./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/mutex-meet-rel/safe026_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe026_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/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-eb4cb34-m [2024-06-21 18:13:26,201 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 18:13:26,254 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 18:13:26,262 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 18:13:26,263 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 18:13:26,290 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 18:13:26,290 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 18:13:26,291 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 18:13:26,291 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 18:13:26,294 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 18:13:26,294 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 18:13:26,295 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 18:13:26,295 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 18:13:26,296 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 18:13:26,297 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 18:13:26,297 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 18:13:26,297 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 18:13:26,297 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 18:13:26,297 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 18:13:26,298 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 18:13:26,299 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 18:13:26,299 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 18:13:26,299 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 18:13:26,299 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 18:13:26,300 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 18:13:26,300 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 18:13:26,300 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 18:13:26,300 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 18:13:26,301 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 18:13:26,301 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 18:13:26,302 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 18:13:26,302 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 18:13:26,302 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:13:26,302 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 18:13:26,302 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 18:13:26,303 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 18:13:26,303 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 18:13:26,303 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 18:13:26,303 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 18:13:26,303 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 18:13:26,303 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 18:13:26,304 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 18:13:26,304 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 18:13:26,304 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 18:13:26,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 18:13:26,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 18:13:26,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 18:13:26,527 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 18:13:26,528 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 18:13:26,529 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe026_tso.yml/witness.yml [2024-06-21 18:13:26,633 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 18:13:26,633 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 18:13:26,636 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe026_tso.i [2024-06-21 18:13:27,630 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 18:13:27,808 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 18:13:27,810 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe026_tso.i [2024-06-21 18:13:27,828 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f38f2a0fd/872380dec8944e1ba9c7f55b5f14c05e/FLAGa60b0326f [2024-06-21 18:13:27,837 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f38f2a0fd/872380dec8944e1ba9c7f55b5f14c05e [2024-06-21 18:13:27,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 18:13:27,839 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 18:13:27,839 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 18:13:27,839 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 18:13:27,843 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 18:13:27,844 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:13:26" (1/2) ... [2024-06-21 18:13:27,844 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3faf055e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:27, skipping insertion in model container [2024-06-21 18:13:27,845 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:13:26" (1/2) ... [2024-06-21 18:13:27,846 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2c1d05c9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:27, skipping insertion in model container [2024-06-21 18:13:27,846 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:13:27" (2/2) ... [2024-06-21 18:13:27,846 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3faf055e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:27, skipping insertion in model container [2024-06-21 18:13:27,846 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:13:27" (2/2) ... [2024-06-21 18:13:27,846 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 18:13:27,865 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 18:13:27,867 INFO L97 edCorrectnessWitness]: Location invariant before [L778-L778] ! multithreaded || ((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) [2024-06-21 18:13:27,867 INFO L97 edCorrectnessWitness]: Location invariant before [L776-L776] ! multithreaded || ((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) [2024-06-21 18:13:27,867 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ! multithreaded || ((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) [2024-06-21 18:13:27,868 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 18:13:27,868 INFO L106 edCorrectnessWitness]: ghost_update [L774-L774] multithreaded = 1; [2024-06-21 18:13:27,900 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 18:13:28,167 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:13:28,196 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 18:13:28,275 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:13:28,301 INFO L206 MainTranslator]: Completed translation [2024-06-21 18:13:28,301 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:28 WrapperNode [2024-06-21 18:13:28,301 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 18:13:28,302 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 18:13:28,302 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 18:13:28,302 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 18:13:28,307 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:28" (1/1) ... [2024-06-21 18:13:28,315 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:28" (1/1) ... [2024-06-21 18:13:28,331 INFO L138 Inliner]: procedures = 175, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-21 18:13:28,331 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 18:13:28,332 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 18:13:28,332 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 18:13:28,332 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 18:13:28,339 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:28" (1/1) ... [2024-06-21 18:13:28,340 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:28" (1/1) ... [2024-06-21 18:13:28,344 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:28" (1/1) ... [2024-06-21 18:13:28,356 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 18:13:28,356 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:28" (1/1) ... [2024-06-21 18:13:28,357 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:28" (1/1) ... [2024-06-21 18:13:28,366 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:28" (1/1) ... [2024-06-21 18:13:28,367 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:28" (1/1) ... [2024-06-21 18:13:28,368 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:28" (1/1) ... [2024-06-21 18:13:28,369 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:28" (1/1) ... [2024-06-21 18:13:28,370 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 18:13:28,371 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 18:13:28,371 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 18:13:28,371 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 18:13:28,371 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:28" (1/1) ... [2024-06-21 18:13:28,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:13:28,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 18:13:28,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 18:13:28,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 18:13:28,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 18:13:28,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 18:13:28,447 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 18:13:28,447 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 18:13:28,447 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 18:13:28,447 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 18:13:28,448 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 18:13:28,448 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 18:13:28,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 18:13:28,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 18:13:28,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 18:13:28,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 18:13:28,450 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 18:13:28,588 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 18:13:28,590 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 18:13:28,718 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 18:13:28,719 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 18:13:28,789 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 18:13:28,789 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 18:13:28,790 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:13:28 BoogieIcfgContainer [2024-06-21 18:13:28,790 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 18:13:28,792 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 18:13:28,792 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 18:13:28,794 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 18:13:28,795 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:13:26" (1/4) ... [2024-06-21 18:13:28,795 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5160da65 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:13:28, skipping insertion in model container [2024-06-21 18:13:28,795 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 06:13:27" (2/4) ... [2024-06-21 18:13:28,795 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5160da65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:13:28, skipping insertion in model container [2024-06-21 18:13:28,795 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:28" (3/4) ... [2024-06-21 18:13:28,796 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5160da65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:13:28, skipping insertion in model container [2024-06-21 18:13:28,796 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:13:28" (4/4) ... [2024-06-21 18:13:28,797 INFO L112 eAbstractionObserver]: Analyzing ICFG safe026_tso.i [2024-06-21 18:13:28,809 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 18:13:28,809 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 18:13:28,809 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 18:13:28,863 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 18:13:28,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 39 transitions, 90 flow [2024-06-21 18:13:28,909 INFO L124 PetriNetUnfolderBase]: 0/36 cut-off events. [2024-06-21 18:13:28,915 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:13:28,917 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. [2024-06-21 18:13:28,918 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 39 transitions, 90 flow [2024-06-21 18:13:28,920 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 30 transitions, 69 flow [2024-06-21 18:13:28,927 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 18:13:28,932 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;@15907309, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 18:13:28,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 18:13:28,936 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 18:13:28,936 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 18:13:28,937 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:13:28,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:28,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 18:13:28,938 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:28,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:28,942 INFO L85 PathProgramCache]: Analyzing trace with hash 215546049, now seen corresponding path program 1 times [2024-06-21 18:13:28,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:28,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876534744] [2024-06-21 18:13:28,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:28,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:29,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:29,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876534744] [2024-06-21 18:13:29,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876534744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:29,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:29,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 18:13:29,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576350005] [2024-06-21 18:13:29,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:29,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 18:13:29,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:29,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 18:13:29,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 18:13:29,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 39 [2024-06-21 18:13:29,316 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) [2024-06-21 18:13:29,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:29,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 39 [2024-06-21 18:13:29,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:29,459 INFO L124 PetriNetUnfolderBase]: 474/795 cut-off events. [2024-06-21 18:13:29,459 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-06-21 18:13:29,465 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. [2024-06-21 18:13:29,472 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 27 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-06-21 18:13:29,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 157 flow [2024-06-21 18:13:29,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 18:13:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 18:13:29,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-21 18:13:29,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7008547008547008 [2024-06-21 18:13:29,483 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 69 flow. Second operand 3 states and 82 transitions. [2024-06-21 18:13:29,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 157 flow [2024-06-21 18:13:29,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 152 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:29,487 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 96 flow [2024-06-21 18:13:29,489 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} [2024-06-21 18:13:29,492 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2024-06-21 18:13:29,492 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 96 flow [2024-06-21 18:13:29,493 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) [2024-06-21 18:13:29,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:29,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:29,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 18:13:29,493 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:29,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:29,495 INFO L85 PathProgramCache]: Analyzing trace with hash 981332192, now seen corresponding path program 1 times [2024-06-21 18:13:29,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:29,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71166306] [2024-06-21 18:13:29,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:29,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:29,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:29,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71166306] [2024-06-21 18:13:29,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71166306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:29,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:29,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 18:13:29,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22436331] [2024-06-21 18:13:29,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:29,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 18:13:29,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:29,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 18:13:29,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 18:13:29,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-21 18:13:29,655 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) [2024-06-21 18:13:29,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:29,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-21 18:13:29,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:29,789 INFO L124 PetriNetUnfolderBase]: 598/1010 cut-off events. [2024-06-21 18:13:29,790 INFO L125 PetriNetUnfolderBase]: For 211/249 co-relation queries the response was YES. [2024-06-21 18:13:29,792 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. [2024-06-21 18:13:29,831 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 38 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-21 18:13:29,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 242 flow [2024-06-21 18:13:29,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:13:29,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:13:29,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-21 18:13:29,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6730769230769231 [2024-06-21 18:13:29,833 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 96 flow. Second operand 4 states and 105 transitions. [2024-06-21 18:13:29,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 242 flow [2024-06-21 18:13:29,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 18:13:29,835 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 148 flow [2024-06-21 18:13:29,835 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} [2024-06-21 18:13:29,837 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2024-06-21 18:13:29,837 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 148 flow [2024-06-21 18:13:29,837 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) [2024-06-21 18:13:29,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:29,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:29,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 18:13:29,838 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)] === [2024-06-21 18:13:29,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:29,839 INFO L85 PathProgramCache]: Analyzing trace with hash 356527232, now seen corresponding path program 1 times [2024-06-21 18:13:29,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:29,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134632815] [2024-06-21 18:13:29,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:29,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:30,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:30,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:30,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134632815] [2024-06-21 18:13:30,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134632815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:30,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:30,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:13:30,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556469609] [2024-06-21 18:13:30,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:30,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:13:30,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:30,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:13:30,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:13:30,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:30,038 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) [2024-06-21 18:13:30,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:30,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:30,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:30,161 INFO L124 PetriNetUnfolderBase]: 733/1219 cut-off events. [2024-06-21 18:13:30,162 INFO L125 PetriNetUnfolderBase]: For 656/656 co-relation queries the response was YES. [2024-06-21 18:13:30,164 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. [2024-06-21 18:13:30,171 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 58 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-06-21 18:13:30,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 79 transitions, 427 flow [2024-06-21 18:13:30,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:30,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:30,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-21 18:13:30,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6871794871794872 [2024-06-21 18:13:30,177 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 148 flow. Second operand 5 states and 134 transitions. [2024-06-21 18:13:30,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 79 transitions, 427 flow [2024-06-21 18:13:30,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 79 transitions, 423 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 18:13:30,182 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 258 flow [2024-06-21 18:13:30,182 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} [2024-06-21 18:13:30,184 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 11 predicate places. [2024-06-21 18:13:30,184 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 258 flow [2024-06-21 18:13:30,184 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) [2024-06-21 18:13:30,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:30,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:30,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 18:13:30,185 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:30,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:30,186 INFO L85 PathProgramCache]: Analyzing trace with hash -974701441, now seen corresponding path program 1 times [2024-06-21 18:13:30,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:30,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549689211] [2024-06-21 18:13:30,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:30,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:30,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:30,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549689211] [2024-06-21 18:13:30,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549689211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:30,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:30,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:30,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779578955] [2024-06-21 18:13:30,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:30,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:30,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:30,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:30,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:30,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:30,307 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) [2024-06-21 18:13:30,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:30,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:30,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:30,492 INFO L124 PetriNetUnfolderBase]: 794/1330 cut-off events. [2024-06-21 18:13:30,493 INFO L125 PetriNetUnfolderBase]: For 1626/1626 co-relation queries the response was YES. [2024-06-21 18:13:30,495 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. [2024-06-21 18:13:30,500 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 65 selfloop transitions, 16 changer transitions 0/88 dead transitions. [2024-06-21 18:13:30,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 88 transitions, 544 flow [2024-06-21 18:13:30,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:30,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 18:13:30,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6709401709401709 [2024-06-21 18:13:30,502 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 258 flow. Second operand 6 states and 157 transitions. [2024-06-21 18:13:30,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 88 transitions, 544 flow [2024-06-21 18:13:30,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 88 transitions, 540 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 18:13:30,506 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 302 flow [2024-06-21 18:13:30,506 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} [2024-06-21 18:13:30,507 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 16 predicate places. [2024-06-21 18:13:30,507 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 302 flow [2024-06-21 18:13:30,507 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) [2024-06-21 18:13:30,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:30,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:30,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 18:13:30,508 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:30,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:30,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1016137361, now seen corresponding path program 1 times [2024-06-21 18:13:30,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:30,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669941670] [2024-06-21 18:13:30,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:30,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:30,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:30,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669941670] [2024-06-21 18:13:30,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669941670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:30,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:30,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 18:13:30,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303549986] [2024-06-21 18:13:30,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:30,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 18:13:30,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:30,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 18:13:30,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 18:13:30,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-21 18:13:30,634 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) [2024-06-21 18:13:30,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:30,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-21 18:13:30,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:30,731 INFO L124 PetriNetUnfolderBase]: 692/1222 cut-off events. [2024-06-21 18:13:30,732 INFO L125 PetriNetUnfolderBase]: For 1998/2034 co-relation queries the response was YES. [2024-06-21 18:13:30,735 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. [2024-06-21 18:13:30,741 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 49 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2024-06-21 18:13:30,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 66 transitions, 456 flow [2024-06-21 18:13:30,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:13:30,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:13:30,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-21 18:13:30,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-21 18:13:30,742 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 302 flow. Second operand 4 states and 100 transitions. [2024-06-21 18:13:30,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 66 transitions, 456 flow [2024-06-21 18:13:30,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 66 transitions, 420 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:30,749 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 308 flow [2024-06-21 18:13:30,749 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} [2024-06-21 18:13:30,751 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 17 predicate places. [2024-06-21 18:13:30,751 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 308 flow [2024-06-21 18:13:30,752 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) [2024-06-21 18:13:30,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:30,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:30,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 18:13:30,756 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:30,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:30,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1563176170, now seen corresponding path program 1 times [2024-06-21 18:13:30,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:30,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13852858] [2024-06-21 18:13:30,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:30,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:30,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:30,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13852858] [2024-06-21 18:13:30,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13852858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:30,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:30,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:13:30,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881391359] [2024-06-21 18:13:30,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:30,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:13:30,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:30,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:13:30,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:13:30,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:30,902 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) [2024-06-21 18:13:30,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:30,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:30,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:31,030 INFO L124 PetriNetUnfolderBase]: 795/1323 cut-off events. [2024-06-21 18:13:31,031 INFO L125 PetriNetUnfolderBase]: For 2606/2606 co-relation queries the response was YES. [2024-06-21 18:13:31,034 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. [2024-06-21 18:13:31,040 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 55 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2024-06-21 18:13:31,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 79 transitions, 545 flow [2024-06-21 18:13:31,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:31,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:31,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 18:13:31,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6512820512820513 [2024-06-21 18:13:31,042 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 308 flow. Second operand 5 states and 127 transitions. [2024-06-21 18:13:31,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 79 transitions, 545 flow [2024-06-21 18:13:31,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 531 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:31,046 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 375 flow [2024-06-21 18:13:31,046 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} [2024-06-21 18:13:31,047 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 21 predicate places. [2024-06-21 18:13:31,047 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 375 flow [2024-06-21 18:13:31,047 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) [2024-06-21 18:13:31,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:31,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:31,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 18:13:31,048 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:31,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:31,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1550084008, now seen corresponding path program 2 times [2024-06-21 18:13:31,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:31,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845432898] [2024-06-21 18:13:31,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:31,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:31,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:31,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845432898] [2024-06-21 18:13:31,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845432898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:31,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:31,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:13:31,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648296570] [2024-06-21 18:13:31,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:31,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:13:31,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:31,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:13:31,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:13:31,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:31,197 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) [2024-06-21 18:13:31,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:31,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:31,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:31,302 INFO L124 PetriNetUnfolderBase]: 775/1280 cut-off events. [2024-06-21 18:13:31,302 INFO L125 PetriNetUnfolderBase]: For 3358/3362 co-relation queries the response was YES. [2024-06-21 18:13:31,304 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. [2024-06-21 18:13:31,310 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 49 selfloop transitions, 19 changer transitions 0/75 dead transitions. [2024-06-21 18:13:31,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 75 transitions, 557 flow [2024-06-21 18:13:31,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:31,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:31,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 18:13:31,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-06-21 18:13:31,312 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 375 flow. Second operand 5 states and 123 transitions. [2024-06-21 18:13:31,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 75 transitions, 557 flow [2024-06-21 18:13:31,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 75 transitions, 536 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:31,316 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 408 flow [2024-06-21 18:13:31,316 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} [2024-06-21 18:13:31,318 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 24 predicate places. [2024-06-21 18:13:31,318 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 408 flow [2024-06-21 18:13:31,318 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) [2024-06-21 18:13:31,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:31,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:31,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 18:13:31,319 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:31,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:31,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1566480342, now seen corresponding path program 1 times [2024-06-21 18:13:31,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:31,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370210022] [2024-06-21 18:13:31,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:31,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:31,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:31,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:31,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370210022] [2024-06-21 18:13:31,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370210022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:31,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:31,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:13:31,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147529409] [2024-06-21 18:13:31,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:31,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:13:31,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:31,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:13:31,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:13:31,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-21 18:13:31,487 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) [2024-06-21 18:13:31,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:31,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-21 18:13:31,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:31,599 INFO L124 PetriNetUnfolderBase]: 657/1172 cut-off events. [2024-06-21 18:13:31,600 INFO L125 PetriNetUnfolderBase]: For 3344/3360 co-relation queries the response was YES. [2024-06-21 18:13:31,602 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. [2024-06-21 18:13:31,607 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 59 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2024-06-21 18:13:31,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 78 transitions, 596 flow [2024-06-21 18:13:31,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:31,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:31,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-21 18:13:31,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6256410256410256 [2024-06-21 18:13:31,608 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 408 flow. Second operand 5 states and 122 transitions. [2024-06-21 18:13:31,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 78 transitions, 596 flow [2024-06-21 18:13:31,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 78 transitions, 569 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:31,614 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 422 flow [2024-06-21 18:13:31,614 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} [2024-06-21 18:13:31,615 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 27 predicate places. [2024-06-21 18:13:31,615 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 422 flow [2024-06-21 18:13:31,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:31,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:31,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:31,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 18:13:31,616 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:31,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:31,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1939018475, now seen corresponding path program 1 times [2024-06-21 18:13:31,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:31,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73058855] [2024-06-21 18:13:31,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:31,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:31,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:31,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:31,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73058855] [2024-06-21 18:13:31,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73058855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:31,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:31,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:31,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524252984] [2024-06-21 18:13:31,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:31,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:31,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:31,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:31,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:31,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:31,742 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) [2024-06-21 18:13:31,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:31,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:31,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:31,911 INFO L124 PetriNetUnfolderBase]: 842/1405 cut-off events. [2024-06-21 18:13:31,911 INFO L125 PetriNetUnfolderBase]: For 5543/5543 co-relation queries the response was YES. [2024-06-21 18:13:31,913 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. [2024-06-21 18:13:31,918 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 63 selfloop transitions, 20 changer transitions 0/90 dead transitions. [2024-06-21 18:13:31,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 90 transitions, 670 flow [2024-06-21 18:13:31,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:31,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:31,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 18:13:31,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6367521367521367 [2024-06-21 18:13:31,920 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 422 flow. Second operand 6 states and 149 transitions. [2024-06-21 18:13:31,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 90 transitions, 670 flow [2024-06-21 18:13:31,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 90 transitions, 647 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:31,932 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 465 flow [2024-06-21 18:13:31,932 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} [2024-06-21 18:13:31,933 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 30 predicate places. [2024-06-21 18:13:31,933 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 465 flow [2024-06-21 18:13:31,933 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) [2024-06-21 18:13:31,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:31,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:31,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 18:13:31,934 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:31,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:31,934 INFO L85 PathProgramCache]: Analyzing trace with hash -910121547, now seen corresponding path program 2 times [2024-06-21 18:13:31,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:31,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005851049] [2024-06-21 18:13:31,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:31,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:32,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:32,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:32,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005851049] [2024-06-21 18:13:32,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005851049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:32,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:32,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:32,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866812650] [2024-06-21 18:13:32,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:32,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:32,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:32,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:32,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:32,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:32,118 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) [2024-06-21 18:13:32,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:32,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:32,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:32,252 INFO L124 PetriNetUnfolderBase]: 859/1436 cut-off events. [2024-06-21 18:13:32,252 INFO L125 PetriNetUnfolderBase]: For 6369/6373 co-relation queries the response was YES. [2024-06-21 18:13:32,255 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. [2024-06-21 18:13:32,263 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 58 selfloop transitions, 21 changer transitions 0/86 dead transitions. [2024-06-21 18:13:32,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 86 transitions, 691 flow [2024-06-21 18:13:32,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:32,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:32,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 18:13:32,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-21 18:13:32,265 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 465 flow. Second operand 6 states and 144 transitions. [2024-06-21 18:13:32,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 86 transitions, 691 flow [2024-06-21 18:13:32,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 86 transitions, 647 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:32,273 INFO L231 Difference]: Finished difference. Result has 72 places, 66 transitions, 492 flow [2024-06-21 18:13:32,273 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} [2024-06-21 18:13:32,274 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 32 predicate places. [2024-06-21 18:13:32,274 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 66 transitions, 492 flow [2024-06-21 18:13:32,275 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) [2024-06-21 18:13:32,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:32,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:32,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 18:13:32,275 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:32,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:32,276 INFO L85 PathProgramCache]: Analyzing trace with hash 490627595, now seen corresponding path program 3 times [2024-06-21 18:13:32,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:32,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046822504] [2024-06-21 18:13:32,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:32,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:32,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:32,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046822504] [2024-06-21 18:13:32,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046822504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:32,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:32,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:32,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333155631] [2024-06-21 18:13:32,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:32,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:32,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:32,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:32,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:32,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:32,422 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) [2024-06-21 18:13:32,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:32,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:32,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:32,563 INFO L124 PetriNetUnfolderBase]: 851/1424 cut-off events. [2024-06-21 18:13:32,563 INFO L125 PetriNetUnfolderBase]: For 7204/7208 co-relation queries the response was YES. [2024-06-21 18:13:32,566 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. [2024-06-21 18:13:32,571 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 59 selfloop transitions, 26 changer transitions 0/92 dead transitions. [2024-06-21 18:13:32,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 92 transitions, 746 flow [2024-06-21 18:13:32,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:32,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 18:13:32,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2024-06-21 18:13:32,574 INFO L175 Difference]: Start difference. First operand has 72 places, 66 transitions, 492 flow. Second operand 6 states and 148 transitions. [2024-06-21 18:13:32,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 92 transitions, 746 flow [2024-06-21 18:13:32,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 92 transitions, 693 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:32,581 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 524 flow [2024-06-21 18:13:32,582 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} [2024-06-21 18:13:32,582 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 34 predicate places. [2024-06-21 18:13:32,582 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 524 flow [2024-06-21 18:13:32,582 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) [2024-06-21 18:13:32,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:32,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:32,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 18:13:32,583 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:32,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:32,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1032749785, now seen corresponding path program 1 times [2024-06-21 18:13:32,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:32,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858585137] [2024-06-21 18:13:32,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:32,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:32,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:32,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:32,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858585137] [2024-06-21 18:13:32,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858585137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:32,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:32,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:32,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827674650] [2024-06-21 18:13:32,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:32,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:32,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:32,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:32,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:32,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:32,719 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) [2024-06-21 18:13:32,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:32,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:32,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:32,882 INFO L124 PetriNetUnfolderBase]: 928/1556 cut-off events. [2024-06-21 18:13:32,882 INFO L125 PetriNetUnfolderBase]: For 9838/9838 co-relation queries the response was YES. [2024-06-21 18:13:32,886 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. [2024-06-21 18:13:32,891 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 73 selfloop transitions, 21 changer transitions 0/101 dead transitions. [2024-06-21 18:13:32,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 101 transitions, 864 flow [2024-06-21 18:13:32,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:32,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:32,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 18:13:32,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6495726495726496 [2024-06-21 18:13:32,893 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 524 flow. Second operand 6 states and 152 transitions. [2024-06-21 18:13:32,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 101 transitions, 864 flow [2024-06-21 18:13:32,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 101 transitions, 797 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:32,903 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 535 flow [2024-06-21 18:13:32,903 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} [2024-06-21 18:13:32,903 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 36 predicate places. [2024-06-21 18:13:32,903 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 535 flow [2024-06-21 18:13:32,904 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) [2024-06-21 18:13:32,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:32,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:32,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 18:13:32,904 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:32,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:32,905 INFO L85 PathProgramCache]: Analyzing trace with hash -631287087, now seen corresponding path program 1 times [2024-06-21 18:13:32,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:32,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150128653] [2024-06-21 18:13:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:32,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:32,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:33,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150128653] [2024-06-21 18:13:33,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150128653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:33,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:33,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:33,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978658967] [2024-06-21 18:13:33,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:33,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:33,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:33,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:33,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:33,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:33,037 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) [2024-06-21 18:13:33,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:33,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:33,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:33,192 INFO L124 PetriNetUnfolderBase]: 908/1532 cut-off events. [2024-06-21 18:13:33,192 INFO L125 PetriNetUnfolderBase]: For 10328/10328 co-relation queries the response was YES. [2024-06-21 18:13:33,196 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. [2024-06-21 18:13:33,203 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 70 selfloop transitions, 22 changer transitions 0/99 dead transitions. [2024-06-21 18:13:33,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 99 transitions, 795 flow [2024-06-21 18:13:33,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:33,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:33,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 18:13:33,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-21 18:13:33,205 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 535 flow. Second operand 6 states and 150 transitions. [2024-06-21 18:13:33,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 99 transitions, 795 flow [2024-06-21 18:13:33,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 99 transitions, 764 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:33,219 INFO L231 Difference]: Finished difference. Result has 80 places, 70 transitions, 555 flow [2024-06-21 18:13:33,219 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} [2024-06-21 18:13:33,220 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 40 predicate places. [2024-06-21 18:13:33,220 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 70 transitions, 555 flow [2024-06-21 18:13:33,220 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) [2024-06-21 18:13:33,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:33,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:33,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 18:13:33,221 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:33,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:33,221 INFO L85 PathProgramCache]: Analyzing trace with hash -546007499, now seen corresponding path program 2 times [2024-06-21 18:13:33,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:33,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712120221] [2024-06-21 18:13:33,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:33,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:33,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:33,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:33,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712120221] [2024-06-21 18:13:33,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712120221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:33,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:33,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:33,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979483667] [2024-06-21 18:13:33,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:33,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:33,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:33,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:33,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:33,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:33,347 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) [2024-06-21 18:13:33,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:33,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:33,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:33,494 INFO L124 PetriNetUnfolderBase]: 888/1496 cut-off events. [2024-06-21 18:13:33,494 INFO L125 PetriNetUnfolderBase]: For 10723/10727 co-relation queries the response was YES. [2024-06-21 18:13:33,497 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. [2024-06-21 18:13:33,502 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 63 selfloop transitions, 23 changer transitions 0/93 dead transitions. [2024-06-21 18:13:33,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 93 transitions, 761 flow [2024-06-21 18:13:33,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:33,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 18:13:33,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-21 18:13:33,504 INFO L175 Difference]: Start difference. First operand has 80 places, 70 transitions, 555 flow. Second operand 6 states and 143 transitions. [2024-06-21 18:13:33,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 93 transitions, 761 flow [2024-06-21 18:13:33,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 93 transitions, 704 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:33,514 INFO L231 Difference]: Finished difference. Result has 80 places, 69 transitions, 520 flow [2024-06-21 18:13:33,514 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} [2024-06-21 18:13:33,515 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 40 predicate places. [2024-06-21 18:13:33,515 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 520 flow [2024-06-21 18:13:33,515 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) [2024-06-21 18:13:33,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:33,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:33,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 18:13:33,516 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)] === [2024-06-21 18:13:33,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:33,516 INFO L85 PathProgramCache]: Analyzing trace with hash -475218866, now seen corresponding path program 1 times [2024-06-21 18:13:33,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:33,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114378541] [2024-06-21 18:13:33,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:33,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:33,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:33,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114378541] [2024-06-21 18:13:33,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114378541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:33,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:33,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:13:33,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81291275] [2024-06-21 18:13:33,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:33,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:13:33,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:33,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:13:33,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:13:33,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-21 18:13:33,635 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) [2024-06-21 18:13:33,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:33,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-21 18:13:33,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:33,745 INFO L124 PetriNetUnfolderBase]: 806/1432 cut-off events. [2024-06-21 18:13:33,745 INFO L125 PetriNetUnfolderBase]: For 8304/8338 co-relation queries the response was YES. [2024-06-21 18:13:33,748 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. [2024-06-21 18:13:33,752 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 61 selfloop transitions, 17 changer transitions 0/88 dead transitions. [2024-06-21 18:13:33,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 88 transitions, 768 flow [2024-06-21 18:13:33,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:33,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:33,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-21 18:13:33,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-21 18:13:33,754 INFO L175 Difference]: Start difference. First operand has 80 places, 69 transitions, 520 flow. Second operand 5 states and 120 transitions. [2024-06-21 18:13:33,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 88 transitions, 768 flow [2024-06-21 18:13:33,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 88 transitions, 699 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:33,764 INFO L231 Difference]: Finished difference. Result has 80 places, 75 transitions, 529 flow [2024-06-21 18:13:33,765 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} [2024-06-21 18:13:33,765 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 40 predicate places. [2024-06-21 18:13:33,765 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 75 transitions, 529 flow [2024-06-21 18:13:33,765 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) [2024-06-21 18:13:33,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:33,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:33,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 18:13:33,766 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)] === [2024-06-21 18:13:33,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:33,766 INFO L85 PathProgramCache]: Analyzing trace with hash 476611056, now seen corresponding path program 2 times [2024-06-21 18:13:33,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:33,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639351029] [2024-06-21 18:13:33,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:33,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:33,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:33,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639351029] [2024-06-21 18:13:33,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639351029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:33,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:33,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:13:33,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415447139] [2024-06-21 18:13:33,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:33,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:13:33,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:33,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:13:33,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:13:33,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-21 18:13:33,890 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) [2024-06-21 18:13:33,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:33,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-21 18:13:33,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:34,026 INFO L124 PetriNetUnfolderBase]: 798/1420 cut-off events. [2024-06-21 18:13:34,026 INFO L125 PetriNetUnfolderBase]: For 8828/8862 co-relation queries the response was YES. [2024-06-21 18:13:34,029 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. [2024-06-21 18:13:34,034 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 62 selfloop transitions, 14 changer transitions 0/86 dead transitions. [2024-06-21 18:13:34,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 709 flow [2024-06-21 18:13:34,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:13:34,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:13:34,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-21 18:13:34,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-21 18:13:34,035 INFO L175 Difference]: Start difference. First operand has 80 places, 75 transitions, 529 flow. Second operand 4 states and 100 transitions. [2024-06-21 18:13:34,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 709 flow [2024-06-21 18:13:34,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 86 transitions, 683 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-21 18:13:34,049 INFO L231 Difference]: Finished difference. Result has 83 places, 75 transitions, 542 flow [2024-06-21 18:13:34,049 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} [2024-06-21 18:13:34,050 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 43 predicate places. [2024-06-21 18:13:34,050 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 75 transitions, 542 flow [2024-06-21 18:13:34,050 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) [2024-06-21 18:13:34,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:34,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:34,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 18:13:34,051 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)] === [2024-06-21 18:13:34,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:34,051 INFO L85 PathProgramCache]: Analyzing trace with hash 754577910, now seen corresponding path program 1 times [2024-06-21 18:13:34,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:34,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981807651] [2024-06-21 18:13:34,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:34,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:34,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:34,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:34,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981807651] [2024-06-21 18:13:34,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981807651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:34,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:34,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:34,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768616806] [2024-06-21 18:13:34,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:34,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:34,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:34,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:34,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:34,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:34,186 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) [2024-06-21 18:13:34,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:34,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:34,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:34,317 INFO L124 PetriNetUnfolderBase]: 910/1553 cut-off events. [2024-06-21 18:13:34,317 INFO L125 PetriNetUnfolderBase]: For 12481/12481 co-relation queries the response was YES. [2024-06-21 18:13:34,320 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. [2024-06-21 18:13:34,325 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 74 selfloop transitions, 35 changer transitions 0/116 dead transitions. [2024-06-21 18:13:34,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 116 transitions, 990 flow [2024-06-21 18:13:34,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:34,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:34,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 18:13:34,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-21 18:13:34,326 INFO L175 Difference]: Start difference. First operand has 83 places, 75 transitions, 542 flow. Second operand 6 states and 150 transitions. [2024-06-21 18:13:34,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 116 transitions, 990 flow [2024-06-21 18:13:34,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 116 transitions, 948 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:34,338 INFO L231 Difference]: Finished difference. Result has 87 places, 92 transitions, 736 flow [2024-06-21 18:13:34,339 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} [2024-06-21 18:13:34,339 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 47 predicate places. [2024-06-21 18:13:34,339 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 92 transitions, 736 flow [2024-06-21 18:13:34,339 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) [2024-06-21 18:13:34,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:34,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:34,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 18:13:34,340 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)] === [2024-06-21 18:13:34,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:34,340 INFO L85 PathProgramCache]: Analyzing trace with hash 433942997, now seen corresponding path program 1 times [2024-06-21 18:13:34,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:34,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598185941] [2024-06-21 18:13:34,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:34,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:34,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:34,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598185941] [2024-06-21 18:13:34,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598185941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:34,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:34,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:34,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823020434] [2024-06-21 18:13:34,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:34,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:34,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:34,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:34,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:34,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:34,462 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) [2024-06-21 18:13:34,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:34,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:34,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:34,608 INFO L124 PetriNetUnfolderBase]: 920/1572 cut-off events. [2024-06-21 18:13:34,608 INFO L125 PetriNetUnfolderBase]: For 13223/13223 co-relation queries the response was YES. [2024-06-21 18:13:34,611 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. [2024-06-21 18:13:34,616 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 89 selfloop transitions, 22 changer transitions 0/118 dead transitions. [2024-06-21 18:13:34,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 118 transitions, 1121 flow [2024-06-21 18:13:34,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-21 18:13:34,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.594017094017094 [2024-06-21 18:13:34,618 INFO L175 Difference]: Start difference. First operand has 87 places, 92 transitions, 736 flow. Second operand 6 states and 139 transitions. [2024-06-21 18:13:34,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 118 transitions, 1121 flow [2024-06-21 18:13:34,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 118 transitions, 1089 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-21 18:13:34,633 INFO L231 Difference]: Finished difference. Result has 94 places, 101 transitions, 855 flow [2024-06-21 18:13:34,634 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} [2024-06-21 18:13:34,634 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 54 predicate places. [2024-06-21 18:13:34,634 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 101 transitions, 855 flow [2024-06-21 18:13:34,634 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) [2024-06-21 18:13:34,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:34,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:34,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 18:13:34,635 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)] === [2024-06-21 18:13:34,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:34,635 INFO L85 PathProgramCache]: Analyzing trace with hash 433942656, now seen corresponding path program 2 times [2024-06-21 18:13:34,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:34,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000061606] [2024-06-21 18:13:34,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:34,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:34,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:34,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:34,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000061606] [2024-06-21 18:13:34,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000061606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:34,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:34,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:34,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923649164] [2024-06-21 18:13:34,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:34,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:34,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:34,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:34,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:34,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:34,762 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) [2024-06-21 18:13:34,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:34,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:34,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:34,925 INFO L124 PetriNetUnfolderBase]: 948/1618 cut-off events. [2024-06-21 18:13:34,925 INFO L125 PetriNetUnfolderBase]: For 15175/15175 co-relation queries the response was YES. [2024-06-21 18:13:34,929 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. [2024-06-21 18:13:34,934 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 97 selfloop transitions, 23 changer transitions 0/127 dead transitions. [2024-06-21 18:13:34,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 127 transitions, 1238 flow [2024-06-21 18:13:34,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:34,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:34,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-21 18:13:34,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575091575091575 [2024-06-21 18:13:34,935 INFO L175 Difference]: Start difference. First operand has 94 places, 101 transitions, 855 flow. Second operand 7 states and 157 transitions. [2024-06-21 18:13:34,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 127 transitions, 1238 flow [2024-06-21 18:13:34,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 127 transitions, 1200 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-21 18:13:34,953 INFO L231 Difference]: Finished difference. Result has 101 places, 109 transitions, 958 flow [2024-06-21 18:13:34,953 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} [2024-06-21 18:13:34,954 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 61 predicate places. [2024-06-21 18:13:34,954 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 109 transitions, 958 flow [2024-06-21 18:13:34,954 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) [2024-06-21 18:13:34,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:34,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:34,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 18:13:34,955 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)] === [2024-06-21 18:13:34,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:34,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1890243729, now seen corresponding path program 2 times [2024-06-21 18:13:34,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:34,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269635509] [2024-06-21 18:13:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:34,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:35,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:35,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269635509] [2024-06-21 18:13:35,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269635509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:35,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:35,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:35,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221316028] [2024-06-21 18:13:35,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:35,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:35,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:35,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:35,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:35,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:35,070 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) [2024-06-21 18:13:35,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:35,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:35,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:35,207 INFO L124 PetriNetUnfolderBase]: 953/1627 cut-off events. [2024-06-21 18:13:35,208 INFO L125 PetriNetUnfolderBase]: For 16619/16619 co-relation queries the response was YES. [2024-06-21 18:13:35,212 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. [2024-06-21 18:13:35,218 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 100 selfloop transitions, 19 changer transitions 0/126 dead transitions. [2024-06-21 18:13:35,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 126 transitions, 1266 flow [2024-06-21 18:13:35,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:13:35,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:13:35,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-21 18:13:35,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2024-06-21 18:13:35,219 INFO L175 Difference]: Start difference. First operand has 101 places, 109 transitions, 958 flow. Second operand 4 states and 102 transitions. [2024-06-21 18:13:35,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 126 transitions, 1266 flow [2024-06-21 18:13:35,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 126 transitions, 1204 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:35,240 INFO L231 Difference]: Finished difference. Result has 100 places, 112 transitions, 990 flow [2024-06-21 18:13:35,240 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} [2024-06-21 18:13:35,240 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 60 predicate places. [2024-06-21 18:13:35,240 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 112 transitions, 990 flow [2024-06-21 18:13:35,241 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) [2024-06-21 18:13:35,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:35,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:35,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 18:13:35,241 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)] === [2024-06-21 18:13:35,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:35,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1908969581, now seen corresponding path program 3 times [2024-06-21 18:13:35,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:35,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420256221] [2024-06-21 18:13:35,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:35,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:35,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:35,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420256221] [2024-06-21 18:13:35,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420256221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:35,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:35,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:35,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47815669] [2024-06-21 18:13:35,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:35,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:35,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:35,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:35,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:35,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:35,356 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) [2024-06-21 18:13:35,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:35,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:35,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:35,503 INFO L124 PetriNetUnfolderBase]: 950/1623 cut-off events. [2024-06-21 18:13:35,503 INFO L125 PetriNetUnfolderBase]: For 17936/17936 co-relation queries the response was YES. [2024-06-21 18:13:35,507 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. [2024-06-21 18:13:35,512 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 95 selfloop transitions, 25 changer transitions 0/127 dead transitions. [2024-06-21 18:13:35,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 127 transitions, 1268 flow [2024-06-21 18:13:35,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:35,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:35,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-21 18:13:35,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-21 18:13:35,514 INFO L175 Difference]: Start difference. First operand has 100 places, 112 transitions, 990 flow. Second operand 5 states and 120 transitions. [2024-06-21 18:13:35,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 127 transitions, 1268 flow [2024-06-21 18:13:35,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 127 transitions, 1216 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:35,531 INFO L231 Difference]: Finished difference. Result has 103 places, 112 transitions, 998 flow [2024-06-21 18:13:35,531 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} [2024-06-21 18:13:35,531 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 63 predicate places. [2024-06-21 18:13:35,532 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 112 transitions, 998 flow [2024-06-21 18:13:35,532 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) [2024-06-21 18:13:35,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:35,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:35,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 18:13:35,532 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)] === [2024-06-21 18:13:35,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:35,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1908969240, now seen corresponding path program 3 times [2024-06-21 18:13:35,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:35,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321468718] [2024-06-21 18:13:35,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:35,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:35,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:35,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:35,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321468718] [2024-06-21 18:13:35,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321468718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:35,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:35,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:35,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053878638] [2024-06-21 18:13:35,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:35,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:35,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:35,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:35,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:35,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:35,662 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) [2024-06-21 18:13:35,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:35,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:35,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:35,843 INFO L124 PetriNetUnfolderBase]: 970/1644 cut-off events. [2024-06-21 18:13:35,843 INFO L125 PetriNetUnfolderBase]: For 19578/19578 co-relation queries the response was YES. [2024-06-21 18:13:35,848 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. [2024-06-21 18:13:35,889 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 96 selfloop transitions, 47 changer transitions 0/150 dead transitions. [2024-06-21 18:13:35,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 150 transitions, 1473 flow [2024-06-21 18:13:35,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:35,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:35,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 18:13:35,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63003663003663 [2024-06-21 18:13:35,891 INFO L175 Difference]: Start difference. First operand has 103 places, 112 transitions, 998 flow. Second operand 7 states and 172 transitions. [2024-06-21 18:13:35,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 150 transitions, 1473 flow [2024-06-21 18:13:35,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 150 transitions, 1409 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:35,913 INFO L231 Difference]: Finished difference. Result has 108 places, 120 transitions, 1171 flow [2024-06-21 18:13:35,913 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} [2024-06-21 18:13:35,914 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 68 predicate places. [2024-06-21 18:13:35,914 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 120 transitions, 1171 flow [2024-06-21 18:13:35,914 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) [2024-06-21 18:13:35,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:35,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:35,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 18:13:35,915 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:35,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:35,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1890257617, now seen corresponding path program 1 times [2024-06-21 18:13:35,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:35,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462752640] [2024-06-21 18:13:35,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:35,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:36,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:36,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462752640] [2024-06-21 18:13:36,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462752640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:36,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:36,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:36,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674436148] [2024-06-21 18:13:36,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:36,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:36,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:36,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:36,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:36,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:36,068 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) [2024-06-21 18:13:36,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:36,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:36,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:36,215 INFO L124 PetriNetUnfolderBase]: 965/1637 cut-off events. [2024-06-21 18:13:36,216 INFO L125 PetriNetUnfolderBase]: For 19906/19906 co-relation queries the response was YES. [2024-06-21 18:13:36,220 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. [2024-06-21 18:13:36,226 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 114 selfloop transitions, 10 changer transitions 0/131 dead transitions. [2024-06-21 18:13:36,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 131 transitions, 1463 flow [2024-06-21 18:13:36,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:13:36,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:13:36,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-21 18:13:36,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-06-21 18:13:36,227 INFO L175 Difference]: Start difference. First operand has 108 places, 120 transitions, 1171 flow. Second operand 4 states and 94 transitions. [2024-06-21 18:13:36,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 131 transitions, 1463 flow [2024-06-21 18:13:36,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 131 transitions, 1393 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:36,248 INFO L231 Difference]: Finished difference. Result has 109 places, 122 transitions, 1152 flow [2024-06-21 18:13:36,249 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} [2024-06-21 18:13:36,249 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 69 predicate places. [2024-06-21 18:13:36,249 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 122 transitions, 1152 flow [2024-06-21 18:13:36,249 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) [2024-06-21 18:13:36,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:36,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:36,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 18:13:36,250 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:36,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:36,250 INFO L85 PathProgramCache]: Analyzing trace with hash 558990021, now seen corresponding path program 1 times [2024-06-21 18:13:36,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:36,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304455451] [2024-06-21 18:13:36,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:36,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:36,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:36,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304455451] [2024-06-21 18:13:36,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304455451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:36,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:36,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:36,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246547570] [2024-06-21 18:13:36,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:36,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:36,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:36,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:36,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:36,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:36,362 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) [2024-06-21 18:13:36,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:36,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:36,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:36,554 INFO L124 PetriNetUnfolderBase]: 983/1667 cut-off events. [2024-06-21 18:13:36,554 INFO L125 PetriNetUnfolderBase]: For 20350/20350 co-relation queries the response was YES. [2024-06-21 18:13:36,558 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. [2024-06-21 18:13:36,563 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 84 selfloop transitions, 68 changer transitions 0/159 dead transitions. [2024-06-21 18:13:36,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 159 transitions, 1710 flow [2024-06-21 18:13:36,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:36,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:36,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 18:13:36,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63003663003663 [2024-06-21 18:13:36,564 INFO L175 Difference]: Start difference. First operand has 109 places, 122 transitions, 1152 flow. Second operand 7 states and 172 transitions. [2024-06-21 18:13:36,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 159 transitions, 1710 flow [2024-06-21 18:13:36,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 159 transitions, 1675 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:36,589 INFO L231 Difference]: Finished difference. Result has 115 places, 134 transitions, 1423 flow [2024-06-21 18:13:36,589 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} [2024-06-21 18:13:36,590 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 75 predicate places. [2024-06-21 18:13:36,590 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 134 transitions, 1423 flow [2024-06-21 18:13:36,590 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) [2024-06-21 18:13:36,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:36,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:36,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 18:13:36,591 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)] === [2024-06-21 18:13:36,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:36,591 INFO L85 PathProgramCache]: Analyzing trace with hash 562563949, now seen corresponding path program 1 times [2024-06-21 18:13:36,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:36,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818836530] [2024-06-21 18:13:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:36,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:36,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:36,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818836530] [2024-06-21 18:13:36,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818836530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:36,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:36,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:36,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312478809] [2024-06-21 18:13:36,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:36,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:36,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:36,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:36,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:36,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:36,698 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) [2024-06-21 18:13:36,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:36,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:36,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:36,864 INFO L124 PetriNetUnfolderBase]: 1001/1692 cut-off events. [2024-06-21 18:13:36,864 INFO L125 PetriNetUnfolderBase]: For 23893/23893 co-relation queries the response was YES. [2024-06-21 18:13:36,869 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. [2024-06-21 18:13:36,875 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 98 selfloop transitions, 59 changer transitions 0/164 dead transitions. [2024-06-21 18:13:36,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 164 transitions, 1994 flow [2024-06-21 18:13:36,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:36,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:36,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 18:13:36,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2024-06-21 18:13:36,876 INFO L175 Difference]: Start difference. First operand has 115 places, 134 transitions, 1423 flow. Second operand 6 states and 147 transitions. [2024-06-21 18:13:36,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 164 transitions, 1994 flow [2024-06-21 18:13:36,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 164 transitions, 1928 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:36,909 INFO L231 Difference]: Finished difference. Result has 120 places, 143 transitions, 1629 flow [2024-06-21 18:13:36,909 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} [2024-06-21 18:13:36,909 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 80 predicate places. [2024-06-21 18:13:36,909 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 143 transitions, 1629 flow [2024-06-21 18:13:36,910 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) [2024-06-21 18:13:36,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:36,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:36,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 18:13:36,910 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)] === [2024-06-21 18:13:36,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:36,910 INFO L85 PathProgramCache]: Analyzing trace with hash 567325549, now seen corresponding path program 2 times [2024-06-21 18:13:36,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:36,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794197942] [2024-06-21 18:13:36,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:36,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:37,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:37,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794197942] [2024-06-21 18:13:37,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794197942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:37,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:37,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:37,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492221532] [2024-06-21 18:13:37,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:37,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:37,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:37,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:37,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:37,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:37,040 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) [2024-06-21 18:13:37,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:37,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:37,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:37,234 INFO L124 PetriNetUnfolderBase]: 993/1683 cut-off events. [2024-06-21 18:13:37,234 INFO L125 PetriNetUnfolderBase]: For 25076/25076 co-relation queries the response was YES. [2024-06-21 18:13:37,239 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. [2024-06-21 18:13:37,245 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 130 selfloop transitions, 23 changer transitions 0/160 dead transitions. [2024-06-21 18:13:37,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 160 transitions, 1977 flow [2024-06-21 18:13:37,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:37,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-21 18:13:37,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 18:13:37,246 INFO L175 Difference]: Start difference. First operand has 120 places, 143 transitions, 1629 flow. Second operand 7 states and 156 transitions. [2024-06-21 18:13:37,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 160 transitions, 1977 flow [2024-06-21 18:13:37,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 160 transitions, 1889 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:37,286 INFO L231 Difference]: Finished difference. Result has 125 places, 143 transitions, 1595 flow [2024-06-21 18:13:37,287 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} [2024-06-21 18:13:37,287 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 85 predicate places. [2024-06-21 18:13:37,287 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 143 transitions, 1595 flow [2024-06-21 18:13:37,288 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) [2024-06-21 18:13:37,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:37,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:37,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 18:13:37,288 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)] === [2024-06-21 18:13:37,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:37,289 INFO L85 PathProgramCache]: Analyzing trace with hash 567321891, now seen corresponding path program 2 times [2024-06-21 18:13:37,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:37,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389857467] [2024-06-21 18:13:37,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:37,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:37,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:37,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389857467] [2024-06-21 18:13:37,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389857467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:37,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:37,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:37,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542138198] [2024-06-21 18:13:37,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:37,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:37,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:37,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:37,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:37,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:37,416 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) [2024-06-21 18:13:37,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:37,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:37,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:37,619 INFO L124 PetriNetUnfolderBase]: 1035/1754 cut-off events. [2024-06-21 18:13:37,620 INFO L125 PetriNetUnfolderBase]: For 28042/28042 co-relation queries the response was YES. [2024-06-21 18:13:37,625 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. [2024-06-21 18:13:37,631 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 125 selfloop transitions, 43 changer transitions 0/175 dead transitions. [2024-06-21 18:13:37,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 175 transitions, 2193 flow [2024-06-21 18:13:37,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:37,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:37,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-21 18:13:37,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 18:13:37,633 INFO L175 Difference]: Start difference. First operand has 125 places, 143 transitions, 1595 flow. Second operand 8 states and 182 transitions. [2024-06-21 18:13:37,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 175 transitions, 2193 flow [2024-06-21 18:13:37,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 175 transitions, 2147 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:37,675 INFO L231 Difference]: Finished difference. Result has 128 places, 155 transitions, 1792 flow [2024-06-21 18:13:37,675 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} [2024-06-21 18:13:37,676 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 88 predicate places. [2024-06-21 18:13:37,676 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 155 transitions, 1792 flow [2024-06-21 18:13:37,676 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) [2024-06-21 18:13:37,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:37,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:37,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 18:13:37,676 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:37,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:37,677 INFO L85 PathProgramCache]: Analyzing trace with hash 567332121, now seen corresponding path program 3 times [2024-06-21 18:13:37,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:37,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294604988] [2024-06-21 18:13:37,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:37,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:37,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:37,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294604988] [2024-06-21 18:13:37,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294604988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:37,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:37,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:37,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803704998] [2024-06-21 18:13:37,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:37,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:37,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:37,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:37,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:37,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:37,807 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) [2024-06-21 18:13:37,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:37,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:37,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:38,004 INFO L124 PetriNetUnfolderBase]: 1031/1749 cut-off events. [2024-06-21 18:13:38,005 INFO L125 PetriNetUnfolderBase]: For 29655/29655 co-relation queries the response was YES. [2024-06-21 18:13:38,010 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. [2024-06-21 18:13:38,016 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 126 selfloop transitions, 42 changer transitions 0/175 dead transitions. [2024-06-21 18:13:38,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 175 transitions, 2224 flow [2024-06-21 18:13:38,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-21 18:13:38,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-21 18:13:38,017 INFO L175 Difference]: Start difference. First operand has 128 places, 155 transitions, 1792 flow. Second operand 9 states and 198 transitions. [2024-06-21 18:13:38,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 175 transitions, 2224 flow [2024-06-21 18:13:38,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 175 transitions, 2150 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:38,063 INFO L231 Difference]: Finished difference. Result has 134 places, 155 transitions, 1810 flow [2024-06-21 18:13:38,064 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} [2024-06-21 18:13:38,064 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 94 predicate places. [2024-06-21 18:13:38,064 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 155 transitions, 1810 flow [2024-06-21 18:13:38,064 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) [2024-06-21 18:13:38,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:38,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:38,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 18:13:38,065 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)] === [2024-06-21 18:13:38,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:38,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1758673773, now seen corresponding path program 3 times [2024-06-21 18:13:38,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:38,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939881022] [2024-06-21 18:13:38,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:38,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:38,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:38,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939881022] [2024-06-21 18:13:38,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939881022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:38,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:38,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:38,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983534440] [2024-06-21 18:13:38,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:38,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:38,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:38,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:38,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:38,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:38,186 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) [2024-06-21 18:13:38,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:38,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:38,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:38,381 INFO L124 PetriNetUnfolderBase]: 1036/1751 cut-off events. [2024-06-21 18:13:38,381 INFO L125 PetriNetUnfolderBase]: For 32733/32737 co-relation queries the response was YES. [2024-06-21 18:13:38,386 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. [2024-06-21 18:13:38,391 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 105 selfloop transitions, 65 changer transitions 0/177 dead transitions. [2024-06-21 18:13:38,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 177 transitions, 2391 flow [2024-06-21 18:13:38,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:38,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:38,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 18:13:38,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6196581196581197 [2024-06-21 18:13:38,392 INFO L175 Difference]: Start difference. First operand has 134 places, 155 transitions, 1810 flow. Second operand 6 states and 145 transitions. [2024-06-21 18:13:38,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 177 transitions, 2391 flow [2024-06-21 18:13:38,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 177 transitions, 2300 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:38,448 INFO L231 Difference]: Finished difference. Result has 133 places, 158 transitions, 1900 flow [2024-06-21 18:13:38,449 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} [2024-06-21 18:13:38,449 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 93 predicate places. [2024-06-21 18:13:38,449 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 158 transitions, 1900 flow [2024-06-21 18:13:38,450 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) [2024-06-21 18:13:38,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:38,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:38,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 18:13:38,450 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:38,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:38,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1769149293, now seen corresponding path program 4 times [2024-06-21 18:13:38,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:38,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339673589] [2024-06-21 18:13:38,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:38,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:38,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:38,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339673589] [2024-06-21 18:13:38,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339673589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:38,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:38,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:38,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621913358] [2024-06-21 18:13:38,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:38,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:38,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:38,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:38,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:38,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:38,574 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) [2024-06-21 18:13:38,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:38,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:38,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:38,756 INFO L124 PetriNetUnfolderBase]: 1033/1747 cut-off events. [2024-06-21 18:13:38,756 INFO L125 PetriNetUnfolderBase]: For 34698/34702 co-relation queries the response was YES. [2024-06-21 18:13:38,762 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. [2024-06-21 18:13:38,768 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 101 selfloop transitions, 65 changer transitions 0/173 dead transitions. [2024-06-21 18:13:38,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 173 transitions, 2372 flow [2024-06-21 18:13:38,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:38,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:38,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 18:13:38,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6068376068376068 [2024-06-21 18:13:38,769 INFO L175 Difference]: Start difference. First operand has 133 places, 158 transitions, 1900 flow. Second operand 6 states and 142 transitions. [2024-06-21 18:13:38,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 173 transitions, 2372 flow [2024-06-21 18:13:38,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 173 transitions, 2143 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:38,838 INFO L231 Difference]: Finished difference. Result has 133 places, 158 transitions, 1807 flow [2024-06-21 18:13:38,839 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} [2024-06-21 18:13:38,839 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 93 predicate places. [2024-06-21 18:13:38,840 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 158 transitions, 1807 flow [2024-06-21 18:13:38,840 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) [2024-06-21 18:13:38,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:38,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:38,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 18:13:38,840 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:38,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:38,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1538242545, now seen corresponding path program 5 times [2024-06-21 18:13:38,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:38,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10185519] [2024-06-21 18:13:38,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:38,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:38,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:38,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10185519] [2024-06-21 18:13:38,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10185519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:38,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:38,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:38,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841387699] [2024-06-21 18:13:38,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:38,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:38,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:38,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:38,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:38,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:38,968 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) [2024-06-21 18:13:38,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:38,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:38,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:39,195 INFO L124 PetriNetUnfolderBase]: 1030/1750 cut-off events. [2024-06-21 18:13:39,196 INFO L125 PetriNetUnfolderBase]: For 35022/35028 co-relation queries the response was YES. [2024-06-21 18:13:39,202 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. [2024-06-21 18:13:39,208 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 126 selfloop transitions, 48 changer transitions 0/181 dead transitions. [2024-06-21 18:13:39,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 181 transitions, 2267 flow [2024-06-21 18:13:39,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:39,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:39,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 18:13:39,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6367521367521367 [2024-06-21 18:13:39,222 INFO L175 Difference]: Start difference. First operand has 133 places, 158 transitions, 1807 flow. Second operand 6 states and 149 transitions. [2024-06-21 18:13:39,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 181 transitions, 2267 flow [2024-06-21 18:13:39,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 181 transitions, 2116 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:39,279 INFO L231 Difference]: Finished difference. Result has 135 places, 158 transitions, 1762 flow [2024-06-21 18:13:39,279 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} [2024-06-21 18:13:39,279 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 95 predicate places. [2024-06-21 18:13:39,279 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 158 transitions, 1762 flow [2024-06-21 18:13:39,279 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) [2024-06-21 18:13:39,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:39,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:39,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 18:13:39,280 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:39,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:39,281 INFO L85 PathProgramCache]: Analyzing trace with hash -951490603, now seen corresponding path program 6 times [2024-06-21 18:13:39,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:39,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347021165] [2024-06-21 18:13:39,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:39,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:39,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:39,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347021165] [2024-06-21 18:13:39,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347021165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:39,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:39,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:39,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606802137] [2024-06-21 18:13:39,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:39,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:39,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:39,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:39,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:39,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:39,400 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) [2024-06-21 18:13:39,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:39,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:39,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:39,610 INFO L124 PetriNetUnfolderBase]: 1022/1736 cut-off events. [2024-06-21 18:13:39,610 INFO L125 PetriNetUnfolderBase]: For 35958/35958 co-relation queries the response was YES. [2024-06-21 18:13:39,616 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. [2024-06-21 18:13:39,621 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 132 selfloop transitions, 48 changer transitions 0/187 dead transitions. [2024-06-21 18:13:39,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 187 transitions, 2196 flow [2024-06-21 18:13:39,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:39,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:39,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 18:13:39,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63003663003663 [2024-06-21 18:13:39,623 INFO L175 Difference]: Start difference. First operand has 135 places, 158 transitions, 1762 flow. Second operand 7 states and 172 transitions. [2024-06-21 18:13:39,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 187 transitions, 2196 flow [2024-06-21 18:13:39,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 187 transitions, 2108 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:39,689 INFO L231 Difference]: Finished difference. Result has 137 places, 158 transitions, 1790 flow [2024-06-21 18:13:39,689 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} [2024-06-21 18:13:39,690 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 97 predicate places. [2024-06-21 18:13:39,690 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 158 transitions, 1790 flow [2024-06-21 18:13:39,690 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) [2024-06-21 18:13:39,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:39,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:39,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 18:13:39,691 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:39,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:39,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1543949893, now seen corresponding path program 4 times [2024-06-21 18:13:39,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:39,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646214555] [2024-06-21 18:13:39,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:39,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:39,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:39,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:39,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646214555] [2024-06-21 18:13:39,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646214555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:39,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:39,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:39,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396840251] [2024-06-21 18:13:39,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:39,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:39,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:39,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:39,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:39,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:39,789 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) [2024-06-21 18:13:39,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:39,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:39,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:40,027 INFO L124 PetriNetUnfolderBase]: 1090/1847 cut-off events. [2024-06-21 18:13:40,027 INFO L125 PetriNetUnfolderBase]: For 39199/39199 co-relation queries the response was YES. [2024-06-21 18:13:40,033 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. [2024-06-21 18:13:40,039 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 117 selfloop transitions, 83 changer transitions 0/207 dead transitions. [2024-06-21 18:13:40,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 207 transitions, 2602 flow [2024-06-21 18:13:40,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:40,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:40,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-21 18:13:40,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603988603988604 [2024-06-21 18:13:40,040 INFO L175 Difference]: Start difference. First operand has 137 places, 158 transitions, 1790 flow. Second operand 9 states and 212 transitions. [2024-06-21 18:13:40,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 207 transitions, 2602 flow [2024-06-21 18:13:40,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 207 transitions, 2448 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:40,109 INFO L231 Difference]: Finished difference. Result has 138 places, 175 transitions, 2051 flow [2024-06-21 18:13:40,109 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} [2024-06-21 18:13:40,109 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 98 predicate places. [2024-06-21 18:13:40,109 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 175 transitions, 2051 flow [2024-06-21 18:13:40,109 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) [2024-06-21 18:13:40,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:40,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:40,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 18:13:40,110 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:40,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:40,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1531985443, now seen corresponding path program 5 times [2024-06-21 18:13:40,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:40,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255563557] [2024-06-21 18:13:40,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:40,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:40,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:40,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255563557] [2024-06-21 18:13:40,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255563557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:40,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:40,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:40,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130416705] [2024-06-21 18:13:40,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:40,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:40,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:40,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:40,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:40,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:40,242 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) [2024-06-21 18:13:40,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:40,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:40,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:40,475 INFO L124 PetriNetUnfolderBase]: 1086/1843 cut-off events. [2024-06-21 18:13:40,475 INFO L125 PetriNetUnfolderBase]: For 36640/36640 co-relation queries the response was YES. [2024-06-21 18:13:40,482 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. [2024-06-21 18:13:40,488 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 144 selfloop transitions, 52 changer transitions 0/203 dead transitions. [2024-06-21 18:13:40,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 203 transitions, 2605 flow [2024-06-21 18:13:40,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:40,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:40,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 18:13:40,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6623931623931624 [2024-06-21 18:13:40,489 INFO L175 Difference]: Start difference. First operand has 138 places, 175 transitions, 2051 flow. Second operand 6 states and 155 transitions. [2024-06-21 18:13:40,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 203 transitions, 2605 flow [2024-06-21 18:13:40,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 203 transitions, 2512 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:40,568 INFO L231 Difference]: Finished difference. Result has 140 places, 177 transitions, 2165 flow [2024-06-21 18:13:40,568 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} [2024-06-21 18:13:40,569 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 100 predicate places. [2024-06-21 18:13:40,569 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 177 transitions, 2165 flow [2024-06-21 18:13:40,569 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) [2024-06-21 18:13:40,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:40,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:40,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 18:13:40,570 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:40,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:40,570 INFO L85 PathProgramCache]: Analyzing trace with hash -740496853, now seen corresponding path program 6 times [2024-06-21 18:13:40,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:40,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618791833] [2024-06-21 18:13:40,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:40,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:40,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:40,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618791833] [2024-06-21 18:13:40,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618791833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:40,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:40,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:40,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506252114] [2024-06-21 18:13:40,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:40,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:40,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:40,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:40,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:40,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:40,689 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) [2024-06-21 18:13:40,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:40,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:40,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:40,932 INFO L124 PetriNetUnfolderBase]: 1080/1837 cut-off events. [2024-06-21 18:13:40,932 INFO L125 PetriNetUnfolderBase]: For 36449/36449 co-relation queries the response was YES. [2024-06-21 18:13:40,940 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. [2024-06-21 18:13:40,947 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 111 selfloop transitions, 90 changer transitions 0/208 dead transitions. [2024-06-21 18:13:40,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 208 transitions, 2699 flow [2024-06-21 18:13:40,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:40,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:40,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 18:13:40,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2024-06-21 18:13:40,948 INFO L175 Difference]: Start difference. First operand has 140 places, 177 transitions, 2165 flow. Second operand 8 states and 196 transitions. [2024-06-21 18:13:40,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 208 transitions, 2699 flow [2024-06-21 18:13:41,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 208 transitions, 2590 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:41,030 INFO L231 Difference]: Finished difference. Result has 143 places, 177 transitions, 2248 flow [2024-06-21 18:13:41,030 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} [2024-06-21 18:13:41,030 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 103 predicate places. [2024-06-21 18:13:41,030 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 177 transitions, 2248 flow [2024-06-21 18:13:41,031 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) [2024-06-21 18:13:41,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:41,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:41,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 18:13:41,031 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)] === [2024-06-21 18:13:41,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:41,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1766300269, now seen corresponding path program 1 times [2024-06-21 18:13:41,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:41,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797516514] [2024-06-21 18:13:41,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:41,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:41,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:41,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797516514] [2024-06-21 18:13:41,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797516514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:41,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:41,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:41,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130057916] [2024-06-21 18:13:41,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:41,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:41,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:41,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:41,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:41,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-21 18:13:41,146 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) [2024-06-21 18:13:41,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:41,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-21 18:13:41,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:41,355 INFO L124 PetriNetUnfolderBase]: 1063/1852 cut-off events. [2024-06-21 18:13:41,355 INFO L125 PetriNetUnfolderBase]: For 38281/38313 co-relation queries the response was YES. [2024-06-21 18:13:41,362 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. [2024-06-21 18:13:41,367 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 155 selfloop transitions, 24 changer transitions 0/203 dead transitions. [2024-06-21 18:13:41,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 203 transitions, 2762 flow [2024-06-21 18:13:41,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:41,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:41,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 18:13:41,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6239316239316239 [2024-06-21 18:13:41,368 INFO L175 Difference]: Start difference. First operand has 143 places, 177 transitions, 2248 flow. Second operand 6 states and 146 transitions. [2024-06-21 18:13:41,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 203 transitions, 2762 flow [2024-06-21 18:13:41,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 203 transitions, 2601 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:41,446 INFO L231 Difference]: Finished difference. Result has 143 places, 179 transitions, 2163 flow [2024-06-21 18:13:41,446 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} [2024-06-21 18:13:41,446 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 103 predicate places. [2024-06-21 18:13:41,446 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 179 transitions, 2163 flow [2024-06-21 18:13:41,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:41,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:41,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:41,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 18:13:41,447 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)] === [2024-06-21 18:13:41,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:41,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1769157229, now seen corresponding path program 2 times [2024-06-21 18:13:41,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:41,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659102381] [2024-06-21 18:13:41,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:41,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:41,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:41,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659102381] [2024-06-21 18:13:41,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659102381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:41,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:41,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:41,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631576081] [2024-06-21 18:13:41,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:41,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:41,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:41,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:41,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:41,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-21 18:13:41,559 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) [2024-06-21 18:13:41,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:41,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-21 18:13:41,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:41,762 INFO L124 PetriNetUnfolderBase]: 1099/1908 cut-off events. [2024-06-21 18:13:41,763 INFO L125 PetriNetUnfolderBase]: For 39958/39982 co-relation queries the response was YES. [2024-06-21 18:13:41,769 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. [2024-06-21 18:13:41,775 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 151 selfloop transitions, 22 changer transitions 0/197 dead transitions. [2024-06-21 18:13:41,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 197 transitions, 2577 flow [2024-06-21 18:13:41,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:41,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:41,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 18:13:41,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982905982905983 [2024-06-21 18:13:41,777 INFO L175 Difference]: Start difference. First operand has 143 places, 179 transitions, 2163 flow. Second operand 6 states and 140 transitions. [2024-06-21 18:13:41,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 197 transitions, 2577 flow [2024-06-21 18:13:41,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 197 transitions, 2546 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:41,834 INFO L231 Difference]: Finished difference. Result has 147 places, 180 transitions, 2196 flow [2024-06-21 18:13:41,835 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} [2024-06-21 18:13:41,835 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 107 predicate places. [2024-06-21 18:13:41,835 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 180 transitions, 2196 flow [2024-06-21 18:13:41,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:41,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:41,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:41,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 18:13:41,835 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)] === [2024-06-21 18:13:41,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:41,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1538234609, now seen corresponding path program 3 times [2024-06-21 18:13:41,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:41,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51286280] [2024-06-21 18:13:41,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:41,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:41,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:41,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51286280] [2024-06-21 18:13:41,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51286280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:41,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:41,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:41,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546374824] [2024-06-21 18:13:41,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:41,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:41,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:41,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:41,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:41,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-21 18:13:41,961 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) [2024-06-21 18:13:41,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:41,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-21 18:13:41,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:42,178 INFO L124 PetriNetUnfolderBase]: 1078/1877 cut-off events. [2024-06-21 18:13:42,178 INFO L125 PetriNetUnfolderBase]: For 38734/38758 co-relation queries the response was YES. [2024-06-21 18:13:42,184 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. [2024-06-21 18:13:42,189 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 156 selfloop transitions, 19 changer transitions 0/199 dead transitions. [2024-06-21 18:13:42,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 199 transitions, 2608 flow [2024-06-21 18:13:42,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:42,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:42,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-21 18:13:42,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-21 18:13:42,190 INFO L175 Difference]: Start difference. First operand has 147 places, 180 transitions, 2196 flow. Second operand 5 states and 125 transitions. [2024-06-21 18:13:42,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 199 transitions, 2608 flow [2024-06-21 18:13:42,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 199 transitions, 2562 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:42,261 INFO L231 Difference]: Finished difference. Result has 148 places, 180 transitions, 2197 flow [2024-06-21 18:13:42,261 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} [2024-06-21 18:13:42,262 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 108 predicate places. [2024-06-21 18:13:42,262 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 180 transitions, 2197 flow [2024-06-21 18:13:42,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:42,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:42,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:42,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 18:13:42,262 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)] === [2024-06-21 18:13:42,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:42,262 INFO L85 PathProgramCache]: Analyzing trace with hash -700062251, now seen corresponding path program 1 times [2024-06-21 18:13:42,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:42,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546372656] [2024-06-21 18:13:42,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:42,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:42,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:42,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546372656] [2024-06-21 18:13:42,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546372656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:42,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:42,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:42,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292441623] [2024-06-21 18:13:42,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:42,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:42,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:42,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:42,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:42,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:42,375 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) [2024-06-21 18:13:42,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:42,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:42,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:42,589 INFO L124 PetriNetUnfolderBase]: 1151/1952 cut-off events. [2024-06-21 18:13:42,589 INFO L125 PetriNetUnfolderBase]: For 41616/41616 co-relation queries the response was YES. [2024-06-21 18:13:42,597 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. [2024-06-21 18:13:42,603 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 132 selfloop transitions, 65 changer transitions 0/204 dead transitions. [2024-06-21 18:13:42,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 204 transitions, 2711 flow [2024-06-21 18:13:42,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:42,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:42,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 18:13:42,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6117216117216118 [2024-06-21 18:13:42,603 INFO L175 Difference]: Start difference. First operand has 148 places, 180 transitions, 2197 flow. Second operand 7 states and 167 transitions. [2024-06-21 18:13:42,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 204 transitions, 2711 flow [2024-06-21 18:13:42,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 204 transitions, 2667 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:42,691 INFO L231 Difference]: Finished difference. Result has 151 places, 180 transitions, 2289 flow [2024-06-21 18:13:42,691 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} [2024-06-21 18:13:42,692 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 111 predicate places. [2024-06-21 18:13:42,692 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 180 transitions, 2289 flow [2024-06-21 18:13:42,692 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) [2024-06-21 18:13:42,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:42,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:42,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 18:13:42,692 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)] === [2024-06-21 18:13:42,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:42,693 INFO L85 PathProgramCache]: Analyzing trace with hash -707683787, now seen corresponding path program 1 times [2024-06-21 18:13:42,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:42,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84763116] [2024-06-21 18:13:42,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:42,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:42,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:42,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84763116] [2024-06-21 18:13:42,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84763116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:42,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:42,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:42,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886140930] [2024-06-21 18:13:42,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:42,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:42,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:42,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:42,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:42,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:42,807 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) [2024-06-21 18:13:42,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:42,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:42,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:43,055 INFO L124 PetriNetUnfolderBase]: 1233/2076 cut-off events. [2024-06-21 18:13:43,056 INFO L125 PetriNetUnfolderBase]: For 52367/52367 co-relation queries the response was YES. [2024-06-21 18:13:43,064 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. [2024-06-21 18:13:43,070 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 143 selfloop transitions, 70 changer transitions 0/220 dead transitions. [2024-06-21 18:13:43,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 220 transitions, 2997 flow [2024-06-21 18:13:43,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:43,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:43,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 18:13:43,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6483516483516484 [2024-06-21 18:13:43,071 INFO L175 Difference]: Start difference. First operand has 151 places, 180 transitions, 2289 flow. Second operand 7 states and 177 transitions. [2024-06-21 18:13:43,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 220 transitions, 2997 flow [2024-06-21 18:13:43,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 220 transitions, 2813 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:43,152 INFO L231 Difference]: Finished difference. Result has 151 places, 184 transitions, 2298 flow [2024-06-21 18:13:43,153 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} [2024-06-21 18:13:43,153 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 111 predicate places. [2024-06-21 18:13:43,153 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 184 transitions, 2298 flow [2024-06-21 18:13:43,153 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) [2024-06-21 18:13:43,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:43,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:43,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 18:13:43,153 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)] === [2024-06-21 18:13:43,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:43,154 INFO L85 PathProgramCache]: Analyzing trace with hash -700065227, now seen corresponding path program 2 times [2024-06-21 18:13:43,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:43,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17880593] [2024-06-21 18:13:43,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:43,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:43,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:43,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17880593] [2024-06-21 18:13:43,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17880593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:43,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:43,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:43,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265556438] [2024-06-21 18:13:43,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:43,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:43,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:43,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:43,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:43,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:43,264 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) [2024-06-21 18:13:43,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:43,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:43,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:43,535 INFO L124 PetriNetUnfolderBase]: 1269/2131 cut-off events. [2024-06-21 18:13:43,535 INFO L125 PetriNetUnfolderBase]: For 55632/55632 co-relation queries the response was YES. [2024-06-21 18:13:43,543 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. [2024-06-21 18:13:43,550 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 140 selfloop transitions, 67 changer transitions 0/214 dead transitions. [2024-06-21 18:13:43,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 214 transitions, 2884 flow [2024-06-21 18:13:43,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:43,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:43,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 18:13:43,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6227106227106227 [2024-06-21 18:13:43,552 INFO L175 Difference]: Start difference. First operand has 151 places, 184 transitions, 2298 flow. Second operand 7 states and 170 transitions. [2024-06-21 18:13:43,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 214 transitions, 2884 flow [2024-06-21 18:13:43,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 214 transitions, 2784 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:43,648 INFO L231 Difference]: Finished difference. Result has 155 places, 186 transitions, 2368 flow [2024-06-21 18:13:43,648 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} [2024-06-21 18:13:43,648 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 115 predicate places. [2024-06-21 18:13:43,648 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 186 transitions, 2368 flow [2024-06-21 18:13:43,649 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) [2024-06-21 18:13:43,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:43,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:43,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 18:13:43,649 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:43,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:43,649 INFO L85 PathProgramCache]: Analyzing trace with hash -589263911, now seen corresponding path program 2 times [2024-06-21 18:13:43,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:43,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317844700] [2024-06-21 18:13:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:43,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:43,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:43,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317844700] [2024-06-21 18:13:43,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317844700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:43,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:43,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:43,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517509954] [2024-06-21 18:13:43,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:43,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:43,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:43,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:43,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:43,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:43,780 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) [2024-06-21 18:13:43,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:43,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:43,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:44,011 INFO L124 PetriNetUnfolderBase]: 1274/2139 cut-off events. [2024-06-21 18:13:44,011 INFO L125 PetriNetUnfolderBase]: For 53565/53565 co-relation queries the response was YES. [2024-06-21 18:13:44,018 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. [2024-06-21 18:13:44,025 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 139 selfloop transitions, 64 changer transitions 0/210 dead transitions. [2024-06-21 18:13:44,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 210 transitions, 2927 flow [2024-06-21 18:13:44,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:44,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:44,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 18:13:44,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007326007326007 [2024-06-21 18:13:44,026 INFO L175 Difference]: Start difference. First operand has 155 places, 186 transitions, 2368 flow. Second operand 7 states and 164 transitions. [2024-06-21 18:13:44,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 210 transitions, 2927 flow [2024-06-21 18:13:44,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 210 transitions, 2781 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:44,089 INFO L231 Difference]: Finished difference. Result has 157 places, 189 transitions, 2391 flow [2024-06-21 18:13:44,090 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} [2024-06-21 18:13:44,090 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 117 predicate places. [2024-06-21 18:13:44,090 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 189 transitions, 2391 flow [2024-06-21 18:13:44,090 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) [2024-06-21 18:13:44,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:44,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:44,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 18:13:44,091 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:44,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:44,091 INFO L85 PathProgramCache]: Analyzing trace with hash 259614678, now seen corresponding path program 1 times [2024-06-21 18:13:44,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:44,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652993595] [2024-06-21 18:13:44,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:44,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:44,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:44,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652993595] [2024-06-21 18:13:44,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652993595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:44,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:44,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:44,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337500256] [2024-06-21 18:13:44,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:44,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:44,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:44,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:44,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:44,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:44,214 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) [2024-06-21 18:13:44,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:44,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:44,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:44,451 INFO L124 PetriNetUnfolderBase]: 1300/2183 cut-off events. [2024-06-21 18:13:44,451 INFO L125 PetriNetUnfolderBase]: For 58198/58198 co-relation queries the response was YES. [2024-06-21 18:13:44,458 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. [2024-06-21 18:13:44,465 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 102 selfloop transitions, 114 changer transitions 0/223 dead transitions. [2024-06-21 18:13:44,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 223 transitions, 3191 flow [2024-06-21 18:13:44,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:44,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 18:13:44,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 18:13:44,466 INFO L175 Difference]: Start difference. First operand has 157 places, 189 transitions, 2391 flow. Second operand 7 states and 169 transitions. [2024-06-21 18:13:44,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 223 transitions, 3191 flow [2024-06-21 18:13:44,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 223 transitions, 3095 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:44,554 INFO L231 Difference]: Finished difference. Result has 161 places, 201 transitions, 2757 flow [2024-06-21 18:13:44,555 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} [2024-06-21 18:13:44,555 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 121 predicate places. [2024-06-21 18:13:44,555 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 201 transitions, 2757 flow [2024-06-21 18:13:44,555 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) [2024-06-21 18:13:44,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:44,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:44,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 18:13:44,556 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)] === [2024-06-21 18:13:44,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:44,556 INFO L85 PathProgramCache]: Analyzing trace with hash -441446580, now seen corresponding path program 2 times [2024-06-21 18:13:44,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:44,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113392149] [2024-06-21 18:13:44,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:44,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:44,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:44,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113392149] [2024-06-21 18:13:44,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113392149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:44,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:44,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:44,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739974713] [2024-06-21 18:13:44,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:44,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:44,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:44,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:44,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:44,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:44,654 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) [2024-06-21 18:13:44,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:44,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:44,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:44,905 INFO L124 PetriNetUnfolderBase]: 1310/2208 cut-off events. [2024-06-21 18:13:44,905 INFO L125 PetriNetUnfolderBase]: For 62401/62401 co-relation queries the response was YES. [2024-06-21 18:13:44,913 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. [2024-06-21 18:13:44,921 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 172 selfloop transitions, 46 changer transitions 0/225 dead transitions. [2024-06-21 18:13:44,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 225 transitions, 3386 flow [2024-06-21 18:13:44,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:44,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:44,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-21 18:13:44,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-21 18:13:44,922 INFO L175 Difference]: Start difference. First operand has 161 places, 201 transitions, 2757 flow. Second operand 9 states and 198 transitions. [2024-06-21 18:13:44,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 225 transitions, 3386 flow [2024-06-21 18:13:45,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 225 transitions, 3237 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:45,029 INFO L231 Difference]: Finished difference. Result has 167 places, 205 transitions, 2786 flow [2024-06-21 18:13:45,029 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} [2024-06-21 18:13:45,029 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 127 predicate places. [2024-06-21 18:13:45,029 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 205 transitions, 2786 flow [2024-06-21 18:13:45,030 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) [2024-06-21 18:13:45,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:45,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:45,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 18:13:45,030 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)] === [2024-06-21 18:13:45,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:45,030 INFO L85 PathProgramCache]: Analyzing trace with hash -441653970, now seen corresponding path program 3 times [2024-06-21 18:13:45,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:45,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552215941] [2024-06-21 18:13:45,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:45,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:45,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:45,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552215941] [2024-06-21 18:13:45,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552215941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:45,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:45,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:45,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387785506] [2024-06-21 18:13:45,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:45,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:45,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:45,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:45,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:45,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:45,150 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) [2024-06-21 18:13:45,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:45,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:45,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:45,411 INFO L124 PetriNetUnfolderBase]: 1302/2196 cut-off events. [2024-06-21 18:13:45,411 INFO L125 PetriNetUnfolderBase]: For 64001/64001 co-relation queries the response was YES. [2024-06-21 18:13:45,419 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. [2024-06-21 18:13:45,426 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 169 selfloop transitions, 47 changer transitions 0/223 dead transitions. [2024-06-21 18:13:45,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 223 transitions, 3262 flow [2024-06-21 18:13:45,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:45,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:45,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 18:13:45,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-21 18:13:45,427 INFO L175 Difference]: Start difference. First operand has 167 places, 205 transitions, 2786 flow. Second operand 8 states and 180 transitions. [2024-06-21 18:13:45,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 223 transitions, 3262 flow [2024-06-21 18:13:45,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 223 transitions, 3172 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:45,542 INFO L231 Difference]: Finished difference. Result has 169 places, 205 transitions, 2797 flow [2024-06-21 18:13:45,542 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} [2024-06-21 18:13:45,542 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 129 predicate places. [2024-06-21 18:13:45,542 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 205 transitions, 2797 flow [2024-06-21 18:13:45,542 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) [2024-06-21 18:13:45,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:45,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:45,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 18:13:45,543 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)] === [2024-06-21 18:13:45,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:45,543 INFO L85 PathProgramCache]: Analyzing trace with hash -441777257, now seen corresponding path program 3 times [2024-06-21 18:13:45,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:45,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384483689] [2024-06-21 18:13:45,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:45,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:45,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:45,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384483689] [2024-06-21 18:13:45,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384483689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:45,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:45,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:45,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641054370] [2024-06-21 18:13:45,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:45,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:45,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:45,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:45,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:45,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:45,672 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) [2024-06-21 18:13:45,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:45,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:45,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:45,946 INFO L124 PetriNetUnfolderBase]: 1338/2252 cut-off events. [2024-06-21 18:13:45,947 INFO L125 PetriNetUnfolderBase]: For 72798/72798 co-relation queries the response was YES. [2024-06-21 18:13:45,956 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. [2024-06-21 18:13:45,964 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 197 selfloop transitions, 25 changer transitions 0/229 dead transitions. [2024-06-21 18:13:45,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 229 transitions, 3335 flow [2024-06-21 18:13:45,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:45,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-21 18:13:45,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673076923076923 [2024-06-21 18:13:45,965 INFO L175 Difference]: Start difference. First operand has 169 places, 205 transitions, 2797 flow. Second operand 8 states and 177 transitions. [2024-06-21 18:13:45,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 229 transitions, 3335 flow [2024-06-21 18:13:46,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 229 transitions, 3198 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:46,066 INFO L231 Difference]: Finished difference. Result has 168 places, 207 transitions, 2748 flow [2024-06-21 18:13:46,067 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} [2024-06-21 18:13:46,067 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 128 predicate places. [2024-06-21 18:13:46,067 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 207 transitions, 2748 flow [2024-06-21 18:13:46,067 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) [2024-06-21 18:13:46,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:46,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:46,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 18:13:46,067 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)] === [2024-06-21 18:13:46,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:46,068 INFO L85 PathProgramCache]: Analyzing trace with hash 407439604, now seen corresponding path program 1 times [2024-06-21 18:13:46,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:46,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649825313] [2024-06-21 18:13:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:46,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:46,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:46,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649825313] [2024-06-21 18:13:46,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649825313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:46,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:46,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:46,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322578327] [2024-06-21 18:13:46,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:46,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:46,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:46,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:46,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:46,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:46,212 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) [2024-06-21 18:13:46,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:46,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:46,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:46,469 INFO L124 PetriNetUnfolderBase]: 1346/2264 cut-off events. [2024-06-21 18:13:46,469 INFO L125 PetriNetUnfolderBase]: For 70227/70227 co-relation queries the response was YES. [2024-06-21 18:13:46,479 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. [2024-06-21 18:13:46,486 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 193 selfloop transitions, 27 changer transitions 0/227 dead transitions. [2024-06-21 18:13:46,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 227 transitions, 3266 flow [2024-06-21 18:13:46,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:46,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:46,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-21 18:13:46,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 18:13:46,488 INFO L175 Difference]: Start difference. First operand has 168 places, 207 transitions, 2748 flow. Second operand 7 states and 156 transitions. [2024-06-21 18:13:46,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 227 transitions, 3266 flow [2024-06-21 18:13:46,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 227 transitions, 3206 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:46,625 INFO L231 Difference]: Finished difference. Result has 169 places, 209 transitions, 2785 flow [2024-06-21 18:13:46,626 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} [2024-06-21 18:13:46,626 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 129 predicate places. [2024-06-21 18:13:46,626 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 209 transitions, 2785 flow [2024-06-21 18:13:46,626 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) [2024-06-21 18:13:46,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:46,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:46,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 18:13:46,627 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)] === [2024-06-21 18:13:46,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:46,627 INFO L85 PathProgramCache]: Analyzing trace with hash -2085848492, now seen corresponding path program 4 times [2024-06-21 18:13:46,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:46,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729149053] [2024-06-21 18:13:46,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:46,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:46,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:46,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729149053] [2024-06-21 18:13:46,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729149053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:46,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:46,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:46,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230885913] [2024-06-21 18:13:46,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:46,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:46,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:46,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:46,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:46,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:46,730 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) [2024-06-21 18:13:46,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:46,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:46,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:46,978 INFO L124 PetriNetUnfolderBase]: 1351/2266 cut-off events. [2024-06-21 18:13:46,978 INFO L125 PetriNetUnfolderBase]: For 74668/74672 co-relation queries the response was YES. [2024-06-21 18:13:46,988 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. [2024-06-21 18:13:46,996 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 97 selfloop transitions, 128 changer transitions 0/232 dead transitions. [2024-06-21 18:13:46,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 232 transitions, 3570 flow [2024-06-21 18:13:46,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:46,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:46,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 18:13:46,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608058608058608 [2024-06-21 18:13:46,997 INFO L175 Difference]: Start difference. First operand has 169 places, 209 transitions, 2785 flow. Second operand 7 states and 166 transitions. [2024-06-21 18:13:46,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 232 transitions, 3570 flow [2024-06-21 18:13:47,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 232 transitions, 3489 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:47,120 INFO L231 Difference]: Finished difference. Result has 171 places, 212 transitions, 3019 flow [2024-06-21 18:13:47,121 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} [2024-06-21 18:13:47,121 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 131 predicate places. [2024-06-21 18:13:47,121 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 212 transitions, 3019 flow [2024-06-21 18:13:47,121 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) [2024-06-21 18:13:47,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:47,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:47,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 18:13:47,121 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:47,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:47,122 INFO L85 PathProgramCache]: Analyzing trace with hash -363007865, now seen corresponding path program 3 times [2024-06-21 18:13:47,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:47,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952276938] [2024-06-21 18:13:47,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:47,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:47,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:47,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952276938] [2024-06-21 18:13:47,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952276938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:47,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:47,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:47,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030626547] [2024-06-21 18:13:47,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:47,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:47,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:47,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:47,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:47,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:47,261 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) [2024-06-21 18:13:47,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:47,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:47,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:47,520 INFO L124 PetriNetUnfolderBase]: 1356/2276 cut-off events. [2024-06-21 18:13:47,520 INFO L125 PetriNetUnfolderBase]: For 79072/79076 co-relation queries the response was YES. [2024-06-21 18:13:47,528 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. [2024-06-21 18:13:47,535 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 155 selfloop transitions, 71 changer transitions 0/233 dead transitions. [2024-06-21 18:13:47,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 233 transitions, 3633 flow [2024-06-21 18:13:47,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:47,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-21 18:13:47,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-21 18:13:47,536 INFO L175 Difference]: Start difference. First operand has 171 places, 212 transitions, 3019 flow. Second operand 7 states and 161 transitions. [2024-06-21 18:13:47,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 233 transitions, 3633 flow [2024-06-21 18:13:47,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 233 transitions, 3128 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:47,675 INFO L231 Difference]: Finished difference. Result has 171 places, 215 transitions, 2700 flow [2024-06-21 18:13:47,676 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} [2024-06-21 18:13:47,676 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 131 predicate places. [2024-06-21 18:13:47,676 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 215 transitions, 2700 flow [2024-06-21 18:13:47,676 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) [2024-06-21 18:13:47,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:47,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:47,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 18:13:47,676 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:47,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:47,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1188092025, now seen corresponding path program 4 times [2024-06-21 18:13:47,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:47,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578151030] [2024-06-21 18:13:47,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:47,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:47,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:47,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578151030] [2024-06-21 18:13:47,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578151030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:47,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:47,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:47,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905690412] [2024-06-21 18:13:47,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:47,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:47,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:47,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:47,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:47,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:47,801 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) [2024-06-21 18:13:47,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:47,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:47,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:48,051 INFO L124 PetriNetUnfolderBase]: 1353/2274 cut-off events. [2024-06-21 18:13:48,051 INFO L125 PetriNetUnfolderBase]: For 78519/78523 co-relation queries the response was YES. [2024-06-21 18:13:48,060 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. [2024-06-21 18:13:48,067 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 152 selfloop transitions, 71 changer transitions 0/230 dead transitions. [2024-06-21 18:13:48,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 230 transitions, 3182 flow [2024-06-21 18:13:48,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-21 18:13:48,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-21 18:13:48,068 INFO L175 Difference]: Start difference. First operand has 171 places, 215 transitions, 2700 flow. Second operand 8 states and 176 transitions. [2024-06-21 18:13:48,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 230 transitions, 3182 flow [2024-06-21 18:13:48,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 230 transitions, 3065 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:48,268 INFO L231 Difference]: Finished difference. Result has 175 places, 215 transitions, 2731 flow [2024-06-21 18:13:48,268 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} [2024-06-21 18:13:48,269 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 135 predicate places. [2024-06-21 18:13:48,269 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 215 transitions, 2731 flow [2024-06-21 18:13:48,269 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) [2024-06-21 18:13:48,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:48,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:48,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 18:13:48,269 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:48,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:48,269 INFO L85 PathProgramCache]: Analyzing trace with hash -980283506, now seen corresponding path program 5 times [2024-06-21 18:13:48,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:48,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230579809] [2024-06-21 18:13:48,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:48,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:48,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:48,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230579809] [2024-06-21 18:13:48,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230579809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:48,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:48,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:48,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248825602] [2024-06-21 18:13:48,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:48,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:48,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:48,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:48,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:48,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:48,379 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) [2024-06-21 18:13:48,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:48,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:48,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:48,625 INFO L124 PetriNetUnfolderBase]: 1358/2277 cut-off events. [2024-06-21 18:13:48,626 INFO L125 PetriNetUnfolderBase]: For 82526/82530 co-relation queries the response was YES. [2024-06-21 18:13:48,635 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. [2024-06-21 18:13:48,643 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 96 selfloop transitions, 132 changer transitions 0/235 dead transitions. [2024-06-21 18:13:48,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 235 transitions, 3520 flow [2024-06-21 18:13:48,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:48,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:48,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 18:13:48,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6043956043956044 [2024-06-21 18:13:48,644 INFO L175 Difference]: Start difference. First operand has 175 places, 215 transitions, 2731 flow. Second operand 7 states and 165 transitions. [2024-06-21 18:13:48,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 235 transitions, 3520 flow [2024-06-21 18:13:48,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 235 transitions, 3262 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:48,797 INFO L231 Difference]: Finished difference. Result has 173 places, 218 transitions, 2784 flow [2024-06-21 18:13:48,797 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} [2024-06-21 18:13:48,797 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 133 predicate places. [2024-06-21 18:13:48,797 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 218 transitions, 2784 flow [2024-06-21 18:13:48,797 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) [2024-06-21 18:13:48,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:48,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:48,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 18:13:48,798 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:48,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:48,798 INFO L85 PathProgramCache]: Analyzing trace with hash -980272346, now seen corresponding path program 6 times [2024-06-21 18:13:48,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:48,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424342685] [2024-06-21 18:13:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:48,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:48,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:48,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424342685] [2024-06-21 18:13:48,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424342685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:48,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:48,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:48,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064164379] [2024-06-21 18:13:48,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:48,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:48,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:48,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:48,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:48,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:48,905 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) [2024-06-21 18:13:48,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:48,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:48,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:49,188 INFO L124 PetriNetUnfolderBase]: 1355/2277 cut-off events. [2024-06-21 18:13:49,188 INFO L125 PetriNetUnfolderBase]: For 82877/82877 co-relation queries the response was YES. [2024-06-21 18:13:49,196 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. [2024-06-21 18:13:49,203 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 200 selfloop transitions, 25 changer transitions 0/232 dead transitions. [2024-06-21 18:13:49,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 232 transitions, 3268 flow [2024-06-21 18:13:49,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:49,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:49,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-21 18:13:49,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5604395604395604 [2024-06-21 18:13:49,204 INFO L175 Difference]: Start difference. First operand has 173 places, 218 transitions, 2784 flow. Second operand 7 states and 153 transitions. [2024-06-21 18:13:49,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 232 transitions, 3268 flow [2024-06-21 18:13:49,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 232 transitions, 2902 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:49,383 INFO L231 Difference]: Finished difference. Result has 174 places, 218 transitions, 2474 flow [2024-06-21 18:13:49,383 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} [2024-06-21 18:13:49,383 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 134 predicate places. [2024-06-21 18:13:49,384 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 218 transitions, 2474 flow [2024-06-21 18:13:49,384 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) [2024-06-21 18:13:49,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:49,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:49,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 18:13:49,384 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:49,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:49,384 INFO L85 PathProgramCache]: Analyzing trace with hash -241189456, now seen corresponding path program 7 times [2024-06-21 18:13:49,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:49,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511124908] [2024-06-21 18:13:49,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:49,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:49,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:49,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511124908] [2024-06-21 18:13:49,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511124908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:49,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:49,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:49,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21673369] [2024-06-21 18:13:49,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:49,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:49,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:49,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:49,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:49,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:49,504 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) [2024-06-21 18:13:49,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:49,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:49,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:49,783 INFO L124 PetriNetUnfolderBase]: 1352/2273 cut-off events. [2024-06-21 18:13:49,783 INFO L125 PetriNetUnfolderBase]: For 84061/84061 co-relation queries the response was YES. [2024-06-21 18:13:49,792 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. [2024-06-21 18:13:49,799 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 183 selfloop transitions, 55 changer transitions 0/245 dead transitions. [2024-06-21 18:13:49,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 245 transitions, 3106 flow [2024-06-21 18:13:49,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:49,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:49,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 18:13:49,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-21 18:13:49,800 INFO L175 Difference]: Start difference. First operand has 174 places, 218 transitions, 2474 flow. Second operand 7 states and 175 transitions. [2024-06-21 18:13:49,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 245 transitions, 3106 flow [2024-06-21 18:13:49,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 245 transitions, 2986 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:49,931 INFO L231 Difference]: Finished difference. Result has 173 places, 218 transitions, 2478 flow [2024-06-21 18:13:49,931 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} [2024-06-21 18:13:49,931 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 133 predicate places. [2024-06-21 18:13:49,931 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 218 transitions, 2478 flow [2024-06-21 18:13:49,931 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) [2024-06-21 18:13:49,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:49,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:49,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 18:13:49,932 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:49,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:49,932 INFO L85 PathProgramCache]: Analyzing trace with hash 568563822, now seen corresponding path program 8 times [2024-06-21 18:13:49,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:49,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451474931] [2024-06-21 18:13:49,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:49,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:49,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:49,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:49,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451474931] [2024-06-21 18:13:49,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451474931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:49,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:50,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:50,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858265333] [2024-06-21 18:13:50,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:50,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:50,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:50,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:50,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:50,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:50,037 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) [2024-06-21 18:13:50,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:50,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:50,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:50,319 INFO L124 PetriNetUnfolderBase]: 1362/2295 cut-off events. [2024-06-21 18:13:50,320 INFO L125 PetriNetUnfolderBase]: For 88590/88590 co-relation queries the response was YES. [2024-06-21 18:13:50,329 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. [2024-06-21 18:13:50,335 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 147 selfloop transitions, 100 changer transitions 0/254 dead transitions. [2024-06-21 18:13:50,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 254 transitions, 3283 flow [2024-06-21 18:13:50,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:50,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:50,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 18:13:50,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-21 18:13:50,336 INFO L175 Difference]: Start difference. First operand has 173 places, 218 transitions, 2478 flow. Second operand 8 states and 198 transitions. [2024-06-21 18:13:50,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 254 transitions, 3283 flow [2024-06-21 18:13:50,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 254 transitions, 3165 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:50,511 INFO L231 Difference]: Finished difference. Result has 176 places, 222 transitions, 2627 flow [2024-06-21 18:13:50,511 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} [2024-06-21 18:13:50,512 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 136 predicate places. [2024-06-21 18:13:50,512 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 222 transitions, 2627 flow [2024-06-21 18:13:50,512 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) [2024-06-21 18:13:50,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:50,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:50,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 18:13:50,513 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:50,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:50,513 INFO L85 PathProgramCache]: Analyzing trace with hash 568771212, now seen corresponding path program 9 times [2024-06-21 18:13:50,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:50,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133837503] [2024-06-21 18:13:50,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:50,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:50,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:50,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133837503] [2024-06-21 18:13:50,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133837503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:50,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:50,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:50,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963589659] [2024-06-21 18:13:50,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:50,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:50,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:50,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:50,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:50,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:50,613 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) [2024-06-21 18:13:50,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:50,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:50,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:50,914 INFO L124 PetriNetUnfolderBase]: 1356/2287 cut-off events. [2024-06-21 18:13:50,914 INFO L125 PetriNetUnfolderBase]: For 86746/86746 co-relation queries the response was YES. [2024-06-21 18:13:50,924 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. [2024-06-21 18:13:50,932 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 150 selfloop transitions, 95 changer transitions 0/252 dead transitions. [2024-06-21 18:13:50,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 252 transitions, 3371 flow [2024-06-21 18:13:50,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:50,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:50,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-21 18:13:50,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603988603988604 [2024-06-21 18:13:50,940 INFO L175 Difference]: Start difference. First operand has 176 places, 222 transitions, 2627 flow. Second operand 9 states and 212 transitions. [2024-06-21 18:13:50,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 252 transitions, 3371 flow [2024-06-21 18:13:51,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 252 transitions, 3252 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:51,140 INFO L231 Difference]: Finished difference. Result has 180 places, 222 transitions, 2718 flow [2024-06-21 18:13:51,141 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} [2024-06-21 18:13:51,141 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 140 predicate places. [2024-06-21 18:13:51,141 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 222 transitions, 2718 flow [2024-06-21 18:13:51,141 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) [2024-06-21 18:13:51,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:51,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:51,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 18:13:51,142 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:51,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:51,142 INFO L85 PathProgramCache]: Analyzing trace with hash 579495972, now seen corresponding path program 10 times [2024-06-21 18:13:51,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:51,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682843478] [2024-06-21 18:13:51,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:51,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:51,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:51,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682843478] [2024-06-21 18:13:51,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682843478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:51,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:51,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:51,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140414156] [2024-06-21 18:13:51,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:51,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:51,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:51,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:51,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:51,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:51,256 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) [2024-06-21 18:13:51,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:51,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:51,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:51,535 INFO L124 PetriNetUnfolderBase]: 1348/2275 cut-off events. [2024-06-21 18:13:51,535 INFO L125 PetriNetUnfolderBase]: For 85252/85252 co-relation queries the response was YES. [2024-06-21 18:13:51,545 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. [2024-06-21 18:13:51,552 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 185 selfloop transitions, 52 changer transitions 0/244 dead transitions. [2024-06-21 18:13:51,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 244 transitions, 3248 flow [2024-06-21 18:13:51,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:51,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:51,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 18:13:51,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6452991452991453 [2024-06-21 18:13:51,553 INFO L175 Difference]: Start difference. First operand has 180 places, 222 transitions, 2718 flow. Second operand 6 states and 151 transitions. [2024-06-21 18:13:51,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 244 transitions, 3248 flow [2024-06-21 18:13:51,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 244 transitions, 3038 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:51,741 INFO L231 Difference]: Finished difference. Result has 178 places, 222 transitions, 2632 flow [2024-06-21 18:13:51,741 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} [2024-06-21 18:13:51,742 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 138 predicate places. [2024-06-21 18:13:51,742 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 222 transitions, 2632 flow [2024-06-21 18:13:51,742 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) [2024-06-21 18:13:51,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:51,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:51,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 18:13:51,743 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:51,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:51,743 INFO L85 PathProgramCache]: Analyzing trace with hash -440877196, now seen corresponding path program 11 times [2024-06-21 18:13:51,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:51,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043554983] [2024-06-21 18:13:51,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:51,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:51,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:51,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043554983] [2024-06-21 18:13:51,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043554983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:51,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:51,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:51,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401694921] [2024-06-21 18:13:51,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:51,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:51,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:51,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:51,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:51,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:51,841 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) [2024-06-21 18:13:51,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:51,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:51,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:52,109 INFO L124 PetriNetUnfolderBase]: 1343/2269 cut-off events. [2024-06-21 18:13:52,109 INFO L125 PetriNetUnfolderBase]: For 83625/83631 co-relation queries the response was YES. [2024-06-21 18:13:52,119 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. [2024-06-21 18:13:52,126 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 138 selfloop transitions, 100 changer transitions 0/245 dead transitions. [2024-06-21 18:13:52,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 245 transitions, 3166 flow [2024-06-21 18:13:52,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:52,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:52,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 18:13:52,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6227106227106227 [2024-06-21 18:13:52,127 INFO L175 Difference]: Start difference. First operand has 178 places, 222 transitions, 2632 flow. Second operand 7 states and 170 transitions. [2024-06-21 18:13:52,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 245 transitions, 3166 flow [2024-06-21 18:13:52,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 245 transitions, 3052 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:52,247 INFO L231 Difference]: Finished difference. Result has 180 places, 222 transitions, 2724 flow [2024-06-21 18:13:52,247 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} [2024-06-21 18:13:52,247 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 140 predicate places. [2024-06-21 18:13:52,247 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 222 transitions, 2724 flow [2024-06-21 18:13:52,248 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) [2024-06-21 18:13:52,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:52,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:52,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 18:13:52,248 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:52,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:52,248 INFO L85 PathProgramCache]: Analyzing trace with hash -618132003, now seen corresponding path program 4 times [2024-06-21 18:13:52,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:52,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897844913] [2024-06-21 18:13:52,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:52,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:52,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:52,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897844913] [2024-06-21 18:13:52,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897844913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:52,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:52,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:52,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664010059] [2024-06-21 18:13:52,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:52,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:52,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:52,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:52,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:52,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:52,391 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) [2024-06-21 18:13:52,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:52,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:52,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:52,691 INFO L124 PetriNetUnfolderBase]: 1366/2304 cut-off events. [2024-06-21 18:13:52,691 INFO L125 PetriNetUnfolderBase]: For 94125/94125 co-relation queries the response was YES. [2024-06-21 18:13:52,701 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. [2024-06-21 18:13:52,709 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 197 selfloop transitions, 56 changer transitions 0/260 dead transitions. [2024-06-21 18:13:52,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 260 transitions, 3346 flow [2024-06-21 18:13:52,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:52,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 18:13:52,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2024-06-21 18:13:52,710 INFO L175 Difference]: Start difference. First operand has 180 places, 222 transitions, 2724 flow. Second operand 8 states and 196 transitions. [2024-06-21 18:13:52,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 260 transitions, 3346 flow [2024-06-21 18:13:52,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 260 transitions, 2947 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-21 18:13:52,875 INFO L231 Difference]: Finished difference. Result has 178 places, 223 transitions, 2463 flow [2024-06-21 18:13:52,875 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} [2024-06-21 18:13:52,876 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 138 predicate places. [2024-06-21 18:13:52,876 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 223 transitions, 2463 flow [2024-06-21 18:13:52,876 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) [2024-06-21 18:13:52,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:52,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:52,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 18:13:52,876 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:52,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:52,876 INFO L85 PathProgramCache]: Analyzing trace with hash -607068630, now seen corresponding path program 2 times [2024-06-21 18:13:52,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:52,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32374206] [2024-06-21 18:13:52,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:52,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:52,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:52,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32374206] [2024-06-21 18:13:52,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32374206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:52,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:52,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:52,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963869661] [2024-06-21 18:13:52,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:52,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:52,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:52,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:52,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:53,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:53,006 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) [2024-06-21 18:13:53,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:53,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:53,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:53,263 INFO L124 PetriNetUnfolderBase]: 1374/2316 cut-off events. [2024-06-21 18:13:53,263 INFO L125 PetriNetUnfolderBase]: For 88484/88484 co-relation queries the response was YES. [2024-06-21 18:13:53,274 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. [2024-06-21 18:13:53,281 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 213 selfloop transitions, 21 changer transitions 0/241 dead transitions. [2024-06-21 18:13:53,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 241 transitions, 3009 flow [2024-06-21 18:13:53,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:53,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-21 18:13:53,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-21 18:13:53,282 INFO L175 Difference]: Start difference. First operand has 178 places, 223 transitions, 2463 flow. Second operand 5 states and 120 transitions. [2024-06-21 18:13:53,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 241 transitions, 3009 flow [2024-06-21 18:13:53,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 241 transitions, 2893 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:53,535 INFO L231 Difference]: Finished difference. Result has 177 places, 225 transitions, 2436 flow [2024-06-21 18:13:53,535 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} [2024-06-21 18:13:53,535 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 137 predicate places. [2024-06-21 18:13:53,535 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 225 transitions, 2436 flow [2024-06-21 18:13:53,536 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) [2024-06-21 18:13:53,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:53,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:53,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 18:13:53,536 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:53,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:53,537 INFO L85 PathProgramCache]: Analyzing trace with hash -233562960, now seen corresponding path program 3 times [2024-06-21 18:13:53,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:53,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074624673] [2024-06-21 18:13:53,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:53,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:53,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:53,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:53,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:53,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074624673] [2024-06-21 18:13:53,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074624673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:53,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:53,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:53,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509524659] [2024-06-21 18:13:53,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:53,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:53,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:53,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:53,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:53,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:53,653 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) [2024-06-21 18:13:53,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:53,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:53,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:53,920 INFO L124 PetriNetUnfolderBase]: 1382/2330 cut-off events. [2024-06-21 18:13:53,921 INFO L125 PetriNetUnfolderBase]: For 88477/88477 co-relation queries the response was YES. [2024-06-21 18:13:53,932 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. [2024-06-21 18:13:53,940 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 213 selfloop transitions, 25 changer transitions 0/245 dead transitions. [2024-06-21 18:13:53,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 245 transitions, 2998 flow [2024-06-21 18:13:53,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:53,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:53,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-21 18:13:53,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.594017094017094 [2024-06-21 18:13:53,941 INFO L175 Difference]: Start difference. First operand has 177 places, 225 transitions, 2436 flow. Second operand 6 states and 139 transitions. [2024-06-21 18:13:53,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 245 transitions, 2998 flow [2024-06-21 18:13:54,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 245 transitions, 2925 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:54,139 INFO L231 Difference]: Finished difference. Result has 180 places, 227 transitions, 2464 flow [2024-06-21 18:13:54,140 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} [2024-06-21 18:13:54,140 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 140 predicate places. [2024-06-21 18:13:54,140 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 227 transitions, 2464 flow [2024-06-21 18:13:54,140 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) [2024-06-21 18:13:54,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:54,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:54,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 18:13:54,141 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:54,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:54,141 INFO L85 PathProgramCache]: Analyzing trace with hash -617793390, now seen corresponding path program 4 times [2024-06-21 18:13:54,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:54,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429989443] [2024-06-21 18:13:54,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:54,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:54,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:54,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429989443] [2024-06-21 18:13:54,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429989443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:54,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:54,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:54,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257946934] [2024-06-21 18:13:54,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:54,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:54,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:54,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:54,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:54,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:54,297 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) [2024-06-21 18:13:54,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:54,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:54,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:54,625 INFO L124 PetriNetUnfolderBase]: 1377/2323 cut-off events. [2024-06-21 18:13:54,625 INFO L125 PetriNetUnfolderBase]: For 89753/89753 co-relation queries the response was YES. [2024-06-21 18:13:54,635 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. [2024-06-21 18:13:54,642 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 210 selfloop transitions, 29 changer transitions 0/246 dead transitions. [2024-06-21 18:13:54,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 246 transitions, 3030 flow [2024-06-21 18:13:54,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:54,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:54,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-21 18:13:54,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-21 18:13:54,644 INFO L175 Difference]: Start difference. First operand has 180 places, 227 transitions, 2464 flow. Second operand 6 states and 138 transitions. [2024-06-21 18:13:54,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 246 transitions, 3030 flow [2024-06-21 18:13:54,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 246 transitions, 2945 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:54,862 INFO L231 Difference]: Finished difference. Result has 182 places, 229 transitions, 2495 flow [2024-06-21 18:13:54,862 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} [2024-06-21 18:13:54,862 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 142 predicate places. [2024-06-21 18:13:54,862 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 229 transitions, 2495 flow [2024-06-21 18:13:54,862 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) [2024-06-21 18:13:54,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:54,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:54,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 18:13:54,863 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:54,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:54,863 INFO L85 PathProgramCache]: Analyzing trace with hash -233557008, now seen corresponding path program 1 times [2024-06-21 18:13:54,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:54,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215597349] [2024-06-21 18:13:54,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:54,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:54,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:54,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215597349] [2024-06-21 18:13:54,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215597349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:54,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:54,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:54,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793643889] [2024-06-21 18:13:54,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:54,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:54,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:54,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:54,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:54,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:54,989 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) [2024-06-21 18:13:54,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:54,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:54,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:55,267 INFO L124 PetriNetUnfolderBase]: 1364/2304 cut-off events. [2024-06-21 18:13:55,268 INFO L125 PetriNetUnfolderBase]: For 90797/90797 co-relation queries the response was YES. [2024-06-21 18:13:55,278 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. [2024-06-21 18:13:55,284 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 224 selfloop transitions, 22 changer transitions 0/253 dead transitions. [2024-06-21 18:13:55,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 253 transitions, 3071 flow [2024-06-21 18:13:55,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:55,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:55,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 18:13:55,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-21 18:13:55,285 INFO L175 Difference]: Start difference. First operand has 182 places, 229 transitions, 2495 flow. Second operand 6 states and 144 transitions. [2024-06-21 18:13:55,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 253 transitions, 3071 flow [2024-06-21 18:13:55,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 253 transitions, 2975 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:55,486 INFO L231 Difference]: Finished difference. Result has 184 places, 229 transitions, 2447 flow [2024-06-21 18:13:55,486 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} [2024-06-21 18:13:55,486 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 144 predicate places. [2024-06-21 18:13:55,486 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 229 transitions, 2447 flow [2024-06-21 18:13:55,486 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) [2024-06-21 18:13:55,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:55,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:55,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 18:13:55,486 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:55,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:55,487 INFO L85 PathProgramCache]: Analyzing trace with hash 318330054, now seen corresponding path program 1 times [2024-06-21 18:13:55,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:55,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308483591] [2024-06-21 18:13:55,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:55,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:55,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:55,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308483591] [2024-06-21 18:13:55,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308483591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:55,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:55,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:55,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357880754] [2024-06-21 18:13:55,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:55,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:55,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:55,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:55,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:55,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:55,592 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) [2024-06-21 18:13:55,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:55,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:55,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:55,903 INFO L124 PetriNetUnfolderBase]: 1369/2308 cut-off events. [2024-06-21 18:13:55,904 INFO L125 PetriNetUnfolderBase]: For 84331/84331 co-relation queries the response was YES. [2024-06-21 18:13:55,913 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. [2024-06-21 18:13:55,922 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 111 selfloop transitions, 140 changer transitions 0/258 dead transitions. [2024-06-21 18:13:55,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 258 transitions, 3240 flow [2024-06-21 18:13:55,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:55,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:55,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 18:13:55,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6121794871794872 [2024-06-21 18:13:55,923 INFO L175 Difference]: Start difference. First operand has 184 places, 229 transitions, 2447 flow. Second operand 8 states and 191 transitions. [2024-06-21 18:13:55,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 258 transitions, 3240 flow [2024-06-21 18:13:56,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 258 transitions, 3176 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:56,132 INFO L231 Difference]: Finished difference. Result has 187 places, 232 transitions, 2700 flow [2024-06-21 18:13:56,132 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} [2024-06-21 18:13:56,132 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 147 predicate places. [2024-06-21 18:13:56,132 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 232 transitions, 2700 flow [2024-06-21 18:13:56,132 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) [2024-06-21 18:13:56,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:56,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:56,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 18:13:56,133 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:56,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:56,133 INFO L85 PathProgramCache]: Analyzing trace with hash 318537444, now seen corresponding path program 2 times [2024-06-21 18:13:56,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:56,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204331636] [2024-06-21 18:13:56,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:56,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:56,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:56,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204331636] [2024-06-21 18:13:56,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204331636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:56,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:56,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:56,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902596450] [2024-06-21 18:13:56,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:56,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:56,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:56,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:56,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:56,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:56,251 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) [2024-06-21 18:13:56,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:56,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:56,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:56,530 INFO L124 PetriNetUnfolderBase]: 1366/2304 cut-off events. [2024-06-21 18:13:56,531 INFO L125 PetriNetUnfolderBase]: For 86739/86739 co-relation queries the response was YES. [2024-06-21 18:13:56,540 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. [2024-06-21 18:13:56,548 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 111 selfloop transitions, 141 changer transitions 0/259 dead transitions. [2024-06-21 18:13:56,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 259 transitions, 3370 flow [2024-06-21 18:13:56,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:13:56,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:13:56,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-21 18:13:56,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-21 18:13:56,549 INFO L175 Difference]: Start difference. First operand has 187 places, 232 transitions, 2700 flow. Second operand 10 states and 225 transitions. [2024-06-21 18:13:56,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 259 transitions, 3370 flow [2024-06-21 18:13:56,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 259 transitions, 3016 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:56,759 INFO L231 Difference]: Finished difference. Result has 191 places, 232 transitions, 2636 flow [2024-06-21 18:13:56,759 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} [2024-06-21 18:13:56,759 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 151 predicate places. [2024-06-21 18:13:56,759 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 232 transitions, 2636 flow [2024-06-21 18:13:56,759 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) [2024-06-21 18:13:56,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:56,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:56,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 18:13:56,760 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:56,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:56,760 INFO L85 PathProgramCache]: Analyzing trace with hash 82062438, now seen corresponding path program 1 times [2024-06-21 18:13:56,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:56,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529480108] [2024-06-21 18:13:56,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:56,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:56,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:56,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:56,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529480108] [2024-06-21 18:13:56,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529480108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:56,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:56,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:56,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306799709] [2024-06-21 18:13:56,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:56,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:56,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:56,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:56,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:56,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:56,890 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) [2024-06-21 18:13:56,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:56,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:56,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:57,269 INFO L124 PetriNetUnfolderBase]: 1614/2744 cut-off events. [2024-06-21 18:13:57,270 INFO L125 PetriNetUnfolderBase]: For 165366/165366 co-relation queries the response was YES. [2024-06-21 18:13:57,280 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. [2024-06-21 18:13:57,287 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 119 selfloop transitions, 146 changer transitions 7/279 dead transitions. [2024-06-21 18:13:57,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 279 transitions, 3594 flow [2024-06-21 18:13:57,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:57,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:57,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 18:13:57,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2024-06-21 18:13:57,289 INFO L175 Difference]: Start difference. First operand has 191 places, 232 transitions, 2636 flow. Second operand 8 states and 204 transitions. [2024-06-21 18:13:57,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 279 transitions, 3594 flow [2024-06-21 18:13:57,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 279 transitions, 3304 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:57,530 INFO L231 Difference]: Finished difference. Result has 190 places, 233 transitions, 2674 flow [2024-06-21 18:13:57,530 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} [2024-06-21 18:13:57,531 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 150 predicate places. [2024-06-21 18:13:57,531 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 233 transitions, 2674 flow [2024-06-21 18:13:57,531 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) [2024-06-21 18:13:57,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:57,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:57,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 18:13:57,531 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:57,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:57,531 INFO L85 PathProgramCache]: Analyzing trace with hash 318237798, now seen corresponding path program 2 times [2024-06-21 18:13:57,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:57,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673840089] [2024-06-21 18:13:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:57,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:57,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:57,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:57,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673840089] [2024-06-21 18:13:57,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673840089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:57,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:57,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:57,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619130810] [2024-06-21 18:13:57,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:57,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:57,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:57,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:57,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:57,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:57,676 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) [2024-06-21 18:13:57,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:57,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:57,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:58,071 INFO L124 PetriNetUnfolderBase]: 1825/3095 cut-off events. [2024-06-21 18:13:58,071 INFO L125 PetriNetUnfolderBase]: For 219924/219924 co-relation queries the response was YES. [2024-06-21 18:13:58,086 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. [2024-06-21 18:13:58,095 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 121 selfloop transitions, 141 changer transitions 4/273 dead transitions. [2024-06-21 18:13:58,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 273 transitions, 3598 flow [2024-06-21 18:13:58,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:58,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:58,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 18:13:58,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378205128205128 [2024-06-21 18:13:58,096 INFO L175 Difference]: Start difference. First operand has 190 places, 233 transitions, 2674 flow. Second operand 8 states and 199 transitions. [2024-06-21 18:13:58,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 273 transitions, 3598 flow [2024-06-21 18:13:58,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 273 transitions, 3399 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:58,468 INFO L231 Difference]: Finished difference. Result has 194 places, 234 transitions, 2809 flow [2024-06-21 18:13:58,468 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} [2024-06-21 18:13:58,468 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 154 predicate places. [2024-06-21 18:13:58,468 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 234 transitions, 2809 flow [2024-06-21 18:13:58,468 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) [2024-06-21 18:13:58,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:58,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:58,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 18:13:58,468 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:58,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:58,469 INFO L85 PathProgramCache]: Analyzing trace with hash 318534468, now seen corresponding path program 3 times [2024-06-21 18:13:58,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:58,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428104771] [2024-06-21 18:13:58,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:58,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:58,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:58,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428104771] [2024-06-21 18:13:58,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428104771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:58,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:58,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:58,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010935673] [2024-06-21 18:13:58,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:58,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:58,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:58,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:58,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:58,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:58,588 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) [2024-06-21 18:13:58,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:58,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:58,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:58,956 INFO L124 PetriNetUnfolderBase]: 1726/2938 cut-off events. [2024-06-21 18:13:58,956 INFO L125 PetriNetUnfolderBase]: For 187533/187533 co-relation queries the response was YES. [2024-06-21 18:13:58,970 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. [2024-06-21 18:13:58,979 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 117 selfloop transitions, 136 changer transitions 5/265 dead transitions. [2024-06-21 18:13:58,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 265 transitions, 3525 flow [2024-06-21 18:13:58,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:58,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:58,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 18:13:58,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-21 18:13:58,980 INFO L175 Difference]: Start difference. First operand has 194 places, 234 transitions, 2809 flow. Second operand 8 states and 192 transitions. [2024-06-21 18:13:58,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 265 transitions, 3525 flow [2024-06-21 18:13:59,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 265 transitions, 3314 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:59,256 INFO L231 Difference]: Finished difference. Result has 198 places, 231 transitions, 2825 flow [2024-06-21 18:13:59,256 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} [2024-06-21 18:13:59,257 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 158 predicate places. [2024-06-21 18:13:59,257 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 231 transitions, 2825 flow [2024-06-21 18:13:59,257 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) [2024-06-21 18:13:59,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:59,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:59,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 18:13:59,257 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:59,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:59,257 INFO L85 PathProgramCache]: Analyzing trace with hash -544740020, now seen corresponding path program 1 times [2024-06-21 18:13:59,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:59,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238020449] [2024-06-21 18:13:59,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:59,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:59,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:59,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238020449] [2024-06-21 18:13:59,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238020449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:59,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:59,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:59,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252855571] [2024-06-21 18:13:59,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:59,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:59,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:59,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:59,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:59,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:59,373 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) [2024-06-21 18:13:59,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:59,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:59,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:59,698 INFO L124 PetriNetUnfolderBase]: 1544/2579 cut-off events. [2024-06-21 18:13:59,699 INFO L125 PetriNetUnfolderBase]: For 171181/171181 co-relation queries the response was YES. [2024-06-21 18:13:59,712 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. [2024-06-21 18:13:59,721 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 191 selfloop transitions, 69 changer transitions 0/267 dead transitions. [2024-06-21 18:13:59,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 267 transitions, 3607 flow [2024-06-21 18:13:59,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:59,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:59,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 18:13:59,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6336996336996337 [2024-06-21 18:13:59,722 INFO L175 Difference]: Start difference. First operand has 198 places, 231 transitions, 2825 flow. Second operand 7 states and 173 transitions. [2024-06-21 18:13:59,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 267 transitions, 3607 flow [2024-06-21 18:13:59,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 267 transitions, 3312 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:59,999 INFO L231 Difference]: Finished difference. Result has 198 places, 235 transitions, 2729 flow [2024-06-21 18:13:59,999 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} [2024-06-21 18:13:59,999 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 158 predicate places. [2024-06-21 18:14:00,000 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 235 transitions, 2729 flow [2024-06-21 18:14:00,000 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) [2024-06-21 18:14:00,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:00,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:00,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 18:14:00,000 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:00,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:00,000 INFO L85 PathProgramCache]: Analyzing trace with hash -541883060, now seen corresponding path program 2 times [2024-06-21 18:14:00,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:00,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803531084] [2024-06-21 18:14:00,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:00,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:00,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:00,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803531084] [2024-06-21 18:14:00,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803531084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:00,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:00,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:00,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882995445] [2024-06-21 18:14:00,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:00,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:00,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:00,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:00,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:00,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:00,125 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) [2024-06-21 18:14:00,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:00,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:00,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:00,487 INFO L124 PetriNetUnfolderBase]: 1580/2640 cut-off events. [2024-06-21 18:14:00,487 INFO L125 PetriNetUnfolderBase]: For 177333/177333 co-relation queries the response was YES. [2024-06-21 18:14:00,500 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. [2024-06-21 18:14:00,509 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 188 selfloop transitions, 66 changer transitions 0/261 dead transitions. [2024-06-21 18:14:00,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 261 transitions, 3339 flow [2024-06-21 18:14:00,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:00,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:00,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 18:14:00,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608058608058608 [2024-06-21 18:14:00,510 INFO L175 Difference]: Start difference. First operand has 198 places, 235 transitions, 2729 flow. Second operand 7 states and 166 transitions. [2024-06-21 18:14:00,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 261 transitions, 3339 flow [2024-06-21 18:14:00,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 261 transitions, 3229 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 18:14:00,812 INFO L231 Difference]: Finished difference. Result has 202 places, 237 transitions, 2791 flow [2024-06-21 18:14:00,813 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} [2024-06-21 18:14:00,813 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 162 predicate places. [2024-06-21 18:14:00,813 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 237 transitions, 2791 flow [2024-06-21 18:14:00,813 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) [2024-06-21 18:14:00,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:00,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:00,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 18:14:00,814 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:00,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:00,814 INFO L85 PathProgramCache]: Analyzing trace with hash -56548510, now seen corresponding path program 3 times [2024-06-21 18:14:00,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:00,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299247564] [2024-06-21 18:14:00,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:00,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:00,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:00,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299247564] [2024-06-21 18:14:00,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299247564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:00,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:00,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:00,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107038614] [2024-06-21 18:14:00,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:00,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:00,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:00,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:00,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:00,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:00,928 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) [2024-06-21 18:14:00,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:00,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:00,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:01,297 INFO L124 PetriNetUnfolderBase]: 1593/2662 cut-off events. [2024-06-21 18:14:01,297 INFO L125 PetriNetUnfolderBase]: For 171076/171076 co-relation queries the response was YES. [2024-06-21 18:14:01,310 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. [2024-06-21 18:14:01,319 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 127 selfloop transitions, 134 changer transitions 0/268 dead transitions. [2024-06-21 18:14:01,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 268 transitions, 3661 flow [2024-06-21 18:14:01,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:14:01,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:14:01,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-21 18:14:01,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5717948717948718 [2024-06-21 18:14:01,320 INFO L175 Difference]: Start difference. First operand has 202 places, 237 transitions, 2791 flow. Second operand 10 states and 223 transitions. [2024-06-21 18:14:01,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 268 transitions, 3661 flow [2024-06-21 18:14:01,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 268 transitions, 3519 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 18:14:01,683 INFO L231 Difference]: Finished difference. Result has 207 places, 243 transitions, 2991 flow [2024-06-21 18:14:01,684 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} [2024-06-21 18:14:01,684 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 167 predicate places. [2024-06-21 18:14:01,684 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 243 transitions, 2991 flow [2024-06-21 18:14:01,684 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) [2024-06-21 18:14:01,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:01,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:01,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 18:14:01,685 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:01,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:01,685 INFO L85 PathProgramCache]: Analyzing trace with hash -853607114, now seen corresponding path program 4 times [2024-06-21 18:14:01,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:01,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125013285] [2024-06-21 18:14:01,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:01,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:01,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:01,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:01,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125013285] [2024-06-21 18:14:01,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125013285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:01,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:01,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:01,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104506724] [2024-06-21 18:14:01,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:01,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:01,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:01,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:01,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:01,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:01,824 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) [2024-06-21 18:14:01,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:01,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:01,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:02,193 INFO L124 PetriNetUnfolderBase]: 1590/2662 cut-off events. [2024-06-21 18:14:02,194 INFO L125 PetriNetUnfolderBase]: For 175487/175487 co-relation queries the response was YES. [2024-06-21 18:14:02,207 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. [2024-06-21 18:14:02,216 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 125 selfloop transitions, 133 changer transitions 0/265 dead transitions. [2024-06-21 18:14:02,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 265 transitions, 3673 flow [2024-06-21 18:14:02,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:02,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-21 18:14:02,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993589743589743 [2024-06-21 18:14:02,217 INFO L175 Difference]: Start difference. First operand has 207 places, 243 transitions, 2991 flow. Second operand 8 states and 187 transitions. [2024-06-21 18:14:02,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 265 transitions, 3673 flow [2024-06-21 18:14:02,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 265 transitions, 3459 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:02,492 INFO L231 Difference]: Finished difference. Result has 209 places, 243 transitions, 3049 flow [2024-06-21 18:14:02,492 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} [2024-06-21 18:14:02,493 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 169 predicate places. [2024-06-21 18:14:02,493 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 243 transitions, 3049 flow [2024-06-21 18:14:02,493 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) [2024-06-21 18:14:02,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:02,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:02,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 18:14:02,493 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:02,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:02,494 INFO L85 PathProgramCache]: Analyzing trace with hash -260952756, now seen corresponding path program 3 times [2024-06-21 18:14:02,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:02,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699501301] [2024-06-21 18:14:02,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:02,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:02,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:02,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699501301] [2024-06-21 18:14:02,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699501301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:02,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:02,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:02,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794767422] [2024-06-21 18:14:02,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:02,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:02,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:02,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:02,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:02,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:02,631 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) [2024-06-21 18:14:02,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:02,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:02,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:03,017 INFO L124 PetriNetUnfolderBase]: 1626/2721 cut-off events. [2024-06-21 18:14:03,017 INFO L125 PetriNetUnfolderBase]: For 196885/196885 co-relation queries the response was YES. [2024-06-21 18:14:03,029 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. [2024-06-21 18:14:03,036 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 235 selfloop transitions, 25 changer transitions 0/267 dead transitions. [2024-06-21 18:14:03,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 267 transitions, 3663 flow [2024-06-21 18:14:03,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:03,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:03,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-21 18:14:03,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673076923076923 [2024-06-21 18:14:03,037 INFO L175 Difference]: Start difference. First operand has 209 places, 243 transitions, 3049 flow. Second operand 8 states and 177 transitions. [2024-06-21 18:14:03,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 267 transitions, 3663 flow [2024-06-21 18:14:03,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 267 transitions, 3397 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:03,496 INFO L231 Difference]: Finished difference. Result has 210 places, 245 transitions, 2871 flow [2024-06-21 18:14:03,497 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} [2024-06-21 18:14:03,497 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 170 predicate places. [2024-06-21 18:14:03,497 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 245 transitions, 2871 flow [2024-06-21 18:14:03,497 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) [2024-06-21 18:14:03,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:03,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:03,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 18:14:03,497 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:03,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:03,498 INFO L85 PathProgramCache]: Analyzing trace with hash -809894966, now seen corresponding path program 4 times [2024-06-21 18:14:03,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:03,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161570435] [2024-06-21 18:14:03,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:03,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:03,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:03,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161570435] [2024-06-21 18:14:03,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161570435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:03,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:03,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:03,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297919206] [2024-06-21 18:14:03,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:03,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:03,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:03,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:03,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:03,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:03,644 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) [2024-06-21 18:14:03,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:03,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:03,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:04,032 INFO L124 PetriNetUnfolderBase]: 1730/2893 cut-off events. [2024-06-21 18:14:04,032 INFO L125 PetriNetUnfolderBase]: For 245301/245301 co-relation queries the response was YES. [2024-06-21 18:14:04,048 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. [2024-06-21 18:14:04,056 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 214 selfloop transitions, 47 changer transitions 3/271 dead transitions. [2024-06-21 18:14:04,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 271 transitions, 3509 flow [2024-06-21 18:14:04,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:04,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:04,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-21 18:14:04,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5754985754985755 [2024-06-21 18:14:04,064 INFO L175 Difference]: Start difference. First operand has 210 places, 245 transitions, 2871 flow. Second operand 9 states and 202 transitions. [2024-06-21 18:14:04,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 271 transitions, 3509 flow [2024-06-21 18:14:04,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 271 transitions, 3445 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:04,480 INFO L231 Difference]: Finished difference. Result has 213 places, 245 transitions, 2926 flow [2024-06-21 18:14:04,480 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} [2024-06-21 18:14:04,480 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 173 predicate places. [2024-06-21 18:14:04,480 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 245 transitions, 2926 flow [2024-06-21 18:14:04,480 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) [2024-06-21 18:14:04,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:04,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:04,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 18:14:04,481 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:04,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:04,481 INFO L85 PathProgramCache]: Analyzing trace with hash -800063936, now seen corresponding path program 5 times [2024-06-21 18:14:04,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:04,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644926157] [2024-06-21 18:14:04,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:04,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:04,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:04,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:04,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644926157] [2024-06-21 18:14:04,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644926157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:04,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:04,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:04,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411709945] [2024-06-21 18:14:04,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:04,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:04,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:04,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:04,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:04,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:04,617 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) [2024-06-21 18:14:04,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:04,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:04,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:05,045 INFO L124 PetriNetUnfolderBase]: 1824/3055 cut-off events. [2024-06-21 18:14:05,045 INFO L125 PetriNetUnfolderBase]: For 255511/255511 co-relation queries the response was YES. [2024-06-21 18:14:05,060 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. [2024-06-21 18:14:05,068 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 217 selfloop transitions, 43 changer transitions 5/272 dead transitions. [2024-06-21 18:14:05,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 272 transitions, 3570 flow [2024-06-21 18:14:05,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:14:05,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:14:05,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-21 18:14:05,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615384615384615 [2024-06-21 18:14:05,069 INFO L175 Difference]: Start difference. First operand has 213 places, 245 transitions, 2926 flow. Second operand 10 states and 219 transitions. [2024-06-21 18:14:05,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 272 transitions, 3570 flow [2024-06-21 18:14:05,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 272 transitions, 3461 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:05,480 INFO L231 Difference]: Finished difference. Result has 216 places, 243 transitions, 2906 flow [2024-06-21 18:14:05,480 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} [2024-06-21 18:14:05,481 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 176 predicate places. [2024-06-21 18:14:05,481 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 243 transitions, 2906 flow [2024-06-21 18:14:05,481 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) [2024-06-21 18:14:05,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:05,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:05,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 18:14:05,481 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:05,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:05,481 INFO L85 PathProgramCache]: Analyzing trace with hash -810191636, now seen corresponding path program 6 times [2024-06-21 18:14:05,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:05,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22350278] [2024-06-21 18:14:05,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:05,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:05,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:05,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22350278] [2024-06-21 18:14:05,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22350278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:05,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:05,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:05,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092158232] [2024-06-21 18:14:05,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:05,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:05,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:05,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:05,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:05,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:05,631 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) [2024-06-21 18:14:05,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:05,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:05,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:06,057 INFO L124 PetriNetUnfolderBase]: 1827/3078 cut-off events. [2024-06-21 18:14:06,058 INFO L125 PetriNetUnfolderBase]: For 256033/256033 co-relation queries the response was YES. [2024-06-21 18:14:06,074 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. [2024-06-21 18:14:06,083 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 216 selfloop transitions, 45 changer transitions 7/275 dead transitions. [2024-06-21 18:14:06,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 275 transitions, 3590 flow [2024-06-21 18:14:06,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:06,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:06,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-21 18:14:06,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5868945868945868 [2024-06-21 18:14:06,084 INFO L175 Difference]: Start difference. First operand has 216 places, 243 transitions, 2906 flow. Second operand 9 states and 206 transitions. [2024-06-21 18:14:06,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 275 transitions, 3590 flow [2024-06-21 18:14:06,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 275 transitions, 3487 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 18:14:06,566 INFO L231 Difference]: Finished difference. Result has 217 places, 242 transitions, 2901 flow [2024-06-21 18:14:06,566 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} [2024-06-21 18:14:06,566 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 177 predicate places. [2024-06-21 18:14:06,567 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 242 transitions, 2901 flow [2024-06-21 18:14:06,567 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) [2024-06-21 18:14:06,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:06,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:06,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 18:14:06,567 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:06,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:06,568 INFO L85 PathProgramCache]: Analyzing trace with hash -799694974, now seen corresponding path program 1 times [2024-06-21 18:14:06,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:06,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068053776] [2024-06-21 18:14:06,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:06,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:06,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:06,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068053776] [2024-06-21 18:14:06,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068053776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:06,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:06,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:06,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372272390] [2024-06-21 18:14:06,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:06,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:06,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:06,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:06,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:06,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:06,703 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) [2024-06-21 18:14:06,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:06,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:06,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:07,200 INFO L124 PetriNetUnfolderBase]: 1936/3269 cut-off events. [2024-06-21 18:14:07,201 INFO L125 PetriNetUnfolderBase]: For 326766/326766 co-relation queries the response was YES. [2024-06-21 18:14:07,218 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. [2024-06-21 18:14:07,228 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 227 selfloop transitions, 43 changer transitions 0/277 dead transitions. [2024-06-21 18:14:07,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 277 transitions, 3731 flow [2024-06-21 18:14:07,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:14:07,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:14:07,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-21 18:14:07,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5692307692307692 [2024-06-21 18:14:07,229 INFO L175 Difference]: Start difference. First operand has 217 places, 242 transitions, 2901 flow. Second operand 10 states and 222 transitions. [2024-06-21 18:14:07,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 277 transitions, 3731 flow [2024-06-21 18:14:07,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 277 transitions, 3613 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:07,698 INFO L231 Difference]: Finished difference. Result has 221 places, 244 transitions, 2942 flow [2024-06-21 18:14:07,698 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} [2024-06-21 18:14:07,698 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 181 predicate places. [2024-06-21 18:14:07,698 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 244 transitions, 2942 flow [2024-06-21 18:14:07,698 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) [2024-06-21 18:14:07,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:07,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:07,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 18:14:07,699 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:07,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:07,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2134434484, now seen corresponding path program 4 times [2024-06-21 18:14:07,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:07,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080357746] [2024-06-21 18:14:07,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:07,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:07,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:07,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080357746] [2024-06-21 18:14:07,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080357746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:07,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:07,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:07,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279467779] [2024-06-21 18:14:07,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:07,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:07,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:07,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:07,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:07,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:07,815 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) [2024-06-21 18:14:07,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:07,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:07,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:08,239 INFO L124 PetriNetUnfolderBase]: 1957/3292 cut-off events. [2024-06-21 18:14:08,239 INFO L125 PetriNetUnfolderBase]: For 290785/290789 co-relation queries the response was YES. [2024-06-21 18:14:08,258 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. [2024-06-21 18:14:08,270 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 194 selfloop transitions, 70 changer transitions 0/271 dead transitions. [2024-06-21 18:14:08,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 271 transitions, 3714 flow [2024-06-21 18:14:08,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:08,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:08,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 18:14:08,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6043956043956044 [2024-06-21 18:14:08,272 INFO L175 Difference]: Start difference. First operand has 221 places, 244 transitions, 2942 flow. Second operand 7 states and 165 transitions. [2024-06-21 18:14:08,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 271 transitions, 3714 flow [2024-06-21 18:14:08,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 271 transitions, 3623 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:08,887 INFO L231 Difference]: Finished difference. Result has 221 places, 248 transitions, 3064 flow [2024-06-21 18:14:08,887 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} [2024-06-21 18:14:08,888 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 181 predicate places. [2024-06-21 18:14:08,888 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 248 transitions, 3064 flow [2024-06-21 18:14:08,888 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) [2024-06-21 18:14:08,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:08,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:08,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 18:14:08,888 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:08,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:08,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1801061228, now seen corresponding path program 5 times [2024-06-21 18:14:08,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:08,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015293897] [2024-06-21 18:14:08,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:08,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:08,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:08,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015293897] [2024-06-21 18:14:08,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015293897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:08,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:08,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:08,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64884728] [2024-06-21 18:14:08,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:08,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:08,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:08,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:08,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:08,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:08,995 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) [2024-06-21 18:14:08,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:08,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:08,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:09,414 INFO L124 PetriNetUnfolderBase]: 1965/3304 cut-off events. [2024-06-21 18:14:09,415 INFO L125 PetriNetUnfolderBase]: For 299278/299282 co-relation queries the response was YES. [2024-06-21 18:14:09,432 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. [2024-06-21 18:14:09,443 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 194 selfloop transitions, 67 changer transitions 0/268 dead transitions. [2024-06-21 18:14:09,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 268 transitions, 3666 flow [2024-06-21 18:14:09,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:09,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:09,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-21 18:14:09,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860805860805861 [2024-06-21 18:14:09,444 INFO L175 Difference]: Start difference. First operand has 221 places, 248 transitions, 3064 flow. Second operand 7 states and 160 transitions. [2024-06-21 18:14:09,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 268 transitions, 3666 flow [2024-06-21 18:14:10,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 268 transitions, 3529 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 18:14:10,233 INFO L231 Difference]: Finished difference. Result has 225 places, 250 transitions, 3106 flow [2024-06-21 18:14:10,233 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} [2024-06-21 18:14:10,234 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 185 predicate places. [2024-06-21 18:14:10,234 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 250 transitions, 3106 flow [2024-06-21 18:14:10,234 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) [2024-06-21 18:14:10,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:10,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:10,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 18:14:10,234 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:10,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:10,235 INFO L85 PathProgramCache]: Analyzing trace with hash -367455158, now seen corresponding path program 5 times [2024-06-21 18:14:10,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:10,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98628066] [2024-06-21 18:14:10,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:10,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:10,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:10,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98628066] [2024-06-21 18:14:10,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98628066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:10,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:10,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:10,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399948067] [2024-06-21 18:14:10,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:10,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:10,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:10,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:10,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:10,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:10,353 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) [2024-06-21 18:14:10,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:10,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:10,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:10,841 INFO L124 PetriNetUnfolderBase]: 1978/3325 cut-off events. [2024-06-21 18:14:10,841 INFO L125 PetriNetUnfolderBase]: For 307808/307812 co-relation queries the response was YES. [2024-06-21 18:14:10,861 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. [2024-06-21 18:14:10,873 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 128 selfloop transitions, 141 changer transitions 0/276 dead transitions. [2024-06-21 18:14:10,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 276 transitions, 4022 flow [2024-06-21 18:14:10,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:10,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:10,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 18:14:10,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592948717948718 [2024-06-21 18:14:10,874 INFO L175 Difference]: Start difference. First operand has 225 places, 250 transitions, 3106 flow. Second operand 8 states and 185 transitions. [2024-06-21 18:14:10,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 276 transitions, 4022 flow [2024-06-21 18:14:11,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 276 transitions, 3877 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 18:14:11,449 INFO L231 Difference]: Finished difference. Result has 228 places, 256 transitions, 3323 flow [2024-06-21 18:14:11,449 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} [2024-06-21 18:14:11,449 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 188 predicate places. [2024-06-21 18:14:11,449 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 256 transitions, 3323 flow [2024-06-21 18:14:11,450 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) [2024-06-21 18:14:11,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:11,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:11,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 18:14:11,450 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:11,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:11,450 INFO L85 PathProgramCache]: Analyzing trace with hash 902153710, now seen corresponding path program 6 times [2024-06-21 18:14:11,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:11,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465459467] [2024-06-21 18:14:11,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:11,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:11,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:11,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465459467] [2024-06-21 18:14:11,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465459467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:11,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:11,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:11,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459136672] [2024-06-21 18:14:11,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:11,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:11,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:11,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:11,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:11,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:11,563 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) [2024-06-21 18:14:11,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:11,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:11,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:11,995 INFO L124 PetriNetUnfolderBase]: 1986/3352 cut-off events. [2024-06-21 18:14:11,995 INFO L125 PetriNetUnfolderBase]: For 318850/318854 co-relation queries the response was YES. [2024-06-21 18:14:12,014 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. [2024-06-21 18:14:12,025 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 197 selfloop transitions, 88 changer transitions 0/292 dead transitions. [2024-06-21 18:14:12,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 292 transitions, 4341 flow [2024-06-21 18:14:12,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:12,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:12,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 18:14:12,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6227106227106227 [2024-06-21 18:14:12,026 INFO L175 Difference]: Start difference. First operand has 228 places, 256 transitions, 3323 flow. Second operand 7 states and 170 transitions. [2024-06-21 18:14:12,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 292 transitions, 4341 flow [2024-06-21 18:14:12,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 292 transitions, 4114 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 18:14:12,557 INFO L231 Difference]: Finished difference. Result has 232 places, 264 transitions, 3433 flow [2024-06-21 18:14:12,557 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} [2024-06-21 18:14:12,558 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 192 predicate places. [2024-06-21 18:14:12,558 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 264 transitions, 3433 flow [2024-06-21 18:14:12,558 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) [2024-06-21 18:14:12,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:12,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:12,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 18:14:12,558 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:12,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:12,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1801056640, now seen corresponding path program 6 times [2024-06-21 18:14:12,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:12,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89574294] [2024-06-21 18:14:12,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:12,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:12,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:12,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89574294] [2024-06-21 18:14:12,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89574294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:12,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:12,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:12,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957709075] [2024-06-21 18:14:12,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:12,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:12,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:12,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:12,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:12,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:12,680 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) [2024-06-21 18:14:12,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:12,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:12,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:13,164 INFO L124 PetriNetUnfolderBase]: 1983/3333 cut-off events. [2024-06-21 18:14:13,164 INFO L125 PetriNetUnfolderBase]: For 325954/325958 co-relation queries the response was YES. [2024-06-21 18:14:13,183 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. [2024-06-21 18:14:13,194 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 136 selfloop transitions, 142 changer transitions 0/285 dead transitions. [2024-06-21 18:14:13,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 285 transitions, 4171 flow [2024-06-21 18:14:13,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:14:13,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:14:13,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-21 18:14:13,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.558974358974359 [2024-06-21 18:14:13,195 INFO L175 Difference]: Start difference. First operand has 232 places, 264 transitions, 3433 flow. Second operand 10 states and 218 transitions. [2024-06-21 18:14:13,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 285 transitions, 4171 flow [2024-06-21 18:14:13,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 285 transitions, 4032 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-21 18:14:13,941 INFO L231 Difference]: Finished difference. Result has 240 places, 264 transitions, 3584 flow [2024-06-21 18:14:13,942 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} [2024-06-21 18:14:13,942 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 200 predicate places. [2024-06-21 18:14:13,942 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 264 transitions, 3584 flow [2024-06-21 18:14:13,942 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) [2024-06-21 18:14:13,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:13,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:13,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 18:14:13,942 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:13,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:13,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1233026196, now seen corresponding path program 7 times [2024-06-21 18:14:13,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:13,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852897239] [2024-06-21 18:14:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:13,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:14,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:14,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852897239] [2024-06-21 18:14:14,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852897239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:14,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:14,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:14,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090680861] [2024-06-21 18:14:14,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:14,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:14,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:14,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:14,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:14,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:14,052 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) [2024-06-21 18:14:14,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:14,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:14,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:14,492 INFO L124 PetriNetUnfolderBase]: 1991/3360 cut-off events. [2024-06-21 18:14:14,492 INFO L125 PetriNetUnfolderBase]: For 335954/335958 co-relation queries the response was YES. [2024-06-21 18:14:14,511 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. [2024-06-21 18:14:14,523 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 196 selfloop transitions, 91 changer transitions 0/294 dead transitions. [2024-06-21 18:14:14,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 294 transitions, 4415 flow [2024-06-21 18:14:14,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:14,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:14,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 18:14:14,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 18:14:14,524 INFO L175 Difference]: Start difference. First operand has 240 places, 264 transitions, 3584 flow. Second operand 7 states and 169 transitions. [2024-06-21 18:14:14,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 294 transitions, 4415 flow [2024-06-21 18:14:15,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 294 transitions, 4123 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 18:14:15,163 INFO L231 Difference]: Finished difference. Result has 238 places, 267 transitions, 3512 flow [2024-06-21 18:14:15,163 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} [2024-06-21 18:14:15,163 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 198 predicate places. [2024-06-21 18:14:15,163 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 267 transitions, 3512 flow [2024-06-21 18:14:15,164 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) [2024-06-21 18:14:15,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:15,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:15,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 18:14:15,164 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:15,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:15,164 INFO L85 PathProgramCache]: Analyzing trace with hash 39428216, now seen corresponding path program 8 times [2024-06-21 18:14:15,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:15,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329709595] [2024-06-21 18:14:15,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:15,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:15,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:15,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:15,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329709595] [2024-06-21 18:14:15,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329709595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:15,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:15,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:15,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100767122] [2024-06-21 18:14:15,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:15,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:15,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:15,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:15,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:15,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:15,299 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) [2024-06-21 18:14:15,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:15,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:15,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:15,731 INFO L124 PetriNetUnfolderBase]: 1999/3358 cut-off events. [2024-06-21 18:14:15,731 INFO L125 PetriNetUnfolderBase]: For 346683/346687 co-relation queries the response was YES. [2024-06-21 18:14:15,751 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. [2024-06-21 18:14:15,762 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 210 selfloop transitions, 67 changer transitions 0/284 dead transitions. [2024-06-21 18:14:15,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 284 transitions, 4138 flow [2024-06-21 18:14:15,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:15,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-21 18:14:15,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5787545787545788 [2024-06-21 18:14:15,763 INFO L175 Difference]: Start difference. First operand has 238 places, 267 transitions, 3512 flow. Second operand 7 states and 158 transitions. [2024-06-21 18:14:15,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 284 transitions, 4138 flow [2024-06-21 18:14:16,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 284 transitions, 3990 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 18:14:16,427 INFO L231 Difference]: Finished difference. Result has 242 places, 269 transitions, 3543 flow [2024-06-21 18:14:16,427 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} [2024-06-21 18:14:16,428 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 202 predicate places. [2024-06-21 18:14:16,428 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 269 transitions, 3543 flow [2024-06-21 18:14:16,428 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) [2024-06-21 18:14:16,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:16,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:16,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 18:14:16,428 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:16,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:16,429 INFO L85 PathProgramCache]: Analyzing trace with hash 585059378, now seen corresponding path program 9 times [2024-06-21 18:14:16,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:16,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828898304] [2024-06-21 18:14:16,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:16,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:16,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:16,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828898304] [2024-06-21 18:14:16,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828898304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:16,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:16,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:16,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373169787] [2024-06-21 18:14:16,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:16,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:16,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:16,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:16,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:16,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:16,537 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) [2024-06-21 18:14:16,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:16,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:16,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:16,991 INFO L124 PetriNetUnfolderBase]: 2007/3368 cut-off events. [2024-06-21 18:14:16,992 INFO L125 PetriNetUnfolderBase]: For 356224/356228 co-relation queries the response was YES. [2024-06-21 18:14:17,013 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. [2024-06-21 18:14:17,025 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 210 selfloop transitions, 74 changer transitions 0/291 dead transitions. [2024-06-21 18:14:17,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 291 transitions, 4205 flow [2024-06-21 18:14:17,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:17,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:17,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-21 18:14:17,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934065934065934 [2024-06-21 18:14:17,026 INFO L175 Difference]: Start difference. First operand has 242 places, 269 transitions, 3543 flow. Second operand 7 states and 162 transitions. [2024-06-21 18:14:17,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 291 transitions, 4205 flow [2024-06-21 18:14:17,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 291 transitions, 4056 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 18:14:17,825 INFO L231 Difference]: Finished difference. Result has 245 places, 272 transitions, 3602 flow [2024-06-21 18:14:17,825 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} [2024-06-21 18:14:17,825 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 205 predicate places. [2024-06-21 18:14:17,825 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 272 transitions, 3602 flow [2024-06-21 18:14:17,825 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) [2024-06-21 18:14:17,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:17,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:17,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 18:14:17,826 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:17,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:17,826 INFO L85 PathProgramCache]: Analyzing trace with hash 39432804, now seen corresponding path program 7 times [2024-06-21 18:14:17,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:17,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606873945] [2024-06-21 18:14:17,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:17,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:17,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:17,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606873945] [2024-06-21 18:14:17,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606873945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:17,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:17,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:17,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825986833] [2024-06-21 18:14:17,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:17,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:17,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:17,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:17,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:17,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:17,941 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) [2024-06-21 18:14:17,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:17,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:17,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:18,435 INFO L124 PetriNetUnfolderBase]: 2020/3395 cut-off events. [2024-06-21 18:14:18,436 INFO L125 PetriNetUnfolderBase]: For 366392/366396 co-relation queries the response was YES. [2024-06-21 18:14:18,457 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. [2024-06-21 18:14:18,469 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 144 selfloop transitions, 147 changer transitions 0/298 dead transitions. [2024-06-21 18:14:18,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 298 transitions, 4590 flow [2024-06-21 18:14:18,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:14:18,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:14:18,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-21 18:14:18,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547785547785548 [2024-06-21 18:14:18,471 INFO L175 Difference]: Start difference. First operand has 245 places, 272 transitions, 3602 flow. Second operand 11 states and 238 transitions. [2024-06-21 18:14:18,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 298 transitions, 4590 flow [2024-06-21 18:14:19,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 298 transitions, 4442 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 18:14:19,289 INFO L231 Difference]: Finished difference. Result has 252 places, 278 transitions, 3834 flow [2024-06-21 18:14:19,289 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} [2024-06-21 18:14:19,290 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 212 predicate places. [2024-06-21 18:14:19,290 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 278 transitions, 3834 flow [2024-06-21 18:14:19,290 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) [2024-06-21 18:14:19,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:19,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:19,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 18:14:19,290 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:19,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:19,291 INFO L85 PathProgramCache]: Analyzing trace with hash 50084390, now seen corresponding path program 8 times [2024-06-21 18:14:19,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:19,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97585905] [2024-06-21 18:14:19,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:19,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:19,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:19,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97585905] [2024-06-21 18:14:19,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97585905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:19,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:19,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:19,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549201002] [2024-06-21 18:14:19,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:19,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:19,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:19,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:19,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:19,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:19,420 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) [2024-06-21 18:14:19,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:19,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:19,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:19,942 INFO L124 PetriNetUnfolderBase]: 2017/3403 cut-off events. [2024-06-21 18:14:19,943 INFO L125 PetriNetUnfolderBase]: For 373539/373543 co-relation queries the response was YES. [2024-06-21 18:14:19,961 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. [2024-06-21 18:14:19,973 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 142 selfloop transitions, 146 changer transitions 0/295 dead transitions. [2024-06-21 18:14:19,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 295 transitions, 4592 flow [2024-06-21 18:14:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:19,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:19,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-21 18:14:19,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5726495726495726 [2024-06-21 18:14:19,974 INFO L175 Difference]: Start difference. First operand has 252 places, 278 transitions, 3834 flow. Second operand 9 states and 201 transitions. [2024-06-21 18:14:19,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 295 transitions, 4592 flow [2024-06-21 18:14:20,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 295 transitions, 3983 flow, removed 21 selfloop flow, removed 11 redundant places. [2024-06-21 18:14:20,707 INFO L231 Difference]: Finished difference. Result has 250 places, 278 transitions, 3523 flow [2024-06-21 18:14:20,708 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} [2024-06-21 18:14:20,708 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 210 predicate places. [2024-06-21 18:14:20,708 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 278 transitions, 3523 flow [2024-06-21 18:14:20,708 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) [2024-06-21 18:14:20,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:20,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:20,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 18:14:20,708 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:20,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:20,709 INFO L85 PathProgramCache]: Analyzing trace with hash 585200676, now seen corresponding path program 9 times [2024-06-21 18:14:20,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:20,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529601294] [2024-06-21 18:14:20,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:20,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:20,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:20,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529601294] [2024-06-21 18:14:20,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529601294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:20,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:20,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:20,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472733234] [2024-06-21 18:14:20,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:20,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:20,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:20,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:20,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:20,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:20,819 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) [2024-06-21 18:14:20,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:20,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:20,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:21,295 INFO L124 PetriNetUnfolderBase]: 2014/3388 cut-off events. [2024-06-21 18:14:21,295 INFO L125 PetriNetUnfolderBase]: For 378828/378828 co-relation queries the response was YES. [2024-06-21 18:14:21,317 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. [2024-06-21 18:14:21,329 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 258 selfloop transitions, 28 changer transitions 0/293 dead transitions. [2024-06-21 18:14:21,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 293 transitions, 4131 flow [2024-06-21 18:14:21,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:21,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:21,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-21 18:14:21,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5480769230769231 [2024-06-21 18:14:21,330 INFO L175 Difference]: Start difference. First operand has 250 places, 278 transitions, 3523 flow. Second operand 8 states and 171 transitions. [2024-06-21 18:14:21,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 293 transitions, 4131 flow [2024-06-21 18:14:21,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 293 transitions, 3837 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 18:14:21,922 INFO L231 Difference]: Finished difference. Result has 250 places, 278 transitions, 3291 flow [2024-06-21 18:14:21,922 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} [2024-06-21 18:14:21,923 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 210 predicate places. [2024-06-21 18:14:21,923 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 278 transitions, 3291 flow [2024-06-21 18:14:21,923 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) [2024-06-21 18:14:21,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:21,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:21,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 18:14:21,923 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:21,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:21,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1978404498, now seen corresponding path program 10 times [2024-06-21 18:14:21,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:21,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253330998] [2024-06-21 18:14:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:21,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:22,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:22,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253330998] [2024-06-21 18:14:22,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253330998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:22,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:22,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:22,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155406523] [2024-06-21 18:14:22,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:22,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:22,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:22,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:22,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:22,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:22,049 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) [2024-06-21 18:14:22,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:22,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:22,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:22,562 INFO L124 PetriNetUnfolderBase]: 2037/3428 cut-off events. [2024-06-21 18:14:22,562 INFO L125 PetriNetUnfolderBase]: For 406518/406518 co-relation queries the response was YES. [2024-06-21 18:14:22,587 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. [2024-06-21 18:14:22,598 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 259 selfloop transitions, 50 changer transitions 0/316 dead transitions. [2024-06-21 18:14:22,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 316 transitions, 4029 flow [2024-06-21 18:14:22,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:22,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:22,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 18:14:22,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314102564102564 [2024-06-21 18:14:22,599 INFO L175 Difference]: Start difference. First operand has 250 places, 278 transitions, 3291 flow. Second operand 8 states and 197 transitions. [2024-06-21 18:14:22,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 316 transitions, 4029 flow [2024-06-21 18:14:23,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 316 transitions, 3965 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:23,542 INFO L231 Difference]: Finished difference. Result has 251 places, 279 transitions, 3357 flow [2024-06-21 18:14:23,542 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} [2024-06-21 18:14:23,542 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 211 predicate places. [2024-06-21 18:14:23,543 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 279 transitions, 3357 flow [2024-06-21 18:14:23,543 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) [2024-06-21 18:14:23,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:23,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:23,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 18:14:23,543 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:23,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:23,543 INFO L85 PathProgramCache]: Analyzing trace with hash -782294674, now seen corresponding path program 11 times [2024-06-21 18:14:23,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:23,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121389563] [2024-06-21 18:14:23,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:23,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:23,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:23,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121389563] [2024-06-21 18:14:23,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121389563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:23,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:23,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:23,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122028928] [2024-06-21 18:14:23,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:23,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:23,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:23,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:23,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:23,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:23,662 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) [2024-06-21 18:14:23,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:23,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:23,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:24,144 INFO L124 PetriNetUnfolderBase]: 2032/3428 cut-off events. [2024-06-21 18:14:24,144 INFO L125 PetriNetUnfolderBase]: For 391227/391233 co-relation queries the response was YES. [2024-06-21 18:14:24,230 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. [2024-06-21 18:14:24,240 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 252 selfloop transitions, 47 changer transitions 0/306 dead transitions. [2024-06-21 18:14:24,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 306 transitions, 4023 flow [2024-06-21 18:14:24,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:24,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:24,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 18:14:24,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6227106227106227 [2024-06-21 18:14:24,241 INFO L175 Difference]: Start difference. First operand has 251 places, 279 transitions, 3357 flow. Second operand 7 states and 170 transitions. [2024-06-21 18:14:24,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 306 transitions, 4023 flow [2024-06-21 18:14:24,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 306 transitions, 3903 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:24,944 INFO L231 Difference]: Finished difference. Result has 252 places, 279 transitions, 3339 flow [2024-06-21 18:14:24,944 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} [2024-06-21 18:14:24,944 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 212 predicate places. [2024-06-21 18:14:24,944 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 279 transitions, 3339 flow [2024-06-21 18:14:24,944 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) [2024-06-21 18:14:24,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:24,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:24,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 18:14:24,945 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:24,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:24,945 INFO L85 PathProgramCache]: Analyzing trace with hash -774676114, now seen corresponding path program 12 times [2024-06-21 18:14:24,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:24,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640592711] [2024-06-21 18:14:24,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:24,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:25,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:25,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:25,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640592711] [2024-06-21 18:14:25,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640592711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:25,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:25,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:25,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196820972] [2024-06-21 18:14:25,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:25,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:25,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:25,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:25,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:25,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:25,081 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) [2024-06-21 18:14:25,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:25,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:25,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:25,574 INFO L124 PetriNetUnfolderBase]: 2027/3411 cut-off events. [2024-06-21 18:14:25,575 INFO L125 PetriNetUnfolderBase]: For 386008/386014 co-relation queries the response was YES. [2024-06-21 18:14:25,596 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. [2024-06-21 18:14:25,608 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 244 selfloop transitions, 59 changer transitions 0/310 dead transitions. [2024-06-21 18:14:25,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 310 transitions, 4035 flow [2024-06-21 18:14:25,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:25,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:25,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 18:14:25,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6373626373626373 [2024-06-21 18:14:25,609 INFO L175 Difference]: Start difference. First operand has 252 places, 279 transitions, 3339 flow. Second operand 7 states and 174 transitions. [2024-06-21 18:14:25,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 310 transitions, 4035 flow [2024-06-21 18:14:26,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 310 transitions, 3915 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:26,354 INFO L231 Difference]: Finished difference. Result has 253 places, 279 transitions, 3345 flow [2024-06-21 18:14:26,354 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} [2024-06-21 18:14:26,354 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 213 predicate places. [2024-06-21 18:14:26,354 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 279 transitions, 3345 flow [2024-06-21 18:14:26,354 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) [2024-06-21 18:14:26,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:26,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:26,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 18:14:26,355 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:26,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:26,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1981924796, now seen corresponding path program 7 times [2024-06-21 18:14:26,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:26,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113688300] [2024-06-21 18:14:26,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:26,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:26,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:26,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113688300] [2024-06-21 18:14:26,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113688300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:26,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:26,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:26,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642043302] [2024-06-21 18:14:26,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:26,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:26,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:26,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:26,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:26,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:26,475 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) [2024-06-21 18:14:26,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:26,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:26,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:27,090 INFO L124 PetriNetUnfolderBase]: 2131/3585 cut-off events. [2024-06-21 18:14:27,090 INFO L125 PetriNetUnfolderBase]: For 488907/488907 co-relation queries the response was YES. [2024-06-21 18:14:27,114 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. [2024-06-21 18:14:27,128 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 211 selfloop transitions, 96 changer transitions 3/317 dead transitions. [2024-06-21 18:14:27,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 317 transitions, 4113 flow [2024-06-21 18:14:27,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:27,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-21 18:14:27,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6182336182336182 [2024-06-21 18:14:27,129 INFO L175 Difference]: Start difference. First operand has 253 places, 279 transitions, 3345 flow. Second operand 9 states and 217 transitions. [2024-06-21 18:14:27,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 317 transitions, 4113 flow [2024-06-21 18:14:27,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 317 transitions, 3949 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:27,919 INFO L231 Difference]: Finished difference. Result has 255 places, 279 transitions, 3410 flow [2024-06-21 18:14:27,919 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} [2024-06-21 18:14:27,920 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 215 predicate places. [2024-06-21 18:14:27,920 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 279 transitions, 3410 flow [2024-06-21 18:14:27,920 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) [2024-06-21 18:14:27,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:27,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:27,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 18:14:27,920 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:27,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:27,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1982221466, now seen corresponding path program 8 times [2024-06-21 18:14:27,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:27,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537137660] [2024-06-21 18:14:27,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:27,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:27,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:27,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537137660] [2024-06-21 18:14:27,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537137660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:27,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:27,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:27,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250385876] [2024-06-21 18:14:27,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:27,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:27,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:27,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:27,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:28,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:28,041 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) [2024-06-21 18:14:28,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:28,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:28,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:28,678 INFO L124 PetriNetUnfolderBase]: 2336/3940 cut-off events. [2024-06-21 18:14:28,678 INFO L125 PetriNetUnfolderBase]: For 566643/566643 co-relation queries the response was YES. [2024-06-21 18:14:28,704 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. [2024-06-21 18:14:28,717 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 213 selfloop transitions, 101 changer transitions 6/327 dead transitions. [2024-06-21 18:14:28,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 327 transitions, 4396 flow [2024-06-21 18:14:28,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:28,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:28,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-21 18:14:28,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6438746438746439 [2024-06-21 18:14:28,718 INFO L175 Difference]: Start difference. First operand has 255 places, 279 transitions, 3410 flow. Second operand 9 states and 226 transitions. [2024-06-21 18:14:28,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 327 transitions, 4396 flow [2024-06-21 18:14:29,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 327 transitions, 4180 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:29,906 INFO L231 Difference]: Finished difference. Result has 257 places, 277 transitions, 3392 flow [2024-06-21 18:14:29,906 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} [2024-06-21 18:14:29,906 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 217 predicate places. [2024-06-21 18:14:29,906 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 277 transitions, 3392 flow [2024-06-21 18:14:29,906 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) [2024-06-21 18:14:29,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:29,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:29,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 18:14:29,907 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:29,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:29,907 INFO L85 PathProgramCache]: Analyzing trace with hash 935808092, now seen corresponding path program 9 times [2024-06-21 18:14:29,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:29,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818876335] [2024-06-21 18:14:29,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:29,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:30,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:30,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818876335] [2024-06-21 18:14:30,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818876335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:30,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:30,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:30,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384946094] [2024-06-21 18:14:30,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:30,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:30,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:30,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:30,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:30,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:30,052 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) [2024-06-21 18:14:30,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:30,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:30,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:30,650 INFO L124 PetriNetUnfolderBase]: 2264/3810 cut-off events. [2024-06-21 18:14:30,651 INFO L125 PetriNetUnfolderBase]: For 579642/579642 co-relation queries the response was YES. [2024-06-21 18:14:30,675 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. [2024-06-21 18:14:30,688 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 250 selfloop transitions, 51 changer transitions 5/313 dead transitions. [2024-06-21 18:14:30,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 313 transitions, 4150 flow [2024-06-21 18:14:30,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:30,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:30,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 18:14:30,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.663003663003663 [2024-06-21 18:14:30,689 INFO L175 Difference]: Start difference. First operand has 257 places, 277 transitions, 3392 flow. Second operand 7 states and 181 transitions. [2024-06-21 18:14:30,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 313 transitions, 4150 flow [2024-06-21 18:14:31,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 313 transitions, 3778 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 18:14:31,885 INFO L231 Difference]: Finished difference. Result has 256 places, 275 transitions, 3140 flow [2024-06-21 18:14:31,885 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} [2024-06-21 18:14:31,885 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 216 predicate places. [2024-06-21 18:14:31,885 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 275 transitions, 3140 flow [2024-06-21 18:14:31,885 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) [2024-06-21 18:14:31,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:31,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:31,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 18:14:31,886 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:31,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:31,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1972093766, now seen corresponding path program 10 times [2024-06-21 18:14:31,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:31,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492291907] [2024-06-21 18:14:31,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:31,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:31,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:31,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492291907] [2024-06-21 18:14:31,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492291907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:31,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:31,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:31,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084322598] [2024-06-21 18:14:31,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:31,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:31,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:31,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:31,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:32,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:32,000 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) [2024-06-21 18:14:32,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:32,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:32,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:32,544 INFO L124 PetriNetUnfolderBase]: 2110/3556 cut-off events. [2024-06-21 18:14:32,544 INFO L125 PetriNetUnfolderBase]: For 490155/490155 co-relation queries the response was YES. [2024-06-21 18:14:32,567 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. [2024-06-21 18:14:32,578 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 212 selfloop transitions, 85 changer transitions 6/310 dead transitions. [2024-06-21 18:14:32,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 310 transitions, 3852 flow [2024-06-21 18:14:32,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:14:32,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:14:32,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-21 18:14:32,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923076923076923 [2024-06-21 18:14:32,579 INFO L175 Difference]: Start difference. First operand has 256 places, 275 transitions, 3140 flow. Second operand 10 states and 231 transitions. [2024-06-21 18:14:32,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 310 transitions, 3852 flow [2024-06-21 18:14:33,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 310 transitions, 3720 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:33,327 INFO L231 Difference]: Finished difference. Result has 260 places, 271 transitions, 3153 flow [2024-06-21 18:14:33,328 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} [2024-06-21 18:14:33,328 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 220 predicate places. [2024-06-21 18:14:33,328 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 271 transitions, 3153 flow [2024-06-21 18:14:33,328 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) [2024-06-21 18:14:33,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:33,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:33,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 18:14:33,329 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:33,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:33,329 INFO L85 PathProgramCache]: Analyzing trace with hash 936177054, now seen corresponding path program 2 times [2024-06-21 18:14:33,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:33,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676831038] [2024-06-21 18:14:33,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:33,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:33,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:33,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:33,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676831038] [2024-06-21 18:14:33,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676831038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:33,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:33,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:33,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880074922] [2024-06-21 18:14:33,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:33,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:33,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:33,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:33,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:33,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:33,484 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) [2024-06-21 18:14:33,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:33,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:33,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:34,099 INFO L124 PetriNetUnfolderBase]: 2359/4011 cut-off events. [2024-06-21 18:14:34,099 INFO L125 PetriNetUnfolderBase]: For 625436/625436 co-relation queries the response was YES. [2024-06-21 18:14:34,125 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. [2024-06-21 18:14:34,138 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 250 selfloop transitions, 57 changer transitions 0/314 dead transitions. [2024-06-21 18:14:34,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 314 transitions, 4129 flow [2024-06-21 18:14:34,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:34,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:34,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 18:14:34,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6703296703296703 [2024-06-21 18:14:34,139 INFO L175 Difference]: Start difference. First operand has 260 places, 271 transitions, 3153 flow. Second operand 7 states and 183 transitions. [2024-06-21 18:14:34,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 314 transitions, 4129 flow [2024-06-21 18:14:35,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 314 transitions, 3925 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 18:14:35,446 INFO L231 Difference]: Finished difference. Result has 259 places, 275 transitions, 3185 flow [2024-06-21 18:14:35,446 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} [2024-06-21 18:14:35,446 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 219 predicate places. [2024-06-21 18:14:35,447 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 275 transitions, 3185 flow [2024-06-21 18:14:35,447 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) [2024-06-21 18:14:35,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:35,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:35,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 18:14:35,447 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:35,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:35,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1349483934, now seen corresponding path program 3 times [2024-06-21 18:14:35,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:35,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899864142] [2024-06-21 18:14:35,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:35,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:35,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:35,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899864142] [2024-06-21 18:14:35,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899864142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:35,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:35,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:35,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272924775] [2024-06-21 18:14:35,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:35,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:35,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:35,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:35,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:35,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:35,571 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) [2024-06-21 18:14:35,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:35,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:35,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:36,318 INFO L124 PetriNetUnfolderBase]: 2636/4520 cut-off events. [2024-06-21 18:14:36,318 INFO L125 PetriNetUnfolderBase]: For 683411/683411 co-relation queries the response was YES. [2024-06-21 18:14:36,347 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. [2024-06-21 18:14:36,361 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 253 selfloop transitions, 66 changer transitions 0/326 dead transitions. [2024-06-21 18:14:36,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 326 transitions, 4383 flow [2024-06-21 18:14:36,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:36,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-21 18:14:36,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6698717948717948 [2024-06-21 18:14:36,362 INFO L175 Difference]: Start difference. First operand has 259 places, 275 transitions, 3185 flow. Second operand 8 states and 209 transitions. [2024-06-21 18:14:36,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 326 transitions, 4383 flow [2024-06-21 18:14:38,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 326 transitions, 4289 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 18:14:38,179 INFO L231 Difference]: Finished difference. Result has 264 places, 279 transitions, 3372 flow [2024-06-21 18:14:38,179 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} [2024-06-21 18:14:38,179 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 224 predicate places. [2024-06-21 18:14:38,180 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 279 transitions, 3372 flow [2024-06-21 18:14:38,180 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) [2024-06-21 18:14:38,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:38,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:38,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 18:14:38,180 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:38,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:38,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1971724804, now seen corresponding path program 4 times [2024-06-21 18:14:38,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:38,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326710692] [2024-06-21 18:14:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:38,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:38,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:38,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:38,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326710692] [2024-06-21 18:14:38,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326710692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:38,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:38,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:38,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146186966] [2024-06-21 18:14:38,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:38,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:38,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:38,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:38,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:38,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:38,315 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) [2024-06-21 18:14:38,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:38,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:38,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:39,150 INFO L124 PetriNetUnfolderBase]: 2886/4968 cut-off events. [2024-06-21 18:14:39,150 INFO L125 PetriNetUnfolderBase]: For 755525/755525 co-relation queries the response was YES. [2024-06-21 18:14:39,178 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. [2024-06-21 18:14:39,191 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 228 selfloop transitions, 87 changer transitions 0/322 dead transitions. [2024-06-21 18:14:39,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 322 transitions, 4326 flow [2024-06-21 18:14:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:14:39,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:14:39,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-21 18:14:39,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-06-21 18:14:39,192 INFO L175 Difference]: Start difference. First operand has 264 places, 279 transitions, 3372 flow. Second operand 10 states and 235 transitions. [2024-06-21 18:14:39,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 322 transitions, 4326 flow [2024-06-21 18:14:40,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 322 transitions, 4211 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 18:14:40,359 INFO L231 Difference]: Finished difference. Result has 270 places, 280 transitions, 3501 flow [2024-06-21 18:14:40,359 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} [2024-06-21 18:14:40,359 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 230 predicate places. [2024-06-21 18:14:40,359 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 280 transitions, 3501 flow [2024-06-21 18:14:40,359 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) [2024-06-21 18:14:40,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:40,360 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] [2024-06-21 18:14:40,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 18:14:40,360 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:40,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:40,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1755798788, now seen corresponding path program 1 times [2024-06-21 18:14:40,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:40,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137686560] [2024-06-21 18:14:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:40,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:40,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:40,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137686560] [2024-06-21 18:14:40,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137686560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:40,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:40,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:40,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687252909] [2024-06-21 18:14:40,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:40,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:40,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:40,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:40,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:40,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:40,468 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) [2024-06-21 18:14:40,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:40,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:40,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:41,240 INFO L124 PetriNetUnfolderBase]: 2959/5093 cut-off events. [2024-06-21 18:14:41,240 INFO L125 PetriNetUnfolderBase]: For 718972/718972 co-relation queries the response was YES. [2024-06-21 18:14:41,276 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. [2024-06-21 18:14:41,293 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 235 selfloop transitions, 76 changer transitions 0/318 dead transitions. [2024-06-21 18:14:41,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 318 transitions, 4579 flow [2024-06-21 18:14:41,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:41,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:41,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 18:14:41,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6336996336996337 [2024-06-21 18:14:41,294 INFO L175 Difference]: Start difference. First operand has 270 places, 280 transitions, 3501 flow. Second operand 7 states and 173 transitions. [2024-06-21 18:14:41,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 318 transitions, 4579 flow [2024-06-21 18:14:42,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 318 transitions, 4328 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 18:14:42,901 INFO L231 Difference]: Finished difference. Result has 269 places, 283 transitions, 3448 flow [2024-06-21 18:14:42,901 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} [2024-06-21 18:14:42,901 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 229 predicate places. [2024-06-21 18:14:42,902 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 283 transitions, 3448 flow [2024-06-21 18:14:42,902 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) [2024-06-21 18:14:42,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:42,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:42,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 18:14:42,902 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:42,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:42,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1751037188, now seen corresponding path program 2 times [2024-06-21 18:14:42,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:42,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968745691] [2024-06-21 18:14:42,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:42,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:42,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:42,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968745691] [2024-06-21 18:14:42,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968745691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:42,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:42,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:42,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626700097] [2024-06-21 18:14:42,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:42,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:42,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:42,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:42,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:43,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:43,020 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) [2024-06-21 18:14:43,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:43,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:43,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:43,763 INFO L124 PetriNetUnfolderBase]: 2852/4931 cut-off events. [2024-06-21 18:14:43,763 INFO L125 PetriNetUnfolderBase]: For 640311/640311 co-relation queries the response was YES. [2024-06-21 18:14:43,798 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. [2024-06-21 18:14:43,814 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 240 selfloop transitions, 73 changer transitions 0/320 dead transitions. [2024-06-21 18:14:43,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 320 transitions, 4350 flow [2024-06-21 18:14:43,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:43,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:43,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 18:14:43,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-21 18:14:43,815 INFO L175 Difference]: Start difference. First operand has 269 places, 283 transitions, 3448 flow. Second operand 8 states and 192 transitions. [2024-06-21 18:14:43,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 320 transitions, 4350 flow [2024-06-21 18:14:45,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 320 transitions, 4266 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-21 18:14:45,025 INFO L231 Difference]: Finished difference. Result has 275 places, 284 transitions, 3534 flow [2024-06-21 18:14:45,025 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} [2024-06-21 18:14:45,026 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 235 predicate places. [2024-06-21 18:14:45,026 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 284 transitions, 3534 flow [2024-06-21 18:14:45,026 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) [2024-06-21 18:14:45,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:45,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:45,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 18:14:45,026 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:45,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:45,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1278288636, now seen corresponding path program 3 times [2024-06-21 18:14:45,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:45,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946951043] [2024-06-21 18:14:45,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:45,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:45,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:45,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:45,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946951043] [2024-06-21 18:14:45,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946951043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:45,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:45,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:45,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135038550] [2024-06-21 18:14:45,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:45,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:45,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:45,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:45,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:45,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:45,174 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) [2024-06-21 18:14:45,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:45,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:45,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:45,998 INFO L124 PetriNetUnfolderBase]: 2834/4913 cut-off events. [2024-06-21 18:14:45,999 INFO L125 PetriNetUnfolderBase]: For 606424/606424 co-relation queries the response was YES. [2024-06-21 18:14:46,033 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. [2024-06-21 18:14:46,048 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 242 selfloop transitions, 63 changer transitions 0/312 dead transitions. [2024-06-21 18:14:46,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 312 transitions, 4226 flow [2024-06-21 18:14:46,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:46,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:46,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 18:14:46,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592948717948718 [2024-06-21 18:14:46,051 INFO L175 Difference]: Start difference. First operand has 275 places, 284 transitions, 3534 flow. Second operand 8 states and 185 transitions. [2024-06-21 18:14:46,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 312 transitions, 4226 flow [2024-06-21 18:14:47,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 312 transitions, 4074 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:47,465 INFO L231 Difference]: Finished difference. Result has 277 places, 284 transitions, 3513 flow [2024-06-21 18:14:47,465 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} [2024-06-21 18:14:47,466 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 237 predicate places. [2024-06-21 18:14:47,466 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 284 transitions, 3513 flow [2024-06-21 18:14:47,466 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) [2024-06-21 18:14:47,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:47,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:47,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 18:14:47,466 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:47,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:47,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1547221588, now seen corresponding path program 4 times [2024-06-21 18:14:47,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:47,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245902329] [2024-06-21 18:14:47,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:47,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:47,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:47,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245902329] [2024-06-21 18:14:47,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245902329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:47,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:47,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:47,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384659987] [2024-06-21 18:14:47,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:47,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:47,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:47,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:47,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:47,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:47,595 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) [2024-06-21 18:14:47,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:47,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:47,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:48,321 INFO L124 PetriNetUnfolderBase]: 2854/4935 cut-off events. [2024-06-21 18:14:48,321 INFO L125 PetriNetUnfolderBase]: For 616908/616908 co-relation queries the response was YES. [2024-06-21 18:14:48,357 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. [2024-06-21 18:14:48,372 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 244 selfloop transitions, 66 changer transitions 0/317 dead transitions. [2024-06-21 18:14:48,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 317 transitions, 4243 flow [2024-06-21 18:14:48,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-21 18:14:48,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584045584045584 [2024-06-21 18:14:48,374 INFO L175 Difference]: Start difference. First operand has 277 places, 284 transitions, 3513 flow. Second operand 9 states and 205 transitions. [2024-06-21 18:14:48,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 317 transitions, 4243 flow [2024-06-21 18:14:49,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 317 transitions, 4097 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:49,823 INFO L231 Difference]: Finished difference. Result has 279 places, 285 transitions, 3517 flow [2024-06-21 18:14:49,823 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} [2024-06-21 18:14:49,823 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 239 predicate places. [2024-06-21 18:14:49,823 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 285 transitions, 3517 flow [2024-06-21 18:14:49,823 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) [2024-06-21 18:14:49,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:49,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:49,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 18:14:49,824 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:49,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:49,824 INFO L85 PathProgramCache]: Analyzing trace with hash 653100888, now seen corresponding path program 5 times [2024-06-21 18:14:49,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:49,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968680444] [2024-06-21 18:14:49,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:49,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:49,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:49,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968680444] [2024-06-21 18:14:49,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968680444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:49,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:49,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:49,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146114321] [2024-06-21 18:14:49,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:49,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:49,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:49,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:49,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:49,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:49,945 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) [2024-06-21 18:14:49,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:49,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:49,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:50,707 INFO L124 PetriNetUnfolderBase]: 2882/4985 cut-off events. [2024-06-21 18:14:50,707 INFO L125 PetriNetUnfolderBase]: For 637934/637934 co-relation queries the response was YES. [2024-06-21 18:14:50,747 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. [2024-06-21 18:14:50,763 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 243 selfloop transitions, 61 changer transitions 0/311 dead transitions. [2024-06-21 18:14:50,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 311 transitions, 4211 flow [2024-06-21 18:14:50,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:50,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:50,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-21 18:14:50,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 18:14:50,764 INFO L175 Difference]: Start difference. First operand has 279 places, 285 transitions, 3517 flow. Second operand 8 states and 182 transitions. [2024-06-21 18:14:50,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 311 transitions, 4211 flow [2024-06-21 18:14:52,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 311 transitions, 4075 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:52,477 INFO L231 Difference]: Finished difference. Result has 280 places, 286 transitions, 3522 flow [2024-06-21 18:14:52,477 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} [2024-06-21 18:14:52,478 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 240 predicate places. [2024-06-21 18:14:52,478 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 286 transitions, 3522 flow [2024-06-21 18:14:52,478 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) [2024-06-21 18:14:52,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:52,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:52,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 18:14:52,478 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:52,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:52,479 INFO L85 PathProgramCache]: Analyzing trace with hash 653857590, now seen corresponding path program 6 times [2024-06-21 18:14:52,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:52,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986362916] [2024-06-21 18:14:52,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:52,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:52,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:52,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:52,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986362916] [2024-06-21 18:14:52,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986362916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:52,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:52,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:52,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447321884] [2024-06-21 18:14:52,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:52,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:52,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:52,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:52,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:52,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:52,589 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) [2024-06-21 18:14:52,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:52,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:52,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:53,352 INFO L124 PetriNetUnfolderBase]: 2902/5024 cut-off events. [2024-06-21 18:14:53,352 INFO L125 PetriNetUnfolderBase]: For 646939/646939 co-relation queries the response was YES. [2024-06-21 18:14:53,388 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. [2024-06-21 18:14:53,404 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 281 selfloop transitions, 25 changer transitions 0/313 dead transitions. [2024-06-21 18:14:53,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 313 transitions, 4388 flow [2024-06-21 18:14:53,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:53,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:53,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-21 18:14:53,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5737179487179487 [2024-06-21 18:14:53,407 INFO L175 Difference]: Start difference. First operand has 280 places, 286 transitions, 3522 flow. Second operand 8 states and 179 transitions. [2024-06-21 18:14:53,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 313 transitions, 4388 flow [2024-06-21 18:14:55,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 313 transitions, 4265 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:55,239 INFO L231 Difference]: Finished difference. Result has 283 places, 287 transitions, 3476 flow [2024-06-21 18:14:55,239 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} [2024-06-21 18:14:55,240 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 243 predicate places. [2024-06-21 18:14:55,240 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 287 transitions, 3476 flow [2024-06-21 18:14:55,240 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) [2024-06-21 18:14:55,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:55,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:55,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 18:14:55,240 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:55,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:55,241 INFO L85 PathProgramCache]: Analyzing trace with hash 292660896, now seen corresponding path program 1 times [2024-06-21 18:14:55,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:55,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445733160] [2024-06-21 18:14:55,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:55,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:55,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:55,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445733160] [2024-06-21 18:14:55,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445733160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:55,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:55,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:55,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608356720] [2024-06-21 18:14:55,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:55,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:55,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:55,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:55,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:55,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:55,349 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) [2024-06-21 18:14:55,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:55,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:55,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:56,120 INFO L124 PetriNetUnfolderBase]: 2922/5033 cut-off events. [2024-06-21 18:14:56,120 INFO L125 PetriNetUnfolderBase]: For 664011/664011 co-relation queries the response was YES. [2024-06-21 18:14:56,160 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. [2024-06-21 18:14:56,176 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 230 selfloop transitions, 86 changer transitions 0/323 dead transitions. [2024-06-21 18:14:56,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 323 transitions, 4552 flow [2024-06-21 18:14:56,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:56,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:56,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 18:14:56,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6336996336996337 [2024-06-21 18:14:56,177 INFO L175 Difference]: Start difference. First operand has 283 places, 287 transitions, 3476 flow. Second operand 7 states and 173 transitions. [2024-06-21 18:14:56,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 323 transitions, 4552 flow [2024-06-21 18:14:57,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 323 transitions, 4501 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 18:14:57,637 INFO L231 Difference]: Finished difference. Result has 285 places, 288 transitions, 3617 flow [2024-06-21 18:14:57,637 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} [2024-06-21 18:14:57,637 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 245 predicate places. [2024-06-21 18:14:57,637 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 288 transitions, 3617 flow [2024-06-21 18:14:57,638 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) [2024-06-21 18:14:57,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:57,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:57,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 18:14:57,638 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:57,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:57,638 INFO L85 PathProgramCache]: Analyzing trace with hash 564719578, now seen corresponding path program 2 times [2024-06-21 18:14:57,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:57,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904857022] [2024-06-21 18:14:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:57,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:57,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:57,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904857022] [2024-06-21 18:14:57,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904857022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:57,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:57,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:57,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142107453] [2024-06-21 18:14:57,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:57,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:57,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:57,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:57,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:57,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:57,770 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) [2024-06-21 18:14:57,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:57,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:57,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:58,564 INFO L124 PetriNetUnfolderBase]: 2942/5064 cut-off events. [2024-06-21 18:14:58,564 INFO L125 PetriNetUnfolderBase]: For 683481/683481 co-relation queries the response was YES. [2024-06-21 18:14:58,602 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. [2024-06-21 18:14:58,619 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 246 selfloop transitions, 71 changer transitions 0/324 dead transitions. [2024-06-21 18:14:58,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 324 transitions, 4385 flow [2024-06-21 18:14:58,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:58,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:58,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 18:14:58,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6121794871794872 [2024-06-21 18:14:58,620 INFO L175 Difference]: Start difference. First operand has 285 places, 288 transitions, 3617 flow. Second operand 8 states and 191 transitions. [2024-06-21 18:14:58,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 324 transitions, 4385 flow [2024-06-21 18:15:00,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 324 transitions, 4157 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 18:15:00,406 INFO L231 Difference]: Finished difference. Result has 288 places, 289 transitions, 3555 flow [2024-06-21 18:15:00,406 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} [2024-06-21 18:15:00,407 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 248 predicate places. [2024-06-21 18:15:00,407 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 289 transitions, 3555 flow [2024-06-21 18:15:00,407 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) [2024-06-21 18:15:00,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:00,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:00,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 18:15:00,407 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:15:00,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:00,407 INFO L85 PathProgramCache]: Analyzing trace with hash 292930007, now seen corresponding path program 1 times [2024-06-21 18:15:00,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:00,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413895377] [2024-06-21 18:15:00,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:00,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:00,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:00,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:00,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413895377] [2024-06-21 18:15:00,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413895377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:00,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:00,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:00,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302526589] [2024-06-21 18:15:00,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:00,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:00,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:00,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:00,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:00,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:15:00,524 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) [2024-06-21 18:15:00,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:00,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:15:00,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:01,535 INFO L124 PetriNetUnfolderBase]: 3670/6295 cut-off events. [2024-06-21 18:15:01,535 INFO L125 PetriNetUnfolderBase]: For 1217244/1217244 co-relation queries the response was YES. [2024-06-21 18:15:01,583 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. [2024-06-21 18:15:01,604 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 181 selfloop transitions, 140 changer transitions 7/335 dead transitions. [2024-06-21 18:15:01,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 335 transitions, 4657 flow [2024-06-21 18:15:01,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:15:01,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:15:01,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 18:15:01,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-21 18:15:01,605 INFO L175 Difference]: Start difference. First operand has 288 places, 289 transitions, 3555 flow. Second operand 8 states and 200 transitions. [2024-06-21 18:15:01,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 335 transitions, 4657 flow [2024-06-21 18:15:03,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 335 transitions, 4511 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 18:15:03,867 INFO L231 Difference]: Finished difference. Result has 291 places, 293 transitions, 3845 flow [2024-06-21 18:15:03,867 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} [2024-06-21 18:15:03,867 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 251 predicate places. [2024-06-21 18:15:03,867 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 293 transitions, 3845 flow [2024-06-21 18:15:03,867 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) [2024-06-21 18:15:03,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:03,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:03,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 18:15:03,868 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:15:03,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:03,868 INFO L85 PathProgramCache]: Analyzing trace with hash 381495426, now seen corresponding path program 3 times [2024-06-21 18:15:03,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:03,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731249300] [2024-06-21 18:15:03,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:03,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:03,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:03,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731249300] [2024-06-21 18:15:03,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731249300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:03,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:03,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:03,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435629820] [2024-06-21 18:15:03,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:03,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:03,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:03,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:03,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:03,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:15:03,997 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) [2024-06-21 18:15:03,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:03,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:15:03,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:05,054 INFO L124 PetriNetUnfolderBase]: 3640/6277 cut-off events. [2024-06-21 18:15:05,054 INFO L125 PetriNetUnfolderBase]: For 1165957/1165957 co-relation queries the response was YES. [2024-06-21 18:15:05,098 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. [2024-06-21 18:15:05,116 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 253 selfloop transitions, 63 changer transitions 0/323 dead transitions. [2024-06-21 18:15:05,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 323 transitions, 4579 flow [2024-06-21 18:15:05,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:15:05,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:15:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-21 18:15:05,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5754985754985755 [2024-06-21 18:15:05,117 INFO L175 Difference]: Start difference. First operand has 291 places, 293 transitions, 3845 flow. Second operand 9 states and 202 transitions. [2024-06-21 18:15:05,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 323 transitions, 4579 flow [2024-06-21 18:15:08,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 323 transitions, 4309 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 18:15:08,268 INFO L231 Difference]: Finished difference. Result has 295 places, 294 transitions, 3721 flow [2024-06-21 18:15:08,268 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} [2024-06-21 18:15:08,268 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 255 predicate places. [2024-06-21 18:15:08,268 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 294 transitions, 3721 flow [2024-06-21 18:15:08,269 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) [2024-06-21 18:15:08,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:08,269 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] [2024-06-21 18:15:08,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 18:15:08,269 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:15:08,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:08,269 INFO L85 PathProgramCache]: Analyzing trace with hash 381495767, now seen corresponding path program 2 times [2024-06-21 18:15:08,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:08,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548585271] [2024-06-21 18:15:08,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:08,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:08,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:08,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548585271] [2024-06-21 18:15:08,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548585271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:08,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:08,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:08,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285754691] [2024-06-21 18:15:08,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:08,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:08,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:08,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:08,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:08,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:15:08,396 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) [2024-06-21 18:15:08,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:08,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:15:08,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:09,524 INFO L124 PetriNetUnfolderBase]: 3888/6695 cut-off events. [2024-06-21 18:15:09,524 INFO L125 PetriNetUnfolderBase]: For 1390769/1390769 co-relation queries the response was YES. [2024-06-21 18:15:09,567 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. [2024-06-21 18:15:09,585 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 187 selfloop transitions, 132 changer transitions 4/330 dead transitions. [2024-06-21 18:15:09,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 330 transitions, 4711 flow [2024-06-21 18:15:09,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:15:09,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:15:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 18:15:09,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217948717948718 [2024-06-21 18:15:09,586 INFO L175 Difference]: Start difference. First operand has 295 places, 294 transitions, 3721 flow. Second operand 8 states and 194 transitions. [2024-06-21 18:15:09,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 330 transitions, 4711 flow [2024-06-21 18:15:12,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 330 transitions, 4579 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 18:15:12,983 INFO L231 Difference]: Finished difference. Result has 296 places, 295 transitions, 3897 flow [2024-06-21 18:15:12,983 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} [2024-06-21 18:15:12,983 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 256 predicate places. [2024-06-21 18:15:12,983 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 295 transitions, 3897 flow [2024-06-21 18:15:12,983 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) [2024-06-21 18:15:12,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:12,984 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] [2024-06-21 18:15:12,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 18:15:12,984 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)] === [2024-06-21 18:15:12,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:12,984 INFO L85 PathProgramCache]: Analyzing trace with hash 381643637, now seen corresponding path program 3 times [2024-06-21 18:15:12,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:12,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914805094] [2024-06-21 18:15:12,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:12,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:13,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:13,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914805094] [2024-06-21 18:15:13,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914805094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:13,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:13,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:13,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336513030] [2024-06-21 18:15:13,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:13,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:13,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:13,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:13,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:13,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:15:13,100 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) [2024-06-21 18:15:13,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:13,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:15:13,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:14,258 INFO L124 PetriNetUnfolderBase]: 3789/6544 cut-off events. [2024-06-21 18:15:14,259 INFO L125 PetriNetUnfolderBase]: For 1316098/1316098 co-relation queries the response was YES. [2024-06-21 18:15:14,308 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. [2024-06-21 18:15:14,330 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 183 selfloop transitions, 128 changer transitions 4/322 dead transitions. [2024-06-21 18:15:14,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 322 transitions, 4613 flow [2024-06-21 18:15:14,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:15:14,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:15:14,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-21 18:15:14,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993589743589743 [2024-06-21 18:15:14,331 INFO L175 Difference]: Start difference. First operand has 296 places, 295 transitions, 3897 flow. Second operand 8 states and 187 transitions. [2024-06-21 18:15:14,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 322 transitions, 4613 flow [2024-06-21 18:15:17,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 322 transitions, 4418 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 18:15:17,535 INFO L231 Difference]: Finished difference. Result has 300 places, 293 transitions, 3934 flow [2024-06-21 18:15:17,535 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} [2024-06-21 18:15:17,535 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 260 predicate places. [2024-06-21 18:15:17,535 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 293 transitions, 3934 flow [2024-06-21 18:15:17,535 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) [2024-06-21 18:15:17,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:17,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:17,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 18:15:17,535 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:15:17,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:17,536 INFO L85 PathProgramCache]: Analyzing trace with hash 699850259, now seen corresponding path program 4 times [2024-06-21 18:15:17,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:17,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962912698] [2024-06-21 18:15:17,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:17,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:17,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:17,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962912698] [2024-06-21 18:15:17,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962912698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:17,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:17,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:17,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246402464] [2024-06-21 18:15:17,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:17,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:17,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:17,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:17,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:17,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:15:17,663 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) [2024-06-21 18:15:17,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:17,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:15:17,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:18,665 INFO L124 PetriNetUnfolderBase]: 3621/6233 cut-off events. [2024-06-21 18:15:18,666 INFO L125 PetriNetUnfolderBase]: For 1343840/1343840 co-relation queries the response was YES. [2024-06-21 18:15:18,715 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. [2024-06-21 18:15:18,735 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 262 selfloop transitions, 36 changer transitions 15/320 dead transitions. [2024-06-21 18:15:18,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 320 transitions, 4671 flow [2024-06-21 18:15:18,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:15:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:15:18,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-21 18:15:18,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5538461538461539 [2024-06-21 18:15:18,736 INFO L175 Difference]: Start difference. First operand has 300 places, 293 transitions, 3934 flow. Second operand 10 states and 216 transitions. [2024-06-21 18:15:18,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 320 transitions, 4671 flow [2024-06-21 18:15:21,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 320 transitions, 4400 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 18:15:21,219 INFO L231 Difference]: Finished difference. Result has 303 places, 287 transitions, 3666 flow [2024-06-21 18:15:21,219 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} [2024-06-21 18:15:21,219 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 263 predicate places. [2024-06-21 18:15:21,219 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 287 transitions, 3666 flow [2024-06-21 18:15:21,219 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) [2024-06-21 18:15:21,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:21,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:21,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 18:15:21,220 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:15:21,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:21,220 INFO L85 PathProgramCache]: Analyzing trace with hash 500548469, now seen corresponding path program 5 times [2024-06-21 18:15:21,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:21,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556487486] [2024-06-21 18:15:21,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:21,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:21,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:21,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556487486] [2024-06-21 18:15:21,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556487486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:21,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:21,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:21,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326278982] [2024-06-21 18:15:21,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:21,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:21,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:21,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:21,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:21,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:15:21,351 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) [2024-06-21 18:15:21,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:21,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:15:21,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:22,293 INFO L124 PetriNetUnfolderBase]: 3427/5921 cut-off events. [2024-06-21 18:15:22,293 INFO L125 PetriNetUnfolderBase]: For 1241668/1241668 co-relation queries the response was YES. [2024-06-21 18:15:22,340 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. [2024-06-21 18:15:22,359 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 261 selfloop transitions, 31 changer transitions 13/312 dead transitions. [2024-06-21 18:15:22,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 312 transitions, 4356 flow [2024-06-21 18:15:22,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:15:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:15:22,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-21 18:15:22,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-21 18:15:22,360 INFO L175 Difference]: Start difference. First operand has 303 places, 287 transitions, 3666 flow. Second operand 9 states and 198 transitions. [2024-06-21 18:15:22,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 312 transitions, 4356 flow [2024-06-21 18:15:24,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 312 transitions, 4274 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 18:15:24,492 INFO L231 Difference]: Finished difference. Result has 301 places, 282 transitions, 3559 flow [2024-06-21 18:15:24,492 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} [2024-06-21 18:15:24,492 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 261 predicate places. [2024-06-21 18:15:24,492 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 282 transitions, 3559 flow [2024-06-21 18:15:24,492 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) [2024-06-21 18:15:24,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:24,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:24,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 18:15:24,492 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:15:24,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:24,493 INFO L85 PathProgramCache]: Analyzing trace with hash 164811091, now seen corresponding path program 6 times [2024-06-21 18:15:24,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:24,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106666581] [2024-06-21 18:15:24,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:24,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:24,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:24,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:24,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106666581] [2024-06-21 18:15:24,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106666581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:24,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:24,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:24,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460949902] [2024-06-21 18:15:24,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:24,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:24,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:24,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:24,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:24,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:15:24,644 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) [2024-06-21 18:15:24,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:24,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:15:24,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:25,612 INFO L124 PetriNetUnfolderBase]: 3379/5863 cut-off events. [2024-06-21 18:15:25,612 INFO L125 PetriNetUnfolderBase]: For 1224632/1224632 co-relation queries the response was YES. [2024-06-21 18:15:25,657 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. [2024-06-21 18:15:25,674 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 265 selfloop transitions, 32 changer transitions 8/312 dead transitions. [2024-06-21 18:15:25,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 312 transitions, 4300 flow [2024-06-21 18:15:25,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:15:25,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:15:25,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-21 18:15:25,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698005698005698 [2024-06-21 18:15:25,675 INFO L175 Difference]: Start difference. First operand has 301 places, 282 transitions, 3559 flow. Second operand 9 states and 200 transitions. [2024-06-21 18:15:25,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 312 transitions, 4300 flow [2024-06-21 18:15:27,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 312 transitions, 4218 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 18:15:27,989 INFO L231 Difference]: Finished difference. Result has 299 places, 281 transitions, 3545 flow [2024-06-21 18:15:27,989 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} [2024-06-21 18:15:27,989 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 259 predicate places. [2024-06-21 18:15:27,990 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 281 transitions, 3545 flow [2024-06-21 18:15:27,990 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) [2024-06-21 18:15:27,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:27,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:27,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 18:15:27,990 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:15:27,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:27,990 INFO L85 PathProgramCache]: Analyzing trace with hash 164810750, now seen corresponding path program 4 times [2024-06-21 18:15:27,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:27,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044055038] [2024-06-21 18:15:27,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:27,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:28,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:28,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044055038] [2024-06-21 18:15:28,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044055038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:28,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:28,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:15:28,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421480413] [2024-06-21 18:15:28,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:28,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:15:28,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:28,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:15:28,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:15:28,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:15:28,121 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) [2024-06-21 18:15:28,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:28,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:15:28,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:29,119 INFO L124 PetriNetUnfolderBase]: 3265/5661 cut-off events. [2024-06-21 18:15:29,120 INFO L125 PetriNetUnfolderBase]: For 1110506/1110506 co-relation queries the response was YES. [2024-06-21 18:15:29,155 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. [2024-06-21 18:15:29,171 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 275 selfloop transitions, 23 changer transitions 0/305 dead transitions. [2024-06-21 18:15:29,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 305 transitions, 4211 flow [2024-06-21 18:15:29,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:15:29,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:15:29,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-21 18:15:29,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-21 18:15:29,172 INFO L175 Difference]: Start difference. First operand has 299 places, 281 transitions, 3545 flow. Second operand 8 states and 176 transitions. [2024-06-21 18:15:29,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 305 transitions, 4211 flow [2024-06-21 18:15:31,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 305 transitions, 4123 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 18:15:31,796 INFO L231 Difference]: Finished difference. Result has 300 places, 281 transitions, 3507 flow [2024-06-21 18:15:31,796 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} [2024-06-21 18:15:31,796 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 260 predicate places. [2024-06-21 18:15:31,796 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 281 transitions, 3507 flow [2024-06-21 18:15:31,796 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) [2024-06-21 18:15:31,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:31,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:31,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 18:15:31,797 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:15:31,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:31,797 INFO L85 PathProgramCache]: Analyzing trace with hash 170536543, now seen corresponding path program 1 times [2024-06-21 18:15:31,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:31,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612109188] [2024-06-21 18:15:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:31,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:31,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:31,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612109188] [2024-06-21 18:15:31,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612109188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:31,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:31,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:31,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481388126] [2024-06-21 18:15:31,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:31,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:31,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:31,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:31,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:31,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:15:31,928 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) [2024-06-21 18:15:31,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:31,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:15:31,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:32,801 INFO L124 PetriNetUnfolderBase]: 3191/5531 cut-off events. [2024-06-21 18:15:32,802 INFO L125 PetriNetUnfolderBase]: For 1110803/1110803 co-relation queries the response was YES. [2024-06-21 18:15:32,844 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. [2024-06-21 18:15:32,859 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 253 selfloop transitions, 23 changer transitions 30/313 dead transitions. [2024-06-21 18:15:32,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 313 transitions, 4235 flow [2024-06-21 18:15:32,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:15:32,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:15:32,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-21 18:15:32,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564102564102564 [2024-06-21 18:15:32,860 INFO L175 Difference]: Start difference. First operand has 300 places, 281 transitions, 3507 flow. Second operand 10 states and 217 transitions. [2024-06-21 18:15:32,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 313 transitions, 4235 flow [2024-06-21 18:15:35,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 313 transitions, 4173 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 18:15:35,333 INFO L231 Difference]: Finished difference. Result has 303 places, 267 transitions, 3292 flow [2024-06-21 18:15:35,333 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} [2024-06-21 18:15:35,333 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 263 predicate places. [2024-06-21 18:15:35,334 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 267 transitions, 3292 flow [2024-06-21 18:15:35,334 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) [2024-06-21 18:15:35,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:35,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:35,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 18:15:35,334 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:15:35,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:35,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1654577152, now seen corresponding path program 7 times [2024-06-21 18:15:35,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:35,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876575693] [2024-06-21 18:15:35,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:35,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:35,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:35,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876575693] [2024-06-21 18:15:35,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876575693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:35,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:35,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:35,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021478253] [2024-06-21 18:15:35,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:35,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:35,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:35,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:35,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:35,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:15:35,466 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) [2024-06-21 18:15:35,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:35,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:15:35,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:36,285 INFO L124 PetriNetUnfolderBase]: 2986/5157 cut-off events. [2024-06-21 18:15:36,285 INFO L125 PetriNetUnfolderBase]: For 1047083/1047086 co-relation queries the response was YES. [2024-06-21 18:15:36,326 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. [2024-06-21 18:15:36,343 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 228 selfloop transitions, 55 changer transitions 0/290 dead transitions. [2024-06-21 18:15:36,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 290 transitions, 3937 flow [2024-06-21 18:15:36,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:15:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:15:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 18:15:36,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-21 18:15:36,344 INFO L175 Difference]: Start difference. First operand has 303 places, 267 transitions, 3292 flow. Second operand 8 states and 180 transitions. [2024-06-21 18:15:36,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 290 transitions, 3937 flow [2024-06-21 18:15:38,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 290 transitions, 3848 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-21 18:15:38,727 INFO L231 Difference]: Finished difference. Result has 287 places, 268 transitions, 3333 flow [2024-06-21 18:15:38,727 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} [2024-06-21 18:15:38,728 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 247 predicate places. [2024-06-21 18:15:38,728 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 268 transitions, 3333 flow [2024-06-21 18:15:38,728 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) [2024-06-21 18:15:38,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:38,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:38,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 18:15:38,728 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:15:38,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:38,729 INFO L85 PathProgramCache]: Analyzing trace with hash -703905864, now seen corresponding path program 8 times [2024-06-21 18:15:38,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:38,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163620447] [2024-06-21 18:15:38,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:38,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:38,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:38,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163620447] [2024-06-21 18:15:38,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163620447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:38,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:38,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:38,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338640242] [2024-06-21 18:15:38,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:38,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:38,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:38,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:38,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:38,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:15:38,859 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) [2024-06-21 18:15:38,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:38,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:15:38,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:39,668 INFO L124 PetriNetUnfolderBase]: 2968/5113 cut-off events. [2024-06-21 18:15:39,669 INFO L125 PetriNetUnfolderBase]: For 1015609/1015612 co-relation queries the response was YES. [2024-06-21 18:15:39,709 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. [2024-06-21 18:15:39,725 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 226 selfloop transitions, 55 changer transitions 0/288 dead transitions. [2024-06-21 18:15:39,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 288 transitions, 3955 flow [2024-06-21 18:15:39,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:15:39,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:15:39,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-21 18:15:39,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5498575498575499 [2024-06-21 18:15:39,726 INFO L175 Difference]: Start difference. First operand has 287 places, 268 transitions, 3333 flow. Second operand 9 states and 193 transitions. [2024-06-21 18:15:39,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 288 transitions, 3955 flow [2024-06-21 18:15:42,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 288 transitions, 3842 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 18:15:42,263 INFO L231 Difference]: Finished difference. Result has 290 places, 268 transitions, 3335 flow [2024-06-21 18:15:42,263 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} [2024-06-21 18:15:42,264 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 250 predicate places. [2024-06-21 18:15:42,264 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 268 transitions, 3335 flow [2024-06-21 18:15:42,264 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) [2024-06-21 18:15:42,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:42,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:42,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 18:15:42,264 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:15:42,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:42,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1319328772, now seen corresponding path program 9 times [2024-06-21 18:15:42,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:42,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816050095] [2024-06-21 18:15:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:42,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:42,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:42,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:42,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816050095] [2024-06-21 18:15:42,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816050095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:42,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:42,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:15:42,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476796304] [2024-06-21 18:15:42,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:42,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:15:42,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:42,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:15:42,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:15:42,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:15:42,399 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) [2024-06-21 18:15:42,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:42,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:15:42,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:43,172 INFO L124 PetriNetUnfolderBase]: 2955/5095 cut-off events. [2024-06-21 18:15:43,172 INFO L125 PetriNetUnfolderBase]: For 1003940/1003940 co-relation queries the response was YES. [2024-06-21 18:15:43,209 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. [2024-06-21 18:15:43,225 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 250 selfloop transitions, 51 changer transitions 0/308 dead transitions. [2024-06-21 18:15:43,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 308 transitions, 4057 flow [2024-06-21 18:15:43,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:15:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:15:43,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 18:15:43,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314102564102564 [2024-06-21 18:15:43,226 INFO L175 Difference]: Start difference. First operand has 290 places, 268 transitions, 3335 flow. Second operand 8 states and 197 transitions. [2024-06-21 18:15:43,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 308 transitions, 4057 flow [2024-06-21 18:15:46,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 308 transitions, 3921 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:15:46,019 INFO L231 Difference]: Finished difference. Result has 290 places, 268 transitions, 3309 flow [2024-06-21 18:15:46,019 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} [2024-06-21 18:15:46,019 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 250 predicate places. [2024-06-21 18:15:46,019 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 268 transitions, 3309 flow [2024-06-21 18:15:46,020 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) [2024-06-21 18:15:46,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:46,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:46,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 18:15:46,020 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:15:46,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:46,020 INFO L85 PathProgramCache]: Analyzing trace with hash -117214483, now seen corresponding path program 7 times [2024-06-21 18:15:46,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:46,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744339427] [2024-06-21 18:15:46,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:46,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:46,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:46,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744339427] [2024-06-21 18:15:46,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744339427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:46,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:46,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:46,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282243883] [2024-06-21 18:15:46,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:46,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:46,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:46,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:46,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:46,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:15:46,133 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) [2024-06-21 18:15:46,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:46,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:15:46,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:47,038 INFO L124 PetriNetUnfolderBase]: 3087/5299 cut-off events. [2024-06-21 18:15:47,039 INFO L125 PetriNetUnfolderBase]: For 1113657/1113660 co-relation queries the response was YES. [2024-06-21 18:15:47,080 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. [2024-06-21 18:15:47,097 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 170 selfloop transitions, 125 changer transitions 0/302 dead transitions. [2024-06-21 18:15:47,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 302 transitions, 4281 flow [2024-06-21 18:15:47,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:15:47,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:15:47,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 18:15:47,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6089743589743589 [2024-06-21 18:15:47,098 INFO L175 Difference]: Start difference. First operand has 290 places, 268 transitions, 3309 flow. Second operand 8 states and 190 transitions. [2024-06-21 18:15:47,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 302 transitions, 4281 flow [2024-06-21 18:15:49,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 302 transitions, 4186 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:15:49,726 INFO L231 Difference]: Finished difference. Result has 291 places, 272 transitions, 3606 flow [2024-06-21 18:15:49,726 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} [2024-06-21 18:15:49,726 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 251 predicate places. [2024-06-21 18:15:49,726 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 272 transitions, 3606 flow [2024-06-21 18:15:49,726 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) [2024-06-21 18:15:49,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:49,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:49,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 18:15:49,727 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:15:49,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:49,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1773285408, now seen corresponding path program 5 times [2024-06-21 18:15:49,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:49,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467965643] [2024-06-21 18:15:49,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:49,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:49,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:49,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467965643] [2024-06-21 18:15:49,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467965643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:49,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:49,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:49,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339266913] [2024-06-21 18:15:49,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:49,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:49,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:49,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:49,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:49,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:15:49,862 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) [2024-06-21 18:15:49,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:49,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:15:49,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:50,705 INFO L124 PetriNetUnfolderBase]: 3107/5339 cut-off events. [2024-06-21 18:15:50,705 INFO L125 PetriNetUnfolderBase]: For 1093310/1093313 co-relation queries the response was YES. [2024-06-21 18:15:50,746 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. [2024-06-21 18:15:50,765 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 228 selfloop transitions, 64 changer transitions 0/299 dead transitions. [2024-06-21 18:15:50,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 299 transitions, 4274 flow [2024-06-21 18:15:50,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:15:50,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:15:50,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 18:15:50,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865384615384616 [2024-06-21 18:15:50,766 INFO L175 Difference]: Start difference. First operand has 291 places, 272 transitions, 3606 flow. Second operand 8 states and 183 transitions. [2024-06-21 18:15:50,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 299 transitions, 4274 flow [2024-06-21 18:15:52,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 299 transitions, 4099 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 18:15:52,615 INFO L231 Difference]: Finished difference. Result has 295 places, 273 transitions, 3581 flow [2024-06-21 18:15:52,615 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} [2024-06-21 18:15:52,615 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 255 predicate places. [2024-06-21 18:15:52,615 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 273 transitions, 3581 flow [2024-06-21 18:15:52,616 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) [2024-06-21 18:15:52,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:52,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:52,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 18:15:52,616 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:15:52,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:52,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1654392361, now seen corresponding path program 8 times [2024-06-21 18:15:52,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:52,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468485338] [2024-06-21 18:15:52,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:52,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:52,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:52,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468485338] [2024-06-21 18:15:52,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468485338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:52,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:52,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:52,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025357428] [2024-06-21 18:15:52,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:52,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:52,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:52,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:52,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:52,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:15:52,742 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) [2024-06-21 18:15:52,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:52,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:15:52,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:53,588 INFO L124 PetriNetUnfolderBase]: 3173/5455 cut-off events. [2024-06-21 18:15:53,588 INFO L125 PetriNetUnfolderBase]: For 1149601/1149604 co-relation queries the response was YES. [2024-06-21 18:15:53,628 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. [2024-06-21 18:15:53,644 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 175 selfloop transitions, 119 changer transitions 0/301 dead transitions. [2024-06-21 18:15:53,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 301 transitions, 4489 flow [2024-06-21 18:15:53,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:15:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:15:53,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-21 18:15:53,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993589743589743 [2024-06-21 18:15:53,645 INFO L175 Difference]: Start difference. First operand has 295 places, 273 transitions, 3581 flow. Second operand 8 states and 187 transitions. [2024-06-21 18:15:53,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 301 transitions, 4489 flow [2024-06-21 18:15:55,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 301 transitions, 4353 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 18:15:55,854 INFO L231 Difference]: Finished difference. Result has 297 places, 275 transitions, 3743 flow [2024-06-21 18:15:55,854 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} [2024-06-21 18:15:55,854 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 257 predicate places. [2024-06-21 18:15:55,854 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 275 transitions, 3743 flow [2024-06-21 18:15:55,854 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) [2024-06-21 18:15:55,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:55,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:55,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 18:15:55,855 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:15:55,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:55,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1654392702, now seen corresponding path program 6 times [2024-06-21 18:15:55,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:55,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764883605] [2024-06-21 18:15:55,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:55,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:55,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:55,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764883605] [2024-06-21 18:15:55,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764883605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:55,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:55,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:55,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041070884] [2024-06-21 18:15:55,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:55,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:55,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:55,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:55,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:55,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:15:55,984 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) [2024-06-21 18:15:55,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:55,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:15:55,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:15:56,827 INFO L124 PetriNetUnfolderBase]: 3193/5484 cut-off events. [2024-06-21 18:15:56,827 INFO L125 PetriNetUnfolderBase]: For 1175919/1175922 co-relation queries the response was YES. [2024-06-21 18:15:56,867 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. [2024-06-21 18:15:56,884 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 237 selfloop transitions, 58 changer transitions 0/302 dead transitions. [2024-06-21 18:15:56,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 302 transitions, 4431 flow [2024-06-21 18:15:56,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:15:56,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:15:56,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-21 18:15:56,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698005698005698 [2024-06-21 18:15:56,884 INFO L175 Difference]: Start difference. First operand has 297 places, 275 transitions, 3743 flow. Second operand 9 states and 200 transitions. [2024-06-21 18:15:56,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 302 transitions, 4431 flow [2024-06-21 18:15:59,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 302 transitions, 4265 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 18:15:59,571 INFO L231 Difference]: Finished difference. Result has 302 places, 276 transitions, 3717 flow [2024-06-21 18:15:59,571 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} [2024-06-21 18:15:59,571 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 262 predicate places. [2024-06-21 18:15:59,572 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 276 transitions, 3717 flow [2024-06-21 18:15:59,572 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) [2024-06-21 18:15:59,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:15:59,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:15:59,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 18:15:59,572 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:15:59,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:15:59,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1654244491, now seen corresponding path program 9 times [2024-06-21 18:15:59,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:15:59,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545867364] [2024-06-21 18:15:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:15:59,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:15:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:15:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:15:59,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:15:59,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545867364] [2024-06-21 18:15:59,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545867364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:15:59,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:15:59,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:15:59,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914763360] [2024-06-21 18:15:59,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:15:59,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:15:59,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:15:59,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:15:59,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:15:59,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:15:59,688 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) [2024-06-21 18:15:59,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:15:59,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:15:59,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:00,499 INFO L124 PetriNetUnfolderBase]: 3175/5467 cut-off events. [2024-06-21 18:16:00,499 INFO L125 PetriNetUnfolderBase]: For 1172685/1172688 co-relation queries the response was YES. [2024-06-21 18:16:00,540 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. [2024-06-21 18:16:00,556 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 174 selfloop transitions, 117 changer transitions 0/298 dead transitions. [2024-06-21 18:16:00,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 298 transitions, 4367 flow [2024-06-21 18:16:00,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:16:00,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:16:00,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 18:16:00,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865384615384616 [2024-06-21 18:16:00,557 INFO L175 Difference]: Start difference. First operand has 302 places, 276 transitions, 3717 flow. Second operand 8 states and 183 transitions. [2024-06-21 18:16:00,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 298 transitions, 4367 flow [2024-06-21 18:16:03,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 298 transitions, 4227 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 18:16:03,372 INFO L231 Difference]: Finished difference. Result has 303 places, 276 transitions, 3816 flow [2024-06-21 18:16:03,372 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} [2024-06-21 18:16:03,372 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 263 predicate places. [2024-06-21 18:16:03,372 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 276 transitions, 3816 flow [2024-06-21 18:16:03,373 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) [2024-06-21 18:16:03,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:03,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:03,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 18:16:03,373 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:16:03,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:03,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1798089124, now seen corresponding path program 7 times [2024-06-21 18:16:03,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:03,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858730560] [2024-06-21 18:16:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:03,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:03,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:03,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858730560] [2024-06-21 18:16:03,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858730560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:03,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:03,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:16:03,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907355325] [2024-06-21 18:16:03,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:03,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:16:03,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:03,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:16:03,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:16:03,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:16:03,504 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) [2024-06-21 18:16:03,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:03,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:16:03,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:04,323 INFO L124 PetriNetUnfolderBase]: 3195/5509 cut-off events. [2024-06-21 18:16:04,324 INFO L125 PetriNetUnfolderBase]: For 1185975/1185978 co-relation queries the response was YES. [2024-06-21 18:16:04,367 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. [2024-06-21 18:16:04,385 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 211 selfloop transitions, 89 changer transitions 0/307 dead transitions. [2024-06-21 18:16:04,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 307 transitions, 4900 flow [2024-06-21 18:16:04,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:16:04,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:16:04,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 18:16:04,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608058608058608 [2024-06-21 18:16:04,386 INFO L175 Difference]: Start difference. First operand has 303 places, 276 transitions, 3816 flow. Second operand 7 states and 166 transitions. [2024-06-21 18:16:04,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 307 transitions, 4900 flow [2024-06-21 18:16:08,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 307 transitions, 4661 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 18:16:08,466 INFO L231 Difference]: Finished difference. Result has 303 places, 277 transitions, 3773 flow [2024-06-21 18:16:08,466 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} [2024-06-21 18:16:08,466 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 263 predicate places. [2024-06-21 18:16:08,466 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 277 transitions, 3773 flow [2024-06-21 18:16:08,466 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) [2024-06-21 18:16:08,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:08,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:08,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 18:16:08,466 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:16:08,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:08,467 INFO L85 PathProgramCache]: Analyzing trace with hash 2063405408, now seen corresponding path program 8 times [2024-06-21 18:16:08,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:08,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086920837] [2024-06-21 18:16:08,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:08,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:08,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:08,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086920837] [2024-06-21 18:16:08,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086920837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:08,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:08,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:16:08,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142457696] [2024-06-21 18:16:08,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:08,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:16:08,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:08,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:16:08,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:16:08,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:16:08,603 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) [2024-06-21 18:16:08,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:08,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:16:08,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:09,462 INFO L124 PetriNetUnfolderBase]: 3215/5541 cut-off events. [2024-06-21 18:16:09,462 INFO L125 PetriNetUnfolderBase]: For 1214019/1214022 co-relation queries the response was YES. [2024-06-21 18:16:09,504 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. [2024-06-21 18:16:09,521 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 214 selfloop transitions, 87 changer transitions 0/308 dead transitions. [2024-06-21 18:16:09,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 308 transitions, 4481 flow [2024-06-21 18:16:09,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:16:09,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:16:09,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-21 18:16:09,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993589743589743 [2024-06-21 18:16:09,522 INFO L175 Difference]: Start difference. First operand has 303 places, 277 transitions, 3773 flow. Second operand 8 states and 187 transitions. [2024-06-21 18:16:09,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 308 transitions, 4481 flow [2024-06-21 18:16:13,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 308 transitions, 4238 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 18:16:13,757 INFO L231 Difference]: Finished difference. Result has 306 places, 278 transitions, 3726 flow [2024-06-21 18:16:13,757 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} [2024-06-21 18:16:13,757 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 266 predicate places. [2024-06-21 18:16:13,757 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 278 transitions, 3726 flow [2024-06-21 18:16:13,757 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) [2024-06-21 18:16:13,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:13,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:13,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 18:16:13,757 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:16:13,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:13,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1883263447, now seen corresponding path program 10 times [2024-06-21 18:16:13,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:13,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210169086] [2024-06-21 18:16:13,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:13,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:13,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:13,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:13,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210169086] [2024-06-21 18:16:13,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210169086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:13,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:13,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:16:13,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579078933] [2024-06-21 18:16:13,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:13,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:16:13,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:13,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:16:13,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:16:13,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:16:13,864 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) [2024-06-21 18:16:13,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:13,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:16:13,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:14,786 INFO L124 PetriNetUnfolderBase]: 3268/5588 cut-off events. [2024-06-21 18:16:14,786 INFO L125 PetriNetUnfolderBase]: For 1265353/1265356 co-relation queries the response was YES. [2024-06-21 18:16:14,823 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. [2024-06-21 18:16:14,837 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 160 selfloop transitions, 150 changer transitions 0/317 dead transitions. [2024-06-21 18:16:14,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 317 transitions, 4914 flow [2024-06-21 18:16:14,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:16:14,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:16:14,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 18:16:14,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2024-06-21 18:16:14,838 INFO L175 Difference]: Start difference. First operand has 306 places, 278 transitions, 3726 flow. Second operand 8 states and 196 transitions. [2024-06-21 18:16:14,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 317 transitions, 4914 flow [2024-06-21 18:16:19,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 317 transitions, 4740 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 18:16:19,120 INFO L231 Difference]: Finished difference. Result has 309 places, 280 transitions, 3927 flow [2024-06-21 18:16:19,120 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} [2024-06-21 18:16:19,120 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 269 predicate places. [2024-06-21 18:16:19,120 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 280 transitions, 3927 flow [2024-06-21 18:16:19,120 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) [2024-06-21 18:16:19,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:19,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:19,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 18:16:19,121 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:16:19,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:19,121 INFO L85 PathProgramCache]: Analyzing trace with hash -2086576779, now seen corresponding path program 11 times [2024-06-21 18:16:19,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:19,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101185888] [2024-06-21 18:16:19,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:19,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:19,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:19,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101185888] [2024-06-21 18:16:19,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101185888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:19,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:19,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:16:19,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533372293] [2024-06-21 18:16:19,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:19,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:16:19,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:19,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:16:19,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:16:19,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:16:19,247 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) [2024-06-21 18:16:19,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:19,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:16:19,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:20,137 INFO L124 PetriNetUnfolderBase]: 3288/5666 cut-off events. [2024-06-21 18:16:20,137 INFO L125 PetriNetUnfolderBase]: For 1296641/1296641 co-relation queries the response was YES. [2024-06-21 18:16:20,182 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. [2024-06-21 18:16:20,201 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 272 selfloop transitions, 31 changer transitions 0/310 dead transitions. [2024-06-21 18:16:20,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 310 transitions, 4664 flow [2024-06-21 18:16:20,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:16:20,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:16:20,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 18:16:20,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-21 18:16:20,201 INFO L175 Difference]: Start difference. First operand has 309 places, 280 transitions, 3927 flow. Second operand 8 states and 180 transitions. [2024-06-21 18:16:20,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 310 transitions, 4664 flow [2024-06-21 18:16:24,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 310 transitions, 4177 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 18:16:24,585 INFO L231 Difference]: Finished difference. Result has 310 places, 281 transitions, 3541 flow [2024-06-21 18:16:24,585 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} [2024-06-21 18:16:24,586 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 270 predicate places. [2024-06-21 18:16:24,586 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 281 transitions, 3541 flow [2024-06-21 18:16:24,586 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) [2024-06-21 18:16:24,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:24,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:24,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 18:16:24,586 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:16:24,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:24,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1892517877, now seen corresponding path program 12 times [2024-06-21 18:16:24,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:24,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692916747] [2024-06-21 18:16:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:24,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:24,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:24,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692916747] [2024-06-21 18:16:24,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692916747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:24,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:24,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:16:24,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312178434] [2024-06-21 18:16:24,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:24,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:16:24,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:24,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:16:24,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:16:24,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:16:24,707 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) [2024-06-21 18:16:24,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:24,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:16:24,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:25,590 INFO L124 PetriNetUnfolderBase]: 3308/5663 cut-off events. [2024-06-21 18:16:25,590 INFO L125 PetriNetUnfolderBase]: For 1317462/1317465 co-relation queries the response was YES. [2024-06-21 18:16:25,634 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. [2024-06-21 18:16:25,651 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 160 selfloop transitions, 149 changer transitions 0/316 dead transitions. [2024-06-21 18:16:25,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 316 transitions, 4503 flow [2024-06-21 18:16:25,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:16:25,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:16:25,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 18:16:25,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6185897435897436 [2024-06-21 18:16:25,652 INFO L175 Difference]: Start difference. First operand has 310 places, 281 transitions, 3541 flow. Second operand 8 states and 193 transitions. [2024-06-21 18:16:25,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 316 transitions, 4503 flow [2024-06-21 18:16:30,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 316 transitions, 4369 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 18:16:30,245 INFO L231 Difference]: Finished difference. Result has 311 places, 282 transitions, 3735 flow [2024-06-21 18:16:30,246 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} [2024-06-21 18:16:30,246 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 271 predicate places. [2024-06-21 18:16:30,246 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 282 transitions, 3735 flow [2024-06-21 18:16:30,246 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) [2024-06-21 18:16:30,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:30,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:30,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 18:16:30,247 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:16:30,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:30,247 INFO L85 PathProgramCache]: Analyzing trace with hash -2086963070, now seen corresponding path program 9 times [2024-06-21 18:16:30,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:30,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28835558] [2024-06-21 18:16:30,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:30,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:30,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:30,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28835558] [2024-06-21 18:16:30,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28835558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:30,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:30,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:16:30,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788359595] [2024-06-21 18:16:30,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:30,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:16:30,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:30,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:16:30,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:16:30,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:16:30,391 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) [2024-06-21 18:16:30,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:30,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:16:30,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:31,303 INFO L124 PetriNetUnfolderBase]: 3328/5726 cut-off events. [2024-06-21 18:16:31,303 INFO L125 PetriNetUnfolderBase]: For 1346018/1346021 co-relation queries the response was YES. [2024-06-21 18:16:31,347 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. [2024-06-21 18:16:31,365 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 217 selfloop transitions, 90 changer transitions 0/314 dead transitions. [2024-06-21 18:16:31,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 314 transitions, 4454 flow [2024-06-21 18:16:31,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:16:31,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:16:31,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-21 18:16:31,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5783475783475783 [2024-06-21 18:16:31,367 INFO L175 Difference]: Start difference. First operand has 311 places, 282 transitions, 3735 flow. Second operand 9 states and 203 transitions. [2024-06-21 18:16:31,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 314 transitions, 4454 flow [2024-06-21 18:16:35,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 314 transitions, 4211 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 18:16:35,943 INFO L231 Difference]: Finished difference. Result has 315 places, 283 transitions, 3687 flow [2024-06-21 18:16:35,943 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} [2024-06-21 18:16:35,943 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 275 predicate places. [2024-06-21 18:16:35,943 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 283 transitions, 3687 flow [2024-06-21 18:16:35,943 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) [2024-06-21 18:16:35,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:35,943 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] [2024-06-21 18:16:35,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 18:16:35,944 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:16:35,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:35,944 INFO L85 PathProgramCache]: Analyzing trace with hash -296162639, now seen corresponding path program 13 times [2024-06-21 18:16:35,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:35,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323779209] [2024-06-21 18:16:35,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:35,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:36,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:36,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323779209] [2024-06-21 18:16:36,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323779209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:36,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:36,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:16:36,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106227252] [2024-06-21 18:16:36,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:36,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:16:36,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:36,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:16:36,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:16:36,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:16:36,070 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) [2024-06-21 18:16:36,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:36,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:16:36,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:36,993 INFO L124 PetriNetUnfolderBase]: 3356/5770 cut-off events. [2024-06-21 18:16:36,993 INFO L125 PetriNetUnfolderBase]: For 1383484/1383484 co-relation queries the response was YES. [2024-06-21 18:16:37,041 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. [2024-06-21 18:16:37,061 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 270 selfloop transitions, 26 changer transitions 0/303 dead transitions. [2024-06-21 18:16:37,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 303 transitions, 4368 flow [2024-06-21 18:16:37,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:16:37,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:16:37,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-21 18:16:37,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-21 18:16:37,062 INFO L175 Difference]: Start difference. First operand has 315 places, 283 transitions, 3687 flow. Second operand 8 states and 173 transitions. [2024-06-21 18:16:37,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 303 transitions, 4368 flow [2024-06-21 18:16:41,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 303 transitions, 4186 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 18:16:41,587 INFO L231 Difference]: Finished difference. Result has 316 places, 284 transitions, 3593 flow [2024-06-21 18:16:41,587 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} [2024-06-21 18:16:41,588 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 276 predicate places. [2024-06-21 18:16:41,588 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 284 transitions, 3593 flow [2024-06-21 18:16:41,588 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) [2024-06-21 18:16:41,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:41,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:41,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 18:16:41,588 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:16:41,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:41,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1552792435, now seen corresponding path program 14 times [2024-06-21 18:16:41,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:41,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675585052] [2024-06-21 18:16:41,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:41,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:41,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:41,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675585052] [2024-06-21 18:16:41,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675585052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:41,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:41,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:16:41,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984785042] [2024-06-21 18:16:41,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:41,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:16:41,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:41,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:16:41,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:16:41,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:16:41,720 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) [2024-06-21 18:16:41,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:41,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:16:41,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:42,701 INFO L124 PetriNetUnfolderBase]: 3409/5859 cut-off events. [2024-06-21 18:16:42,702 INFO L125 PetriNetUnfolderBase]: For 1432863/1432866 co-relation queries the response was YES. [2024-06-21 18:16:42,744 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. [2024-06-21 18:16:42,762 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 183 selfloop transitions, 119 changer transitions 0/309 dead transitions. [2024-06-21 18:16:42,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 309 transitions, 4537 flow [2024-06-21 18:16:42,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:16:42,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:16:42,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 18:16:42,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865384615384616 [2024-06-21 18:16:42,763 INFO L175 Difference]: Start difference. First operand has 316 places, 284 transitions, 3593 flow. Second operand 8 states and 183 transitions. [2024-06-21 18:16:42,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 309 transitions, 4537 flow [2024-06-21 18:16:47,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 309 transitions, 4466 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 18:16:47,438 INFO L231 Difference]: Finished difference. Result has 318 places, 286 transitions, 3828 flow [2024-06-21 18:16:47,438 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} [2024-06-21 18:16:47,438 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 278 predicate places. [2024-06-21 18:16:47,438 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 286 transitions, 3828 flow [2024-06-21 18:16:47,438 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) [2024-06-21 18:16:47,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:47,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:47,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 18:16:47,439 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:16:47,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:47,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1184326517, now seen corresponding path program 15 times [2024-06-21 18:16:47,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:47,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272990343] [2024-06-21 18:16:47,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:47,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:47,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:47,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272990343] [2024-06-21 18:16:47,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272990343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:47,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:47,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:16:47,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177080043] [2024-06-21 18:16:47,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:47,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:16:47,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:47,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:16:47,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:16:47,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:16:47,555 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) [2024-06-21 18:16:47,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:47,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:16:47,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:48,457 INFO L124 PetriNetUnfolderBase]: 3391/5823 cut-off events. [2024-06-21 18:16:48,457 INFO L125 PetriNetUnfolderBase]: For 1429561/1429564 co-relation queries the response was YES. [2024-06-21 18:16:48,505 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. [2024-06-21 18:16:48,524 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 182 selfloop transitions, 116 changer transitions 0/305 dead transitions. [2024-06-21 18:16:48,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 305 transitions, 4484 flow [2024-06-21 18:16:48,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:16:48,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:16:48,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 18:16:48,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-21 18:16:48,525 INFO L175 Difference]: Start difference. First operand has 318 places, 286 transitions, 3828 flow. Second operand 8 states and 180 transitions. [2024-06-21 18:16:48,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 305 transitions, 4484 flow [2024-06-21 18:16:52,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 305 transitions, 4300 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 18:16:52,886 INFO L231 Difference]: Finished difference. Result has 322 places, 286 transitions, 3881 flow [2024-06-21 18:16:52,887 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} [2024-06-21 18:16:52,887 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 282 predicate places. [2024-06-21 18:16:52,887 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 286 transitions, 3881 flow [2024-06-21 18:16:52,887 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) [2024-06-21 18:16:52,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:16:52,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:16:52,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 18:16:52,887 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:16:52,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:16:52,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1562843027, now seen corresponding path program 16 times [2024-06-21 18:16:52,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:16:52,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597400170] [2024-06-21 18:16:52,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:16:52,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:16:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:16:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:16:52,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:16:52,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597400170] [2024-06-21 18:16:52,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597400170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:16:52,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:16:52,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:16:52,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085578731] [2024-06-21 18:16:52,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:16:52,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:16:52,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:16:52,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:16:52,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:16:53,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:16:53,033 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) [2024-06-21 18:16:53,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:16:53,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:16:53,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:16:54,095 INFO L124 PetriNetUnfolderBase]: 3426/5892 cut-off events. [2024-06-21 18:16:54,095 INFO L125 PetriNetUnfolderBase]: For 1442838/1442838 co-relation queries the response was YES. [2024-06-21 18:16:54,145 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. [2024-06-21 18:16:54,166 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 277 selfloop transitions, 28 changer transitions 0/312 dead transitions. [2024-06-21 18:16:54,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 312 transitions, 4616 flow [2024-06-21 18:16:54,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:16:54,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:16:54,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-21 18:16:54,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527065527065527 [2024-06-21 18:16:54,167 INFO L175 Difference]: Start difference. First operand has 322 places, 286 transitions, 3881 flow. Second operand 9 states and 194 transitions. [2024-06-21 18:16:54,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 312 transitions, 4616 flow [2024-06-21 18:17:00,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 312 transitions, 4374 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 18:17:00,965 INFO L231 Difference]: Finished difference. Result has 325 places, 288 transitions, 3748 flow [2024-06-21 18:17:00,966 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} [2024-06-21 18:17:00,966 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 285 predicate places. [2024-06-21 18:17:00,966 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 288 transitions, 3748 flow [2024-06-21 18:17:00,966 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) [2024-06-21 18:17:00,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:00,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:17:00,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 18:17:00,966 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:17:00,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:00,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1184178306, now seen corresponding path program 10 times [2024-06-21 18:17:00,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:00,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13661776] [2024-06-21 18:17:00,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:00,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:01,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:01,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13661776] [2024-06-21 18:17:01,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13661776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:01,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:01,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:17:01,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087356605] [2024-06-21 18:17:01,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:01,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:17:01,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:01,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:17:01,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:17:01,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:17:01,103 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) [2024-06-21 18:17:01,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:01,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:17:01,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:02,139 INFO L124 PetriNetUnfolderBase]: 3413/5882 cut-off events. [2024-06-21 18:17:02,139 INFO L125 PetriNetUnfolderBase]: For 1427800/1427803 co-relation queries the response was YES. [2024-06-21 18:17:02,182 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. [2024-06-21 18:17:02,199 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 247 selfloop transitions, 58 changer transitions 0/312 dead transitions. [2024-06-21 18:17:02,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 312 transitions, 4432 flow [2024-06-21 18:17:02,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:17:02,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:17:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-21 18:17:02,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5461538461538461 [2024-06-21 18:17:02,200 INFO L175 Difference]: Start difference. First operand has 325 places, 288 transitions, 3748 flow. Second operand 10 states and 213 transitions. [2024-06-21 18:17:02,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 312 transitions, 4432 flow [2024-06-21 18:17:07,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 312 transitions, 4360 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 18:17:07,921 INFO L231 Difference]: Finished difference. Result has 329 places, 288 transitions, 3796 flow [2024-06-21 18:17:07,921 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} [2024-06-21 18:17:07,922 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 289 predicate places. [2024-06-21 18:17:07,922 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 288 transitions, 3796 flow [2024-06-21 18:17:07,922 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) [2024-06-21 18:17:07,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:07,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:17:07,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 18:17:07,922 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:17:07,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:07,922 INFO L85 PathProgramCache]: Analyzing trace with hash -430647149, now seen corresponding path program 17 times [2024-06-21 18:17:07,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:07,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569464835] [2024-06-21 18:17:07,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:07,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:08,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:08,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569464835] [2024-06-21 18:17:08,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569464835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:08,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:08,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:17:08,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654273052] [2024-06-21 18:17:08,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:08,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:17:08,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:08,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:17:08,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:17:08,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:17:08,045 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) [2024-06-21 18:17:08,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:08,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:17:08,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:09,022 INFO L124 PetriNetUnfolderBase]: 3433/5909 cut-off events. [2024-06-21 18:17:09,022 INFO L125 PetriNetUnfolderBase]: For 1454993/1454993 co-relation queries the response was YES. [2024-06-21 18:17:09,073 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. [2024-06-21 18:17:09,092 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 281 selfloop transitions, 26 changer transitions 0/314 dead transitions. [2024-06-21 18:17:09,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 314 transitions, 4527 flow [2024-06-21 18:17:09,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:17:09,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:17:09,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-21 18:17:09,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673076923076923 [2024-06-21 18:17:09,093 INFO L175 Difference]: Start difference. First operand has 329 places, 288 transitions, 3796 flow. Second operand 8 states and 177 transitions. [2024-06-21 18:17:09,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 314 transitions, 4527 flow [2024-06-21 18:17:15,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 314 transitions, 4370 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 18:17:15,047 INFO L231 Difference]: Finished difference. Result has 327 places, 289 transitions, 3726 flow [2024-06-21 18:17:15,047 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} [2024-06-21 18:17:15,047 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 287 predicate places. [2024-06-21 18:17:15,048 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 289 transitions, 3726 flow [2024-06-21 18:17:15,048 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) [2024-06-21 18:17:15,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:15,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:17:15,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 18:17:15,048 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:17:15,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:15,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1420353666, now seen corresponding path program 11 times [2024-06-21 18:17:15,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:15,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696544087] [2024-06-21 18:17:15,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:15,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:15,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:15,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696544087] [2024-06-21 18:17:15,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696544087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:15,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:15,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:17:15,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176769813] [2024-06-21 18:17:15,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:15,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:17:15,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:15,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:17:15,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:17:15,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:17:15,176 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) [2024-06-21 18:17:15,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:15,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:17:15,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:16,123 INFO L124 PetriNetUnfolderBase]: 3420/5891 cut-off events. [2024-06-21 18:17:16,123 INFO L125 PetriNetUnfolderBase]: For 1449356/1449359 co-relation queries the response was YES. [2024-06-21 18:17:16,172 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. [2024-06-21 18:17:16,190 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 239 selfloop transitions, 67 changer transitions 0/313 dead transitions. [2024-06-21 18:17:16,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 313 transitions, 4412 flow [2024-06-21 18:17:16,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:17:16,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:17:16,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-21 18:17:16,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584045584045584 [2024-06-21 18:17:16,191 INFO L175 Difference]: Start difference. First operand has 327 places, 289 transitions, 3726 flow. Second operand 9 states and 196 transitions. [2024-06-21 18:17:16,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 313 transitions, 4412 flow [2024-06-21 18:17:21,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 313 transitions, 4328 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 18:17:21,450 INFO L231 Difference]: Finished difference. Result has 330 places, 289 transitions, 3780 flow [2024-06-21 18:17:21,450 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} [2024-06-21 18:17:21,450 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 290 predicate places. [2024-06-21 18:17:21,451 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 289 transitions, 3780 flow [2024-06-21 18:17:21,451 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) [2024-06-21 18:17:21,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:21,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:17:21,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 18:17:21,451 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:17:21,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:21,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1420354007, now seen corresponding path program 18 times [2024-06-21 18:17:21,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:21,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264181401] [2024-06-21 18:17:21,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:21,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:21,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:21,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264181401] [2024-06-21 18:17:21,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264181401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:21,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:21,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:17:21,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17238075] [2024-06-21 18:17:21,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:21,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:17:21,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:21,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:17:21,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:17:21,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:17:21,568 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) [2024-06-21 18:17:21,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:21,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:17:21,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:22,630 INFO L124 PetriNetUnfolderBase]: 3440/5904 cut-off events. [2024-06-21 18:17:22,630 INFO L125 PetriNetUnfolderBase]: For 1475798/1475801 co-relation queries the response was YES. [2024-06-21 18:17:22,678 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. [2024-06-21 18:17:22,699 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 179 selfloop transitions, 130 changer transitions 0/316 dead transitions. [2024-06-21 18:17:22,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 316 transitions, 4527 flow [2024-06-21 18:17:22,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:17:22,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:17:22,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 18:17:22,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592948717948718 [2024-06-21 18:17:22,700 INFO L175 Difference]: Start difference. First operand has 330 places, 289 transitions, 3780 flow. Second operand 8 states and 185 transitions. [2024-06-21 18:17:22,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 316 transitions, 4527 flow [2024-06-21 18:17:28,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 316 transitions, 4389 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 18:17:28,231 INFO L231 Difference]: Finished difference. Result has 331 places, 290 transitions, 3939 flow [2024-06-21 18:17:28,231 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} [2024-06-21 18:17:28,231 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 291 predicate places. [2024-06-21 18:17:28,231 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 290 transitions, 3939 flow [2024-06-21 18:17:28,232 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) [2024-06-21 18:17:28,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:28,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:17:28,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 18:17:28,232 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:17:28,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:28,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1889716145, now seen corresponding path program 19 times [2024-06-21 18:17:28,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:28,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423926799] [2024-06-21 18:17:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:28,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:28,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:28,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423926799] [2024-06-21 18:17:28,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423926799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:28,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:28,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:17:28,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555228229] [2024-06-21 18:17:28,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:28,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:17:28,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:28,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:17:28,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:17:28,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:17:28,363 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) [2024-06-21 18:17:28,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:28,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:17:28,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:29,376 INFO L124 PetriNetUnfolderBase]: 3476/5980 cut-off events. [2024-06-21 18:17:29,376 INFO L125 PetriNetUnfolderBase]: For 1516637/1516637 co-relation queries the response was YES. [2024-06-21 18:17:29,428 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. [2024-06-21 18:17:29,448 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 278 selfloop transitions, 19 changer transitions 10/314 dead transitions. [2024-06-21 18:17:29,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 314 transitions, 4724 flow [2024-06-21 18:17:29,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:17:29,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:17:29,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-21 18:17:29,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-21 18:17:29,449 INFO L175 Difference]: Start difference. First operand has 331 places, 290 transitions, 3939 flow. Second operand 7 states and 154 transitions. [2024-06-21 18:17:29,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 314 transitions, 4724 flow [2024-06-21 18:17:36,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 314 transitions, 4434 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 18:17:36,177 INFO L231 Difference]: Finished difference. Result has 333 places, 292 transitions, 3735 flow [2024-06-21 18:17:36,177 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} [2024-06-21 18:17:36,177 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 293 predicate places. [2024-06-21 18:17:36,177 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 292 transitions, 3735 flow [2024-06-21 18:17:36,177 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) [2024-06-21 18:17:36,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:36,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:17:36,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 18:17:36,178 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:17:36,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:36,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1071471815, now seen corresponding path program 20 times [2024-06-21 18:17:36,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:36,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937946506] [2024-06-21 18:17:36,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:36,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:36,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:36,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937946506] [2024-06-21 18:17:36,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937946506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:36,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:36,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:17:36,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906770556] [2024-06-21 18:17:36,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:36,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:17:36,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:36,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:17:36,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:17:36,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:17:36,310 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) [2024-06-21 18:17:36,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:36,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:17:36,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:37,406 INFO L124 PetriNetUnfolderBase]: 3425/5901 cut-off events. [2024-06-21 18:17:37,406 INFO L125 PetriNetUnfolderBase]: For 1492023/1492023 co-relation queries the response was YES. [2024-06-21 18:17:37,456 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. [2024-06-21 18:17:37,475 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 265 selfloop transitions, 47 changer transitions 7/326 dead transitions. [2024-06-21 18:17:37,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 326 transitions, 4473 flow [2024-06-21 18:17:37,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:17:37,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:17:37,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 18:17:37,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2024-06-21 18:17:37,476 INFO L175 Difference]: Start difference. First operand has 333 places, 292 transitions, 3735 flow. Second operand 8 states and 196 transitions. [2024-06-21 18:17:37,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 326 transitions, 4473 flow [2024-06-21 18:17:43,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 326 transitions, 4425 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 18:17:43,186 INFO L231 Difference]: Finished difference. Result has 334 places, 288 transitions, 3716 flow [2024-06-21 18:17:43,186 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} [2024-06-21 18:17:43,186 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 294 predicate places. [2024-06-21 18:17:43,186 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 288 transitions, 3716 flow [2024-06-21 18:17:43,186 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) [2024-06-21 18:17:43,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:43,186 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] [2024-06-21 18:17:43,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 18:17:43,187 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:17:43,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:43,187 INFO L85 PathProgramCache]: Analyzing trace with hash 152826575, now seen corresponding path program 21 times [2024-06-21 18:17:43,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:43,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175953371] [2024-06-21 18:17:43,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:43,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:43,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:43,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175953371] [2024-06-21 18:17:43,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175953371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:43,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:43,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:17:43,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639874602] [2024-06-21 18:17:43,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:43,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:17:43,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:43,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:17:43,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:17:43,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:17:43,313 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) [2024-06-21 18:17:43,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:43,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:17:43,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:44,334 INFO L124 PetriNetUnfolderBase]: 3367/5803 cut-off events. [2024-06-21 18:17:44,334 INFO L125 PetriNetUnfolderBase]: For 1442577/1442577 co-relation queries the response was YES. [2024-06-21 18:17:44,382 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. [2024-06-21 18:17:44,400 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 256 selfloop transitions, 55 changer transitions 11/329 dead transitions. [2024-06-21 18:17:44,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 329 transitions, 4714 flow [2024-06-21 18:17:44,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:17:44,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:17:44,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 18:17:44,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6506410256410257 [2024-06-21 18:17:44,401 INFO L175 Difference]: Start difference. First operand has 334 places, 288 transitions, 3716 flow. Second operand 8 states and 203 transitions. [2024-06-21 18:17:44,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 329 transitions, 4714 flow [2024-06-21 18:17:49,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 329 transitions, 4604 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 18:17:49,885 INFO L231 Difference]: Finished difference. Result has 333 places, 280 transitions, 3603 flow [2024-06-21 18:17:49,885 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} [2024-06-21 18:17:49,885 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 293 predicate places. [2024-06-21 18:17:49,885 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 280 transitions, 3603 flow [2024-06-21 18:17:49,885 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) [2024-06-21 18:17:49,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:49,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:17:49,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 18:17:49,886 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:17:49,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:49,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1050901809, now seen corresponding path program 22 times [2024-06-21 18:17:49,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:49,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940474073] [2024-06-21 18:17:49,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:49,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:49,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:49,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:49,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940474073] [2024-06-21 18:17:49,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940474073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:49,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:49,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:17:49,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311344764] [2024-06-21 18:17:49,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:49,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:17:49,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:49,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:17:49,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:17:50,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:17:50,018 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) [2024-06-21 18:17:50,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:50,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:17:50,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:51,001 INFO L124 PetriNetUnfolderBase]: 3205/5554 cut-off events. [2024-06-21 18:17:51,001 INFO L125 PetriNetUnfolderBase]: For 1395702/1395702 co-relation queries the response was YES. [2024-06-21 18:17:51,050 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. [2024-06-21 18:17:51,069 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 260 selfloop transitions, 37 changer transitions 8/312 dead transitions. [2024-06-21 18:17:51,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 312 transitions, 4313 flow [2024-06-21 18:17:51,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:17:51,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:17:51,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 18:17:51,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-21 18:17:51,070 INFO L175 Difference]: Start difference. First operand has 333 places, 280 transitions, 3603 flow. Second operand 7 states and 175 transitions. [2024-06-21 18:17:51,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 312 transitions, 4313 flow [2024-06-21 18:17:56,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 312 transitions, 4152 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-21 18:17:56,950 INFO L231 Difference]: Finished difference. Result has 329 places, 274 transitions, 3428 flow [2024-06-21 18:17:56,951 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} [2024-06-21 18:17:56,951 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 289 predicate places. [2024-06-21 18:17:56,951 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 274 transitions, 3428 flow [2024-06-21 18:17:56,951 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) [2024-06-21 18:17:56,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:17:56,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:17:56,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 18:17:56,951 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:17:56,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:17:56,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1518818195, now seen corresponding path program 23 times [2024-06-21 18:17:56,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:17:56,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513498153] [2024-06-21 18:17:56,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:17:56,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:17:56,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:17:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:17:57,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:17:57,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513498153] [2024-06-21 18:17:57,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513498153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:17:57,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:17:57,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:17:57,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874393659] [2024-06-21 18:17:57,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:17:57,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:17:57,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:17:57,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:17:57,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:17:57,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:17:57,077 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) [2024-06-21 18:17:57,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:17:57,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:17:57,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:17:57,972 INFO L124 PetriNetUnfolderBase]: 3051/5315 cut-off events. [2024-06-21 18:17:57,973 INFO L125 PetriNetUnfolderBase]: For 1190827/1190832 co-relation queries the response was YES. [2024-06-21 18:17:58,020 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. [2024-06-21 18:17:58,040 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 238 selfloop transitions, 47 changer transitions 10/302 dead transitions. [2024-06-21 18:17:58,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 302 transitions, 4102 flow [2024-06-21 18:17:58,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:17:58,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:17:58,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 18:17:58,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592948717948718 [2024-06-21 18:17:58,041 INFO L175 Difference]: Start difference. First operand has 329 places, 274 transitions, 3428 flow. Second operand 8 states and 185 transitions. [2024-06-21 18:17:58,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 302 transitions, 4102 flow [2024-06-21 18:18:01,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 302 transitions, 3970 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 18:18:01,770 INFO L231 Difference]: Finished difference. Result has 327 places, 270 transitions, 3328 flow [2024-06-21 18:18:01,770 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} [2024-06-21 18:18:01,770 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 287 predicate places. [2024-06-21 18:18:01,770 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 270 transitions, 3328 flow [2024-06-21 18:18:01,770 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) [2024-06-21 18:18:01,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:01,770 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] [2024-06-21 18:18:01,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 18:18:01,771 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:18:01,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:01,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1200847981, now seen corresponding path program 24 times [2024-06-21 18:18:01,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:01,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308361323] [2024-06-21 18:18:01,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:01,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:01,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:01,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308361323] [2024-06-21 18:18:01,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308361323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:01,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:01,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:18:01,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096945047] [2024-06-21 18:18:01,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:01,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:18:01,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:01,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:18:01,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:18:01,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:18:01,895 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) [2024-06-21 18:18:01,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:01,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:18:01,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:02,849 INFO L124 PetriNetUnfolderBase]: 3122/5432 cut-off events. [2024-06-21 18:18:02,850 INFO L125 PetriNetUnfolderBase]: For 1321304/1321304 co-relation queries the response was YES. [2024-06-21 18:18:02,889 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. [2024-06-21 18:18:02,904 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 241 selfloop transitions, 47 changer transitions 13/308 dead transitions. [2024-06-21 18:18:02,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 308 transitions, 4067 flow [2024-06-21 18:18:02,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:18:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:18:02,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-21 18:18:02,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6068376068376068 [2024-06-21 18:18:02,905 INFO L175 Difference]: Start difference. First operand has 327 places, 270 transitions, 3328 flow. Second operand 9 states and 213 transitions. [2024-06-21 18:18:02,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 308 transitions, 4067 flow [2024-06-21 18:18:06,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 308 transitions, 3965 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 18:18:06,122 INFO L231 Difference]: Finished difference. Result has 326 places, 266 transitions, 3272 flow [2024-06-21 18:18:06,123 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} [2024-06-21 18:18:06,123 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 286 predicate places. [2024-06-21 18:18:06,123 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 266 transitions, 3272 flow [2024-06-21 18:18:06,123 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) [2024-06-21 18:18:06,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:06,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:06,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 18:18:06,123 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:18:06,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:06,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1813453979, now seen corresponding path program 25 times [2024-06-21 18:18:06,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:06,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406771711] [2024-06-21 18:18:06,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:06,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:06,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:06,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406771711] [2024-06-21 18:18:06,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406771711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:06,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:06,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:18:06,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89563404] [2024-06-21 18:18:06,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:06,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:18:06,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:06,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:18:06,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:18:06,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:18:06,276 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) [2024-06-21 18:18:06,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:06,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:18:06,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:07,161 INFO L124 PetriNetUnfolderBase]: 2993/5221 cut-off events. [2024-06-21 18:18:07,161 INFO L125 PetriNetUnfolderBase]: For 1101044/1101049 co-relation queries the response was YES. [2024-06-21 18:18:07,209 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. [2024-06-21 18:18:07,227 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 241 selfloop transitions, 49 changer transitions 0/297 dead transitions. [2024-06-21 18:18:07,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 297 transitions, 3936 flow [2024-06-21 18:18:07,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:18:07,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:18:07,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-21 18:18:07,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993589743589743 [2024-06-21 18:18:07,228 INFO L175 Difference]: Start difference. First operand has 326 places, 266 transitions, 3272 flow. Second operand 8 states and 187 transitions. [2024-06-21 18:18:07,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 297 transitions, 3936 flow [2024-06-21 18:18:10,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 297 transitions, 3824 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 18:18:10,681 INFO L231 Difference]: Finished difference. Result has 323 places, 266 transitions, 3262 flow [2024-06-21 18:18:10,681 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} [2024-06-21 18:18:10,682 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 283 predicate places. [2024-06-21 18:18:10,682 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 266 transitions, 3262 flow [2024-06-21 18:18:10,682 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) [2024-06-21 18:18:10,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:10,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:10,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 18:18:10,682 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:18:10,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:10,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1754845685, now seen corresponding path program 26 times [2024-06-21 18:18:10,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:10,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132566520] [2024-06-21 18:18:10,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:10,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:10,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:10,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132566520] [2024-06-21 18:18:10,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132566520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:10,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:10,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:18:10,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111654384] [2024-06-21 18:18:10,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:10,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:18:10,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:10,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:18:10,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:18:10,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:18:10,835 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) [2024-06-21 18:18:10,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:10,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:18:10,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:11,764 INFO L124 PetriNetUnfolderBase]: 3127/5435 cut-off events. [2024-06-21 18:18:11,764 INFO L125 PetriNetUnfolderBase]: For 1216427/1216432 co-relation queries the response was YES. [2024-06-21 18:18:11,810 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. [2024-06-21 18:18:11,829 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 238 selfloop transitions, 63 changer transitions 0/308 dead transitions. [2024-06-21 18:18:11,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 308 transitions, 4455 flow [2024-06-21 18:18:11,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:18:11,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:18:11,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 18:18:11,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378205128205128 [2024-06-21 18:18:11,830 INFO L175 Difference]: Start difference. First operand has 323 places, 266 transitions, 3262 flow. Second operand 8 states and 199 transitions. [2024-06-21 18:18:11,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 308 transitions, 4455 flow [2024-06-21 18:18:15,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 308 transitions, 4175 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 18:18:15,559 INFO L231 Difference]: Finished difference. Result has 322 places, 267 transitions, 3145 flow [2024-06-21 18:18:15,559 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} [2024-06-21 18:18:15,559 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 282 predicate places. [2024-06-21 18:18:15,559 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 267 transitions, 3145 flow [2024-06-21 18:18:15,560 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) [2024-06-21 18:18:15,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:15,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:15,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 18:18:15,560 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:18:15,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:15,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1755231635, now seen corresponding path program 27 times [2024-06-21 18:18:15,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:15,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868048097] [2024-06-21 18:18:15,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:15,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:15,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:15,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:15,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868048097] [2024-06-21 18:18:15,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868048097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:15,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:15,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:18:15,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066366555] [2024-06-21 18:18:15,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:15,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:18:15,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:15,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:18:15,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:18:15,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:18:15,691 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) [2024-06-21 18:18:15,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:15,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:18:15,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:16,610 INFO L124 PetriNetUnfolderBase]: 3114/5431 cut-off events. [2024-06-21 18:18:16,610 INFO L125 PetriNetUnfolderBase]: For 1203208/1203208 co-relation queries the response was YES. [2024-06-21 18:18:16,654 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. [2024-06-21 18:18:16,671 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 266 selfloop transitions, 18 changer transitions 0/291 dead transitions. [2024-06-21 18:18:16,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 291 transitions, 3785 flow [2024-06-21 18:18:16,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:18:16,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:18:16,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-21 18:18:16,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575091575091575 [2024-06-21 18:18:16,672 INFO L175 Difference]: Start difference. First operand has 322 places, 267 transitions, 3145 flow. Second operand 7 states and 157 transitions. [2024-06-21 18:18:16,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 291 transitions, 3785 flow [2024-06-21 18:18:22,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 291 transitions, 3487 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 18:18:22,578 INFO L231 Difference]: Finished difference. Result has 322 places, 267 transitions, 2887 flow [2024-06-21 18:18:22,579 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} [2024-06-21 18:18:22,579 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 282 predicate places. [2024-06-21 18:18:22,579 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 267 transitions, 2887 flow [2024-06-21 18:18:22,579 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) [2024-06-21 18:18:22,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:22,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:22,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 18:18:22,579 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:18:22,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:22,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1200995851, now seen corresponding path program 28 times [2024-06-21 18:18:22,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:22,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72129721] [2024-06-21 18:18:22,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:22,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:22,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:22,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:22,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72129721] [2024-06-21 18:18:22,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72129721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:22,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:22,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:18:22,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584423859] [2024-06-21 18:18:22,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:22,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:18:22,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:22,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:18:22,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:18:22,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:18:22,711 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) [2024-06-21 18:18:22,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:22,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:18:22,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:23,592 INFO L124 PetriNetUnfolderBase]: 3055/5322 cut-off events. [2024-06-21 18:18:23,592 INFO L125 PetriNetUnfolderBase]: For 1186932/1186932 co-relation queries the response was YES. [2024-06-21 18:18:23,637 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. [2024-06-21 18:18:23,653 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 248 selfloop transitions, 54 changer transitions 5/314 dead transitions. [2024-06-21 18:18:23,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 314 transitions, 3873 flow [2024-06-21 18:18:23,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:18:23,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:18:23,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-21 18:18:23,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2024-06-21 18:18:23,654 INFO L175 Difference]: Start difference. First operand has 322 places, 267 transitions, 2887 flow. Second operand 9 states and 222 transitions. [2024-06-21 18:18:23,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 314 transitions, 3873 flow [2024-06-21 18:18:28,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 314 transitions, 3634 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-21 18:18:28,556 INFO L231 Difference]: Finished difference. Result has 320 places, 265 transitions, 2730 flow [2024-06-21 18:18:28,556 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} [2024-06-21 18:18:28,556 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 280 predicate places. [2024-06-21 18:18:28,556 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 265 transitions, 2730 flow [2024-06-21 18:18:28,556 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) [2024-06-21 18:18:28,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:28,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:28,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 18:18:28,557 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:18:28,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:28,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1001546191, now seen corresponding path program 29 times [2024-06-21 18:18:28,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:28,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070745863] [2024-06-21 18:18:28,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:28,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:28,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:28,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070745863] [2024-06-21 18:18:28,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070745863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:28,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:28,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:18:28,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845647428] [2024-06-21 18:18:28,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:28,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:18:28,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:28,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:18:28,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:18:28,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:18:28,682 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) [2024-06-21 18:18:28,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:28,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:18:28,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:29,592 INFO L124 PetriNetUnfolderBase]: 2878/5032 cut-off events. [2024-06-21 18:18:29,592 INFO L125 PetriNetUnfolderBase]: For 1028766/1028766 co-relation queries the response was YES. [2024-06-21 18:18:29,626 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. [2024-06-21 18:18:29,639 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 237 selfloop transitions, 41 changer transitions 15/300 dead transitions. [2024-06-21 18:18:29,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 300 transitions, 3422 flow [2024-06-21 18:18:29,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:18:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:18:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-21 18:18:29,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-21 18:18:29,640 INFO L175 Difference]: Start difference. First operand has 320 places, 265 transitions, 2730 flow. Second operand 10 states and 225 transitions. [2024-06-21 18:18:29,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 300 transitions, 3422 flow [2024-06-21 18:18:35,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 300 transitions, 3204 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-21 18:18:35,463 INFO L231 Difference]: Finished difference. Result has 319 places, 258 transitions, 2541 flow [2024-06-21 18:18:35,463 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} [2024-06-21 18:18:35,463 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 279 predicate places. [2024-06-21 18:18:35,463 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 258 transitions, 2541 flow [2024-06-21 18:18:35,463 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) [2024-06-21 18:18:35,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:35,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:35,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 18:18:35,464 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:18:35,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:35,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1050686607, now seen corresponding path program 2 times [2024-06-21 18:18:35,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:35,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505824655] [2024-06-21 18:18:35,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:35,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:35,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:35,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:35,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505824655] [2024-06-21 18:18:35,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505824655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:35,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:35,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:18:35,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852216013] [2024-06-21 18:18:35,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:35,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:18:35,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:35,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:18:35,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:18:35,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:18:35,613 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) [2024-06-21 18:18:35,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:35,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:18:35,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:36,345 INFO L124 PetriNetUnfolderBase]: 2666/4661 cut-off events. [2024-06-21 18:18:36,345 INFO L125 PetriNetUnfolderBase]: For 821784/821784 co-relation queries the response was YES. [2024-06-21 18:18:36,383 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. [2024-06-21 18:18:36,396 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 238 selfloop transitions, 35 changer transitions 16/296 dead transitions. [2024-06-21 18:18:36,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 296 transitions, 3253 flow [2024-06-21 18:18:36,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:18:36,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:18:36,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 18:18:36,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6593406593406593 [2024-06-21 18:18:36,397 INFO L175 Difference]: Start difference. First operand has 319 places, 258 transitions, 2541 flow. Second operand 7 states and 180 transitions. [2024-06-21 18:18:36,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 296 transitions, 3253 flow [2024-06-21 18:18:39,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 296 transitions, 3144 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-21 18:18:39,958 INFO L231 Difference]: Finished difference. Result has 313 places, 248 transitions, 2396 flow [2024-06-21 18:18:39,958 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} [2024-06-21 18:18:39,958 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 273 predicate places. [2024-06-21 18:18:39,958 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 248 transitions, 2396 flow [2024-06-21 18:18:39,958 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) [2024-06-21 18:18:39,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:39,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:39,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 18:18:39,959 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:18:39,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:39,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1115516175, now seen corresponding path program 3 times [2024-06-21 18:18:39,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:39,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775357970] [2024-06-21 18:18:39,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:39,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:40,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:40,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775357970] [2024-06-21 18:18:40,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775357970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:40,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:40,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:18:40,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620780318] [2024-06-21 18:18:40,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:40,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:18:40,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:40,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:18:40,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:18:40,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:18:40,091 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) [2024-06-21 18:18:40,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:40,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:18:40,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:40,808 INFO L124 PetriNetUnfolderBase]: 2486/4342 cut-off events. [2024-06-21 18:18:40,808 INFO L125 PetriNetUnfolderBase]: For 664900/664900 co-relation queries the response was YES. [2024-06-21 18:18:40,839 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. [2024-06-21 18:18:40,851 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 229 selfloop transitions, 44 changer transitions 7/287 dead transitions. [2024-06-21 18:18:40,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 287 transitions, 3319 flow [2024-06-21 18:18:40,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:18:40,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:18:40,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 18:18:40,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 18:18:40,852 INFO L175 Difference]: Start difference. First operand has 313 places, 248 transitions, 2396 flow. Second operand 8 states and 195 transitions. [2024-06-21 18:18:40,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 287 transitions, 3319 flow [2024-06-21 18:18:44,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 287 transitions, 2964 flow, removed 13 selfloop flow, removed 25 redundant places. [2024-06-21 18:18:44,035 INFO L231 Difference]: Finished difference. Result has 295 places, 246 transitions, 2130 flow [2024-06-21 18:18:44,035 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} [2024-06-21 18:18:44,035 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 255 predicate places. [2024-06-21 18:18:44,035 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 246 transitions, 2130 flow [2024-06-21 18:18:44,036 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) [2024-06-21 18:18:44,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:44,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:44,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 18:18:44,036 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:18:44,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:44,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1095323499, now seen corresponding path program 4 times [2024-06-21 18:18:44,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:44,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345163470] [2024-06-21 18:18:44,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:44,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:44,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:44,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345163470] [2024-06-21 18:18:44,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345163470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:44,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:44,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:18:44,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145714074] [2024-06-21 18:18:44,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:44,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:18:44,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:44,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:18:44,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:18:44,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:18:44,174 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) [2024-06-21 18:18:44,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:44,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:18:44,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:44,805 INFO L124 PetriNetUnfolderBase]: 2254/3942 cut-off events. [2024-06-21 18:18:44,805 INFO L125 PetriNetUnfolderBase]: For 442298/442298 co-relation queries the response was YES. [2024-06-21 18:18:44,838 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. [2024-06-21 18:18:44,849 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 222 selfloop transitions, 40 changer transitions 16/285 dead transitions. [2024-06-21 18:18:44,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 285 transitions, 2818 flow [2024-06-21 18:18:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:18:44,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:18:44,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 18:18:44,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2024-06-21 18:18:44,850 INFO L175 Difference]: Start difference. First operand has 295 places, 246 transitions, 2130 flow. Second operand 8 states and 196 transitions. [2024-06-21 18:18:44,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 285 transitions, 2818 flow [2024-06-21 18:18:47,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 285 transitions, 2643 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 18:18:47,799 INFO L231 Difference]: Finished difference. Result has 292 places, 239 transitions, 1989 flow [2024-06-21 18:18:47,799 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} [2024-06-21 18:18:47,799 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 252 predicate places. [2024-06-21 18:18:47,800 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 239 transitions, 1989 flow [2024-06-21 18:18:47,800 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) [2024-06-21 18:18:47,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:47,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:47,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 18:18:47,800 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:18:47,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:47,801 INFO L85 PathProgramCache]: Analyzing trace with hash -993921679, now seen corresponding path program 5 times [2024-06-21 18:18:47,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:47,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585655777] [2024-06-21 18:18:47,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:47,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:47,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:47,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585655777] [2024-06-21 18:18:47,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585655777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:47,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:47,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:18:47,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399106893] [2024-06-21 18:18:47,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:47,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:18:47,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:47,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:18:47,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:18:47,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:18:47,914 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) [2024-06-21 18:18:47,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:47,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:18:47,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:48,418 INFO L124 PetriNetUnfolderBase]: 2029/3527 cut-off events. [2024-06-21 18:18:48,418 INFO L125 PetriNetUnfolderBase]: For 305080/305080 co-relation queries the response was YES. [2024-06-21 18:18:48,442 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. [2024-06-21 18:18:48,450 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 216 selfloop transitions, 27 changer transitions 30/280 dead transitions. [2024-06-21 18:18:48,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 280 transitions, 2675 flow [2024-06-21 18:18:48,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:18:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:18:48,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-21 18:18:48,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5743589743589743 [2024-06-21 18:18:48,451 INFO L175 Difference]: Start difference. First operand has 292 places, 239 transitions, 1989 flow. Second operand 10 states and 224 transitions. [2024-06-21 18:18:48,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 280 transitions, 2675 flow [2024-06-21 18:18:49,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 280 transitions, 2554 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-21 18:18:49,745 INFO L231 Difference]: Finished difference. Result has 286 places, 225 transitions, 1809 flow [2024-06-21 18:18:49,745 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} [2024-06-21 18:18:49,745 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 246 predicate places. [2024-06-21 18:18:49,745 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 225 transitions, 1809 flow [2024-06-21 18:18:49,745 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) [2024-06-21 18:18:49,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:49,745 INFO 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] [2024-06-21 18:18:49,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 18:18:49,746 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:18:49,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:49,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2134477145, now seen corresponding path program 1 times [2024-06-21 18:18:49,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:49,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977550800] [2024-06-21 18:18:49,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:49,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:49,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:49,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:49,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977550800] [2024-06-21 18:18:49,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977550800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:49,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:49,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:18:49,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189246958] [2024-06-21 18:18:49,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:49,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:18:49,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:49,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:18:49,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:18:49,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:18:49,857 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) [2024-06-21 18:18:49,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:49,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:18:49,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:50,349 INFO L124 PetriNetUnfolderBase]: 2072/3584 cut-off events. [2024-06-21 18:18:50,349 INFO L125 PetriNetUnfolderBase]: For 476635/476635 co-relation queries the response was YES. [2024-06-21 18:18:50,374 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. [2024-06-21 18:18:50,384 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 170 selfloop transitions, 78 changer transitions 16/271 dead transitions. [2024-06-21 18:18:50,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 271 transitions, 2913 flow [2024-06-21 18:18:50,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:18:50,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:18:50,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 18:18:50,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378205128205128 [2024-06-21 18:18:50,385 INFO L175 Difference]: Start difference. First operand has 286 places, 225 transitions, 1809 flow. Second operand 8 states and 199 transitions. [2024-06-21 18:18:50,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 271 transitions, 2913 flow [2024-06-21 18:18:52,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 271 transitions, 2734 flow, removed 33 selfloop flow, removed 14 redundant places. [2024-06-21 18:18:52,812 INFO L231 Difference]: Finished difference. Result has 268 places, 222 transitions, 1808 flow [2024-06-21 18:18:52,812 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} [2024-06-21 18:18:52,812 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 228 predicate places. [2024-06-21 18:18:52,812 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 222 transitions, 1808 flow [2024-06-21 18:18:52,812 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) [2024-06-21 18:18:52,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:52,813 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] [2024-06-21 18:18:52,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 18:18:52,813 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:18:52,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:52,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1387976143, now seen corresponding path program 2 times [2024-06-21 18:18:52,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:52,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661559250] [2024-06-21 18:18:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:52,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:52,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:52,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661559250] [2024-06-21 18:18:52,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661559250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:52,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:52,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:18:52,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536420398] [2024-06-21 18:18:52,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:52,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:18:52,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:52,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:18:52,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:18:52,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:18:52,976 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) [2024-06-21 18:18:52,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:52,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:18:52,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:53,523 INFO L124 PetriNetUnfolderBase]: 2209/3808 cut-off events. [2024-06-21 18:18:53,523 INFO L125 PetriNetUnfolderBase]: For 571394/571394 co-relation queries the response was YES. [2024-06-21 18:18:53,548 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. [2024-06-21 18:18:53,559 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 166 selfloop transitions, 90 changer transitions 8/271 dead transitions. [2024-06-21 18:18:53,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 271 transitions, 2874 flow [2024-06-21 18:18:53,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:18:53,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:18:53,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-21 18:18:53,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-21 18:18:53,560 INFO L175 Difference]: Start difference. First operand has 268 places, 222 transitions, 1808 flow. Second operand 9 states and 221 transitions. [2024-06-21 18:18:53,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 271 transitions, 2874 flow [2024-06-21 18:18:54,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 271 transitions, 2715 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 18:18:54,905 INFO L231 Difference]: Finished difference. Result has 267 places, 220 transitions, 1826 flow [2024-06-21 18:18:54,905 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} [2024-06-21 18:18:54,906 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 227 predicate places. [2024-06-21 18:18:54,906 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 220 transitions, 1826 flow [2024-06-21 18:18:54,906 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) [2024-06-21 18:18:54,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:54,906 INFO 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] [2024-06-21 18:18:54,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 18:18:54,906 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:18:54,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:54,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1388183533, now seen corresponding path program 3 times [2024-06-21 18:18:54,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:54,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675611898] [2024-06-21 18:18:54,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:54,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:54,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:54,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675611898] [2024-06-21 18:18:54,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675611898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:54,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:54,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:18:54,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236944198] [2024-06-21 18:18:54,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:54,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:18:54,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:54,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:18:54,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:18:55,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:18:55,038 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) [2024-06-21 18:18:55,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:55,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:18:55,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:55,530 INFO L124 PetriNetUnfolderBase]: 1990/3419 cut-off events. [2024-06-21 18:18:55,530 INFO L125 PetriNetUnfolderBase]: For 388638/388638 co-relation queries the response was YES. [2024-06-21 18:18:55,554 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. [2024-06-21 18:18:55,564 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 148 selfloop transitions, 87 changer transitions 22/264 dead transitions. [2024-06-21 18:18:55,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 264 transitions, 2668 flow [2024-06-21 18:18:55,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:18:55,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:18:55,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-21 18:18:55,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125356125356125 [2024-06-21 18:18:55,565 INFO L175 Difference]: Start difference. First operand has 267 places, 220 transitions, 1826 flow. Second operand 9 states and 215 transitions. [2024-06-21 18:18:55,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 264 transitions, 2668 flow [2024-06-21 18:18:56,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 264 transitions, 2481 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:18:56,925 INFO L231 Difference]: Finished difference. Result has 266 places, 216 transitions, 1778 flow [2024-06-21 18:18:56,925 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} [2024-06-21 18:18:56,925 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 226 predicate places. [2024-06-21 18:18:56,926 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 216 transitions, 1778 flow [2024-06-21 18:18:56,926 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) [2024-06-21 18:18:56,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:56,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:18:56,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 18:18:56,926 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:18:56,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:56,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1168984995, now seen corresponding path program 4 times [2024-06-21 18:18:56,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:56,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036135378] [2024-06-21 18:18:56,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:56,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:57,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:57,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036135378] [2024-06-21 18:18:57,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036135378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:57,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:57,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:18:57,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53885202] [2024-06-21 18:18:57,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:57,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:18:57,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:57,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:18:57,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:18:57,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:18:57,063 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) [2024-06-21 18:18:57,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:57,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:18:57,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:57,554 INFO L124 PetriNetUnfolderBase]: 2062/3557 cut-off events. [2024-06-21 18:18:57,554 INFO L125 PetriNetUnfolderBase]: For 482475/482475 co-relation queries the response was YES. [2024-06-21 18:18:57,577 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. [2024-06-21 18:18:57,586 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 155 selfloop transitions, 81 changer transitions 10/253 dead transitions. [2024-06-21 18:18:57,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 253 transitions, 2576 flow [2024-06-21 18:18:57,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:18:57,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:18:57,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 243 transitions. [2024-06-21 18:18:57,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5664335664335665 [2024-06-21 18:18:57,587 INFO L175 Difference]: Start difference. First operand has 266 places, 216 transitions, 1778 flow. Second operand 11 states and 243 transitions. [2024-06-21 18:18:57,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 253 transitions, 2576 flow [2024-06-21 18:18:58,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 253 transitions, 2388 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 18:18:58,789 INFO L231 Difference]: Finished difference. Result has 261 places, 213 transitions, 1733 flow [2024-06-21 18:18:58,789 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} [2024-06-21 18:18:58,790 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 221 predicate places. [2024-06-21 18:18:58,790 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 213 transitions, 1733 flow [2024-06-21 18:18:58,790 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) [2024-06-21 18:18:58,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:18:58,790 INFO 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] [2024-06-21 18:18:58,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 18:18:58,790 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:18:58,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:18:58,791 INFO L85 PathProgramCache]: Analyzing trace with hash -715770155, now seen corresponding path program 5 times [2024-06-21 18:18:58,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:18:58,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864439251] [2024-06-21 18:18:58,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:18:58,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:18:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:18:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:18:58,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:18:58,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864439251] [2024-06-21 18:18:58,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864439251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:18:58,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:18:58,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:18:58,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364566117] [2024-06-21 18:18:58,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:18:58,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:18:58,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:18:58,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:18:58,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:18:58,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:18:58,926 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) [2024-06-21 18:18:58,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:18:58,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:18:58,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:18:59,369 INFO L124 PetriNetUnfolderBase]: 1911/3296 cut-off events. [2024-06-21 18:18:59,369 INFO L125 PetriNetUnfolderBase]: For 370030/370030 co-relation queries the response was YES. [2024-06-21 18:18:59,390 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. [2024-06-21 18:18:59,398 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 146 selfloop transitions, 76 changer transitions 14/243 dead transitions. [2024-06-21 18:18:59,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 243 transitions, 2297 flow [2024-06-21 18:18:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:18:59,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:18:59,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-21 18:18:59,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501165501165501 [2024-06-21 18:18:59,406 INFO L175 Difference]: Start difference. First operand has 261 places, 213 transitions, 1733 flow. Second operand 11 states and 236 transitions. [2024-06-21 18:18:59,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 243 transitions, 2297 flow [2024-06-21 18:19:00,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 243 transitions, 2137 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 18:19:00,321 INFO L231 Difference]: Finished difference. Result has 260 places, 208 transitions, 1696 flow [2024-06-21 18:19:00,321 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} [2024-06-21 18:19:00,321 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 220 predicate places. [2024-06-21 18:19:00,322 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 208 transitions, 1696 flow [2024-06-21 18:19:00,322 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) [2024-06-21 18:19:00,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:00,322 INFO 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] [2024-06-21 18:19:00,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 18:19:00,322 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:00,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:00,323 INFO L85 PathProgramCache]: Analyzing trace with hash -968191699, now seen corresponding path program 6 times [2024-06-21 18:19:00,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:00,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512814429] [2024-06-21 18:19:00,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:00,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:00,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:00,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512814429] [2024-06-21 18:19:00,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512814429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:00,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:00,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:00,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539088748] [2024-06-21 18:19:00,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:00,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:00,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:00,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:00,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:00,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:00,455 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) [2024-06-21 18:19:00,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:00,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:00,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:00,930 INFO L124 PetriNetUnfolderBase]: 2070/3581 cut-off events. [2024-06-21 18:19:00,930 INFO L125 PetriNetUnfolderBase]: For 487247/487247 co-relation queries the response was YES. [2024-06-21 18:19:00,952 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. [2024-06-21 18:19:00,961 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 158 selfloop transitions, 76 changer transitions 8/249 dead transitions. [2024-06-21 18:19:00,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 249 transitions, 2670 flow [2024-06-21 18:19:00,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:19:00,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:19:00,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-21 18:19:00,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5871794871794872 [2024-06-21 18:19:00,962 INFO L175 Difference]: Start difference. First operand has 260 places, 208 transitions, 1696 flow. Second operand 10 states and 229 transitions. [2024-06-21 18:19:00,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 249 transitions, 2670 flow [2024-06-21 18:19:02,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 249 transitions, 2500 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-21 18:19:02,206 INFO L231 Difference]: Finished difference. Result has 255 places, 206 transitions, 1679 flow [2024-06-21 18:19:02,206 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} [2024-06-21 18:19:02,206 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 215 predicate places. [2024-06-21 18:19:02,206 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 206 transitions, 1679 flow [2024-06-21 18:19:02,206 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) [2024-06-21 18:19:02,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:02,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:02,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 18:19:02,207 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:02,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:02,207 INFO L85 PathProgramCache]: Analyzing trace with hash 719437805, now seen corresponding path program 7 times [2024-06-21 18:19:02,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:02,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402967567] [2024-06-21 18:19:02,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:02,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:02,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:02,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402967567] [2024-06-21 18:19:02,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402967567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:02,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:02,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:02,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442370042] [2024-06-21 18:19:02,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:02,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:02,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:02,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:02,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:02,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:02,390 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) [2024-06-21 18:19:02,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:02,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:02,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:02,874 INFO L124 PetriNetUnfolderBase]: 1965/3406 cut-off events. [2024-06-21 18:19:02,874 INFO L125 PetriNetUnfolderBase]: For 400745/400745 co-relation queries the response was YES. [2024-06-21 18:19:02,894 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. [2024-06-21 18:19:02,903 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 157 selfloop transitions, 75 changer transitions 9/248 dead transitions. [2024-06-21 18:19:02,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 248 transitions, 2651 flow [2024-06-21 18:19:02,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:19:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:19:02,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-21 18:19:02,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5871794871794872 [2024-06-21 18:19:02,904 INFO L175 Difference]: Start difference. First operand has 255 places, 206 transitions, 1679 flow. Second operand 10 states and 229 transitions. [2024-06-21 18:19:02,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 248 transitions, 2651 flow [2024-06-21 18:19:03,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 248 transitions, 2488 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 18:19:03,951 INFO L231 Difference]: Finished difference. Result has 254 places, 203 transitions, 1650 flow [2024-06-21 18:19:03,951 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} [2024-06-21 18:19:03,952 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 214 predicate places. [2024-06-21 18:19:03,952 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 203 transitions, 1650 flow [2024-06-21 18:19:03,952 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) [2024-06-21 18:19:03,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:03,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:03,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 18:19:03,952 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:03,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:03,952 INFO L85 PathProgramCache]: Analyzing trace with hash 808092845, now seen corresponding path program 8 times [2024-06-21 18:19:03,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:03,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247680130] [2024-06-21 18:19:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:03,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:04,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:04,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247680130] [2024-06-21 18:19:04,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247680130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:04,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:04,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:04,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645792838] [2024-06-21 18:19:04,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:04,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:04,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:04,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:04,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:04,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:04,086 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) [2024-06-21 18:19:04,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:04,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:04,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:04,534 INFO L124 PetriNetUnfolderBase]: 1840/3187 cut-off events. [2024-06-21 18:19:04,534 INFO L125 PetriNetUnfolderBase]: For 329680/329680 co-relation queries the response was YES. [2024-06-21 18:19:04,554 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. [2024-06-21 18:19:04,564 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 141 selfloop transitions, 71 changer transitions 12/231 dead transitions. [2024-06-21 18:19:04,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 231 transitions, 2186 flow [2024-06-21 18:19:04,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:04,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-21 18:19:04,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698005698005698 [2024-06-21 18:19:04,565 INFO L175 Difference]: Start difference. First operand has 254 places, 203 transitions, 1650 flow. Second operand 9 states and 200 transitions. [2024-06-21 18:19:04,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 231 transitions, 2186 flow [2024-06-21 18:19:05,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 231 transitions, 2031 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 18:19:05,701 INFO L231 Difference]: Finished difference. Result has 249 places, 199 transitions, 1614 flow [2024-06-21 18:19:05,701 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} [2024-06-21 18:19:05,701 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 209 predicate places. [2024-06-21 18:19:05,701 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 199 transitions, 1614 flow [2024-06-21 18:19:05,702 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) [2024-06-21 18:19:05,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:05,702 INFO 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] [2024-06-21 18:19:05,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 18:19:05,703 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:05,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:05,703 INFO L85 PathProgramCache]: Analyzing trace with hash -966317749, now seen corresponding path program 9 times [2024-06-21 18:19:05,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:05,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947614175] [2024-06-21 18:19:05,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:05,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:05,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:05,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947614175] [2024-06-21 18:19:05,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947614175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:05,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:05,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:05,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066293760] [2024-06-21 18:19:05,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:05,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:05,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:05,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:05,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:05,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:05,841 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) [2024-06-21 18:19:05,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:05,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:05,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:06,227 INFO L124 PetriNetUnfolderBase]: 1711/2978 cut-off events. [2024-06-21 18:19:06,227 INFO L125 PetriNetUnfolderBase]: For 227795/227795 co-relation queries the response was YES. [2024-06-21 18:19:06,244 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. [2024-06-21 18:19:06,251 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 132 selfloop transitions, 66 changer transitions 26/231 dead transitions. [2024-06-21 18:19:06,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 231 transitions, 2172 flow [2024-06-21 18:19:06,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:06,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:06,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-21 18:19:06,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5726495726495726 [2024-06-21 18:19:06,252 INFO L175 Difference]: Start difference. First operand has 249 places, 199 transitions, 1614 flow. Second operand 9 states and 201 transitions. [2024-06-21 18:19:06,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 231 transitions, 2172 flow [2024-06-21 18:19:07,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 231 transitions, 2026 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:07,054 INFO L231 Difference]: Finished difference. Result has 246 places, 193 transitions, 1553 flow [2024-06-21 18:19:07,054 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} [2024-06-21 18:19:07,054 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 206 predicate places. [2024-06-21 18:19:07,054 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 193 transitions, 1553 flow [2024-06-21 18:19:07,054 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) [2024-06-21 18:19:07,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:07,054 INFO 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] [2024-06-21 18:19:07,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 18:19:07,055 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:07,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:07,055 INFO L85 PathProgramCache]: Analyzing trace with hash 697036003, now seen corresponding path program 10 times [2024-06-21 18:19:07,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:07,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775138806] [2024-06-21 18:19:07,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:07,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:07,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:07,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775138806] [2024-06-21 18:19:07,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775138806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:07,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:07,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:07,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374763228] [2024-06-21 18:19:07,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:07,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:07,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:07,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:07,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:07,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:07,189 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) [2024-06-21 18:19:07,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:07,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:07,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:07,572 INFO L124 PetriNetUnfolderBase]: 1678/2899 cut-off events. [2024-06-21 18:19:07,573 INFO L125 PetriNetUnfolderBase]: For 229481/229481 co-relation queries the response was YES. [2024-06-21 18:19:07,588 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. [2024-06-21 18:19:07,595 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 139 selfloop transitions, 60 changer transitions 12/218 dead transitions. [2024-06-21 18:19:07,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 218 transitions, 2055 flow [2024-06-21 18:19:07,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:07,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:07,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-21 18:19:07,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669515669515669 [2024-06-21 18:19:07,595 INFO L175 Difference]: Start difference. First operand has 246 places, 193 transitions, 1553 flow. Second operand 9 states and 199 transitions. [2024-06-21 18:19:07,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 218 transitions, 2055 flow [2024-06-21 18:19:08,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 218 transitions, 1906 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 18:19:08,224 INFO L231 Difference]: Finished difference. Result has 237 places, 189 transitions, 1504 flow [2024-06-21 18:19:08,224 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} [2024-06-21 18:19:08,224 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 197 predicate places. [2024-06-21 18:19:08,224 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 189 transitions, 1504 flow [2024-06-21 18:19:08,224 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) [2024-06-21 18:19:08,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:08,224 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, 1] [2024-06-21 18:19:08,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 18:19:08,225 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:08,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:08,225 INFO L85 PathProgramCache]: Analyzing trace with hash 686287097, now seen corresponding path program 1 times [2024-06-21 18:19:08,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:08,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754218309] [2024-06-21 18:19:08,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:08,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:08,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:08,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754218309] [2024-06-21 18:19:08,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754218309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:08,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:08,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:19:08,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442389439] [2024-06-21 18:19:08,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:08,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:19:08,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:08,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:19:08,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:19:08,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:08,339 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) [2024-06-21 18:19:08,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:08,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:08,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:08,754 INFO L124 PetriNetUnfolderBase]: 1871/3256 cut-off events. [2024-06-21 18:19:08,755 INFO L125 PetriNetUnfolderBase]: For 331716/331716 co-relation queries the response was YES. [2024-06-21 18:19:08,773 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. [2024-06-21 18:19:08,782 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 134 selfloop transitions, 74 changer transitions 17/232 dead transitions. [2024-06-21 18:19:08,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 232 transitions, 2422 flow [2024-06-21 18:19:08,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:19:08,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:19:08,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 18:19:08,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2024-06-21 18:19:08,783 INFO L175 Difference]: Start difference. First operand has 237 places, 189 transitions, 1504 flow. Second operand 8 states and 196 transitions. [2024-06-21 18:19:08,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 232 transitions, 2422 flow [2024-06-21 18:19:09,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 232 transitions, 2290 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:09,492 INFO L231 Difference]: Finished difference. Result has 234 places, 185 transitions, 1499 flow [2024-06-21 18:19:09,492 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} [2024-06-21 18:19:09,492 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 194 predicate places. [2024-06-21 18:19:09,492 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 185 transitions, 1499 flow [2024-06-21 18:19:09,492 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) [2024-06-21 18:19:09,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:09,492 INFO 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] [2024-06-21 18:19:09,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 18:19:09,493 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:09,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:09,493 INFO L85 PathProgramCache]: Analyzing trace with hash 490896727, now seen corresponding path program 2 times [2024-06-21 18:19:09,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:09,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495031645] [2024-06-21 18:19:09,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:09,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:09,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:09,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495031645] [2024-06-21 18:19:09,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495031645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:09,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:09,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:09,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105805496] [2024-06-21 18:19:09,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:09,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:09,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:09,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:09,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:09,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:09,629 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) [2024-06-21 18:19:09,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:09,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:09,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:10,082 INFO L124 PetriNetUnfolderBase]: 1871/3256 cut-off events. [2024-06-21 18:19:10,082 INFO L125 PetriNetUnfolderBase]: For 375757/375757 co-relation queries the response was YES. [2024-06-21 18:19:10,102 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. [2024-06-21 18:19:10,111 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 143 selfloop transitions, 69 changer transitions 12/231 dead transitions. [2024-06-21 18:19:10,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 231 transitions, 2259 flow [2024-06-21 18:19:10,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:19:10,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:19:10,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-21 18:19:10,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-06-21 18:19:10,112 INFO L175 Difference]: Start difference. First operand has 234 places, 185 transitions, 1499 flow. Second operand 11 states and 247 transitions. [2024-06-21 18:19:10,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 231 transitions, 2259 flow [2024-06-21 18:19:10,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 231 transitions, 2123 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 18:19:10,894 INFO L231 Difference]: Finished difference. Result has 235 places, 183 transitions, 1495 flow [2024-06-21 18:19:10,894 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} [2024-06-21 18:19:10,894 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 195 predicate places. [2024-06-21 18:19:10,894 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 183 transitions, 1495 flow [2024-06-21 18:19:10,894 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) [2024-06-21 18:19:10,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:10,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:10,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 18:19:10,895 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:10,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:10,895 INFO L85 PathProgramCache]: Analyzing trace with hash 326439177, now seen corresponding path program 3 times [2024-06-21 18:19:10,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:10,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260236050] [2024-06-21 18:19:10,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:10,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:10,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:10,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260236050] [2024-06-21 18:19:10,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260236050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:10,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:10,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:10,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305102614] [2024-06-21 18:19:10,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:10,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:10,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:10,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:10,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:11,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:11,046 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) [2024-06-21 18:19:11,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:11,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:11,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:11,421 INFO L124 PetriNetUnfolderBase]: 1652/2867 cut-off events. [2024-06-21 18:19:11,421 INFO L125 PetriNetUnfolderBase]: For 247058/247058 co-relation queries the response was YES. [2024-06-21 18:19:11,437 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. [2024-06-21 18:19:11,445 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 127 selfloop transitions, 65 changer transitions 19/218 dead transitions. [2024-06-21 18:19:11,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 218 transitions, 2033 flow [2024-06-21 18:19:11,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:11,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:11,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-21 18:19:11,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5868945868945868 [2024-06-21 18:19:11,446 INFO L175 Difference]: Start difference. First operand has 235 places, 183 transitions, 1495 flow. Second operand 9 states and 206 transitions. [2024-06-21 18:19:11,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 218 transitions, 2033 flow [2024-06-21 18:19:12,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 218 transitions, 1892 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 18:19:12,010 INFO L231 Difference]: Finished difference. Result has 232 places, 179 transitions, 1452 flow [2024-06-21 18:19:12,010 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} [2024-06-21 18:19:12,010 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 192 predicate places. [2024-06-21 18:19:12,010 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 179 transitions, 1452 flow [2024-06-21 18:19:12,011 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) [2024-06-21 18:19:12,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:12,011 INFO 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] [2024-06-21 18:19:12,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 18:19:12,011 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:12,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:12,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1064106429, now seen corresponding path program 4 times [2024-06-21 18:19:12,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:12,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436121970] [2024-06-21 18:19:12,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:12,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:12,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:12,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:12,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436121970] [2024-06-21 18:19:12,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436121970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:12,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:12,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:12,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525227443] [2024-06-21 18:19:12,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:12,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:12,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:12,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:12,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:12,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:12,163 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) [2024-06-21 18:19:12,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:12,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:12,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:12,547 INFO L124 PetriNetUnfolderBase]: 1763/3044 cut-off events. [2024-06-21 18:19:12,547 INFO L125 PetriNetUnfolderBase]: For 329778/329778 co-relation queries the response was YES. [2024-06-21 18:19:12,564 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. [2024-06-21 18:19:12,572 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 137 selfloop transitions, 56 changer transitions 11/211 dead transitions. [2024-06-21 18:19:12,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 211 transitions, 2124 flow [2024-06-21 18:19:12,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:12,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:12,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-21 18:19:12,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5783475783475783 [2024-06-21 18:19:12,573 INFO L175 Difference]: Start difference. First operand has 232 places, 179 transitions, 1452 flow. Second operand 9 states and 203 transitions. [2024-06-21 18:19:12,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 211 transitions, 2124 flow [2024-06-21 18:19:13,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 211 transitions, 1980 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 18:19:13,061 INFO L231 Difference]: Finished difference. Result has 225 places, 175 transitions, 1401 flow [2024-06-21 18:19:13,061 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} [2024-06-21 18:19:13,061 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 185 predicate places. [2024-06-21 18:19:13,061 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 175 transitions, 1401 flow [2024-06-21 18:19:13,061 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) [2024-06-21 18:19:13,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:13,062 INFO 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] [2024-06-21 18:19:13,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 18:19:13,062 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:13,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:13,062 INFO L85 PathProgramCache]: Analyzing trace with hash 549097987, now seen corresponding path program 5 times [2024-06-21 18:19:13,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:13,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858550790] [2024-06-21 18:19:13,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:13,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:13,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:13,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858550790] [2024-06-21 18:19:13,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858550790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:13,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:13,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:13,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288717208] [2024-06-21 18:19:13,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:13,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:13,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:13,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:13,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:13,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:13,195 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) [2024-06-21 18:19:13,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:13,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:13,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:13,540 INFO L124 PetriNetUnfolderBase]: 1611/2794 cut-off events. [2024-06-21 18:19:13,540 INFO L125 PetriNetUnfolderBase]: For 249604/249604 co-relation queries the response was YES. [2024-06-21 18:19:13,554 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. [2024-06-21 18:19:13,559 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 128 selfloop transitions, 53 changer transitions 12/200 dead transitions. [2024-06-21 18:19:13,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 200 transitions, 1867 flow [2024-06-21 18:19:13,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:13,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:13,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-21 18:19:13,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584045584045584 [2024-06-21 18:19:13,560 INFO L175 Difference]: Start difference. First operand has 225 places, 175 transitions, 1401 flow. Second operand 9 states and 196 transitions. [2024-06-21 18:19:13,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 200 transitions, 1867 flow [2024-06-21 18:19:14,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 200 transitions, 1752 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 18:19:14,097 INFO L231 Difference]: Finished difference. Result has 222 places, 171 transitions, 1371 flow [2024-06-21 18:19:14,097 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} [2024-06-21 18:19:14,097 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 182 predicate places. [2024-06-21 18:19:14,097 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 171 transitions, 1371 flow [2024-06-21 18:19:14,098 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) [2024-06-21 18:19:14,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:14,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:14,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 18:19:14,098 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:14,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:14,098 INFO L85 PathProgramCache]: Analyzing trace with hash 300416957, now seen corresponding path program 6 times [2024-06-21 18:19:14,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:14,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506068870] [2024-06-21 18:19:14,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:14,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:14,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:14,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506068870] [2024-06-21 18:19:14,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506068870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:14,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:14,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:14,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095571641] [2024-06-21 18:19:14,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:14,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:14,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:14,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:14,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:14,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:14,235 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) [2024-06-21 18:19:14,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:14,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:14,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:14,574 INFO L124 PetriNetUnfolderBase]: 1596/2787 cut-off events. [2024-06-21 18:19:14,574 INFO L125 PetriNetUnfolderBase]: For 230840/230840 co-relation queries the response was YES. [2024-06-21 18:19:14,588 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. [2024-06-21 18:19:14,594 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 126 selfloop transitions, 50 changer transitions 17/200 dead transitions. [2024-06-21 18:19:14,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 200 transitions, 1861 flow [2024-06-21 18:19:14,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:14,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-21 18:19:14,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612535612535613 [2024-06-21 18:19:14,595 INFO L175 Difference]: Start difference. First operand has 222 places, 171 transitions, 1371 flow. Second operand 9 states and 197 transitions. [2024-06-21 18:19:14,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 200 transitions, 1861 flow [2024-06-21 18:19:15,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 200 transitions, 1751 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:15,035 INFO L231 Difference]: Finished difference. Result has 219 places, 167 transitions, 1336 flow [2024-06-21 18:19:15,035 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} [2024-06-21 18:19:15,035 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 179 predicate places. [2024-06-21 18:19:15,035 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 167 transitions, 1336 flow [2024-06-21 18:19:15,035 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) [2024-06-21 18:19:15,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:15,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:15,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 18:19:15,036 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:15,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:15,036 INFO L85 PathProgramCache]: Analyzing trace with hash 295832987, now seen corresponding path program 7 times [2024-06-21 18:19:15,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:15,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052043762] [2024-06-21 18:19:15,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:15,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:15,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:15,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052043762] [2024-06-21 18:19:15,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052043762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:15,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:15,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:15,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537856114] [2024-06-21 18:19:15,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:15,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:15,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:15,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:15,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:15,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:15,187 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) [2024-06-21 18:19:15,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:15,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:15,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:15,531 INFO L124 PetriNetUnfolderBase]: 1624/2831 cut-off events. [2024-06-21 18:19:15,531 INFO L125 PetriNetUnfolderBase]: For 252705/252705 co-relation queries the response was YES. [2024-06-21 18:19:15,546 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. [2024-06-21 18:19:15,553 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 134 selfloop transitions, 51 changer transitions 8/200 dead transitions. [2024-06-21 18:19:15,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 200 transitions, 1968 flow [2024-06-21 18:19:15,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:15,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:15,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-21 18:19:15,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698005698005698 [2024-06-21 18:19:15,554 INFO L175 Difference]: Start difference. First operand has 219 places, 167 transitions, 1336 flow. Second operand 9 states and 200 transitions. [2024-06-21 18:19:15,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 200 transitions, 1968 flow [2024-06-21 18:19:16,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 200 transitions, 1856 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:16,052 INFO L231 Difference]: Finished difference. Result has 215 places, 165 transitions, 1321 flow [2024-06-21 18:19:16,052 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} [2024-06-21 18:19:16,052 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 175 predicate places. [2024-06-21 18:19:16,052 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 165 transitions, 1321 flow [2024-06-21 18:19:16,052 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) [2024-06-21 18:19:16,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:16,053 INFO 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] [2024-06-21 18:19:16,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 18:19:16,053 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:16,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:16,053 INFO L85 PathProgramCache]: Analyzing trace with hash 384531627, now seen corresponding path program 8 times [2024-06-21 18:19:16,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:16,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801732554] [2024-06-21 18:19:16,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:16,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:16,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:16,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801732554] [2024-06-21 18:19:16,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801732554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:16,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:16,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:16,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451753673] [2024-06-21 18:19:16,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:16,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:16,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:16,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:16,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:16,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:16,197 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) [2024-06-21 18:19:16,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:16,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:16,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:16,529 INFO L124 PetriNetUnfolderBase]: 1519/2658 cut-off events. [2024-06-21 18:19:16,529 INFO L125 PetriNetUnfolderBase]: For 197374/197374 co-relation queries the response was YES. [2024-06-21 18:19:16,543 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. [2024-06-21 18:19:16,549 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 118 selfloop transitions, 47 changer transitions 21/193 dead transitions. [2024-06-21 18:19:16,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 193 transitions, 1777 flow [2024-06-21 18:19:16,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:16,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-21 18:19:16,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527065527065527 [2024-06-21 18:19:16,550 INFO L175 Difference]: Start difference. First operand has 215 places, 165 transitions, 1321 flow. Second operand 9 states and 194 transitions. [2024-06-21 18:19:16,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 193 transitions, 1777 flow [2024-06-21 18:19:16,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 193 transitions, 1672 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:16,978 INFO L231 Difference]: Finished difference. Result has 214 places, 160 transitions, 1269 flow [2024-06-21 18:19:16,978 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} [2024-06-21 18:19:16,978 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 174 predicate places. [2024-06-21 18:19:16,978 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 160 transitions, 1269 flow [2024-06-21 18:19:16,979 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) [2024-06-21 18:19:16,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:16,979 INFO 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] [2024-06-21 18:19:16,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 18:19:16,979 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:16,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:16,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2097324885, now seen corresponding path program 9 times [2024-06-21 18:19:16,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:16,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55366882] [2024-06-21 18:19:16,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:16,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:17,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:17,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55366882] [2024-06-21 18:19:17,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55366882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:17,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:17,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:19:17,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98615989] [2024-06-21 18:19:17,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:17,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:19:17,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:17,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:19:17,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:19:17,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:17,107 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) [2024-06-21 18:19:17,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:17,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:17,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:17,439 INFO L124 PetriNetUnfolderBase]: 1650/2886 cut-off events. [2024-06-21 18:19:17,439 INFO L125 PetriNetUnfolderBase]: For 270718/270718 co-relation queries the response was YES. [2024-06-21 18:19:17,453 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. [2024-06-21 18:19:17,461 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 165 selfloop transitions, 13 changer transitions 8/193 dead transitions. [2024-06-21 18:19:17,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 193 transitions, 2021 flow [2024-06-21 18:19:17,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:17,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:17,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-21 18:19:17,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-21 18:19:17,462 INFO L175 Difference]: Start difference. First operand has 214 places, 160 transitions, 1269 flow. Second operand 9 states and 195 transitions. [2024-06-21 18:19:17,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 193 transitions, 2021 flow [2024-06-21 18:19:17,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 193 transitions, 1901 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:17,872 INFO L231 Difference]: Finished difference. Result has 206 places, 158 transitions, 1181 flow [2024-06-21 18:19:17,872 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} [2024-06-21 18:19:17,872 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 166 predicate places. [2024-06-21 18:19:17,872 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 158 transitions, 1181 flow [2024-06-21 18:19:17,872 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) [2024-06-21 18:19:17,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:17,872 INFO 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] [2024-06-21 18:19:17,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 18:19:17,873 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:17,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:17,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1831896833, now seen corresponding path program 10 times [2024-06-21 18:19:17,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:17,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213313584] [2024-06-21 18:19:17,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:17,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:17,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:17,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213313584] [2024-06-21 18:19:17,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213313584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:17,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:17,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:19:17,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068158142] [2024-06-21 18:19:17,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:17,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:19:17,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:17,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:19:17,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:19:18,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:18,003 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) [2024-06-21 18:19:18,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:18,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:18,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:18,363 INFO L124 PetriNetUnfolderBase]: 1545/2689 cut-off events. [2024-06-21 18:19:18,363 INFO L125 PetriNetUnfolderBase]: For 211462/211462 co-relation queries the response was YES. [2024-06-21 18:19:18,376 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. [2024-06-21 18:19:18,383 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 159 selfloop transitions, 12 changer transitions 10/188 dead transitions. [2024-06-21 18:19:18,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 188 transitions, 1773 flow [2024-06-21 18:19:18,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:18,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:18,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-21 18:19:18,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470085470085471 [2024-06-21 18:19:18,383 INFO L175 Difference]: Start difference. First operand has 206 places, 158 transitions, 1181 flow. Second operand 9 states and 192 transitions. [2024-06-21 18:19:18,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 188 transitions, 1773 flow [2024-06-21 18:19:18,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 188 transitions, 1740 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:18,952 INFO L231 Difference]: Finished difference. Result has 205 places, 154 transitions, 1146 flow [2024-06-21 18:19:18,952 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} [2024-06-21 18:19:18,952 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 165 predicate places. [2024-06-21 18:19:18,952 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 154 transitions, 1146 flow [2024-06-21 18:19:18,952 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) [2024-06-21 18:19:18,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:18,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:18,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 18:19:18,953 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:18,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:18,953 INFO L85 PathProgramCache]: Analyzing trace with hash 464846019, now seen corresponding path program 11 times [2024-06-21 18:19:18,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:18,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967642321] [2024-06-21 18:19:18,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:18,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:19,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:19,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:19,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967642321] [2024-06-21 18:19:19,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967642321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:19,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:19,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:19:19,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034384972] [2024-06-21 18:19:19,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:19,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:19:19,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:19,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:19:19,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:19:19,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:19,111 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) [2024-06-21 18:19:19,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:19,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:19,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:19,431 INFO L124 PetriNetUnfolderBase]: 1518/2642 cut-off events. [2024-06-21 18:19:19,431 INFO L125 PetriNetUnfolderBase]: For 204301/204301 co-relation queries the response was YES. [2024-06-21 18:19:19,444 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. [2024-06-21 18:19:19,451 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 158 selfloop transitions, 11 changer transitions 8/184 dead transitions. [2024-06-21 18:19:19,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 184 transitions, 1730 flow [2024-06-21 18:19:19,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:19,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:19,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-21 18:19:19,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-21 18:19:19,452 INFO L175 Difference]: Start difference. First operand has 205 places, 154 transitions, 1146 flow. Second operand 9 states and 189 transitions. [2024-06-21 18:19:19,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 184 transitions, 1730 flow [2024-06-21 18:19:19,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 184 transitions, 1702 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:19,846 INFO L231 Difference]: Finished difference. Result has 201 places, 152 transitions, 1122 flow [2024-06-21 18:19:19,846 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} [2024-06-21 18:19:19,846 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 161 predicate places. [2024-06-21 18:19:19,847 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 152 transitions, 1122 flow [2024-06-21 18:19:19,847 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) [2024-06-21 18:19:19,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:19,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:19,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 18:19:19,847 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:19,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:19,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1040802427, now seen corresponding path program 12 times [2024-06-21 18:19:19,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:19,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138157506] [2024-06-21 18:19:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:19,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:19,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:19,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138157506] [2024-06-21 18:19:19,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138157506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:19,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:19,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:19:19,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501948773] [2024-06-21 18:19:19,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:19,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:19:19,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:19,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:19:19,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:19:19,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:19,988 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) [2024-06-21 18:19:19,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:19,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:19,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:20,265 INFO L124 PetriNetUnfolderBase]: 1413/2455 cut-off events. [2024-06-21 18:19:20,265 INFO L125 PetriNetUnfolderBase]: For 169435/169435 co-relation queries the response was YES. [2024-06-21 18:19:20,277 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. [2024-06-21 18:19:20,283 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 138 selfloop transitions, 6 changer transitions 26/177 dead transitions. [2024-06-21 18:19:20,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 177 transitions, 1542 flow [2024-06-21 18:19:20,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:20,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:20,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 18:19:20,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213675213675214 [2024-06-21 18:19:20,284 INFO L175 Difference]: Start difference. First operand has 201 places, 152 transitions, 1122 flow. Second operand 9 states and 183 transitions. [2024-06-21 18:19:20,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 177 transitions, 1542 flow [2024-06-21 18:19:20,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 177 transitions, 1517 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:20,659 INFO L231 Difference]: Finished difference. Result has 200 places, 146 transitions, 1061 flow [2024-06-21 18:19:20,659 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} [2024-06-21 18:19:20,659 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 160 predicate places. [2024-06-21 18:19:20,659 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 146 transitions, 1061 flow [2024-06-21 18:19:20,659 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) [2024-06-21 18:19:20,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:20,660 INFO 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] [2024-06-21 18:19:20,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 18:19:20,660 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:20,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:20,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1802863969, now seen corresponding path program 11 times [2024-06-21 18:19:20,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:20,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776150036] [2024-06-21 18:19:20,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:20,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:20,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:20,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776150036] [2024-06-21 18:19:20,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776150036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:20,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:20,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:20,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682403378] [2024-06-21 18:19:20,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:20,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:20,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:20,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:20,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:20,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:20,799 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) [2024-06-21 18:19:20,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:20,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:20,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:21,156 INFO L124 PetriNetUnfolderBase]: 1459/2520 cut-off events. [2024-06-21 18:19:21,156 INFO L125 PetriNetUnfolderBase]: For 204225/204225 co-relation queries the response was YES. [2024-06-21 18:19:21,174 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. [2024-06-21 18:19:21,182 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 108 selfloop transitions, 60 changer transitions 8/183 dead transitions. [2024-06-21 18:19:21,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 183 transitions, 1671 flow [2024-06-21 18:19:21,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:21,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:21,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-21 18:19:21,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5954415954415955 [2024-06-21 18:19:21,183 INFO L175 Difference]: Start difference. First operand has 200 places, 146 transitions, 1061 flow. Second operand 9 states and 209 transitions. [2024-06-21 18:19:21,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 183 transitions, 1671 flow [2024-06-21 18:19:21,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 183 transitions, 1639 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:21,544 INFO L231 Difference]: Finished difference. Result has 190 places, 144 transitions, 1141 flow [2024-06-21 18:19:21,544 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} [2024-06-21 18:19:21,544 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 150 predicate places. [2024-06-21 18:19:21,544 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 144 transitions, 1141 flow [2024-06-21 18:19:21,544 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) [2024-06-21 18:19:21,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:21,544 INFO 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] [2024-06-21 18:19:21,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 18:19:21,544 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:21,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:21,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1992610195, now seen corresponding path program 12 times [2024-06-21 18:19:21,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:21,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859224620] [2024-06-21 18:19:21,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:21,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:21,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:21,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859224620] [2024-06-21 18:19:21,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859224620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:21,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:21,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:21,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378834794] [2024-06-21 18:19:21,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:21,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:21,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:21,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:21,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:21,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:21,679 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) [2024-06-21 18:19:21,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:21,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:21,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:22,017 INFO L124 PetriNetUnfolderBase]: 1354/2347 cut-off events. [2024-06-21 18:19:22,017 INFO L125 PetriNetUnfolderBase]: For 169469/169469 co-relation queries the response was YES. [2024-06-21 18:19:22,028 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. [2024-06-21 18:19:22,035 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 93 selfloop transitions, 57 changer transitions 19/176 dead transitions. [2024-06-21 18:19:22,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 176 transitions, 1589 flow [2024-06-21 18:19:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:22,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:22,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-21 18:19:22,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5783475783475783 [2024-06-21 18:19:22,036 INFO L175 Difference]: Start difference. First operand has 190 places, 144 transitions, 1141 flow. Second operand 9 states and 203 transitions. [2024-06-21 18:19:22,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 176 transitions, 1589 flow [2024-06-21 18:19:22,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 176 transitions, 1466 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:22,471 INFO L231 Difference]: Finished difference. Result has 189 places, 140 transitions, 1101 flow [2024-06-21 18:19:22,471 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} [2024-06-21 18:19:22,472 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 149 predicate places. [2024-06-21 18:19:22,472 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 140 transitions, 1101 flow [2024-06-21 18:19:22,472 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) [2024-06-21 18:19:22,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:22,472 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, 1] [2024-06-21 18:19:22,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 18:19:22,473 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:22,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:22,473 INFO L85 PathProgramCache]: Analyzing trace with hash -937195189, now seen corresponding path program 13 times [2024-06-21 18:19:22,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:22,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354481083] [2024-06-21 18:19:22,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:22,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:22,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:22,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354481083] [2024-06-21 18:19:22,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354481083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:22,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:22,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:22,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209422513] [2024-06-21 18:19:22,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:22,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:22,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:22,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:22,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:22,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:22,618 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) [2024-06-21 18:19:22,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:22,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:22,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:22,917 INFO L124 PetriNetUnfolderBase]: 1465/2530 cut-off events. [2024-06-21 18:19:22,917 INFO L125 PetriNetUnfolderBase]: For 223830/223830 co-relation queries the response was YES. [2024-06-21 18:19:22,929 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. [2024-06-21 18:19:22,936 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 105 selfloop transitions, 47 changer transitions 10/169 dead transitions. [2024-06-21 18:19:22,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 169 transitions, 1655 flow [2024-06-21 18:19:22,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:22,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:22,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-21 18:19:22,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811965811965812 [2024-06-21 18:19:22,937 INFO L175 Difference]: Start difference. First operand has 189 places, 140 transitions, 1101 flow. Second operand 9 states and 204 transitions. [2024-06-21 18:19:22,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 169 transitions, 1655 flow [2024-06-21 18:19:23,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 169 transitions, 1527 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 18:19:23,319 INFO L231 Difference]: Finished difference. Result has 182 places, 137 transitions, 1053 flow [2024-06-21 18:19:23,319 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} [2024-06-21 18:19:23,319 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 142 predicate places. [2024-06-21 18:19:23,319 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 137 transitions, 1053 flow [2024-06-21 18:19:23,319 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) [2024-06-21 18:19:23,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:23,319 INFO 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] [2024-06-21 18:19:23,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-21 18:19:23,319 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:23,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:23,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1425940669, now seen corresponding path program 14 times [2024-06-21 18:19:23,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:23,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176941536] [2024-06-21 18:19:23,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:23,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:23,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:23,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176941536] [2024-06-21 18:19:23,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176941536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:23,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:23,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:23,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872401245] [2024-06-21 18:19:23,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:23,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:23,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:23,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:23,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:23,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:23,455 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) [2024-06-21 18:19:23,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:23,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:23,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:23,759 INFO L124 PetriNetUnfolderBase]: 1441/2478 cut-off events. [2024-06-21 18:19:23,759 INFO L125 PetriNetUnfolderBase]: For 213827/213827 co-relation queries the response was YES. [2024-06-21 18:19:23,771 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. [2024-06-21 18:19:23,777 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 96 selfloop transitions, 43 changer transitions 13/159 dead transitions. [2024-06-21 18:19:23,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 159 transitions, 1429 flow [2024-06-21 18:19:23,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:23,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:23,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-21 18:19:23,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669515669515669 [2024-06-21 18:19:23,778 INFO L175 Difference]: Start difference. First operand has 182 places, 137 transitions, 1053 flow. Second operand 9 states and 199 transitions. [2024-06-21 18:19:23,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 159 transitions, 1429 flow [2024-06-21 18:19:24,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 159 transitions, 1337 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:24,063 INFO L231 Difference]: Finished difference. Result has 181 places, 132 transitions, 1019 flow [2024-06-21 18:19:24,063 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} [2024-06-21 18:19:24,063 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 141 predicate places. [2024-06-21 18:19:24,063 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 132 transitions, 1019 flow [2024-06-21 18:19:24,064 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) [2024-06-21 18:19:24,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:24,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:24,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-21 18:19:24,064 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:24,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:24,064 INFO L85 PathProgramCache]: Analyzing trace with hash 52015785, now seen corresponding path program 15 times [2024-06-21 18:19:24,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:24,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435978815] [2024-06-21 18:19:24,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:24,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:24,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:24,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435978815] [2024-06-21 18:19:24,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435978815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:24,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:24,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:24,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685590506] [2024-06-21 18:19:24,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:24,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:24,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:24,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:24,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:24,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:24,202 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) [2024-06-21 18:19:24,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:24,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:24,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:24,527 INFO L124 PetriNetUnfolderBase]: 1519/2632 cut-off events. [2024-06-21 18:19:24,527 INFO L125 PetriNetUnfolderBase]: For 234207/234207 co-relation queries the response was YES. [2024-06-21 18:19:24,540 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. [2024-06-21 18:19:24,547 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 108 selfloop transitions, 45 changer transitions 8/168 dead transitions. [2024-06-21 18:19:24,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 168 transitions, 1709 flow [2024-06-21 18:19:24,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:19:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:19:24,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-21 18:19:24,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5794871794871795 [2024-06-21 18:19:24,548 INFO L175 Difference]: Start difference. First operand has 181 places, 132 transitions, 1019 flow. Second operand 10 states and 226 transitions. [2024-06-21 18:19:24,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 168 transitions, 1709 flow [2024-06-21 18:19:24,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 168 transitions, 1605 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 18:19:24,896 INFO L231 Difference]: Finished difference. Result has 178 places, 130 transitions, 1006 flow [2024-06-21 18:19:24,896 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} [2024-06-21 18:19:24,897 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 138 predicate places. [2024-06-21 18:19:24,897 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 130 transitions, 1006 flow [2024-06-21 18:19:24,897 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) [2024-06-21 18:19:24,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:24,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:24,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-21 18:19:24,897 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:24,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:24,897 INFO L85 PathProgramCache]: Analyzing trace with hash -2008103349, now seen corresponding path program 16 times [2024-06-21 18:19:24,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:24,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665040714] [2024-06-21 18:19:24,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:24,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:24,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:24,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665040714] [2024-06-21 18:19:24,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665040714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:24,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:24,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:24,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477711204] [2024-06-21 18:19:24,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:24,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:24,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:24,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:24,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:25,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:25,029 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) [2024-06-21 18:19:25,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:25,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:25,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:25,335 INFO L124 PetriNetUnfolderBase]: 1495/2586 cut-off events. [2024-06-21 18:19:25,335 INFO L125 PetriNetUnfolderBase]: For 219061/219061 co-relation queries the response was YES. [2024-06-21 18:19:25,347 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. [2024-06-21 18:19:25,356 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 100 selfloop transitions, 42 changer transitions 13/162 dead transitions. [2024-06-21 18:19:25,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 162 transitions, 1542 flow [2024-06-21 18:19:25,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:19:25,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:19:25,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-21 18:19:25,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5692307692307692 [2024-06-21 18:19:25,357 INFO L175 Difference]: Start difference. First operand has 178 places, 130 transitions, 1006 flow. Second operand 10 states and 222 transitions. [2024-06-21 18:19:25,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 162 transitions, 1542 flow [2024-06-21 18:19:25,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 162 transitions, 1446 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 18:19:25,711 INFO L231 Difference]: Finished difference. Result has 177 places, 127 transitions, 977 flow [2024-06-21 18:19:25,711 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} [2024-06-21 18:19:25,711 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 137 predicate places. [2024-06-21 18:19:25,711 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 127 transitions, 977 flow [2024-06-21 18:19:25,712 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) [2024-06-21 18:19:25,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:25,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:25,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-21 18:19:25,712 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:25,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:25,712 INFO L85 PathProgramCache]: Analyzing trace with hash 719527195, now seen corresponding path program 17 times [2024-06-21 18:19:25,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:25,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470572876] [2024-06-21 18:19:25,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:25,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:25,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:25,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470572876] [2024-06-21 18:19:25,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470572876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:25,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:25,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:25,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001047521] [2024-06-21 18:19:25,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:25,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:25,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:25,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:25,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:25,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:25,862 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) [2024-06-21 18:19:25,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:25,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:25,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:26,152 INFO L124 PetriNetUnfolderBase]: 1375/2380 cut-off events. [2024-06-21 18:19:26,152 INFO L125 PetriNetUnfolderBase]: For 183634/183634 co-relation queries the response was YES. [2024-06-21 18:19:26,163 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. [2024-06-21 18:19:26,169 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 99 selfloop transitions, 41 changer transitions 10/157 dead transitions. [2024-06-21 18:19:26,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 157 transitions, 1497 flow [2024-06-21 18:19:26,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:19:26,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:19:26,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-21 18:19:26,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.558974358974359 [2024-06-21 18:19:26,170 INFO L175 Difference]: Start difference. First operand has 177 places, 127 transitions, 977 flow. Second operand 10 states and 218 transitions. [2024-06-21 18:19:26,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 157 transitions, 1497 flow [2024-06-21 18:19:26,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 157 transitions, 1406 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 18:19:26,415 INFO L231 Difference]: Finished difference. Result has 174 places, 124 transitions, 953 flow [2024-06-21 18:19:26,415 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} [2024-06-21 18:19:26,415 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 134 predicate places. [2024-06-21 18:19:26,415 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 124 transitions, 953 flow [2024-06-21 18:19:26,415 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) [2024-06-21 18:19:26,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:26,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:26,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-21 18:19:26,416 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:26,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:26,416 INFO L85 PathProgramCache]: Analyzing trace with hash 56430495, now seen corresponding path program 18 times [2024-06-21 18:19:26,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:26,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293020043] [2024-06-21 18:19:26,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:26,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:26,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:26,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293020043] [2024-06-21 18:19:26,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293020043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:26,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:26,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:26,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8374851] [2024-06-21 18:19:26,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:26,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:26,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:26,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:26,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:26,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:26,552 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) [2024-06-21 18:19:26,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:26,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:26,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:26,813 INFO L124 PetriNetUnfolderBase]: 1224/2123 cut-off events. [2024-06-21 18:19:26,813 INFO L125 PetriNetUnfolderBase]: For 136438/136438 co-relation queries the response was YES. [2024-06-21 18:19:26,822 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. [2024-06-21 18:19:26,828 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 85 selfloop transitions, 34 changer transitions 20/146 dead transitions. [2024-06-21 18:19:26,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 146 transitions, 1303 flow [2024-06-21 18:19:26,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:26,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-21 18:19:26,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5498575498575499 [2024-06-21 18:19:26,828 INFO L175 Difference]: Start difference. First operand has 174 places, 124 transitions, 953 flow. Second operand 9 states and 193 transitions. [2024-06-21 18:19:26,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 146 transitions, 1303 flow [2024-06-21 18:19:27,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 146 transitions, 1220 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 18:19:27,086 INFO L231 Difference]: Finished difference. Result has 171 places, 117 transitions, 887 flow [2024-06-21 18:19:27,086 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} [2024-06-21 18:19:27,086 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 131 predicate places. [2024-06-21 18:19:27,086 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 117 transitions, 887 flow [2024-06-21 18:19:27,086 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) [2024-06-21 18:19:27,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:27,087 INFO 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] [2024-06-21 18:19:27,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-21 18:19:27,087 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:27,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:27,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1958135733, now seen corresponding path program 19 times [2024-06-21 18:19:27,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:27,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614335989] [2024-06-21 18:19:27,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:27,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:27,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:27,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614335989] [2024-06-21 18:19:27,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614335989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:27,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:27,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:19:27,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952406143] [2024-06-21 18:19:27,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:27,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:19:27,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:27,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:19:27,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:19:27,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:27,213 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) [2024-06-21 18:19:27,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:27,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:27,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:27,442 INFO L124 PetriNetUnfolderBase]: 1297/2249 cut-off events. [2024-06-21 18:19:27,442 INFO L125 PetriNetUnfolderBase]: For 153224/153224 co-relation queries the response was YES. [2024-06-21 18:19:27,451 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. [2024-06-21 18:19:27,456 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 82 selfloop transitions, 45 changer transitions 16/150 dead transitions. [2024-06-21 18:19:27,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 150 transitions, 1407 flow [2024-06-21 18:19:27,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:19:27,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:19:27,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-21 18:19:27,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801282051282052 [2024-06-21 18:19:27,457 INFO L175 Difference]: Start difference. First operand has 171 places, 117 transitions, 887 flow. Second operand 8 states and 181 transitions. [2024-06-21 18:19:27,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 150 transitions, 1407 flow [2024-06-21 18:19:27,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 150 transitions, 1321 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:27,618 INFO L231 Difference]: Finished difference. Result has 160 places, 114 transitions, 878 flow [2024-06-21 18:19:27,618 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} [2024-06-21 18:19:27,619 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 120 predicate places. [2024-06-21 18:19:27,619 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 114 transitions, 878 flow [2024-06-21 18:19:27,619 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) [2024-06-21 18:19:27,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:27,619 INFO 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] [2024-06-21 18:19:27,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-21 18:19:27,619 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:27,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:27,619 INFO L85 PathProgramCache]: Analyzing trace with hash -602768169, now seen corresponding path program 20 times [2024-06-21 18:19:27,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:27,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926048] [2024-06-21 18:19:27,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:27,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:27,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:27,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926048] [2024-06-21 18:19:27,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:27,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:27,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:27,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108561125] [2024-06-21 18:19:27,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:27,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:27,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:27,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:27,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:27,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:27,757 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) [2024-06-21 18:19:27,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:27,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:27,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:28,055 INFO L124 PetriNetUnfolderBase]: 1307/2273 cut-off events. [2024-06-21 18:19:28,055 INFO L125 PetriNetUnfolderBase]: For 158309/158309 co-relation queries the response was YES. [2024-06-21 18:19:28,063 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. [2024-06-21 18:19:28,069 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 79 selfloop transitions, 60 changer transitions 12/158 dead transitions. [2024-06-21 18:19:28,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 158 transitions, 1446 flow [2024-06-21 18:19:28,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:19:28,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:19:28,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-21 18:19:28,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-21 18:19:28,069 INFO L175 Difference]: Start difference. First operand has 160 places, 114 transitions, 878 flow. Second operand 11 states and 242 transitions. [2024-06-21 18:19:28,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 158 transitions, 1446 flow [2024-06-21 18:19:28,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 158 transitions, 1346 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 18:19:28,251 INFO L231 Difference]: Finished difference. Result has 161 places, 112 transitions, 902 flow [2024-06-21 18:19:28,251 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} [2024-06-21 18:19:28,251 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 121 predicate places. [2024-06-21 18:19:28,251 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 112 transitions, 902 flow [2024-06-21 18:19:28,251 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) [2024-06-21 18:19:28,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:28,251 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] [2024-06-21 18:19:28,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-21 18:19:28,251 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:28,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:28,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1748384415, now seen corresponding path program 21 times [2024-06-21 18:19:28,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:28,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325721277] [2024-06-21 18:19:28,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:28,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:28,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:28,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325721277] [2024-06-21 18:19:28,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325721277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:28,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:28,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:28,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137735132] [2024-06-21 18:19:28,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:28,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:28,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:28,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:28,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:28,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:28,399 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) [2024-06-21 18:19:28,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:28,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:28,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:28,651 INFO L124 PetriNetUnfolderBase]: 1202/2086 cut-off events. [2024-06-21 18:19:28,651 INFO L125 PetriNetUnfolderBase]: For 130733/130733 co-relation queries the response was YES. [2024-06-21 18:19:28,659 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. [2024-06-21 18:19:28,665 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 63 selfloop transitions, 56 changer transitions 19/145 dead transitions. [2024-06-21 18:19:28,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 145 transitions, 1294 flow [2024-06-21 18:19:28,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:28,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:28,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-21 18:19:28,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5726495726495726 [2024-06-21 18:19:28,666 INFO L175 Difference]: Start difference. First operand has 161 places, 112 transitions, 902 flow. Second operand 9 states and 201 transitions. [2024-06-21 18:19:28,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 145 transitions, 1294 flow [2024-06-21 18:19:28,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 145 transitions, 1171 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 18:19:28,809 INFO L231 Difference]: Finished difference. Result has 158 places, 108 transitions, 863 flow [2024-06-21 18:19:28,809 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} [2024-06-21 18:19:28,809 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 118 predicate places. [2024-06-21 18:19:28,809 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 108 transitions, 863 flow [2024-06-21 18:19:28,810 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) [2024-06-21 18:19:28,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:28,810 INFO 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] [2024-06-21 18:19:28,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-21 18:19:28,810 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:28,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:28,810 INFO L85 PathProgramCache]: Analyzing trace with hash 2114951077, now seen corresponding path program 22 times [2024-06-21 18:19:28,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:28,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173102391] [2024-06-21 18:19:28,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:28,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:28,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:28,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173102391] [2024-06-21 18:19:28,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173102391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:28,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:28,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:28,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363140001] [2024-06-21 18:19:28,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:28,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:28,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:28,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:28,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:28,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:28,955 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) [2024-06-21 18:19:28,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:28,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:28,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:29,196 INFO L124 PetriNetUnfolderBase]: 1242/2162 cut-off events. [2024-06-21 18:19:29,196 INFO L125 PetriNetUnfolderBase]: For 145866/145866 co-relation queries the response was YES. [2024-06-21 18:19:29,205 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. [2024-06-21 18:19:29,210 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 76 selfloop transitions, 51 changer transitions 8/142 dead transitions. [2024-06-21 18:19:29,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 142 transitions, 1353 flow [2024-06-21 18:19:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:29,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-21 18:19:29,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5754985754985755 [2024-06-21 18:19:29,211 INFO L175 Difference]: Start difference. First operand has 158 places, 108 transitions, 863 flow. Second operand 9 states and 202 transitions. [2024-06-21 18:19:29,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 142 transitions, 1353 flow [2024-06-21 18:19:29,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 142 transitions, 1227 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 18:19:29,398 INFO L231 Difference]: Finished difference. Result has 151 places, 106 transitions, 835 flow [2024-06-21 18:19:29,398 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} [2024-06-21 18:19:29,398 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 111 predicate places. [2024-06-21 18:19:29,398 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 106 transitions, 835 flow [2024-06-21 18:19:29,398 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) [2024-06-21 18:19:29,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:29,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:29,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-21 18:19:29,398 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:29,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:29,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1846913099, now seen corresponding path program 23 times [2024-06-21 18:19:29,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:29,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920579993] [2024-06-21 18:19:29,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:29,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:29,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:29,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:29,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920579993] [2024-06-21 18:19:29,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920579993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:29,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:29,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:29,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851121375] [2024-06-21 18:19:29,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:29,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:29,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:29,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:29,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:29,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:29,532 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) [2024-06-21 18:19:29,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:29,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:29,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:29,791 INFO L124 PetriNetUnfolderBase]: 1218/2122 cut-off events. [2024-06-21 18:19:29,791 INFO L125 PetriNetUnfolderBase]: For 134140/134140 co-relation queries the response was YES. [2024-06-21 18:19:29,799 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. [2024-06-21 18:19:29,804 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 75 selfloop transitions, 49 changer transitions 13/144 dead transitions. [2024-06-21 18:19:29,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 144 transitions, 1341 flow [2024-06-21 18:19:29,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:19:29,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:19:29,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-21 18:19:29,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-21 18:19:29,805 INFO L175 Difference]: Start difference. First operand has 151 places, 106 transitions, 835 flow. Second operand 10 states and 220 transitions. [2024-06-21 18:19:29,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 144 transitions, 1341 flow [2024-06-21 18:19:29,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 144 transitions, 1233 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:29,976 INFO L231 Difference]: Finished difference. Result has 151 places, 103 transitions, 813 flow [2024-06-21 18:19:29,976 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} [2024-06-21 18:19:29,977 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 111 predicate places. [2024-06-21 18:19:29,977 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 103 transitions, 813 flow [2024-06-21 18:19:29,977 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) [2024-06-21 18:19:29,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:29,977 INFO 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] [2024-06-21 18:19:29,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-21 18:19:29,977 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:29,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:29,978 INFO L85 PathProgramCache]: Analyzing trace with hash -460789055, now seen corresponding path program 24 times [2024-06-21 18:19:29,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:29,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538220929] [2024-06-21 18:19:29,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:29,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:30,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:30,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538220929] [2024-06-21 18:19:30,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538220929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:30,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:30,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:30,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613279254] [2024-06-21 18:19:30,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:30,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:30,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:30,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:30,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:30,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:30,129 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) [2024-06-21 18:19:30,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:30,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:30,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:30,390 INFO L124 PetriNetUnfolderBase]: 1109/1916 cut-off events. [2024-06-21 18:19:30,390 INFO L125 PetriNetUnfolderBase]: For 110808/110808 co-relation queries the response was YES. [2024-06-21 18:19:30,397 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. [2024-06-21 18:19:30,402 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 85 selfloop transitions, 16 changer transitions 24/132 dead transitions. [2024-06-21 18:19:30,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 132 transitions, 1167 flow [2024-06-21 18:19:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:30,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:30,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-21 18:19:30,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-21 18:19:30,404 INFO L175 Difference]: Start difference. First operand has 151 places, 103 transitions, 813 flow. Second operand 9 states and 189 transitions. [2024-06-21 18:19:30,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 132 transitions, 1167 flow [2024-06-21 18:19:30,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 132 transitions, 1064 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 18:19:30,536 INFO L231 Difference]: Finished difference. Result has 147 places, 98 transitions, 701 flow [2024-06-21 18:19:30,536 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} [2024-06-21 18:19:30,536 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 107 predicate places. [2024-06-21 18:19:30,536 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 98 transitions, 701 flow [2024-06-21 18:19:30,537 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) [2024-06-21 18:19:30,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:30,537 INFO 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] [2024-06-21 18:19:30,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-21 18:19:30,537 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:30,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:30,537 INFO L85 PathProgramCache]: Analyzing trace with hash 2029382387, now seen corresponding path program 25 times [2024-06-21 18:19:30,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:30,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092241706] [2024-06-21 18:19:30,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:30,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:30,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:30,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092241706] [2024-06-21 18:19:30,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092241706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:30,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:30,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:30,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52033512] [2024-06-21 18:19:30,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:30,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:30,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:30,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:30,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:30,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:30,678 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) [2024-06-21 18:19:30,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:30,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:30,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:30,931 INFO L124 PetriNetUnfolderBase]: 1281/2212 cut-off events. [2024-06-21 18:19:30,931 INFO L125 PetriNetUnfolderBase]: For 145818/145818 co-relation queries the response was YES. [2024-06-21 18:19:30,939 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. [2024-06-21 18:19:30,945 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 87 selfloop transitions, 16 changer transitions 16/126 dead transitions. [2024-06-21 18:19:30,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 126 transitions, 1131 flow [2024-06-21 18:19:30,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:19:30,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:19:30,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-21 18:19:30,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-21 18:19:30,946 INFO L175 Difference]: Start difference. First operand has 147 places, 98 transitions, 701 flow. Second operand 10 states and 208 transitions. [2024-06-21 18:19:30,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 126 transitions, 1131 flow [2024-06-21 18:19:31,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 126 transitions, 1066 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 18:19:31,053 INFO L231 Difference]: Finished difference. Result has 138 places, 94 transitions, 642 flow [2024-06-21 18:19:31,053 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} [2024-06-21 18:19:31,053 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 98 predicate places. [2024-06-21 18:19:31,053 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 94 transitions, 642 flow [2024-06-21 18:19:31,053 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) [2024-06-21 18:19:31,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:31,053 INFO 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] [2024-06-21 18:19:31,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-21 18:19:31,053 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:31,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:31,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1411134689, now seen corresponding path program 26 times [2024-06-21 18:19:31,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:31,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562104741] [2024-06-21 18:19:31,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:31,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:31,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:31,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:31,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562104741] [2024-06-21 18:19:31,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562104741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:31,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:31,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:31,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594800894] [2024-06-21 18:19:31,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:31,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:31,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:31,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:31,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:31,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:31,193 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) [2024-06-21 18:19:31,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:31,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:31,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:31,401 INFO L124 PetriNetUnfolderBase]: 1102/1897 cut-off events. [2024-06-21 18:19:31,401 INFO L125 PetriNetUnfolderBase]: For 112958/112958 co-relation queries the response was YES. [2024-06-21 18:19:31,408 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. [2024-06-21 18:19:31,412 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 78 selfloop transitions, 13 changer transitions 12/110 dead transitions. [2024-06-21 18:19:31,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 110 transitions, 900 flow [2024-06-21 18:19:31,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:31,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 18:19:31,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50997150997151 [2024-06-21 18:19:31,413 INFO L175 Difference]: Start difference. First operand has 138 places, 94 transitions, 642 flow. Second operand 9 states and 179 transitions. [2024-06-21 18:19:31,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 110 transitions, 900 flow [2024-06-21 18:19:31,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 110 transitions, 860 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 18:19:31,486 INFO L231 Difference]: Finished difference. Result has 134 places, 90 transitions, 607 flow [2024-06-21 18:19:31,486 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} [2024-06-21 18:19:31,486 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 94 predicate places. [2024-06-21 18:19:31,486 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 90 transitions, 607 flow [2024-06-21 18:19:31,486 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) [2024-06-21 18:19:31,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:31,487 INFO 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] [2024-06-21 18:19:31,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-21 18:19:31,487 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:31,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:31,487 INFO L85 PathProgramCache]: Analyzing trace with hash -2142001983, now seen corresponding path program 27 times [2024-06-21 18:19:31,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:31,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543702252] [2024-06-21 18:19:31,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:31,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:31,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:31,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543702252] [2024-06-21 18:19:31,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543702252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:31,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:31,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:31,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407184143] [2024-06-21 18:19:31,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:31,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:31,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:31,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:31,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:31,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:31,617 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) [2024-06-21 18:19:31,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:31,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:31,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:31,854 INFO L124 PetriNetUnfolderBase]: 1168/2035 cut-off events. [2024-06-21 18:19:31,854 INFO L125 PetriNetUnfolderBase]: For 119389/119389 co-relation queries the response was YES. [2024-06-21 18:19:31,862 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. [2024-06-21 18:19:31,867 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 71 selfloop transitions, 27 changer transitions 10/115 dead transitions. [2024-06-21 18:19:31,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 115 transitions, 989 flow [2024-06-21 18:19:31,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:19:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:19:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-21 18:19:31,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5244755244755245 [2024-06-21 18:19:31,868 INFO L175 Difference]: Start difference. First operand has 134 places, 90 transitions, 607 flow. Second operand 11 states and 225 transitions. [2024-06-21 18:19:31,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 115 transitions, 989 flow [2024-06-21 18:19:31,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 115 transitions, 955 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:31,962 INFO L231 Difference]: Finished difference. Result has 134 places, 87 transitions, 613 flow [2024-06-21 18:19:31,962 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} [2024-06-21 18:19:31,962 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 94 predicate places. [2024-06-21 18:19:31,962 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 87 transitions, 613 flow [2024-06-21 18:19:31,962 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) [2024-06-21 18:19:31,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:31,962 INFO 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] [2024-06-21 18:19:31,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-21 18:19:31,962 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:31,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:31,962 INFO L85 PathProgramCache]: Analyzing trace with hash -2142181473, now seen corresponding path program 28 times [2024-06-21 18:19:31,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:31,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998829314] [2024-06-21 18:19:31,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:31,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:32,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:32,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998829314] [2024-06-21 18:19:32,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998829314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:32,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:32,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:32,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87176629] [2024-06-21 18:19:32,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:32,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:32,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:32,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:32,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:32,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:32,090 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) [2024-06-21 18:19:32,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:32,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:32,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:32,370 INFO L124 PetriNetUnfolderBase]: 1144/1987 cut-off events. [2024-06-21 18:19:32,370 INFO L125 PetriNetUnfolderBase]: For 115003/115003 co-relation queries the response was YES. [2024-06-21 18:19:32,376 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. [2024-06-21 18:19:32,380 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 62 selfloop transitions, 22 changer transitions 14/105 dead transitions. [2024-06-21 18:19:32,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 105 transitions, 865 flow [2024-06-21 18:19:32,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:19:32,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:19:32,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-21 18:19:32,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5081585081585082 [2024-06-21 18:19:32,381 INFO L175 Difference]: Start difference. First operand has 134 places, 87 transitions, 613 flow. Second operand 11 states and 218 transitions. [2024-06-21 18:19:32,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 105 transitions, 865 flow [2024-06-21 18:19:32,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 105 transitions, 813 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 18:19:32,487 INFO L231 Difference]: Finished difference. Result has 133 places, 82 transitions, 578 flow [2024-06-21 18:19:32,487 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} [2024-06-21 18:19:32,488 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 93 predicate places. [2024-06-21 18:19:32,488 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 82 transitions, 578 flow [2024-06-21 18:19:32,488 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) [2024-06-21 18:19:32,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:32,488 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, 1] [2024-06-21 18:19:32,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-21 18:19:32,488 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:32,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:32,488 INFO L85 PathProgramCache]: Analyzing trace with hash -736994643, now seen corresponding path program 29 times [2024-06-21 18:19:32,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:32,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890256020] [2024-06-21 18:19:32,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:32,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:32,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:32,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:32,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:32,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890256020] [2024-06-21 18:19:32,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890256020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:32,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:32,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:32,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51820453] [2024-06-21 18:19:32,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:32,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:32,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:32,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:32,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:32,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:32,617 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) [2024-06-21 18:19:32,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:32,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:32,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:32,830 INFO L124 PetriNetUnfolderBase]: 1189/2090 cut-off events. [2024-06-21 18:19:32,830 INFO L125 PetriNetUnfolderBase]: For 115773/115773 co-relation queries the response was YES. [2024-06-21 18:19:32,837 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. [2024-06-21 18:19:32,842 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 74 selfloop transitions, 23 changer transitions 8/112 dead transitions. [2024-06-21 18:19:32,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 112 transitions, 1046 flow [2024-06-21 18:19:32,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:19:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:19:32,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-21 18:19:32,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435897435897435 [2024-06-21 18:19:32,843 INFO L175 Difference]: Start difference. First operand has 133 places, 82 transitions, 578 flow. Second operand 10 states and 212 transitions. [2024-06-21 18:19:32,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 112 transitions, 1046 flow [2024-06-21 18:19:32,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 112 transitions, 984 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-21 18:19:32,926 INFO L231 Difference]: Finished difference. Result has 128 places, 80 transitions, 565 flow [2024-06-21 18:19:32,926 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} [2024-06-21 18:19:32,926 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 88 predicate places. [2024-06-21 18:19:32,926 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 80 transitions, 565 flow [2024-06-21 18:19:32,926 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) [2024-06-21 18:19:32,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:32,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:32,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-21 18:19:32,927 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:32,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:32,927 INFO L85 PathProgramCache]: Analyzing trace with hash -736984413, now seen corresponding path program 30 times [2024-06-21 18:19:32,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:32,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880313271] [2024-06-21 18:19:32,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:32,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:33,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:33,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880313271] [2024-06-21 18:19:33,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880313271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:33,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:33,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:33,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272978262] [2024-06-21 18:19:33,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:33,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:33,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:33,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:33,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:33,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:33,063 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) [2024-06-21 18:19:33,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:33,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:33,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:33,283 INFO L124 PetriNetUnfolderBase]: 1084/1903 cut-off events. [2024-06-21 18:19:33,283 INFO L125 PetriNetUnfolderBase]: For 92662/92662 co-relation queries the response was YES. [2024-06-21 18:19:33,289 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. [2024-06-21 18:19:33,294 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 73 selfloop transitions, 21 changer transitions 9/110 dead transitions. [2024-06-21 18:19:33,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 110 transitions, 1021 flow [2024-06-21 18:19:33,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:19:33,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:19:33,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-21 18:19:33,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435897435897435 [2024-06-21 18:19:33,295 INFO L175 Difference]: Start difference. First operand has 128 places, 80 transitions, 565 flow. Second operand 10 states and 212 transitions. [2024-06-21 18:19:33,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 110 transitions, 1021 flow [2024-06-21 18:19:33,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 110 transitions, 965 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 18:19:33,382 INFO L231 Difference]: Finished difference. Result has 127 places, 77 transitions, 541 flow [2024-06-21 18:19:33,382 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} [2024-06-21 18:19:33,383 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 87 predicate places. [2024-06-21 18:19:33,383 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 77 transitions, 541 flow [2024-06-21 18:19:33,383 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) [2024-06-21 18:19:33,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:33,383 INFO 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] [2024-06-21 18:19:33,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-21 18:19:33,383 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:33,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:33,383 INFO L85 PathProgramCache]: Analyzing trace with hash 891847361, now seen corresponding path program 31 times [2024-06-21 18:19:33,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:33,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561154760] [2024-06-21 18:19:33,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:33,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:33,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:33,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561154760] [2024-06-21 18:19:33,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561154760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:33,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:33,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:33,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233675055] [2024-06-21 18:19:33,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:33,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:33,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:33,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:33,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:33,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:33,523 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) [2024-06-21 18:19:33,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:33,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:33,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:33,750 INFO L124 PetriNetUnfolderBase]: 1058/1853 cut-off events. [2024-06-21 18:19:33,750 INFO L125 PetriNetUnfolderBase]: For 87701/87701 co-relation queries the response was YES. [2024-06-21 18:19:33,756 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. [2024-06-21 18:19:33,760 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 64 selfloop transitions, 11 changer transitions 17/99 dead transitions. [2024-06-21 18:19:33,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 99 transitions, 799 flow [2024-06-21 18:19:33,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:33,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:33,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 18:19:33,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-21 18:19:33,761 INFO L175 Difference]: Start difference. First operand has 127 places, 77 transitions, 541 flow. Second operand 9 states and 182 transitions. [2024-06-21 18:19:33,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 99 transitions, 799 flow [2024-06-21 18:19:33,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 99 transitions, 752 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 18:19:33,848 INFO L231 Difference]: Finished difference. Result has 123 places, 74 transitions, 500 flow [2024-06-21 18:19:33,849 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} [2024-06-21 18:19:33,849 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 83 predicate places. [2024-06-21 18:19:33,849 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 74 transitions, 500 flow [2024-06-21 18:19:33,849 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) [2024-06-21 18:19:33,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:33,849 INFO 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] [2024-06-21 18:19:33,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-21 18:19:33,849 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:33,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:33,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1950593055, now seen corresponding path program 32 times [2024-06-21 18:19:33,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:33,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097331217] [2024-06-21 18:19:33,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:33,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:33,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:33,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097331217] [2024-06-21 18:19:33,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097331217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:33,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:33,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:33,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055321463] [2024-06-21 18:19:33,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:33,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:33,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:33,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:33,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:33,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:33,973 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) [2024-06-21 18:19:33,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:33,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:33,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:34,154 INFO L124 PetriNetUnfolderBase]: 915/1606 cut-off events. [2024-06-21 18:19:34,154 INFO L125 PetriNetUnfolderBase]: For 68420/68420 co-relation queries the response was YES. [2024-06-21 18:19:34,159 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. [2024-06-21 18:19:34,163 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 54 selfloop transitions, 17 changer transitions 12/90 dead transitions. [2024-06-21 18:19:34,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 90 transitions, 718 flow [2024-06-21 18:19:34,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:34,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:34,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 18:19:34,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213675213675214 [2024-06-21 18:19:34,163 INFO L175 Difference]: Start difference. First operand has 123 places, 74 transitions, 500 flow. Second operand 9 states and 183 transitions. [2024-06-21 18:19:34,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 90 transitions, 718 flow [2024-06-21 18:19:34,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 90 transitions, 692 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 18:19:34,202 INFO L231 Difference]: Finished difference. Result has 120 places, 70 transitions, 486 flow [2024-06-21 18:19:34,202 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} [2024-06-21 18:19:34,202 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 80 predicate places. [2024-06-21 18:19:34,202 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 70 transitions, 486 flow [2024-06-21 18:19:34,203 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) [2024-06-21 18:19:34,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:34,203 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] [2024-06-21 18:19:34,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-21 18:19:34,203 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:34,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:34,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1950740925, now seen corresponding path program 33 times [2024-06-21 18:19:34,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:34,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634629276] [2024-06-21 18:19:34,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:34,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:34,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:34,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634629276] [2024-06-21 18:19:34,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634629276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:34,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:34,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:34,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082374030] [2024-06-21 18:19:34,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:34,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:34,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:34,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:34,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:34,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:34,354 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) [2024-06-21 18:19:34,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:34,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:34,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:34,511 INFO L124 PetriNetUnfolderBase]: 786/1409 cut-off events. [2024-06-21 18:19:34,511 INFO L125 PetriNetUnfolderBase]: For 51006/51006 co-relation queries the response was YES. [2024-06-21 18:19:34,515 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. [2024-06-21 18:19:34,518 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 52 selfloop transitions, 13 changer transitions 18/90 dead transitions. [2024-06-21 18:19:34,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 90 transitions, 722 flow [2024-06-21 18:19:34,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:34,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 18:19:34,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5242165242165242 [2024-06-21 18:19:34,519 INFO L175 Difference]: Start difference. First operand has 120 places, 70 transitions, 486 flow. Second operand 9 states and 184 transitions. [2024-06-21 18:19:34,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 90 transitions, 722 flow [2024-06-21 18:19:34,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 90 transitions, 684 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:34,560 INFO L231 Difference]: Finished difference. Result has 117 places, 65 transitions, 443 flow [2024-06-21 18:19:34,560 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} [2024-06-21 18:19:34,561 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 77 predicate places. [2024-06-21 18:19:34,561 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 65 transitions, 443 flow [2024-06-21 18:19:34,561 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) [2024-06-21 18:19:34,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:34,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:34,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-21 18:19:34,561 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:34,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:34,561 INFO L85 PathProgramCache]: Analyzing trace with hash -563055003, now seen corresponding path program 34 times [2024-06-21 18:19:34,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:34,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733706876] [2024-06-21 18:19:34,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:34,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:34,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:34,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733706876] [2024-06-21 18:19:34,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733706876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:34,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:34,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:34,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575060554] [2024-06-21 18:19:34,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:34,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:34,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:34,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:34,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:34,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:34,688 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) [2024-06-21 18:19:34,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:34,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:34,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:34,848 INFO L124 PetriNetUnfolderBase]: 813/1458 cut-off events. [2024-06-21 18:19:34,848 INFO L125 PetriNetUnfolderBase]: For 53549/53549 co-relation queries the response was YES. [2024-06-21 18:19:34,852 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. [2024-06-21 18:19:34,856 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 67 selfloop transitions, 14 changer transitions 8/96 dead transitions. [2024-06-21 18:19:34,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 96 transitions, 851 flow [2024-06-21 18:19:34,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:34,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:34,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-21 18:19:34,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-21 18:19:34,856 INFO L175 Difference]: Start difference. First operand has 117 places, 65 transitions, 443 flow. Second operand 9 states and 195 transitions. [2024-06-21 18:19:34,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 96 transitions, 851 flow [2024-06-21 18:19:34,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 96 transitions, 801 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 18:19:34,894 INFO L231 Difference]: Finished difference. Result has 110 places, 63 transitions, 428 flow [2024-06-21 18:19:34,894 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} [2024-06-21 18:19:34,895 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 70 predicate places. [2024-06-21 18:19:34,895 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 63 transitions, 428 flow [2024-06-21 18:19:34,895 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) [2024-06-21 18:19:34,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:34,895 INFO 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] [2024-06-21 18:19:34,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-21 18:19:34,895 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:34,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:34,895 INFO L85 PathProgramCache]: Analyzing trace with hash -279074685, now seen corresponding path program 35 times [2024-06-21 18:19:34,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:34,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076281340] [2024-06-21 18:19:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:34,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:34,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:34,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076281340] [2024-06-21 18:19:34,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076281340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:34,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:34,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:34,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750266139] [2024-06-21 18:19:34,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:34,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:34,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:34,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:34,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:35,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:35,047 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) [2024-06-21 18:19:35,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:35,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:35,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:35,182 INFO L124 PetriNetUnfolderBase]: 708/1275 cut-off events. [2024-06-21 18:19:35,182 INFO L125 PetriNetUnfolderBase]: For 36894/36894 co-relation queries the response was YES. [2024-06-21 18:19:35,186 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. [2024-06-21 18:19:35,189 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 55 selfloop transitions, 11 changer transitions 16/89 dead transitions. [2024-06-21 18:19:35,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 89 transitions, 734 flow [2024-06-21 18:19:35,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:35,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:35,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-21 18:19:35,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-21 18:19:35,189 INFO L175 Difference]: Start difference. First operand has 110 places, 63 transitions, 428 flow. Second operand 9 states and 189 transitions. [2024-06-21 18:19:35,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 89 transitions, 734 flow [2024-06-21 18:19:35,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 89 transitions, 699 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:35,224 INFO L231 Difference]: Finished difference. Result has 109 places, 59 transitions, 395 flow [2024-06-21 18:19:35,224 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} [2024-06-21 18:19:35,225 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 69 predicate places. [2024-06-21 18:19:35,225 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 59 transitions, 395 flow [2024-06-21 18:19:35,225 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) [2024-06-21 18:19:35,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:35,225 INFO 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] [2024-06-21 18:19:35,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-21 18:19:35,225 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:35,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:35,225 INFO L85 PathProgramCache]: Analyzing trace with hash -726144333, now seen corresponding path program 36 times [2024-06-21 18:19:35,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:35,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164457749] [2024-06-21 18:19:35,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:35,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:35,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:35,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164457749] [2024-06-21 18:19:35,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164457749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:35,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:35,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:19:35,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459602233] [2024-06-21 18:19:35,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:35,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:19:35,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:35,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:19:35,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:19:35,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:35,371 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) [2024-06-21 18:19:35,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:35,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:35,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:35,520 INFO L124 PetriNetUnfolderBase]: 584/1061 cut-off events. [2024-06-21 18:19:35,520 INFO L125 PetriNetUnfolderBase]: For 27965/27965 co-relation queries the response was YES. [2024-06-21 18:19:35,523 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. [2024-06-21 18:19:35,525 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 42 selfloop transitions, 5 changer transitions 25/79 dead transitions. [2024-06-21 18:19:35,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 79 transitions, 613 flow [2024-06-21 18:19:35,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:35,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 18:19:35,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071225071225072 [2024-06-21 18:19:35,526 INFO L175 Difference]: Start difference. First operand has 109 places, 59 transitions, 395 flow. Second operand 9 states and 178 transitions. [2024-06-21 18:19:35,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 79 transitions, 613 flow [2024-06-21 18:19:35,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 79 transitions, 585 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:35,547 INFO L231 Difference]: Finished difference. Result has 103 places, 52 transitions, 326 flow [2024-06-21 18:19:35,547 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} [2024-06-21 18:19:35,547 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 63 predicate places. [2024-06-21 18:19:35,547 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 52 transitions, 326 flow [2024-06-21 18:19:35,548 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) [2024-06-21 18:19:35,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:35,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:19:35,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-21 18:19:35,548 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:19:35,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:35,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1690868251, now seen corresponding path program 37 times [2024-06-21 18:19:35,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:35,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194039135] [2024-06-21 18:19:35,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:35,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:35,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:35,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194039135] [2024-06-21 18:19:35,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194039135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:35,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:35,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:19:35,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634742223] [2024-06-21 18:19:35,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:35,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:19:35,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:35,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:19:35,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:19:35,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:35,673 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) [2024-06-21 18:19:35,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:35,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:35,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:35,807 INFO L124 PetriNetUnfolderBase]: 525/952 cut-off events. [2024-06-21 18:19:35,808 INFO L125 PetriNetUnfolderBase]: For 20424/20424 co-relation queries the response was YES. [2024-06-21 18:19:35,810 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. [2024-06-21 18:19:35,812 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 47 selfloop transitions, 12 changer transitions 9/75 dead transitions. [2024-06-21 18:19:35,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 75 transitions, 632 flow [2024-06-21 18:19:35,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:35,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:35,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 18:19:35,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-21 18:19:35,813 INFO L175 Difference]: Start difference. First operand has 103 places, 52 transitions, 326 flow. Second operand 9 states and 182 transitions. [2024-06-21 18:19:35,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 75 transitions, 632 flow [2024-06-21 18:19:35,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 75 transitions, 590 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 18:19:35,823 INFO L231 Difference]: Finished difference. Result has 90 places, 49 transitions, 309 flow [2024-06-21 18:19:35,823 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} [2024-06-21 18:19:35,823 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 50 predicate places. [2024-06-21 18:19:35,823 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 49 transitions, 309 flow [2024-06-21 18:19:35,824 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) [2024-06-21 18:19:35,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:35,824 INFO 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] [2024-06-21 18:19:35,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-21 18:19:35,824 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)] === [2024-06-21 18:19:35,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:35,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1523129997, now seen corresponding path program 13 times [2024-06-21 18:19:35,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:35,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987547993] [2024-06-21 18:19:35,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:35,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:35,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:35,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987547993] [2024-06-21 18:19:35,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987547993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:35,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:35,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:19:35,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841015589] [2024-06-21 18:19:35,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:35,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:19:35,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:35,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:19:35,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:19:35,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:35,939 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) [2024-06-21 18:19:35,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:35,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:35,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:36,076 INFO L124 PetriNetUnfolderBase]: 497/906 cut-off events. [2024-06-21 18:19:36,076 INFO L125 PetriNetUnfolderBase]: For 15814/15814 co-relation queries the response was YES. [2024-06-21 18:19:36,079 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. [2024-06-21 18:19:36,082 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 46 selfloop transitions, 11 changer transitions 8/72 dead transitions. [2024-06-21 18:19:36,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 72 transitions, 599 flow [2024-06-21 18:19:36,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:36,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:36,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 18:19:36,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-21 18:19:36,083 INFO L175 Difference]: Start difference. First operand has 90 places, 49 transitions, 309 flow. Second operand 9 states and 182 transitions. [2024-06-21 18:19:36,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 72 transitions, 599 flow [2024-06-21 18:19:36,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 72 transitions, 565 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:36,093 INFO L231 Difference]: Finished difference. Result has 89 places, 47 transitions, 295 flow [2024-06-21 18:19:36,093 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} [2024-06-21 18:19:36,094 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 49 predicate places. [2024-06-21 18:19:36,094 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 47 transitions, 295 flow [2024-06-21 18:19:36,094 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) [2024-06-21 18:19:36,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:36,094 INFO 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] [2024-06-21 18:19:36,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-21 18:19:36,094 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)] === [2024-06-21 18:19:36,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:36,094 INFO L85 PathProgramCache]: Analyzing trace with hash 2050689861, now seen corresponding path program 14 times [2024-06-21 18:19:36,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:36,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621825954] [2024-06-21 18:19:36,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:36,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:36,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:36,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:36,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621825954] [2024-06-21 18:19:36,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621825954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:36,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:36,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:19:36,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165697367] [2024-06-21 18:19:36,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:36,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:19:36,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:36,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:19:36,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:19:36,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:36,221 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) [2024-06-21 18:19:36,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:36,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:36,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:36,323 INFO L124 PetriNetUnfolderBase]: 392/721 cut-off events. [2024-06-21 18:19:36,323 INFO L125 PetriNetUnfolderBase]: For 10924/10924 co-relation queries the response was YES. [2024-06-21 18:19:36,324 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. [2024-06-21 18:19:36,326 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 38 selfloop transitions, 10 changer transitions 11/66 dead transitions. [2024-06-21 18:19:36,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 66 transitions, 509 flow [2024-06-21 18:19:36,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:36,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:36,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 18:19:36,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5042735042735043 [2024-06-21 18:19:36,326 INFO L175 Difference]: Start difference. First operand has 89 places, 47 transitions, 295 flow. Second operand 9 states and 177 transitions. [2024-06-21 18:19:36,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 66 transitions, 509 flow [2024-06-21 18:19:36,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 66 transitions, 480 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:19:36,333 INFO L231 Difference]: Finished difference. Result has 88 places, 42 transitions, 253 flow [2024-06-21 18:19:36,333 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} [2024-06-21 18:19:36,333 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 48 predicate places. [2024-06-21 18:19:36,333 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 42 transitions, 253 flow [2024-06-21 18:19:36,333 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) [2024-06-21 18:19:36,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:36,333 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] [2024-06-21 18:19:36,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-21 18:19:36,333 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)] === [2024-06-21 18:19:36,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:36,334 INFO L85 PathProgramCache]: Analyzing trace with hash -165859079, now seen corresponding path program 38 times [2024-06-21 18:19:36,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:36,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870572982] [2024-06-21 18:19:36,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:36,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:36,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:36,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870572982] [2024-06-21 18:19:36,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870572982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:36,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:36,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:19:36,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333781104] [2024-06-21 18:19:36,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:36,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:19:36,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:36,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:19:36,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:19:36,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:36,451 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) [2024-06-21 18:19:36,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:36,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:36,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:36,545 INFO L124 PetriNetUnfolderBase]: 284/527 cut-off events. [2024-06-21 18:19:36,545 INFO L125 PetriNetUnfolderBase]: For 6674/6674 co-relation queries the response was YES. [2024-06-21 18:19:36,546 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. [2024-06-21 18:19:36,547 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 25 selfloop transitions, 3 changer transitions 23/58 dead transitions. [2024-06-21 18:19:36,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 58 transitions, 407 flow [2024-06-21 18:19:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:19:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:19:36,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 18:19:36,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843304843304843 [2024-06-21 18:19:36,548 INFO L175 Difference]: Start difference. First operand has 88 places, 42 transitions, 253 flow. Second operand 9 states and 170 transitions. [2024-06-21 18:19:36,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 58 transitions, 407 flow [2024-06-21 18:19:36,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 58 transitions, 381 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 18:19:36,553 INFO L231 Difference]: Finished difference. Result has 81 places, 33 transitions, 172 flow [2024-06-21 18:19:36,553 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} [2024-06-21 18:19:36,553 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 41 predicate places. [2024-06-21 18:19:36,553 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 33 transitions, 172 flow [2024-06-21 18:19:36,553 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) [2024-06-21 18:19:36,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:36,553 INFO 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] [2024-06-21 18:19:36,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-21 18:19:36,554 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)] === [2024-06-21 18:19:36,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:36,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1434011551, now seen corresponding path program 39 times [2024-06-21 18:19:36,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:36,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968148030] [2024-06-21 18:19:36,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:36,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:36,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:36,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968148030] [2024-06-21 18:19:36,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968148030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:36,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:36,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:19:36,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461065688] [2024-06-21 18:19:36,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:36,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:19:36,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:36,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:19:36,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:19:36,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:36,690 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) [2024-06-21 18:19:36,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:36,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:36,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:36,762 INFO L124 PetriNetUnfolderBase]: 229/426 cut-off events. [2024-06-21 18:19:36,762 INFO L125 PetriNetUnfolderBase]: For 4668/4676 co-relation queries the response was YES. [2024-06-21 18:19:36,763 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. [2024-06-21 18:19:36,764 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 23 selfloop transitions, 4 changer transitions 17/51 dead transitions. [2024-06-21 18:19:36,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 51 transitions, 324 flow [2024-06-21 18:19:36,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:19:36,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:19:36,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 18:19:36,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967948717948718 [2024-06-21 18:19:36,765 INFO L175 Difference]: Start difference. First operand has 81 places, 33 transitions, 172 flow. Second operand 8 states and 155 transitions. [2024-06-21 18:19:36,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 51 transitions, 324 flow [2024-06-21 18:19:36,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 51 transitions, 296 flow, removed 8 selfloop flow, removed 14 redundant places. [2024-06-21 18:19:36,768 INFO L231 Difference]: Finished difference. Result has 60 places, 30 transitions, 136 flow [2024-06-21 18:19:36,768 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} [2024-06-21 18:19:36,769 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 20 predicate places. [2024-06-21 18:19:36,769 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 30 transitions, 136 flow [2024-06-21 18:19:36,769 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) [2024-06-21 18:19:36,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:36,769 INFO 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] [2024-06-21 18:19:36,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-21 18:19:36,769 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)] === [2024-06-21 18:19:36,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:36,770 INFO L85 PathProgramCache]: Analyzing trace with hash 35219941, now seen corresponding path program 40 times [2024-06-21 18:19:36,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:36,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96538435] [2024-06-21 18:19:36,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:36,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:36,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:36,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96538435] [2024-06-21 18:19:36,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96538435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:36,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:36,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:19:36,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442023288] [2024-06-21 18:19:36,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:36,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:19:36,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:36,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:19:36,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:19:36,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:36,893 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) [2024-06-21 18:19:36,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:36,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:36,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:36,942 INFO L124 PetriNetUnfolderBase]: 185/350 cut-off events. [2024-06-21 18:19:36,942 INFO L125 PetriNetUnfolderBase]: For 1623/1631 co-relation queries the response was YES. [2024-06-21 18:19:36,942 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. [2024-06-21 18:19:36,943 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 24 selfloop transitions, 5 changer transitions 8/44 dead transitions. [2024-06-21 18:19:36,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 44 transitions, 258 flow [2024-06-21 18:19:36,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:19:36,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:19:36,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 18:19:36,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4775641025641026 [2024-06-21 18:19:36,945 INFO L175 Difference]: Start difference. First operand has 60 places, 30 transitions, 136 flow. Second operand 8 states and 149 transitions. [2024-06-21 18:19:36,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 44 transitions, 258 flow [2024-06-21 18:19:36,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 44 transitions, 238 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 18:19:36,946 INFO L231 Difference]: Finished difference. Result has 56 places, 28 transitions, 121 flow [2024-06-21 18:19:36,946 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} [2024-06-21 18:19:36,947 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 16 predicate places. [2024-06-21 18:19:36,947 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 28 transitions, 121 flow [2024-06-21 18:19:36,947 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) [2024-06-21 18:19:36,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:19:36,947 INFO 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] [2024-06-21 18:19:36,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-21 18:19:36,947 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)] === [2024-06-21 18:19:36,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:19:36,948 INFO L85 PathProgramCache]: Analyzing trace with hash 193322463, now seen corresponding path program 41 times [2024-06-21 18:19:36,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:19:36,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601409716] [2024-06-21 18:19:36,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:19:36,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:19:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:19:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:19:37,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:19:37,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601409716] [2024-06-21 18:19:37,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601409716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:19:37,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:19:37,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:19:37,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764443568] [2024-06-21 18:19:37,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:19:37,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:19:37,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:19:37,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:19:37,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:19:37,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:19:37,090 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) [2024-06-21 18:19:37,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:19:37,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:19:37,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:19:37,138 INFO L124 PetriNetUnfolderBase]: 80/171 cut-off events. [2024-06-21 18:19:37,138 INFO L125 PetriNetUnfolderBase]: For 631/639 co-relation queries the response was YES. [2024-06-21 18:19:37,138 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. [2024-06-21 18:19:37,139 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2024-06-21 18:19:37,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 37 transitions, 191 flow [2024-06-21 18:19:37,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:19:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:19:37,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 18:19:37,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 18:19:37,139 INFO L175 Difference]: Start difference. First operand has 56 places, 28 transitions, 121 flow. Second operand 8 states and 143 transitions. [2024-06-21 18:19:37,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 37 transitions, 191 flow [2024-06-21 18:19:37,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 37 transitions, 164 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 18:19:37,140 INFO L231 Difference]: Finished difference. Result has 49 places, 0 transitions, 0 flow [2024-06-21 18:19:37,140 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} [2024-06-21 18:19:37,141 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 9 predicate places. [2024-06-21 18:19:37,141 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 0 transitions, 0 flow [2024-06-21 18:19:37,141 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) [2024-06-21 18:19:37,143 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-21 18:19:37,143 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-21 18:19:37,144 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-21 18:19:37,144 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-21 18:19:37,144 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-21 18:19:37,144 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-21 18:19:37,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-21 18:19:37,145 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] [2024-06-21 18:19:37,147 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 18:19:37,147 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 18:19:37,150 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-21 18:19:37,150 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-21 18:19:37,151 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 06:19:37 BasicIcfg [2024-06-21 18:19:37,151 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 18:19:37,151 INFO L158 Benchmark]: Toolchain (without parser) took 369312.60ms. Allocated memory was 153.1MB in the beginning and 2.6GB in the end (delta: 2.4GB). Free memory was 75.9MB in the beginning and 2.3GB in the end (delta: -2.3GB). Peak memory consumption was 160.6MB. Max. memory is 16.1GB. [2024-06-21 18:19:37,153 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 153.1MB. Free memory is still 106.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 18:19:37,153 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 153.1MB. Free memory is still 123.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 18:19:37,153 INFO L158 Benchmark]: CACSL2BoogieTranslator took 462.24ms. Allocated memory was 153.1MB in the beginning and 207.6MB in the end (delta: 54.5MB). Free memory was 75.7MB in the beginning and 166.9MB in the end (delta: -91.1MB). Peak memory consumption was 23.3MB. Max. memory is 16.1GB. [2024-06-21 18:19:37,153 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.17ms. Allocated memory is still 207.6MB. Free memory was 166.9MB in the beginning and 164.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 18:19:37,154 INFO L158 Benchmark]: Boogie Preprocessor took 38.66ms. Allocated memory is still 207.6MB. Free memory was 164.7MB in the beginning and 162.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 18:19:37,154 INFO L158 Benchmark]: RCFGBuilder took 419.23ms. Allocated memory is still 207.6MB. Free memory was 162.7MB in the beginning and 137.5MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-21 18:19:37,154 INFO L158 Benchmark]: TraceAbstraction took 368358.89ms. Allocated memory was 207.6MB in the beginning and 2.6GB in the end (delta: 2.4GB). Free memory was 136.5MB in the beginning and 2.3GB in the end (delta: -2.2GB). Peak memory consumption was 164.5MB. Max. memory is 16.1GB. [2024-06-21 18:19:37,154 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.16ms. Allocated memory is still 153.1MB. Free memory is still 106.6MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.14ms. Allocated memory is still 153.1MB. Free memory is still 123.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 462.24ms. Allocated memory was 153.1MB in the beginning and 207.6MB in the end (delta: 54.5MB). Free memory was 75.7MB in the beginning and 166.9MB in the end (delta: -91.1MB). Peak memory consumption was 23.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.17ms. Allocated memory is still 207.6MB. Free memory was 166.9MB in the beginning and 164.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.66ms. Allocated memory is still 207.6MB. Free memory was 164.7MB in the beginning and 162.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 419.23ms. Allocated memory is still 207.6MB. Free memory was 162.7MB in the beginning and 137.5MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 368358.89ms. Allocated memory was 207.6MB in the beginning and 2.6GB in the end (delta: 2.4GB). Free memory was 136.5MB in the beginning and 2.3GB in the end (delta: -2.2GB). Peak memory consumption was 164.5MB. 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: 368.3s, OverallIterations: 206, TraceHistogramMax: 1, PathProgramHistogramMax: 41, EmptinessCheckTime: 0.0s, AutomataDifference: 349.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13814 SdHoareTripleChecker+Valid, 22.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11277 mSDsluCounter, 3825 SdHoareTripleChecker+Invalid, 17.8s 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, 1585 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 1383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 6.9s 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, 0.4s SatisfiabilityAnalysisTime, 17.5s 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! [2024-06-21 18:19:37,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE