249604 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 17328 event pairs, 594 based on Foata normal form. 26/2818 useless extension candidates. Maximal degree in co-relation 14381. Up to 2325 conditions per place. [2024-06-27 19:37:43,133 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 128 selfloop transitions, 53 changer transitions 12/200 dead transitions. [2024-06-27 19:37:43,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 200 transitions, 1867 flow [2024-06-27 19:37:43,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:43,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-27 19:37:43,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584045584045584 [2024-06-27 19:37:43,134 INFO L175 Difference]: Start difference. First operand has 225 places, 175 transitions, 1401 flow. Second operand 9 states and 196 transitions. [2024-06-27 19:37:43,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 200 transitions, 1867 flow [2024-06-27 19:37:43,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 200 transitions, 1752 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 19:37:43,708 INFO L231 Difference]: Finished difference. Result has 222 places, 171 transitions, 1371 flow [2024-06-27 19:37:43,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1371, PETRI_PLACES=222, PETRI_TRANSITIONS=171} [2024-06-27 19:37:43,708 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 182 predicate places. [2024-06-27 19:37:43,708 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 171 transitions, 1371 flow [2024-06-27 19:37:43,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:43,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:43,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:43,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 19:37:43,709 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)] === [2024-06-27 19:37:43,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:43,709 INFO L85 PathProgramCache]: Analyzing trace with hash 300416957, now seen corresponding path program 6 times [2024-06-27 19:37:43,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:43,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519824657] [2024-06-27 19:37:43,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:43,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:43,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:43,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519824657] [2024-06-27 19:37:43,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519824657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:43,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:43,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:43,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144348636] [2024-06-27 19:37:43,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:43,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:43,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:43,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:43,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:43,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:43,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 171 transitions, 1371 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:43,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:43,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:43,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:44,148 INFO L124 PetriNetUnfolderBase]: 1596/2787 cut-off events. [2024-06-27 19:37:44,148 INFO L125 PetriNetUnfolderBase]: For 230840/230840 co-relation queries the response was YES. [2024-06-27 19:37:44,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14261 conditions, 2787 events. 1596/2787 cut-off events. For 230840/230840 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 17389 event pairs, 558 based on Foata normal form. 24/2809 useless extension candidates. Maximal degree in co-relation 14163. Up to 2277 conditions per place. [2024-06-27 19:37:44,168 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 126 selfloop transitions, 50 changer transitions 17/200 dead transitions. [2024-06-27 19:37:44,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 200 transitions, 1861 flow [2024-06-27 19:37:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:44,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:44,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-27 19:37:44,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612535612535613 [2024-06-27 19:37:44,169 INFO L175 Difference]: Start difference. First operand has 222 places, 171 transitions, 1371 flow. Second operand 9 states and 197 transitions. [2024-06-27 19:37:44,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 200 transitions, 1861 flow [2024-06-27 19:37:44,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 200 transitions, 1751 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:44,641 INFO L231 Difference]: Finished difference. Result has 219 places, 167 transitions, 1336 flow [2024-06-27 19:37:44,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1336, PETRI_PLACES=219, PETRI_TRANSITIONS=167} [2024-06-27 19:37:44,641 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 179 predicate places. [2024-06-27 19:37:44,641 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 167 transitions, 1336 flow [2024-06-27 19:37:44,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:44,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:44,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:44,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 19:37:44,642 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)] === [2024-06-27 19:37:44,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:44,642 INFO L85 PathProgramCache]: Analyzing trace with hash 295832987, now seen corresponding path program 7 times [2024-06-27 19:37:44,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:44,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658978026] [2024-06-27 19:37:44,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:44,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:44,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:44,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658978026] [2024-06-27 19:37:44,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658978026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:44,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:44,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:44,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37100953] [2024-06-27 19:37:44,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:44,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:44,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:44,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:44,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:44,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:44,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 167 transitions, 1336 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:44,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:44,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:44,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:45,105 INFO L124 PetriNetUnfolderBase]: 1624/2831 cut-off events. [2024-06-27 19:37:45,105 INFO L125 PetriNetUnfolderBase]: For 252705/252705 co-relation queries the response was YES. [2024-06-27 19:37:45,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15492 conditions, 2831 events. 1624/2831 cut-off events. For 252705/252705 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 17610 event pairs, 550 based on Foata normal form. 18/2847 useless extension candidates. Maximal degree in co-relation 15395. Up to 2199 conditions per place. [2024-06-27 19:37:45,126 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 134 selfloop transitions, 51 changer transitions 8/200 dead transitions. [2024-06-27 19:37:45,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 200 transitions, 1968 flow [2024-06-27 19:37:45,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:45,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:45,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-27 19:37:45,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698005698005698 [2024-06-27 19:37:45,127 INFO L175 Difference]: Start difference. First operand has 219 places, 167 transitions, 1336 flow. Second operand 9 states and 200 transitions. [2024-06-27 19:37:45,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 200 transitions, 1968 flow [2024-06-27 19:37:45,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 200 transitions, 1856 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:45,616 INFO L231 Difference]: Finished difference. Result has 215 places, 165 transitions, 1321 flow [2024-06-27 19:37:45,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1321, PETRI_PLACES=215, PETRI_TRANSITIONS=165} [2024-06-27 19:37:45,617 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 175 predicate places. [2024-06-27 19:37:45,617 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 165 transitions, 1321 flow [2024-06-27 19:37:45,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:45,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:45,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:45,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 19:37:45,617 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)] === [2024-06-27 19:37:45,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:45,617 INFO L85 PathProgramCache]: Analyzing trace with hash 384531627, now seen corresponding path program 8 times [2024-06-27 19:37:45,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:45,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263780456] [2024-06-27 19:37:45,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:45,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:45,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:45,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263780456] [2024-06-27 19:37:45,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263780456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:45,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:45,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:45,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415815486] [2024-06-27 19:37:45,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:45,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:45,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:45,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:45,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:45,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:45,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 165 transitions, 1321 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:45,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:45,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:45,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:46,066 INFO L124 PetriNetUnfolderBase]: 1519/2658 cut-off events. [2024-06-27 19:37:46,066 INFO L125 PetriNetUnfolderBase]: For 197374/197374 co-relation queries the response was YES. [2024-06-27 19:37:46,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13594 conditions, 2658 events. 1519/2658 cut-off events. For 197374/197374 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 16393 event pairs, 542 based on Foata normal form. 18/2674 useless extension candidates. Maximal degree in co-relation 13499. Up to 2199 conditions per place. [2024-06-27 19:37:46,085 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 118 selfloop transitions, 47 changer transitions 21/193 dead transitions. [2024-06-27 19:37:46,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 193 transitions, 1777 flow [2024-06-27 19:37:46,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:46,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:46,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-27 19:37:46,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527065527065527 [2024-06-27 19:37:46,086 INFO L175 Difference]: Start difference. First operand has 215 places, 165 transitions, 1321 flow. Second operand 9 states and 194 transitions. [2024-06-27 19:37:46,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 193 transitions, 1777 flow [2024-06-27 19:37:46,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 193 transitions, 1672 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:46,495 INFO L231 Difference]: Finished difference. Result has 214 places, 160 transitions, 1269 flow [2024-06-27 19:37:46,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1269, PETRI_PLACES=214, PETRI_TRANSITIONS=160} [2024-06-27 19:37:46,495 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 174 predicate places. [2024-06-27 19:37:46,495 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 160 transitions, 1269 flow [2024-06-27 19:37:46,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:46,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:46,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:46,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 19:37:46,496 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)] === [2024-06-27 19:37:46,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:46,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2097324885, now seen corresponding path program 9 times [2024-06-27 19:37:46,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:46,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284151785] [2024-06-27 19:37:46,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:46,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:46,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:46,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:46,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284151785] [2024-06-27 19:37:46,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284151785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:46,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:46,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:46,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649971504] [2024-06-27 19:37:46,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:46,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:46,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:46,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:46,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:46,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:46,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 160 transitions, 1269 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:46,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:46,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:46,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:46,926 INFO L124 PetriNetUnfolderBase]: 1650/2886 cut-off events. [2024-06-27 19:37:46,926 INFO L125 PetriNetUnfolderBase]: For 270718/270718 co-relation queries the response was YES. [2024-06-27 19:37:46,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16501 conditions, 2886 events. 1650/2886 cut-off events. For 270718/270718 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 18172 event pairs, 616 based on Foata normal form. 18/2903 useless extension candidates. Maximal degree in co-relation 16407. Up to 2115 conditions per place. [2024-06-27 19:37:46,948 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 165 selfloop transitions, 13 changer transitions 8/193 dead transitions. [2024-06-27 19:37:46,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 193 transitions, 2021 flow [2024-06-27 19:37:46,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:46,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:46,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-27 19:37:46,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-27 19:37:46,949 INFO L175 Difference]: Start difference. First operand has 214 places, 160 transitions, 1269 flow. Second operand 9 states and 195 transitions. [2024-06-27 19:37:46,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 193 transitions, 2021 flow [2024-06-27 19:37:47,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 193 transitions, 1901 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:47,396 INFO L231 Difference]: Finished difference. Result has 206 places, 158 transitions, 1181 flow [2024-06-27 19:37:47,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1181, PETRI_PLACES=206, PETRI_TRANSITIONS=158} [2024-06-27 19:37:47,396 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 166 predicate places. [2024-06-27 19:37:47,396 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 158 transitions, 1181 flow [2024-06-27 19:37:47,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:47,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:47,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:47,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-27 19:37:47,396 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)] === [2024-06-27 19:37:47,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:47,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1831896833, now seen corresponding path program 10 times [2024-06-27 19:37:47,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:47,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111442990] [2024-06-27 19:37:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:47,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:47,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:47,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111442990] [2024-06-27 19:37:47,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111442990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:47,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:47,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:47,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945142019] [2024-06-27 19:37:47,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:47,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:47,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:47,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:47,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:47,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:47,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 158 transitions, 1181 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:47,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:47,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:47,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:47,805 INFO L124 PetriNetUnfolderBase]: 1545/2689 cut-off events. [2024-06-27 19:37:47,805 INFO L125 PetriNetUnfolderBase]: For 211462/211462 co-relation queries the response was YES. [2024-06-27 19:37:47,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14444 conditions, 2689 events. 1545/2689 cut-off events. For 211462/211462 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 16510 event pairs, 555 based on Foata normal form. 18/2706 useless extension candidates. Maximal degree in co-relation 14353. Up to 2115 conditions per place. [2024-06-27 19:37:47,823 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 159 selfloop transitions, 12 changer transitions 10/188 dead transitions. [2024-06-27 19:37:47,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 188 transitions, 1773 flow [2024-06-27 19:37:47,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:47,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:47,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-27 19:37:47,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470085470085471 [2024-06-27 19:37:47,824 INFO L175 Difference]: Start difference. First operand has 206 places, 158 transitions, 1181 flow. Second operand 9 states and 192 transitions. [2024-06-27 19:37:47,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 188 transitions, 1773 flow [2024-06-27 19:37:48,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 188 transitions, 1740 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:48,279 INFO L231 Difference]: Finished difference. Result has 205 places, 154 transitions, 1146 flow [2024-06-27 19:37:48,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1146, PETRI_PLACES=205, PETRI_TRANSITIONS=154} [2024-06-27 19:37:48,279 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 165 predicate places. [2024-06-27 19:37:48,279 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 154 transitions, 1146 flow [2024-06-27 19:37:48,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:48,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:48,279 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, 1] [2024-06-27 19:37:48,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-27 19:37:48,280 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)] === [2024-06-27 19:37:48,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:48,280 INFO L85 PathProgramCache]: Analyzing trace with hash 464846019, now seen corresponding path program 11 times [2024-06-27 19:37:48,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:48,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094316363] [2024-06-27 19:37:48,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:48,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:48,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:48,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094316363] [2024-06-27 19:37:48,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094316363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:48,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:48,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:48,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253105493] [2024-06-27 19:37:48,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:48,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:48,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:48,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:48,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:48,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:48,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 154 transitions, 1146 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:48,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:48,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:48,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:48,693 INFO L124 PetriNetUnfolderBase]: 1518/2642 cut-off events. [2024-06-27 19:37:48,693 INFO L125 PetriNetUnfolderBase]: For 204301/204301 co-relation queries the response was YES. [2024-06-27 19:37:48,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14187 conditions, 2642 events. 1518/2642 cut-off events. For 204301/204301 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 16164 event pairs, 519 based on Foata normal form. 18/2659 useless extension candidates. Maximal degree in co-relation 14097. Up to 2115 conditions per place. [2024-06-27 19:37:48,712 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 158 selfloop transitions, 11 changer transitions 8/184 dead transitions. [2024-06-27 19:37:48,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 184 transitions, 1730 flow [2024-06-27 19:37:48,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:48,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:48,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 19:37:48,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-27 19:37:48,713 INFO L175 Difference]: Start difference. First operand has 205 places, 154 transitions, 1146 flow. Second operand 9 states and 189 transitions. [2024-06-27 19:37:48,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 184 transitions, 1730 flow [2024-06-27 19:37:49,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 184 transitions, 1702 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:49,095 INFO L231 Difference]: Finished difference. Result has 201 places, 152 transitions, 1122 flow [2024-06-27 19:37:49,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1122, PETRI_PLACES=201, PETRI_TRANSITIONS=152} [2024-06-27 19:37:49,096 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 161 predicate places. [2024-06-27 19:37:49,096 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 152 transitions, 1122 flow [2024-06-27 19:37:49,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:49,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:49,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:49,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-27 19:37:49,097 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)] === [2024-06-27 19:37:49,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:49,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1040802427, now seen corresponding path program 12 times [2024-06-27 19:37:49,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:49,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291397037] [2024-06-27 19:37:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:49,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:49,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:49,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:49,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291397037] [2024-06-27 19:37:49,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291397037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:49,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:49,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:49,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144345373] [2024-06-27 19:37:49,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:49,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:49,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:49,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:49,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:49,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:49,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 152 transitions, 1122 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:49,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:49,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:49,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:49,473 INFO L124 PetriNetUnfolderBase]: 1413/2455 cut-off events. [2024-06-27 19:37:49,474 INFO L125 PetriNetUnfolderBase]: For 169435/169435 co-relation queries the response was YES. [2024-06-27 19:37:49,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12464 conditions, 2455 events. 1413/2455 cut-off events. For 169435/169435 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 14745 event pairs, 501 based on Foata normal form. 18/2472 useless extension candidates. Maximal degree in co-relation 12375. Up to 2115 conditions per place. [2024-06-27 19:37:49,489 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 138 selfloop transitions, 6 changer transitions 26/177 dead transitions. [2024-06-27 19:37:49,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 177 transitions, 1542 flow [2024-06-27 19:37:49,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:49,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:49,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-27 19:37:49,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213675213675214 [2024-06-27 19:37:49,490 INFO L175 Difference]: Start difference. First operand has 201 places, 152 transitions, 1122 flow. Second operand 9 states and 183 transitions. [2024-06-27 19:37:49,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 177 transitions, 1542 flow [2024-06-27 19:37:49,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 177 transitions, 1517 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:49,856 INFO L231 Difference]: Finished difference. Result has 200 places, 146 transitions, 1061 flow [2024-06-27 19:37:49,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1061, PETRI_PLACES=200, PETRI_TRANSITIONS=146} [2024-06-27 19:37:49,856 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 160 predicate places. [2024-06-27 19:37:49,857 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 146 transitions, 1061 flow [2024-06-27 19:37:49,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:49,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:49,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:49,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-27 19:37:49,857 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)] === [2024-06-27 19:37:49,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:49,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1802863969, now seen corresponding path program 11 times [2024-06-27 19:37:49,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:49,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167483134] [2024-06-27 19:37:49,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:49,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:49,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:49,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167483134] [2024-06-27 19:37:49,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167483134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:49,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:49,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:49,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813845445] [2024-06-27 19:37:49,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:49,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:49,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:49,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:49,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:49,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:49,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 146 transitions, 1061 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:49,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:49,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:49,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:50,262 INFO L124 PetriNetUnfolderBase]: 1459/2520 cut-off events. [2024-06-27 19:37:50,262 INFO L125 PetriNetUnfolderBase]: For 204225/204225 co-relation queries the response was YES. [2024-06-27 19:37:50,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13662 conditions, 2520 events. 1459/2520 cut-off events. For 204225/204225 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 15232 event pairs, 500 based on Foata normal form. 18/2527 useless extension candidates. Maximal degree in co-relation 13574. Up to 1759 conditions per place. [2024-06-27 19:37:50,279 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 108 selfloop transitions, 60 changer transitions 8/183 dead transitions. [2024-06-27 19:37:50,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 183 transitions, 1671 flow [2024-06-27 19:37:50,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:50,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:50,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 19:37:50,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5954415954415955 [2024-06-27 19:37:50,279 INFO L175 Difference]: Start difference. First operand has 200 places, 146 transitions, 1061 flow. Second operand 9 states and 209 transitions. [2024-06-27 19:37:50,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 183 transitions, 1671 flow [2024-06-27 19:37:50,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 183 transitions, 1639 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:50,613 INFO L231 Difference]: Finished difference. Result has 190 places, 144 transitions, 1141 flow [2024-06-27 19:37:50,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1141, PETRI_PLACES=190, PETRI_TRANSITIONS=144} [2024-06-27 19:37:50,614 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 150 predicate places. [2024-06-27 19:37:50,614 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 144 transitions, 1141 flow [2024-06-27 19:37:50,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:50,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:50,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:50,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-27 19:37:50,614 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)] === [2024-06-27 19:37:50,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:50,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1992610195, now seen corresponding path program 12 times [2024-06-27 19:37:50,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:50,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068103010] [2024-06-27 19:37:50,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:50,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:50,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:50,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:50,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068103010] [2024-06-27 19:37:50,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068103010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:50,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:50,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:50,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351105498] [2024-06-27 19:37:50,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:50,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:50,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:50,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:50,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:50,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:50,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 144 transitions, 1141 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:50,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:50,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:50,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:51,008 INFO L124 PetriNetUnfolderBase]: 1354/2347 cut-off events. [2024-06-27 19:37:51,008 INFO L125 PetriNetUnfolderBase]: For 169469/169469 co-relation queries the response was YES. [2024-06-27 19:37:51,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12209 conditions, 2347 events. 1354/2347 cut-off events. For 169469/169469 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14003 event pairs, 500 based on Foata normal form. 18/2356 useless extension candidates. Maximal degree in co-relation 12124. Up to 1759 conditions per place. [2024-06-27 19:37:51,023 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 93 selfloop transitions, 57 changer transitions 19/176 dead transitions. [2024-06-27 19:37:51,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 176 transitions, 1589 flow [2024-06-27 19:37:51,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:51,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:51,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 19:37:51,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5783475783475783 [2024-06-27 19:37:51,024 INFO L175 Difference]: Start difference. First operand has 190 places, 144 transitions, 1141 flow. Second operand 9 states and 203 transitions. [2024-06-27 19:37:51,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 176 transitions, 1589 flow [2024-06-27 19:37:51,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 176 transitions, 1466 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:51,464 INFO L231 Difference]: Finished difference. Result has 189 places, 140 transitions, 1101 flow [2024-06-27 19:37:51,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1101, PETRI_PLACES=189, PETRI_TRANSITIONS=140} [2024-06-27 19:37:51,464 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 149 predicate places. [2024-06-27 19:37:51,464 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 140 transitions, 1101 flow [2024-06-27 19:37:51,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:51,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:51,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:51,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-27 19:37:51,465 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)] === [2024-06-27 19:37:51,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:51,465 INFO L85 PathProgramCache]: Analyzing trace with hash -937195189, now seen corresponding path program 13 times [2024-06-27 19:37:51,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:51,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81446749] [2024-06-27 19:37:51,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:51,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:51,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:51,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81446749] [2024-06-27 19:37:51,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81446749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:51,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:51,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:51,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361451742] [2024-06-27 19:37:51,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:51,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:51,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:51,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:51,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:51,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:51,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 140 transitions, 1101 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:51,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:51,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:51,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:51,866 INFO L124 PetriNetUnfolderBase]: 1465/2530 cut-off events. [2024-06-27 19:37:51,866 INFO L125 PetriNetUnfolderBase]: For 223830/223830 co-relation queries the response was YES. [2024-06-27 19:37:51,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14285 conditions, 2530 events. 1465/2530 cut-off events. For 223830/223830 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 15350 event pairs, 580 based on Foata normal form. 24/2551 useless extension candidates. Maximal degree in co-relation 14201. Up to 1885 conditions per place. [2024-06-27 19:37:51,883 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 105 selfloop transitions, 47 changer transitions 10/169 dead transitions. [2024-06-27 19:37:51,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 169 transitions, 1655 flow [2024-06-27 19:37:51,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:51,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:51,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-27 19:37:51,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811965811965812 [2024-06-27 19:37:51,884 INFO L175 Difference]: Start difference. First operand has 189 places, 140 transitions, 1101 flow. Second operand 9 states and 204 transitions. [2024-06-27 19:37:51,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 169 transitions, 1655 flow [2024-06-27 19:37:52,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 169 transitions, 1527 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 19:37:52,261 INFO L231 Difference]: Finished difference. Result has 182 places, 137 transitions, 1053 flow [2024-06-27 19:37:52,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1053, PETRI_PLACES=182, PETRI_TRANSITIONS=137} [2024-06-27 19:37:52,261 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 142 predicate places. [2024-06-27 19:37:52,261 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 137 transitions, 1053 flow [2024-06-27 19:37:52,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:52,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:52,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:52,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-27 19:37:52,262 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)] === [2024-06-27 19:37:52,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:52,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1425940669, now seen corresponding path program 14 times [2024-06-27 19:37:52,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:52,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132613951] [2024-06-27 19:37:52,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:52,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:52,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:52,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132613951] [2024-06-27 19:37:52,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132613951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:52,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:52,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:52,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010347750] [2024-06-27 19:37:52,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:52,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:52,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:52,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:52,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:52,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:52,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 137 transitions, 1053 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:52,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:52,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:52,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:52,651 INFO L124 PetriNetUnfolderBase]: 1441/2478 cut-off events. [2024-06-27 19:37:52,651 INFO L125 PetriNetUnfolderBase]: For 213827/213827 co-relation queries the response was YES. [2024-06-27 19:37:52,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13856 conditions, 2478 events. 1441/2478 cut-off events. For 213827/213827 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 14998 event pairs, 612 based on Foata normal form. 26/2501 useless extension candidates. Maximal degree in co-relation 13775. Up to 2096 conditions per place. [2024-06-27 19:37:52,668 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 96 selfloop transitions, 43 changer transitions 13/159 dead transitions. [2024-06-27 19:37:52,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 159 transitions, 1429 flow [2024-06-27 19:37:52,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:52,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-27 19:37:52,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669515669515669 [2024-06-27 19:37:52,669 INFO L175 Difference]: Start difference. First operand has 182 places, 137 transitions, 1053 flow. Second operand 9 states and 199 transitions. [2024-06-27 19:37:52,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 159 transitions, 1429 flow [2024-06-27 19:37:52,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 159 transitions, 1337 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:52,932 INFO L231 Difference]: Finished difference. Result has 181 places, 132 transitions, 1019 flow [2024-06-27 19:37:52,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=961, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1019, PETRI_PLACES=181, PETRI_TRANSITIONS=132} [2024-06-27 19:37:52,932 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 141 predicate places. [2024-06-27 19:37:52,932 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 132 transitions, 1019 flow [2024-06-27 19:37:52,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:52,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:52,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:52,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-27 19:37:52,932 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)] === [2024-06-27 19:37:52,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:52,933 INFO L85 PathProgramCache]: Analyzing trace with hash 52015785, now seen corresponding path program 15 times [2024-06-27 19:37:52,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:52,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013025180] [2024-06-27 19:37:52,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:52,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:53,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:53,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:53,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013025180] [2024-06-27 19:37:53,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013025180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:53,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:53,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:53,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359553411] [2024-06-27 19:37:53,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:53,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:53,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:53,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:53,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:53,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:53,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 132 transitions, 1019 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:53,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:53,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:53,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:53,390 INFO L124 PetriNetUnfolderBase]: 1519/2632 cut-off events. [2024-06-27 19:37:53,391 INFO L125 PetriNetUnfolderBase]: For 234207/234207 co-relation queries the response was YES. [2024-06-27 19:37:53,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15537 conditions, 2632 events. 1519/2632 cut-off events. For 234207/234207 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 16204 event pairs, 586 based on Foata normal form. 18/2647 useless extension candidates. Maximal degree in co-relation 15457. Up to 1759 conditions per place. [2024-06-27 19:37:53,408 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 108 selfloop transitions, 45 changer transitions 8/168 dead transitions. [2024-06-27 19:37:53,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 168 transitions, 1709 flow [2024-06-27 19:37:53,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:37:53,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:37:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-27 19:37:53,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5794871794871795 [2024-06-27 19:37:53,408 INFO L175 Difference]: Start difference. First operand has 181 places, 132 transitions, 1019 flow. Second operand 10 states and 226 transitions. [2024-06-27 19:37:53,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 168 transitions, 1709 flow [2024-06-27 19:37:53,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 168 transitions, 1605 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 19:37:53,726 INFO L231 Difference]: Finished difference. Result has 178 places, 130 transitions, 1006 flow [2024-06-27 19:37:53,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1006, PETRI_PLACES=178, PETRI_TRANSITIONS=130} [2024-06-27 19:37:53,727 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 138 predicate places. [2024-06-27 19:37:53,727 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 130 transitions, 1006 flow [2024-06-27 19:37:53,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:53,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:53,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:53,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-27 19:37:53,727 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)] === [2024-06-27 19:37:53,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:53,727 INFO L85 PathProgramCache]: Analyzing trace with hash -2008103349, now seen corresponding path program 16 times [2024-06-27 19:37:53,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:53,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915026337] [2024-06-27 19:37:53,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:53,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:53,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:53,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915026337] [2024-06-27 19:37:53,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915026337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:53,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:53,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:53,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877834942] [2024-06-27 19:37:53,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:53,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:53,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:53,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:53,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:53,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:53,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 130 transitions, 1006 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:53,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:53,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:53,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:54,124 INFO L124 PetriNetUnfolderBase]: 1495/2586 cut-off events. [2024-06-27 19:37:54,124 INFO L125 PetriNetUnfolderBase]: For 219061/219061 co-relation queries the response was YES. [2024-06-27 19:37:54,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15197 conditions, 2586 events. 1495/2586 cut-off events. For 219061/219061 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 15793 event pairs, 652 based on Foata normal form. 18/2601 useless extension candidates. Maximal degree in co-relation 15119. Up to 1759 conditions per place. [2024-06-27 19:37:54,141 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 100 selfloop transitions, 42 changer transitions 13/162 dead transitions. [2024-06-27 19:37:54,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 162 transitions, 1542 flow [2024-06-27 19:37:54,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:37:54,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:37:54,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-27 19:37:54,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5692307692307692 [2024-06-27 19:37:54,142 INFO L175 Difference]: Start difference. First operand has 178 places, 130 transitions, 1006 flow. Second operand 10 states and 222 transitions. [2024-06-27 19:37:54,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 162 transitions, 1542 flow [2024-06-27 19:37:54,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 162 transitions, 1446 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 19:37:54,464 INFO L231 Difference]: Finished difference. Result has 177 places, 127 transitions, 977 flow [2024-06-27 19:37:54,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=977, PETRI_PLACES=177, PETRI_TRANSITIONS=127} [2024-06-27 19:37:54,464 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 137 predicate places. [2024-06-27 19:37:54,464 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 127 transitions, 977 flow [2024-06-27 19:37:54,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:54,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:54,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:54,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-27 19:37:54,465 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)] === [2024-06-27 19:37:54,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:54,465 INFO L85 PathProgramCache]: Analyzing trace with hash 719527195, now seen corresponding path program 17 times [2024-06-27 19:37:54,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:54,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941914693] [2024-06-27 19:37:54,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:54,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:54,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:54,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941914693] [2024-06-27 19:37:54,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941914693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:54,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:54,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:54,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480866125] [2024-06-27 19:37:54,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:54,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:54,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:54,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:54,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:54,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:54,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 127 transitions, 977 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:54,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:54,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:54,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:54,850 INFO L124 PetriNetUnfolderBase]: 1375/2380 cut-off events. [2024-06-27 19:37:54,851 INFO L125 PetriNetUnfolderBase]: For 183634/183634 co-relation queries the response was YES. [2024-06-27 19:37:54,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13116 conditions, 2380 events. 1375/2380 cut-off events. For 183634/183634 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 14306 event pairs, 564 based on Foata normal form. 24/2401 useless extension candidates. Maximal degree in co-relation 13039. Up to 1759 conditions per place. [2024-06-27 19:37:54,865 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 99 selfloop transitions, 41 changer transitions 10/157 dead transitions. [2024-06-27 19:37:54,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 157 transitions, 1497 flow [2024-06-27 19:37:54,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:37:54,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:37:54,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-27 19:37:54,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.558974358974359 [2024-06-27 19:37:54,866 INFO L175 Difference]: Start difference. First operand has 177 places, 127 transitions, 977 flow. Second operand 10 states and 218 transitions. [2024-06-27 19:37:54,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 157 transitions, 1497 flow [2024-06-27 19:37:55,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 157 transitions, 1406 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 19:37:55,101 INFO L231 Difference]: Finished difference. Result has 174 places, 124 transitions, 953 flow [2024-06-27 19:37:55,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=953, PETRI_PLACES=174, PETRI_TRANSITIONS=124} [2024-06-27 19:37:55,102 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 134 predicate places. [2024-06-27 19:37:55,102 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 124 transitions, 953 flow [2024-06-27 19:37:55,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:55,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:55,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:55,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-27 19:37:55,102 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)] === [2024-06-27 19:37:55,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:55,102 INFO L85 PathProgramCache]: Analyzing trace with hash 56430495, now seen corresponding path program 18 times [2024-06-27 19:37:55,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:55,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042805363] [2024-06-27 19:37:55,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:55,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:55,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:55,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:55,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042805363] [2024-06-27 19:37:55,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042805363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:55,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:55,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:55,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334727334] [2024-06-27 19:37:55,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:55,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:55,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:55,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:55,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:55,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:55,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 124 transitions, 953 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:55,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:55,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:55,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:55,476 INFO L124 PetriNetUnfolderBase]: 1224/2123 cut-off events. [2024-06-27 19:37:55,476 INFO L125 PetriNetUnfolderBase]: For 136438/136438 co-relation queries the response was YES. [2024-06-27 19:37:55,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10714 conditions, 2123 events. 1224/2123 cut-off events. For 136438/136438 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 12432 event pairs, 519 based on Foata normal form. 26/2146 useless extension candidates. Maximal degree in co-relation 10639. Up to 1759 conditions per place. [2024-06-27 19:37:55,486 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 85 selfloop transitions, 34 changer transitions 20/146 dead transitions. [2024-06-27 19:37:55,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 146 transitions, 1303 flow [2024-06-27 19:37:55,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:55,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:55,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-27 19:37:55,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5498575498575499 [2024-06-27 19:37:55,487 INFO L175 Difference]: Start difference. First operand has 174 places, 124 transitions, 953 flow. Second operand 9 states and 193 transitions. [2024-06-27 19:37:55,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 146 transitions, 1303 flow [2024-06-27 19:37:55,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 146 transitions, 1220 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 19:37:55,722 INFO L231 Difference]: Finished difference. Result has 171 places, 117 transitions, 887 flow [2024-06-27 19:37:55,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=887, PETRI_PLACES=171, PETRI_TRANSITIONS=117} [2024-06-27 19:37:55,723 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 131 predicate places. [2024-06-27 19:37:55,723 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 117 transitions, 887 flow [2024-06-27 19:37:55,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:55,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:55,723 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, 1] [2024-06-27 19:37:55,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-27 19:37:55,723 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)] === [2024-06-27 19:37:55,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:55,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1958135733, now seen corresponding path program 19 times [2024-06-27 19:37:55,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:55,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164968533] [2024-06-27 19:37:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:55,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:55,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:55,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164968533] [2024-06-27 19:37:55,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164968533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:55,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:55,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:55,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422601211] [2024-06-27 19:37:55,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:55,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:55,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:55,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:55,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:55,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:55,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 117 transitions, 887 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:55,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:55,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:55,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:56,070 INFO L124 PetriNetUnfolderBase]: 1297/2249 cut-off events. [2024-06-27 19:37:56,070 INFO L125 PetriNetUnfolderBase]: For 153224/153224 co-relation queries the response was YES. [2024-06-27 19:37:56,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12182 conditions, 2249 events. 1297/2249 cut-off events. For 153224/153224 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 13424 event pairs, 353 based on Foata normal form. 18/2266 useless extension candidates. Maximal degree in co-relation 12108. Up to 1110 conditions per place. [2024-06-27 19:37:56,083 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 82 selfloop transitions, 45 changer transitions 16/150 dead transitions. [2024-06-27 19:37:56,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 150 transitions, 1407 flow [2024-06-27 19:37:56,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:56,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:56,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 19:37:56,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801282051282052 [2024-06-27 19:37:56,085 INFO L175 Difference]: Start difference. First operand has 171 places, 117 transitions, 887 flow. Second operand 8 states and 181 transitions. [2024-06-27 19:37:56,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 150 transitions, 1407 flow [2024-06-27 19:37:56,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 150 transitions, 1321 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:56,251 INFO L231 Difference]: Finished difference. Result has 160 places, 114 transitions, 878 flow [2024-06-27 19:37:56,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=878, PETRI_PLACES=160, PETRI_TRANSITIONS=114} [2024-06-27 19:37:56,251 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 120 predicate places. [2024-06-27 19:37:56,251 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 114 transitions, 878 flow [2024-06-27 19:37:56,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:56,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:56,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:56,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-27 19:37:56,251 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)] === [2024-06-27 19:37:56,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:56,252 INFO L85 PathProgramCache]: Analyzing trace with hash -602768169, now seen corresponding path program 20 times [2024-06-27 19:37:56,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:56,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548901088] [2024-06-27 19:37:56,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:56,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:56,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:56,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548901088] [2024-06-27 19:37:56,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548901088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:56,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:56,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:56,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467889754] [2024-06-27 19:37:56,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:56,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:56,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:56,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:56,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:56,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:56,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 114 transitions, 878 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:56,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:56,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:56,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:56,623 INFO L124 PetriNetUnfolderBase]: 1307/2273 cut-off events. [2024-06-27 19:37:56,624 INFO L125 PetriNetUnfolderBase]: For 158309/158309 co-relation queries the response was YES. [2024-06-27 19:37:56,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12970 conditions, 2273 events. 1307/2273 cut-off events. For 158309/158309 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 13651 event pairs, 305 based on Foata normal form. 18/2288 useless extension candidates. Maximal degree in co-relation 12899. Up to 1197 conditions per place. [2024-06-27 19:37:56,637 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 79 selfloop transitions, 60 changer transitions 12/158 dead transitions. [2024-06-27 19:37:56,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 158 transitions, 1446 flow [2024-06-27 19:37:56,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:37:56,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:37:56,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-27 19:37:56,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-27 19:37:56,638 INFO L175 Difference]: Start difference. First operand has 160 places, 114 transitions, 878 flow. Second operand 11 states and 242 transitions. [2024-06-27 19:37:56,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 158 transitions, 1446 flow [2024-06-27 19:37:56,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 158 transitions, 1346 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 19:37:56,822 INFO L231 Difference]: Finished difference. Result has 161 places, 112 transitions, 902 flow [2024-06-27 19:37:56,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=902, PETRI_PLACES=161, PETRI_TRANSITIONS=112} [2024-06-27 19:37:56,822 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 121 predicate places. [2024-06-27 19:37:56,822 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 112 transitions, 902 flow [2024-06-27 19:37:56,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:56,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:56,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:56,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-27 19:37:56,822 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)] === [2024-06-27 19:37:56,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:56,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1748384415, now seen corresponding path program 21 times [2024-06-27 19:37:56,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:56,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021145645] [2024-06-27 19:37:56,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:56,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:56,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:56,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021145645] [2024-06-27 19:37:56,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021145645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:56,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:56,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:56,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45249260] [2024-06-27 19:37:56,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:56,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:56,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:56,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:56,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:56,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:56,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 112 transitions, 902 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:56,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:56,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:56,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:57,181 INFO L124 PetriNetUnfolderBase]: 1202/2086 cut-off events. [2024-06-27 19:37:57,182 INFO L125 PetriNetUnfolderBase]: For 130733/130733 co-relation queries the response was YES. [2024-06-27 19:37:57,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11452 conditions, 2086 events. 1202/2086 cut-off events. For 130733/130733 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 12301 event pairs, 293 based on Foata normal form. 18/2101 useless extension candidates. Maximal degree in co-relation 11382. Up to 1197 conditions per place. [2024-06-27 19:37:57,194 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 63 selfloop transitions, 56 changer transitions 19/145 dead transitions. [2024-06-27 19:37:57,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 145 transitions, 1294 flow [2024-06-27 19:37:57,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:57,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:57,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-27 19:37:57,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5726495726495726 [2024-06-27 19:37:57,195 INFO L175 Difference]: Start difference. First operand has 161 places, 112 transitions, 902 flow. Second operand 9 states and 201 transitions. [2024-06-27 19:37:57,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 145 transitions, 1294 flow [2024-06-27 19:37:57,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 145 transitions, 1171 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 19:37:57,332 INFO L231 Difference]: Finished difference. Result has 158 places, 108 transitions, 863 flow [2024-06-27 19:37:57,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=863, PETRI_PLACES=158, PETRI_TRANSITIONS=108} [2024-06-27 19:37:57,332 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 118 predicate places. [2024-06-27 19:37:57,332 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 108 transitions, 863 flow [2024-06-27 19:37:57,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:57,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:57,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:57,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-27 19:37:57,333 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)] === [2024-06-27 19:37:57,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:57,333 INFO L85 PathProgramCache]: Analyzing trace with hash 2114951077, now seen corresponding path program 22 times [2024-06-27 19:37:57,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:57,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030649529] [2024-06-27 19:37:57,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:57,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:57,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:57,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030649529] [2024-06-27 19:37:57,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030649529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:57,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:57,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:57,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800260704] [2024-06-27 19:37:57,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:57,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:57,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:57,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:57,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:57,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:57,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 108 transitions, 863 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:57,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:57,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:57,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:57,686 INFO L124 PetriNetUnfolderBase]: 1242/2162 cut-off events. [2024-06-27 19:37:57,686 INFO L125 PetriNetUnfolderBase]: For 145866/145866 co-relation queries the response was YES. [2024-06-27 19:37:57,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12337 conditions, 2162 events. 1242/2162 cut-off events. For 145866/145866 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 13032 event pairs, 321 based on Foata normal form. 18/2177 useless extension candidates. Maximal degree in co-relation 12268. Up to 1137 conditions per place. [2024-06-27 19:37:57,699 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 76 selfloop transitions, 51 changer transitions 8/142 dead transitions. [2024-06-27 19:37:57,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 142 transitions, 1353 flow [2024-06-27 19:37:57,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:57,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:57,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-27 19:37:57,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5754985754985755 [2024-06-27 19:37:57,700 INFO L175 Difference]: Start difference. First operand has 158 places, 108 transitions, 863 flow. Second operand 9 states and 202 transitions. [2024-06-27 19:37:57,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 142 transitions, 1353 flow [2024-06-27 19:37:57,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 142 transitions, 1227 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 19:37:57,879 INFO L231 Difference]: Finished difference. Result has 151 places, 106 transitions, 835 flow [2024-06-27 19:37:57,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=743, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=835, PETRI_PLACES=151, PETRI_TRANSITIONS=106} [2024-06-27 19:37:57,879 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 111 predicate places. [2024-06-27 19:37:57,879 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 106 transitions, 835 flow [2024-06-27 19:37:57,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:57,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:57,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:57,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-27 19:37:57,880 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)] === [2024-06-27 19:37:57,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:57,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1846913099, now seen corresponding path program 23 times [2024-06-27 19:37:57,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:57,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710925795] [2024-06-27 19:37:57,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:57,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:57,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:57,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710925795] [2024-06-27 19:37:57,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710925795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:57,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:57,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:57,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049611575] [2024-06-27 19:37:57,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:57,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:57,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:57,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:57,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:57,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:57,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 106 transitions, 835 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:57,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:57,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:57,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:58,243 INFO L124 PetriNetUnfolderBase]: 1218/2122 cut-off events. [2024-06-27 19:37:58,243 INFO L125 PetriNetUnfolderBase]: For 134140/134140 co-relation queries the response was YES. [2024-06-27 19:37:58,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11942 conditions, 2122 events. 1218/2122 cut-off events. For 134140/134140 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 12749 event pairs, 321 based on Foata normal form. 18/2137 useless extension candidates. Maximal degree in co-relation 11876. Up to 1137 conditions per place. [2024-06-27 19:37:58,256 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 75 selfloop transitions, 49 changer transitions 13/144 dead transitions. [2024-06-27 19:37:58,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 144 transitions, 1341 flow [2024-06-27 19:37:58,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:37:58,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:37:58,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-27 19:37:58,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-27 19:37:58,257 INFO L175 Difference]: Start difference. First operand has 151 places, 106 transitions, 835 flow. Second operand 10 states and 220 transitions. [2024-06-27 19:37:58,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 144 transitions, 1341 flow [2024-06-27 19:37:58,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 144 transitions, 1233 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:58,424 INFO L231 Difference]: Finished difference. Result has 151 places, 103 transitions, 813 flow [2024-06-27 19:37:58,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=813, PETRI_PLACES=151, PETRI_TRANSITIONS=103} [2024-06-27 19:37:58,424 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 111 predicate places. [2024-06-27 19:37:58,425 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 103 transitions, 813 flow [2024-06-27 19:37:58,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:58,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:58,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:58,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-27 19:37:58,425 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)] === [2024-06-27 19:37:58,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:58,425 INFO L85 PathProgramCache]: Analyzing trace with hash -460789055, now seen corresponding path program 24 times [2024-06-27 19:37:58,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:58,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018265703] [2024-06-27 19:37:58,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:58,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:58,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:58,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:58,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018265703] [2024-06-27 19:37:58,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018265703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:58,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:58,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:58,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042927461] [2024-06-27 19:37:58,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:58,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:58,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:58,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:58,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:58,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:58,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 103 transitions, 813 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:58,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:58,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:58,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:58,802 INFO L124 PetriNetUnfolderBase]: 1109/1916 cut-off events. [2024-06-27 19:37:58,803 INFO L125 PetriNetUnfolderBase]: For 110808/110808 co-relation queries the response was YES. [2024-06-27 19:37:58,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10478 conditions, 1916 events. 1109/1916 cut-off events. For 110808/110808 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 11110 event pairs, 327 based on Foata normal form. 18/1934 useless extension candidates. Maximal degree in co-relation 10413. Up to 1496 conditions per place. [2024-06-27 19:37:58,814 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 85 selfloop transitions, 16 changer transitions 24/132 dead transitions. [2024-06-27 19:37:58,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 132 transitions, 1167 flow [2024-06-27 19:37:58,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:58,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:58,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 19:37:58,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-27 19:37:58,815 INFO L175 Difference]: Start difference. First operand has 151 places, 103 transitions, 813 flow. Second operand 9 states and 189 transitions. [2024-06-27 19:37:58,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 132 transitions, 1167 flow [2024-06-27 19:37:58,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 132 transitions, 1064 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 19:37:58,942 INFO L231 Difference]: Finished difference. Result has 147 places, 98 transitions, 701 flow [2024-06-27 19:37:58,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=701, PETRI_PLACES=147, PETRI_TRANSITIONS=98} [2024-06-27 19:37:58,942 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 107 predicate places. [2024-06-27 19:37:58,942 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 98 transitions, 701 flow [2024-06-27 19:37:58,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:58,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:58,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:58,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-27 19:37:58,943 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)] === [2024-06-27 19:37:58,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:58,943 INFO L85 PathProgramCache]: Analyzing trace with hash 2029382387, now seen corresponding path program 25 times [2024-06-27 19:37:58,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:58,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607053950] [2024-06-27 19:37:58,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:58,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:58,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:59,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:59,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607053950] [2024-06-27 19:37:59,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607053950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:59,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:59,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:59,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673725036] [2024-06-27 19:37:59,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:59,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:59,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:59,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:59,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:59,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:59,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 98 transitions, 701 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:59,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:59,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:59,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:59,327 INFO L124 PetriNetUnfolderBase]: 1281/2212 cut-off events. [2024-06-27 19:37:59,327 INFO L125 PetriNetUnfolderBase]: For 145818/145818 co-relation queries the response was YES. [2024-06-27 19:37:59,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12731 conditions, 2212 events. 1281/2212 cut-off events. For 145818/145818 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 13497 event pairs, 607 based on Foata normal form. 24/2236 useless extension candidates. Maximal degree in co-relation 12668. Up to 1385 conditions per place. [2024-06-27 19:37:59,337 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 87 selfloop transitions, 16 changer transitions 16/126 dead transitions. [2024-06-27 19:37:59,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 126 transitions, 1131 flow [2024-06-27 19:37:59,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:37:59,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:37:59,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-27 19:37:59,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-27 19:37:59,338 INFO L175 Difference]: Start difference. First operand has 147 places, 98 transitions, 701 flow. Second operand 10 states and 208 transitions. [2024-06-27 19:37:59,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 126 transitions, 1131 flow [2024-06-27 19:37:59,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 126 transitions, 1066 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 19:37:59,443 INFO L231 Difference]: Finished difference. Result has 138 places, 94 transitions, 642 flow [2024-06-27 19:37:59,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=642, PETRI_PLACES=138, PETRI_TRANSITIONS=94} [2024-06-27 19:37:59,444 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 98 predicate places. [2024-06-27 19:37:59,444 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 94 transitions, 642 flow [2024-06-27 19:37:59,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:59,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:59,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:59,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-27 19:37:59,444 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)] === [2024-06-27 19:37:59,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:59,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1411134689, now seen corresponding path program 26 times [2024-06-27 19:37:59,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:59,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795622641] [2024-06-27 19:37:59,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:59,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:59,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:59,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795622641] [2024-06-27 19:37:59,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795622641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:59,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:59,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:59,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108010768] [2024-06-27 19:37:59,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:59,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:59,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:59,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:59,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:59,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:59,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 94 transitions, 642 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:59,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:59,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:59,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:59,768 INFO L124 PetriNetUnfolderBase]: 1102/1897 cut-off events. [2024-06-27 19:37:59,768 INFO L125 PetriNetUnfolderBase]: For 112958/112958 co-relation queries the response was YES. [2024-06-27 19:37:59,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10410 conditions, 1897 events. 1102/1897 cut-off events. For 112958/112958 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 11128 event pairs, 562 based on Foata normal form. 26/1923 useless extension candidates. Maximal degree in co-relation 10350. Up to 1619 conditions per place. [2024-06-27 19:37:59,778 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 78 selfloop transitions, 13 changer transitions 12/110 dead transitions. [2024-06-27 19:37:59,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 110 transitions, 900 flow [2024-06-27 19:37:59,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:59,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:59,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 19:37:59,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50997150997151 [2024-06-27 19:37:59,779 INFO L175 Difference]: Start difference. First operand has 138 places, 94 transitions, 642 flow. Second operand 9 states and 179 transitions. [2024-06-27 19:37:59,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 110 transitions, 900 flow [2024-06-27 19:37:59,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 110 transitions, 860 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 19:37:59,849 INFO L231 Difference]: Finished difference. Result has 134 places, 90 transitions, 607 flow [2024-06-27 19:37:59,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=607, PETRI_PLACES=134, PETRI_TRANSITIONS=90} [2024-06-27 19:37:59,850 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 94 predicate places. [2024-06-27 19:37:59,850 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 90 transitions, 607 flow [2024-06-27 19:37:59,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:59,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:59,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:59,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-27 19:37:59,850 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)] === [2024-06-27 19:37:59,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:59,850 INFO L85 PathProgramCache]: Analyzing trace with hash -2142001983, now seen corresponding path program 27 times [2024-06-27 19:37:59,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:59,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707343495] [2024-06-27 19:37:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:59,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:59,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:59,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707343495] [2024-06-27 19:37:59,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707343495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:59,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:59,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:59,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266032965] [2024-06-27 19:37:59,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:59,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:59,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:59,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:59,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:59,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:37:59,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 90 transitions, 607 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:59,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:59,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:37:59,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:00,184 INFO L124 PetriNetUnfolderBase]: 1168/2035 cut-off events. [2024-06-27 19:38:00,184 INFO L125 PetriNetUnfolderBase]: For 119389/119389 co-relation queries the response was YES. [2024-06-27 19:38:00,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11319 conditions, 2035 events. 1168/2035 cut-off events. For 119389/119389 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 12241 event pairs, 603 based on Foata normal form. 24/2059 useless extension candidates. Maximal degree in co-relation 11260. Up to 1462 conditions per place. [2024-06-27 19:38:00,195 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 71 selfloop transitions, 27 changer transitions 10/115 dead transitions. [2024-06-27 19:38:00,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 115 transitions, 989 flow [2024-06-27 19:38:00,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:38:00,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:38:00,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-27 19:38:00,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5244755244755245 [2024-06-27 19:38:00,196 INFO L175 Difference]: Start difference. First operand has 134 places, 90 transitions, 607 flow. Second operand 11 states and 225 transitions. [2024-06-27 19:38:00,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 115 transitions, 989 flow [2024-06-27 19:38:00,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 115 transitions, 955 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 19:38:00,286 INFO L231 Difference]: Finished difference. Result has 134 places, 87 transitions, 613 flow [2024-06-27 19:38:00,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=613, PETRI_PLACES=134, PETRI_TRANSITIONS=87} [2024-06-27 19:38:00,286 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 94 predicate places. [2024-06-27 19:38:00,286 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 87 transitions, 613 flow [2024-06-27 19:38:00,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:00,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:00,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:00,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-27 19:38:00,287 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)] === [2024-06-27 19:38:00,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:00,287 INFO L85 PathProgramCache]: Analyzing trace with hash -2142181473, now seen corresponding path program 28 times [2024-06-27 19:38:00,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:00,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146770594] [2024-06-27 19:38:00,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:00,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:00,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:00,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146770594] [2024-06-27 19:38:00,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146770594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:00,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:00,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:38:00,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400651174] [2024-06-27 19:38:00,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:00,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:38:00,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:00,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:38:00,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:38:00,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:38:00,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 87 transitions, 613 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:00,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:00,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:38:00,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:00,626 INFO L124 PetriNetUnfolderBase]: 1144/1987 cut-off events. [2024-06-27 19:38:00,626 INFO L125 PetriNetUnfolderBase]: For 115003/115003 co-relation queries the response was YES. [2024-06-27 19:38:00,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11074 conditions, 1987 events. 1144/1987 cut-off events. For 115003/115003 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 11871 event pairs, 635 based on Foata normal form. 26/2013 useless extension candidates. Maximal degree in co-relation 11016. Up to 1673 conditions per place. [2024-06-27 19:38:00,636 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 62 selfloop transitions, 22 changer transitions 14/105 dead transitions. [2024-06-27 19:38:00,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 105 transitions, 865 flow [2024-06-27 19:38:00,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:38:00,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:38:00,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-27 19:38:00,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5081585081585082 [2024-06-27 19:38:00,637 INFO L175 Difference]: Start difference. First operand has 134 places, 87 transitions, 613 flow. Second operand 11 states and 218 transitions. [2024-06-27 19:38:00,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 105 transitions, 865 flow [2024-06-27 19:38:00,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 105 transitions, 813 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 19:38:00,743 INFO L231 Difference]: Finished difference. Result has 133 places, 82 transitions, 578 flow [2024-06-27 19:38:00,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=578, PETRI_PLACES=133, PETRI_TRANSITIONS=82} [2024-06-27 19:38:00,744 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 93 predicate places. [2024-06-27 19:38:00,744 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 82 transitions, 578 flow [2024-06-27 19:38:00,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:00,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:00,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:00,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-27 19:38:00,745 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)] === [2024-06-27 19:38:00,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:00,745 INFO L85 PathProgramCache]: Analyzing trace with hash -736994643, now seen corresponding path program 29 times [2024-06-27 19:38:00,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:00,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116449496] [2024-06-27 19:38:00,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:00,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:00,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:00,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116449496] [2024-06-27 19:38:00,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116449496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:00,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:00,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:38:00,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624684803] [2024-06-27 19:38:00,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:00,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:38:00,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:00,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:38:00,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:38:00,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:38:00,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 82 transitions, 578 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:00,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:00,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:38:00,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:01,065 INFO L124 PetriNetUnfolderBase]: 1189/2090 cut-off events. [2024-06-27 19:38:01,065 INFO L125 PetriNetUnfolderBase]: For 115773/115773 co-relation queries the response was YES. [2024-06-27 19:38:01,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11803 conditions, 2090 events. 1189/2090 cut-off events. For 115773/115773 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 12829 event pairs, 533 based on Foata normal form. 18/2108 useless extension candidates. Maximal degree in co-relation 11746. Up to 916 conditions per place. [2024-06-27 19:38:01,076 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 74 selfloop transitions, 23 changer transitions 8/112 dead transitions. [2024-06-27 19:38:01,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 112 transitions, 1046 flow [2024-06-27 19:38:01,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:38:01,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:38:01,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-27 19:38:01,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435897435897435 [2024-06-27 19:38:01,077 INFO L175 Difference]: Start difference. First operand has 133 places, 82 transitions, 578 flow. Second operand 10 states and 212 transitions. [2024-06-27 19:38:01,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 112 transitions, 1046 flow [2024-06-27 19:38:01,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 112 transitions, 984 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-27 19:38:01,157 INFO L231 Difference]: Finished difference. Result has 128 places, 80 transitions, 565 flow [2024-06-27 19:38:01,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=565, PETRI_PLACES=128, PETRI_TRANSITIONS=80} [2024-06-27 19:38:01,157 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 88 predicate places. [2024-06-27 19:38:01,157 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 80 transitions, 565 flow [2024-06-27 19:38:01,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:01,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:01,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:01,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-27 19:38:01,158 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)] === [2024-06-27 19:38:01,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:01,158 INFO L85 PathProgramCache]: Analyzing trace with hash -736984413, now seen corresponding path program 30 times [2024-06-27 19:38:01,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:01,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665961612] [2024-06-27 19:38:01,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:01,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:01,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:01,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:01,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665961612] [2024-06-27 19:38:01,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665961612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:01,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:01,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:38:01,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542020182] [2024-06-27 19:38:01,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:01,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:38:01,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:01,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:38:01,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:38:01,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:38:01,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 80 transitions, 565 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:01,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:01,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:38:01,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:01,483 INFO L124 PetriNetUnfolderBase]: 1084/1903 cut-off events. [2024-06-27 19:38:01,484 INFO L125 PetriNetUnfolderBase]: For 92662/92662 co-relation queries the response was YES. [2024-06-27 19:38:01,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10395 conditions, 1903 events. 1084/1903 cut-off events. For 92662/92662 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11413 event pairs, 515 based on Foata normal form. 18/1921 useless extension candidates. Maximal degree in co-relation 10340. Up to 916 conditions per place. [2024-06-27 19:38:01,493 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 73 selfloop transitions, 21 changer transitions 9/110 dead transitions. [2024-06-27 19:38:01,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 110 transitions, 1021 flow [2024-06-27 19:38:01,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:38:01,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:38:01,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-27 19:38:01,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435897435897435 [2024-06-27 19:38:01,494 INFO L175 Difference]: Start difference. First operand has 128 places, 80 transitions, 565 flow. Second operand 10 states and 212 transitions. [2024-06-27 19:38:01,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 110 transitions, 1021 flow [2024-06-27 19:38:01,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 110 transitions, 965 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 19:38:01,577 INFO L231 Difference]: Finished difference. Result has 127 places, 77 transitions, 541 flow [2024-06-27 19:38:01,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=541, PETRI_PLACES=127, PETRI_TRANSITIONS=77} [2024-06-27 19:38:01,578 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 87 predicate places. [2024-06-27 19:38:01,578 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 77 transitions, 541 flow [2024-06-27 19:38:01,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:01,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:01,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:01,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-27 19:38:01,578 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)] === [2024-06-27 19:38:01,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:01,578 INFO L85 PathProgramCache]: Analyzing trace with hash 891847361, now seen corresponding path program 31 times [2024-06-27 19:38:01,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:01,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649046934] [2024-06-27 19:38:01,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:01,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:01,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:01,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649046934] [2024-06-27 19:38:01,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649046934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:01,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:01,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:38:01,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648857921] [2024-06-27 19:38:01,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:01,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:38:01,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:01,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:38:01,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:38:01,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:38:01,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 77 transitions, 541 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:01,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:01,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:38:01,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:01,907 INFO L124 PetriNetUnfolderBase]: 1058/1853 cut-off events. [2024-06-27 19:38:01,907 INFO L125 PetriNetUnfolderBase]: For 87701/87701 co-relation queries the response was YES. [2024-06-27 19:38:01,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10108 conditions, 1853 events. 1058/1853 cut-off events. For 87701/87701 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 10976 event pairs, 524 based on Foata normal form. 18/1871 useless extension candidates. Maximal degree in co-relation 10054. Up to 1545 conditions per place. [2024-06-27 19:38:01,917 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 64 selfloop transitions, 11 changer transitions 17/99 dead transitions. [2024-06-27 19:38:01,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 99 transitions, 799 flow [2024-06-27 19:38:01,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:38:01,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:38:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 19:38:01,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-27 19:38:01,917 INFO L175 Difference]: Start difference. First operand has 127 places, 77 transitions, 541 flow. Second operand 9 states and 182 transitions. [2024-06-27 19:38:01,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 99 transitions, 799 flow [2024-06-27 19:38:02,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 99 transitions, 752 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 19:38:02,005 INFO L231 Difference]: Finished difference. Result has 123 places, 74 transitions, 500 flow [2024-06-27 19:38:02,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=500, PETRI_PLACES=123, PETRI_TRANSITIONS=74} [2024-06-27 19:38:02,005 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 83 predicate places. [2024-06-27 19:38:02,005 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 74 transitions, 500 flow [2024-06-27 19:38:02,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:02,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:02,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:02,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-27 19:38:02,006 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)] === [2024-06-27 19:38:02,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:02,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1950593055, now seen corresponding path program 32 times [2024-06-27 19:38:02,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:02,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678671553] [2024-06-27 19:38:02,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:02,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:02,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:02,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678671553] [2024-06-27 19:38:02,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678671553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:02,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:02,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:38:02,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654198746] [2024-06-27 19:38:02,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:02,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:38:02,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:02,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:38:02,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:38:02,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:38:02,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 74 transitions, 500 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:02,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:02,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:38:02,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:02,281 INFO L124 PetriNetUnfolderBase]: 915/1606 cut-off events. [2024-06-27 19:38:02,281 INFO L125 PetriNetUnfolderBase]: For 68420/68420 co-relation queries the response was YES. [2024-06-27 19:38:02,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8274 conditions, 1606 events. 915/1606 cut-off events. For 68420/68420 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9242 event pairs, 526 based on Foata normal form. 26/1632 useless extension candidates. Maximal degree in co-relation 8222. Up to 1316 conditions per place. [2024-06-27 19:38:02,289 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 54 selfloop transitions, 17 changer transitions 12/90 dead transitions. [2024-06-27 19:38:02,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 90 transitions, 718 flow [2024-06-27 19:38:02,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:38:02,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:38:02,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-27 19:38:02,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213675213675214 [2024-06-27 19:38:02,290 INFO L175 Difference]: Start difference. First operand has 123 places, 74 transitions, 500 flow. Second operand 9 states and 183 transitions. [2024-06-27 19:38:02,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 90 transitions, 718 flow [2024-06-27 19:38:02,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 90 transitions, 692 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:38:02,329 INFO L231 Difference]: Finished difference. Result has 120 places, 70 transitions, 486 flow [2024-06-27 19:38:02,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=486, PETRI_PLACES=120, PETRI_TRANSITIONS=70} [2024-06-27 19:38:02,330 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 80 predicate places. [2024-06-27 19:38:02,330 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 70 transitions, 486 flow [2024-06-27 19:38:02,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:02,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:02,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:02,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-27 19:38:02,330 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)] === [2024-06-27 19:38:02,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:02,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1950740925, now seen corresponding path program 33 times [2024-06-27 19:38:02,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:02,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177216302] [2024-06-27 19:38:02,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:02,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:02,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:02,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177216302] [2024-06-27 19:38:02,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177216302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:02,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:02,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:38:02,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972839577] [2024-06-27 19:38:02,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:02,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:38:02,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:02,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:38:02,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:38:02,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:38:02,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 70 transitions, 486 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:02,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:02,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:38:02,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:02,604 INFO L124 PetriNetUnfolderBase]: 786/1409 cut-off events. [2024-06-27 19:38:02,604 INFO L125 PetriNetUnfolderBase]: For 51006/51006 co-relation queries the response was YES. [2024-06-27 19:38:02,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6803 conditions, 1409 events. 786/1409 cut-off events. For 51006/51006 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 7939 event pairs, 402 based on Foata normal form. 24/1433 useless extension candidates. Maximal degree in co-relation 6752. Up to 1082 conditions per place. [2024-06-27 19:38:02,610 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 52 selfloop transitions, 13 changer transitions 18/90 dead transitions. [2024-06-27 19:38:02,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 90 transitions, 722 flow [2024-06-27 19:38:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:38:02,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:38:02,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-27 19:38:02,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5242165242165242 [2024-06-27 19:38:02,611 INFO L175 Difference]: Start difference. First operand has 120 places, 70 transitions, 486 flow. Second operand 9 states and 184 transitions. [2024-06-27 19:38:02,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 90 transitions, 722 flow [2024-06-27 19:38:02,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 90 transitions, 684 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:38:02,653 INFO L231 Difference]: Finished difference. Result has 117 places, 65 transitions, 443 flow [2024-06-27 19:38:02,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=443, PETRI_PLACES=117, PETRI_TRANSITIONS=65} [2024-06-27 19:38:02,653 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 77 predicate places. [2024-06-27 19:38:02,653 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 65 transitions, 443 flow [2024-06-27 19:38:02,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:02,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:02,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:02,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-27 19:38:02,653 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)] === [2024-06-27 19:38:02,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:02,653 INFO L85 PathProgramCache]: Analyzing trace with hash -563055003, now seen corresponding path program 34 times [2024-06-27 19:38:02,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:02,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283073329] [2024-06-27 19:38:02,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:02,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:02,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:02,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283073329] [2024-06-27 19:38:02,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283073329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:02,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:02,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:38:02,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785870121] [2024-06-27 19:38:02,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:02,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:38:02,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:02,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:38:02,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:38:02,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:38:02,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 65 transitions, 443 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:02,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:02,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:38:02,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:02,921 INFO L124 PetriNetUnfolderBase]: 813/1458 cut-off events. [2024-06-27 19:38:02,921 INFO L125 PetriNetUnfolderBase]: For 53549/53549 co-relation queries the response was YES. [2024-06-27 19:38:02,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7318 conditions, 1458 events. 813/1458 cut-off events. For 53549/53549 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8429 event pairs, 396 based on Foata normal form. 18/1476 useless extension candidates. Maximal degree in co-relation 7268. Up to 762 conditions per place. [2024-06-27 19:38:02,929 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 67 selfloop transitions, 14 changer transitions 8/96 dead transitions. [2024-06-27 19:38:02,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 96 transitions, 851 flow [2024-06-27 19:38:02,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:38:02,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:38:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-27 19:38:02,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-27 19:38:02,929 INFO L175 Difference]: Start difference. First operand has 117 places, 65 transitions, 443 flow. Second operand 9 states and 195 transitions. [2024-06-27 19:38:02,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 96 transitions, 851 flow [2024-06-27 19:38:02,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 96 transitions, 801 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-27 19:38:02,967 INFO L231 Difference]: Finished difference. Result has 110 places, 63 transitions, 428 flow [2024-06-27 19:38:02,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=428, PETRI_PLACES=110, PETRI_TRANSITIONS=63} [2024-06-27 19:38:02,968 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 70 predicate places. [2024-06-27 19:38:02,968 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 63 transitions, 428 flow [2024-06-27 19:38:02,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:02,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:02,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:02,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-27 19:38:02,968 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)] === [2024-06-27 19:38:02,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:02,968 INFO L85 PathProgramCache]: Analyzing trace with hash -279074685, now seen corresponding path program 35 times [2024-06-27 19:38:02,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:02,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448314667] [2024-06-27 19:38:02,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:02,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:03,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:03,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448314667] [2024-06-27 19:38:03,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448314667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:03,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:03,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:38:03,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484667555] [2024-06-27 19:38:03,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:03,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:38:03,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:03,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:38:03,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:38:03,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:38:03,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 63 transitions, 428 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:03,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:03,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:38:03,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:03,228 INFO L124 PetriNetUnfolderBase]: 708/1275 cut-off events. [2024-06-27 19:38:03,228 INFO L125 PetriNetUnfolderBase]: For 36894/36894 co-relation queries the response was YES. [2024-06-27 19:38:03,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6033 conditions, 1275 events. 708/1275 cut-off events. For 36894/36894 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 7057 event pairs, 384 based on Foata normal form. 18/1293 useless extension candidates. Maximal degree in co-relation 5986. Up to 762 conditions per place. [2024-06-27 19:38:03,233 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 55 selfloop transitions, 11 changer transitions 16/89 dead transitions. [2024-06-27 19:38:03,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 89 transitions, 734 flow [2024-06-27 19:38:03,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:38:03,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:38:03,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 19:38:03,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-27 19:38:03,234 INFO L175 Difference]: Start difference. First operand has 110 places, 63 transitions, 428 flow. Second operand 9 states and 189 transitions. [2024-06-27 19:38:03,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 89 transitions, 734 flow [2024-06-27 19:38:03,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 89 transitions, 699 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 19:38:03,269 INFO L231 Difference]: Finished difference. Result has 109 places, 59 transitions, 395 flow [2024-06-27 19:38:03,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=395, PETRI_PLACES=109, PETRI_TRANSITIONS=59} [2024-06-27 19:38:03,269 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 69 predicate places. [2024-06-27 19:38:03,269 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 59 transitions, 395 flow [2024-06-27 19:38:03,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:03,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:03,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:03,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-27 19:38:03,270 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)] === [2024-06-27 19:38:03,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:03,270 INFO L85 PathProgramCache]: Analyzing trace with hash -726144333, now seen corresponding path program 36 times [2024-06-27 19:38:03,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:03,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742145053] [2024-06-27 19:38:03,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:03,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:03,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:03,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742145053] [2024-06-27 19:38:03,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742145053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:03,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:03,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:38:03,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591012054] [2024-06-27 19:38:03,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:03,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:38:03,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:03,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:38:03,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:38:03,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:38:03,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 59 transitions, 395 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:03,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:03,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:38:03,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:03,545 INFO L124 PetriNetUnfolderBase]: 584/1061 cut-off events. [2024-06-27 19:38:03,546 INFO L125 PetriNetUnfolderBase]: For 27965/27965 co-relation queries the response was YES. [2024-06-27 19:38:03,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4706 conditions, 1061 events. 584/1061 cut-off events. For 27965/27965 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5664 event pairs, 294 based on Foata normal form. 24/1085 useless extension candidates. Maximal degree in co-relation 4660. Up to 774 conditions per place. [2024-06-27 19:38:03,550 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 42 selfloop transitions, 5 changer transitions 25/79 dead transitions. [2024-06-27 19:38:03,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 79 transitions, 613 flow [2024-06-27 19:38:03,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:38:03,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:38:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 19:38:03,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071225071225072 [2024-06-27 19:38:03,551 INFO L175 Difference]: Start difference. First operand has 109 places, 59 transitions, 395 flow. Second operand 9 states and 178 transitions. [2024-06-27 19:38:03,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 79 transitions, 613 flow [2024-06-27 19:38:03,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 79 transitions, 585 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 19:38:03,572 INFO L231 Difference]: Finished difference. Result has 103 places, 52 transitions, 326 flow [2024-06-27 19:38:03,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=326, PETRI_PLACES=103, PETRI_TRANSITIONS=52} [2024-06-27 19:38:03,572 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 63 predicate places. [2024-06-27 19:38:03,572 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 52 transitions, 326 flow [2024-06-27 19:38:03,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:03,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:03,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:03,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-27 19:38:03,573 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)] === [2024-06-27 19:38:03,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:03,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1690868251, now seen corresponding path program 37 times [2024-06-27 19:38:03,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:03,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542198538] [2024-06-27 19:38:03,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:03,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:03,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:03,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:03,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542198538] [2024-06-27 19:38:03,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542198538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:03,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:03,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:03,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398734147] [2024-06-27 19:38:03,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:03,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:03,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:03,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:03,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:03,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:38:03,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 52 transitions, 326 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:03,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:03,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:38:03,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:03,797 INFO L124 PetriNetUnfolderBase]: 525/952 cut-off events. [2024-06-27 19:38:03,798 INFO L125 PetriNetUnfolderBase]: For 20424/20424 co-relation queries the response was YES. [2024-06-27 19:38:03,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4126 conditions, 952 events. 525/952 cut-off events. For 20424/20424 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4964 event pairs, 221 based on Foata normal form. 18/966 useless extension candidates. Maximal degree in co-relation 4083. Up to 290 conditions per place. [2024-06-27 19:38:03,801 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 47 selfloop transitions, 12 changer transitions 9/75 dead transitions. [2024-06-27 19:38:03,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 75 transitions, 632 flow [2024-06-27 19:38:03,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:38:03,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:38:03,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 19:38:03,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-27 19:38:03,802 INFO L175 Difference]: Start difference. First operand has 103 places, 52 transitions, 326 flow. Second operand 9 states and 182 transitions. [2024-06-27 19:38:03,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 75 transitions, 632 flow [2024-06-27 19:38:03,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 75 transitions, 590 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 19:38:03,813 INFO L231 Difference]: Finished difference. Result has 90 places, 49 transitions, 309 flow [2024-06-27 19:38:03,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=309, PETRI_PLACES=90, PETRI_TRANSITIONS=49} [2024-06-27 19:38:03,813 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 50 predicate places. [2024-06-27 19:38:03,813 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 49 transitions, 309 flow [2024-06-27 19:38:03,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:03,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:03,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:03,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-27 19:38:03,813 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:03,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:03,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1523129997, now seen corresponding path program 13 times [2024-06-27 19:38:03,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:03,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490502288] [2024-06-27 19:38:03,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:03,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:03,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:03,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490502288] [2024-06-27 19:38:03,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490502288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:03,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:03,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:03,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563751152] [2024-06-27 19:38:03,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:03,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:03,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:03,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:03,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:03,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:38:03,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 49 transitions, 309 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:03,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:03,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:38:03,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:04,028 INFO L124 PetriNetUnfolderBase]: 497/906 cut-off events. [2024-06-27 19:38:04,028 INFO L125 PetriNetUnfolderBase]: For 15814/15814 co-relation queries the response was YES. [2024-06-27 19:38:04,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3857 conditions, 906 events. 497/906 cut-off events. For 15814/15814 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4714 event pairs, 215 based on Foata normal form. 18/920 useless extension candidates. Maximal degree in co-relation 3819. Up to 290 conditions per place. [2024-06-27 19:38:04,031 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 46 selfloop transitions, 11 changer transitions 8/72 dead transitions. [2024-06-27 19:38:04,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 72 transitions, 599 flow [2024-06-27 19:38:04,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:38:04,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:38:04,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 19:38:04,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-27 19:38:04,032 INFO L175 Difference]: Start difference. First operand has 90 places, 49 transitions, 309 flow. Second operand 9 states and 182 transitions. [2024-06-27 19:38:04,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 72 transitions, 599 flow [2024-06-27 19:38:04,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 72 transitions, 565 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 19:38:04,039 INFO L231 Difference]: Finished difference. Result has 89 places, 47 transitions, 295 flow [2024-06-27 19:38:04,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=295, PETRI_PLACES=89, PETRI_TRANSITIONS=47} [2024-06-27 19:38:04,039 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 49 predicate places. [2024-06-27 19:38:04,039 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 47 transitions, 295 flow [2024-06-27 19:38:04,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:04,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:04,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:04,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-27 19:38:04,039 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:04,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:04,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2050689861, now seen corresponding path program 14 times [2024-06-27 19:38:04,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:04,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261549582] [2024-06-27 19:38:04,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:04,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:04,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:04,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261549582] [2024-06-27 19:38:04,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261549582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:04,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:04,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:04,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077543542] [2024-06-27 19:38:04,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:04,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:04,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:04,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:04,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:04,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:38:04,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 47 transitions, 295 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:04,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:04,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:38:04,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:04,229 INFO L124 PetriNetUnfolderBase]: 392/721 cut-off events. [2024-06-27 19:38:04,230 INFO L125 PetriNetUnfolderBase]: For 10924/10924 co-relation queries the response was YES. [2024-06-27 19:38:04,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2942 conditions, 721 events. 392/721 cut-off events. For 10924/10924 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3491 event pairs, 158 based on Foata normal form. 18/737 useless extension candidates. Maximal degree in co-relation 2905. Up to 290 conditions per place. [2024-06-27 19:38:04,232 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 38 selfloop transitions, 10 changer transitions 11/66 dead transitions. [2024-06-27 19:38:04,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 66 transitions, 509 flow [2024-06-27 19:38:04,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:38:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:38:04,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 19:38:04,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5042735042735043 [2024-06-27 19:38:04,233 INFO L175 Difference]: Start difference. First operand has 89 places, 47 transitions, 295 flow. Second operand 9 states and 177 transitions. [2024-06-27 19:38:04,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 66 transitions, 509 flow [2024-06-27 19:38:04,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 66 transitions, 480 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 19:38:04,239 INFO L231 Difference]: Finished difference. Result has 88 places, 42 transitions, 253 flow [2024-06-27 19:38:04,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=253, PETRI_PLACES=88, PETRI_TRANSITIONS=42} [2024-06-27 19:38:04,239 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 48 predicate places. [2024-06-27 19:38:04,239 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 42 transitions, 253 flow [2024-06-27 19:38:04,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:04,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:04,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:04,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-27 19:38:04,239 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:04,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:04,239 INFO L85 PathProgramCache]: Analyzing trace with hash -165859079, now seen corresponding path program 38 times [2024-06-27 19:38:04,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:04,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184521320] [2024-06-27 19:38:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:04,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:04,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:04,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184521320] [2024-06-27 19:38:04,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184521320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:04,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:04,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:04,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453750525] [2024-06-27 19:38:04,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:04,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:04,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:04,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:04,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:04,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:38:04,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 42 transitions, 253 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:04,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:04,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:38:04,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:04,418 INFO L124 PetriNetUnfolderBase]: 284/527 cut-off events. [2024-06-27 19:38:04,418 INFO L125 PetriNetUnfolderBase]: For 6674/6674 co-relation queries the response was YES. [2024-06-27 19:38:04,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1981 conditions, 527 events. 284/527 cut-off events. For 6674/6674 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2304 event pairs, 110 based on Foata normal form. 18/543 useless extension candidates. Maximal degree in co-relation 1945. Up to 290 conditions per place. [2024-06-27 19:38:04,420 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 25 selfloop transitions, 3 changer transitions 23/58 dead transitions. [2024-06-27 19:38:04,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 58 transitions, 407 flow [2024-06-27 19:38:04,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:38:04,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:38:04,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 19:38:04,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843304843304843 [2024-06-27 19:38:04,421 INFO L175 Difference]: Start difference. First operand has 88 places, 42 transitions, 253 flow. Second operand 9 states and 170 transitions. [2024-06-27 19:38:04,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 58 transitions, 407 flow [2024-06-27 19:38:04,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 58 transitions, 381 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 19:38:04,425 INFO L231 Difference]: Finished difference. Result has 81 places, 33 transitions, 172 flow [2024-06-27 19:38:04,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=172, PETRI_PLACES=81, PETRI_TRANSITIONS=33} [2024-06-27 19:38:04,425 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 41 predicate places. [2024-06-27 19:38:04,426 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 33 transitions, 172 flow [2024-06-27 19:38:04,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:04,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:04,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:04,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-27 19:38:04,440 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:04,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:04,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1434011551, now seen corresponding path program 39 times [2024-06-27 19:38:04,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:04,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108854056] [2024-06-27 19:38:04,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:04,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:04,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:04,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:04,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108854056] [2024-06-27 19:38:04,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108854056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:04,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:04,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:04,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723945951] [2024-06-27 19:38:04,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:04,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:04,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:04,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:04,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:04,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:38:04,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 33 transitions, 172 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:04,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:04,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:38:04,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:04,637 INFO L124 PetriNetUnfolderBase]: 229/426 cut-off events. [2024-06-27 19:38:04,637 INFO L125 PetriNetUnfolderBase]: For 4668/4676 co-relation queries the response was YES. [2024-06-27 19:38:04,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1536 conditions, 426 events. 229/426 cut-off events. For 4668/4676 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1764 event pairs, 49 based on Foata normal form. 18/440 useless extension candidates. Maximal degree in co-relation 1503. Up to 216 conditions per place. [2024-06-27 19:38:04,638 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 23 selfloop transitions, 4 changer transitions 17/51 dead transitions. [2024-06-27 19:38:04,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 51 transitions, 324 flow [2024-06-27 19:38:04,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:04,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:04,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 19:38:04,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967948717948718 [2024-06-27 19:38:04,639 INFO L175 Difference]: Start difference. First operand has 81 places, 33 transitions, 172 flow. Second operand 8 states and 155 transitions. [2024-06-27 19:38:04,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 51 transitions, 324 flow [2024-06-27 19:38:04,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 51 transitions, 296 flow, removed 8 selfloop flow, removed 14 redundant places. [2024-06-27 19:38:04,641 INFO L231 Difference]: Finished difference. Result has 60 places, 30 transitions, 136 flow [2024-06-27 19:38:04,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=136, PETRI_PLACES=60, PETRI_TRANSITIONS=30} [2024-06-27 19:38:04,641 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 20 predicate places. [2024-06-27 19:38:04,641 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 30 transitions, 136 flow [2024-06-27 19:38:04,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:04,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:04,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:04,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-27 19:38:04,642 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:04,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:04,642 INFO L85 PathProgramCache]: Analyzing trace with hash 35219941, now seen corresponding path program 40 times [2024-06-27 19:38:04,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:04,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321608647] [2024-06-27 19:38:04,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:04,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:04,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:04,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321608647] [2024-06-27 19:38:04,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321608647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:04,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:04,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:04,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940099066] [2024-06-27 19:38:04,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:04,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:04,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:04,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:04,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:04,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:38:04,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 30 transitions, 136 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:04,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:04,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:38:04,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:04,803 INFO L124 PetriNetUnfolderBase]: 185/350 cut-off events. [2024-06-27 19:38:04,803 INFO L125 PetriNetUnfolderBase]: For 1623/1631 co-relation queries the response was YES. [2024-06-27 19:38:04,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1149 conditions, 350 events. 185/350 cut-off events. For 1623/1631 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1406 event pairs, 29 based on Foata normal form. 18/368 useless extension candidates. Maximal degree in co-relation 1125. Up to 171 conditions per place. [2024-06-27 19:38:04,804 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 24 selfloop transitions, 5 changer transitions 8/44 dead transitions. [2024-06-27 19:38:04,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 44 transitions, 258 flow [2024-06-27 19:38:04,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:04,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 19:38:04,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4775641025641026 [2024-06-27 19:38:04,806 INFO L175 Difference]: Start difference. First operand has 60 places, 30 transitions, 136 flow. Second operand 8 states and 149 transitions. [2024-06-27 19:38:04,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 44 transitions, 258 flow [2024-06-27 19:38:04,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 44 transitions, 238 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 19:38:04,807 INFO L231 Difference]: Finished difference. Result has 56 places, 28 transitions, 121 flow [2024-06-27 19:38:04,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=121, PETRI_PLACES=56, PETRI_TRANSITIONS=28} [2024-06-27 19:38:04,807 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 16 predicate places. [2024-06-27 19:38:04,808 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 28 transitions, 121 flow [2024-06-27 19:38:04,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:04,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:04,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:04,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-27 19:38:04,808 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:04,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:04,808 INFO L85 PathProgramCache]: Analyzing trace with hash 193322463, now seen corresponding path program 41 times [2024-06-27 19:38:04,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:04,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731113914] [2024-06-27 19:38:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:04,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:04,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:04,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731113914] [2024-06-27 19:38:04,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731113914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:04,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:04,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:04,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944492200] [2024-06-27 19:38:04,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:04,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:04,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:04,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:04,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:04,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 19:38:04,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 28 transitions, 121 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:04,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:04,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 19:38:04,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:04,979 INFO L124 PetriNetUnfolderBase]: 80/171 cut-off events. [2024-06-27 19:38:04,979 INFO L125 PetriNetUnfolderBase]: For 631/639 co-relation queries the response was YES. [2024-06-27 19:38:04,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495 conditions, 171 events. 80/171 cut-off events. For 631/639 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 520 event pairs, 1 based on Foata normal form. 18/189 useless extension candidates. Maximal degree in co-relation 481. Up to 96 conditions per place. [2024-06-27 19:38:04,979 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2024-06-27 19:38:04,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 37 transitions, 191 flow [2024-06-27 19:38:04,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:04,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 19:38:04,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 19:38:04,980 INFO L175 Difference]: Start difference. First operand has 56 places, 28 transitions, 121 flow. Second operand 8 states and 143 transitions. [2024-06-27 19:38:04,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 37 transitions, 191 flow [2024-06-27 19:38:04,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 37 transitions, 164 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-27 19:38:04,980 INFO L231 Difference]: Finished difference. Result has 49 places, 0 transitions, 0 flow [2024-06-27 19:38:04,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=49, PETRI_TRANSITIONS=0} [2024-06-27 19:38:04,981 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 9 predicate places. [2024-06-27 19:38:04,981 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 0 transitions, 0 flow [2024-06-27 19:38:04,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:04,983 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-27 19:38:04,984 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-27 19:38:04,993 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-27 19:38:04,993 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-27 19:38:04,993 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-27 19:38:04,993 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-27 19:38:04,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-27 19:38:04,994 INFO L445 BasicCegarLoop]: Path program histogram: [41, 29, 14, 12, 11, 11, 10, 9, 9, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:04,996 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 19:38:04,996 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 19:38:04,999 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-27 19:38:04,999 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-27 19:38:05,000 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 07:38:04 BasicIcfg [2024-06-27 19:38:05,000 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 19:38:05,000 INFO L158 Benchmark]: Toolchain (without parser) took 359907.74ms. Allocated memory was 159.4MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 97.5MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 731.0MB. Max. memory is 16.1GB. [2024-06-27 19:38:05,000 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 159.4MB. Free memory is still 121.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 19:38:05,000 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 159.4MB. Free memory is still 101.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 19:38:05,001 INFO L158 Benchmark]: CACSL2BoogieTranslator took 486.91ms. Allocated memory is still 159.4MB. Free memory was 97.5MB in the beginning and 70.4MB in the end (delta: 27.0MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-06-27 19:38:05,001 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.80ms. Allocated memory is still 159.4MB. Free memory was 70.4MB in the beginning and 68.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 19:38:05,001 INFO L158 Benchmark]: Boogie Preprocessor took 29.61ms. Allocated memory is still 159.4MB. Free memory was 68.4MB in the beginning and 66.0MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 19:38:05,001 INFO L158 Benchmark]: RCFGBuilder took 410.94ms. Allocated memory is still 159.4MB. Free memory was 66.0MB in the beginning and 106.0MB in the end (delta: -40.0MB). Peak memory consumption was 10.1MB. Max. memory is 16.1GB. [2024-06-27 19:38:05,001 INFO L158 Benchmark]: TraceAbstraction took 358909.92ms. Allocated memory was 159.4MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 105.3MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 735.5MB. Max. memory is 16.1GB. [2024-06-27 19:38:05,002 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 159.4MB. Free memory is still 121.2MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.15ms. Allocated memory is still 159.4MB. Free memory is still 101.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 486.91ms. Allocated memory is still 159.4MB. Free memory was 97.5MB in the beginning and 70.4MB in the end (delta: 27.0MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.80ms. Allocated memory is still 159.4MB. Free memory was 70.4MB in the beginning and 68.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.61ms. Allocated memory is still 159.4MB. Free memory was 68.4MB in the beginning and 66.0MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 410.94ms. Allocated memory is still 159.4MB. Free memory was 66.0MB in the beginning and 106.0MB in the end (delta: -40.0MB). Peak memory consumption was 10.1MB. Max. memory is 16.1GB. * TraceAbstraction took 358909.92ms. Allocated memory was 159.4MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 105.3MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 735.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 776]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 778]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 779]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 63 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 358.8s, OverallIterations: 206, TraceHistogramMax: 1, PathProgramHistogramMax: 41, EmptinessCheckTime: 0.0s, AutomataDifference: 343.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13814 SdHoareTripleChecker+Valid, 21.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11277 mSDsluCounter, 3825 SdHoareTripleChecker+Invalid, 17.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2577 mSDsCounter, 1977 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 53025 IncrementalHoareTripleChecker+Invalid, 55002 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1977 mSolverCounterUnsat, 1248 mSDtfsCounter, 53025 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1383 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 6.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3939occurred in iteration=136, InterpolantAutomatonStates: 1640, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 13.6s InterpolantComputationTime, 3892 NumberOfCodeBlocks, 3892 NumberOfCodeBlocksAsserted, 206 NumberOfCheckSat, 3686 ConstructedInterpolants, 0 QuantifiedInterpolants, 31455 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 206 InterpolantComputations, 206 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-27 19:38:05,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE