./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe003_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe003_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/safe003_tso.i ./goblint.2024-05-21_14-57-05.files/protection/safe003_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-76401ed-m [2024-06-20 15:13:23,147 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:13:23,214 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:13:23,218 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:13:23,218 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:13:23,242 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:13:23,243 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:13:23,243 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:13:23,244 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:13:23,247 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:13:23,248 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:13:23,248 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:13:23,249 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:13:23,250 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:13:23,250 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:13:23,250 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:13:23,251 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:13:23,251 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:13:23,251 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:13:23,251 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:13:23,251 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:13:23,252 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:13:23,252 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:13:23,252 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:13:23,253 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:13:23,253 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:13:23,253 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:13:23,253 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:13:23,254 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:13:23,254 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:13:23,255 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:13:23,255 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:13:23,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:13:23,256 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:13:23,256 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:13:23,256 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:13:23,256 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:13:23,256 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:13:23,257 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:13:23,257 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:13:23,257 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:13:23,257 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:13:23,257 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:13:23,258 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:13:23,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:13:23,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:13:23,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:13:23,516 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:13:23,516 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:13:23,517 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe003_tso.yml/witness.yml [2024-06-20 15:13:23,683 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:13:23,690 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:13:23,690 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe003_tso.i [2024-06-20 15:13:24,914 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:13:25,220 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:13:25,223 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe003_tso.i [2024-06-20 15:13:25,240 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c819869a5/c02a47049ce148eeb1b51262a014d72e/FLAGceb767602 [2024-06-20 15:13:25,255 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c819869a5/c02a47049ce148eeb1b51262a014d72e [2024-06-20 15:13:25,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:13:25,257 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:13:25,259 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:13:25,259 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:13:25,263 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:13:25,263 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:13:23" (1/2) ... [2024-06-20 15:13:25,264 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7470cd93 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:25, skipping insertion in model container [2024-06-20 15:13:25,264 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:13:23" (1/2) ... [2024-06-20 15:13:25,265 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1a923427 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:25, skipping insertion in model container [2024-06-20 15:13:25,266 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:13:25" (2/2) ... [2024-06-20 15:13:25,266 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7470cd93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:25, skipping insertion in model container [2024-06-20 15:13:25,266 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:13:25" (2/2) ... [2024-06-20 15:13:25,267 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:13:25,301 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:13:25,302 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) [2024-06-20 15:13:25,302 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] (((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) [2024-06-20 15:13:25,302 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) [2024-06-20 15:13:25,302 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:13:25,302 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-20 15:13:25,345 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:13:25,646 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:13:25,655 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:13:25,736 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:13:25,770 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:13:25,770 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:25 WrapperNode [2024-06-20 15:13:25,770 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:13:25,771 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:13:25,771 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:13:25,771 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:13:25,777 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:25" (1/1) ... [2024-06-20 15:13:25,802 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:25" (1/1) ... [2024-06-20 15:13:25,834 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-20 15:13:25,834 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:13:25,835 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:13:25,835 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:13:25,836 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:13:25,844 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:25" (1/1) ... [2024-06-20 15:13:25,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:25" (1/1) ... [2024-06-20 15:13:25,848 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:25" (1/1) ... [2024-06-20 15:13:25,868 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]. [2024-06-20 15:13:25,869 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:25" (1/1) ... [2024-06-20 15:13:25,869 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:25" (1/1) ... [2024-06-20 15:13:25,885 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:25" (1/1) ... [2024-06-20 15:13:25,886 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:25" (1/1) ... [2024-06-20 15:13:25,889 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:25" (1/1) ... [2024-06-20 15:13:25,892 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:25" (1/1) ... [2024-06-20 15:13:25,894 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:13:25,898 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:13:25,898 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:13:25,899 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:13:25,899 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:25" (1/1) ... [2024-06-20 15:13:25,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:13:25,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:13:25,958 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) [2024-06-20 15:13:26,006 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 [2024-06-20 15:13:26,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:13:26,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:13:26,021 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:13:26,021 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:13:26,021 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:13:26,022 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:13:26,022 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 15:13:26,022 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 15:13:26,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:13:26,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:13:26,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:13:26,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:13:26,024 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 15:13:26,148 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:13:26,151 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:13:26,311 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:13:26,312 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:13:26,377 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:13:26,378 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:13:26,378 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:13:26 BoogieIcfgContainer [2024-06-20 15:13:26,378 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:13:26,379 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:13:26,380 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:13:26,382 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:13:26,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:13:23" (1/4) ... [2024-06-20 15:13:26,383 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34fc1c8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:13:26, skipping insertion in model container [2024-06-20 15:13:26,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:13:25" (2/4) ... [2024-06-20 15:13:26,383 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34fc1c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:13:26, skipping insertion in model container [2024-06-20 15:13:26,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:25" (3/4) ... [2024-06-20 15:13:26,383 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34fc1c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:13:26, skipping insertion in model container [2024-06-20 15:13:26,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:13:26" (4/4) ... [2024-06-20 15:13:26,385 INFO L112 eAbstractionObserver]: Analyzing ICFG safe003_tso.i [2024-06-20 15:13:26,397 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:13:26,398 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 15:13:26,398 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:13:26,429 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:13:26,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 15:13:26,479 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-20 15:13:26,479 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:13:26,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 15:13:26,481 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 15:13:26,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-20 15:13:26,500 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:13:26,505 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;@4a861a90, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:13:26,506 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 15:13:26,508 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:13:26,508 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 15:13:26,509 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:13:26,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:26,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:13:26,510 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)] === [2024-06-20 15:13:26,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:26,514 INFO L85 PathProgramCache]: Analyzing trace with hash 219930474, now seen corresponding path program 1 times [2024-06-20 15:13:26,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:26,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60191155] [2024-06-20 15:13:26,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:26,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:27,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:27,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60191155] [2024-06-20 15:13:27,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60191155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:27,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:27,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:13:27,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702694016] [2024-06-20 15:13:27,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:27,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:13:27,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:27,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:13:27,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:13:27,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-20 15:13:27,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:27,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:27,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-20 15:13:27,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:27,364 INFO L124 PetriNetUnfolderBase]: 474/798 cut-off events. [2024-06-20 15:13:27,365 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-06-20 15:13:27,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1607 conditions, 798 events. 474/798 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3918 event pairs, 292 based on Foata normal form. 1/755 useless extension candidates. Maximal degree in co-relation 1595. Up to 744 conditions per place. [2024-06-20 15:13:27,376 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 27 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-20 15:13:27,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 159 flow [2024-06-20 15:13:27,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:13:27,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:13:27,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-20 15:13:27,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-06-20 15:13:27,387 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 85 transitions. [2024-06-20 15:13:27,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 159 flow [2024-06-20 15:13:27,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 154 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:27,391 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-20 15:13:27,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-20 15:13:27,396 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-20 15:13:27,396 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-20 15:13:27,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:27,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:27,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:27,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:13:27,413 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)] === [2024-06-20 15:13:27,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:27,414 INFO L85 PathProgramCache]: Analyzing trace with hash 899799369, now seen corresponding path program 1 times [2024-06-20 15:13:27,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:27,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792163035] [2024-06-20 15:13:27,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:27,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:27,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:27,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792163035] [2024-06-20 15:13:27,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792163035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:27,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:27,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:13:27,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314416723] [2024-06-20 15:13:27,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:27,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:13:27,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:27,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:13:27,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:13:27,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:27,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 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) [2024-06-20 15:13:27,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:27,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:27,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:27,918 INFO L124 PetriNetUnfolderBase]: 742/1214 cut-off events. [2024-06-20 15:13:27,918 INFO L125 PetriNetUnfolderBase]: For 234/237 co-relation queries the response was YES. [2024-06-20 15:13:27,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2778 conditions, 1214 events. 742/1214 cut-off events. For 234/237 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5946 event pairs, 380 based on Foata normal form. 7/1214 useless extension candidates. Maximal degree in co-relation 2766. Up to 1086 conditions per place. [2024-06-20 15:13:27,930 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 42 selfloop transitions, 10 changer transitions 0/60 dead transitions. [2024-06-20 15:13:27,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 60 transitions, 276 flow [2024-06-20 15:13:27,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:13:27,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:13:27,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-06-20 15:13:27,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.69375 [2024-06-20 15:13:27,936 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 111 transitions. [2024-06-20 15:13:27,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 60 transitions, 276 flow [2024-06-20 15:13:27,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 60 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:27,941 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 169 flow [2024-06-20 15:13:27,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2024-06-20 15:13:27,942 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-20 15:13:27,942 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 169 flow [2024-06-20 15:13:27,942 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) [2024-06-20 15:13:27,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:27,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:27,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:13:27,945 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)] === [2024-06-20 15:13:27,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:27,948 INFO L85 PathProgramCache]: Analyzing trace with hash 2123977079, now seen corresponding path program 1 times [2024-06-20 15:13:27,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:27,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302834977] [2024-06-20 15:13:27,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:27,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:28,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:28,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302834977] [2024-06-20 15:13:28,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302834977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:28,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:28,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:28,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960630153] [2024-06-20 15:13:28,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:28,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:28,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:28,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:28,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:28,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:28,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 169 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) [2024-06-20 15:13:28,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:28,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:28,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:28,339 INFO L124 PetriNetUnfolderBase]: 926/1520 cut-off events. [2024-06-20 15:13:28,339 INFO L125 PetriNetUnfolderBase]: For 1002/1002 co-relation queries the response was YES. [2024-06-20 15:13:28,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4068 conditions, 1520 events. 926/1520 cut-off events. For 1002/1002 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7475 event pairs, 372 based on Foata normal form. 3/1521 useless extension candidates. Maximal degree in co-relation 4053. Up to 1374 conditions per place. [2024-06-20 15:13:28,348 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 56 selfloop transitions, 10 changer transitions 0/73 dead transitions. [2024-06-20 15:13:28,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 73 transitions, 390 flow [2024-06-20 15:13:28,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:28,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:28,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-20 15:13:28,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-20 15:13:28,351 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 169 flow. Second operand 5 states and 127 transitions. [2024-06-20 15:13:28,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 73 transitions, 390 flow [2024-06-20 15:13:28,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 388 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-20 15:13:28,354 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 254 flow [2024-06-20 15:13:28,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2024-06-20 15:13:28,355 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-20 15:13:28,355 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 254 flow [2024-06-20 15:13:28,355 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) [2024-06-20 15:13:28,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:28,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:28,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:13:28,356 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)] === [2024-06-20 15:13:28,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:28,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1032521654, now seen corresponding path program 1 times [2024-06-20 15:13:28,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:28,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378560408] [2024-06-20 15:13:28,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:28,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:28,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:28,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378560408] [2024-06-20 15:13:28,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378560408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:28,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:28,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:28,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182086417] [2024-06-20 15:13:28,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:28,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:28,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:28,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:28,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:28,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:28,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 254 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) [2024-06-20 15:13:28,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:28,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:28,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:28,738 INFO L124 PetriNetUnfolderBase]: 917/1503 cut-off events. [2024-06-20 15:13:28,738 INFO L125 PetriNetUnfolderBase]: For 1558/1558 co-relation queries the response was YES. [2024-06-20 15:13:28,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4482 conditions, 1503 events. 917/1503 cut-off events. For 1558/1558 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7364 event pairs, 251 based on Foata normal form. 6/1507 useless extension candidates. Maximal degree in co-relation 4462. Up to 1329 conditions per place. [2024-06-20 15:13:28,750 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 60 selfloop transitions, 12 changer transitions 0/79 dead transitions. [2024-06-20 15:13:28,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 79 transitions, 466 flow [2024-06-20 15:13:28,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:28,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:28,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-20 15:13:28,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-20 15:13:28,753 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 254 flow. Second operand 6 states and 147 transitions. [2024-06-20 15:13:28,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 79 transitions, 466 flow [2024-06-20 15:13:28,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 79 transitions, 464 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-20 15:13:28,757 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 289 flow [2024-06-20 15:13:28,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=289, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-20 15:13:28,758 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-20 15:13:28,758 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 289 flow [2024-06-20 15:13:28,758 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) [2024-06-20 15:13:28,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:28,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:28,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:13:28,759 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)] === [2024-06-20 15:13:28,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:28,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1088277451, now seen corresponding path program 1 times [2024-06-20 15:13:28,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:28,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489998920] [2024-06-20 15:13:28,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:28,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:28,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:28,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489998920] [2024-06-20 15:13:28,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489998920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:28,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:28,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:28,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625586609] [2024-06-20 15:13:28,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:28,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:28,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:28,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:28,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:28,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:28,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 289 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) [2024-06-20 15:13:28,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:28,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:28,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:29,081 INFO L124 PetriNetUnfolderBase]: 904/1470 cut-off events. [2024-06-20 15:13:29,082 INFO L125 PetriNetUnfolderBase]: For 2292/2303 co-relation queries the response was YES. [2024-06-20 15:13:29,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4689 conditions, 1470 events. 904/1470 cut-off events. For 2292/2303 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7201 event pairs, 348 based on Foata normal form. 12/1476 useless extension candidates. Maximal degree in co-relation 4666. Up to 1305 conditions per place. [2024-06-20 15:13:29,092 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 45 selfloop transitions, 14 changer transitions 0/66 dead transitions. [2024-06-20 15:13:29,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 446 flow [2024-06-20 15:13:29,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:13:29,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:13:29,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-20 15:13:29,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-20 15:13:29,094 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 289 flow. Second operand 4 states and 102 transitions. [2024-06-20 15:13:29,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 446 flow [2024-06-20 15:13:29,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 419 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:29,097 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 324 flow [2024-06-20 15:13:29,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=324, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-20 15:13:29,098 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 17 predicate places. [2024-06-20 15:13:29,099 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 324 flow [2024-06-20 15:13:29,099 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) [2024-06-20 15:13:29,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:29,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:29,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:13:29,099 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)] === [2024-06-20 15:13:29,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:29,100 INFO L85 PathProgramCache]: Analyzing trace with hash -958029466, now seen corresponding path program 1 times [2024-06-20 15:13:29,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:29,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321680100] [2024-06-20 15:13:29,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:29,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:29,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:29,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321680100] [2024-06-20 15:13:29,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321680100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:29,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:29,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:29,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873272077] [2024-06-20 15:13:29,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:29,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:29,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:29,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:29,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:29,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:29,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 324 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) [2024-06-20 15:13:29,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:29,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:29,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:29,505 INFO L124 PetriNetUnfolderBase]: 931/1524 cut-off events. [2024-06-20 15:13:29,505 INFO L125 PetriNetUnfolderBase]: For 2825/2825 co-relation queries the response was YES. [2024-06-20 15:13:29,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5039 conditions, 1524 events. 931/1524 cut-off events. For 2825/2825 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7512 event pairs, 315 based on Foata normal form. 2/1517 useless extension candidates. Maximal degree in co-relation 5014. Up to 1275 conditions per place. [2024-06-20 15:13:29,515 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 60 selfloop transitions, 27 changer transitions 0/94 dead transitions. [2024-06-20 15:13:29,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 94 transitions, 666 flow [2024-06-20 15:13:29,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:29,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:29,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-20 15:13:29,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-20 15:13:29,517 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 324 flow. Second operand 6 states and 158 transitions. [2024-06-20 15:13:29,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 94 transitions, 666 flow [2024-06-20 15:13:29,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 94 transitions, 651 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:29,521 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 435 flow [2024-06-20 15:13:29,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=435, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-20 15:13:29,522 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2024-06-20 15:13:29,522 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 435 flow [2024-06-20 15:13:29,523 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) [2024-06-20 15:13:29,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:29,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:29,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:13:29,523 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)] === [2024-06-20 15:13:29,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:29,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1104153096, now seen corresponding path program 2 times [2024-06-20 15:13:29,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:29,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758792999] [2024-06-20 15:13:29,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:29,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:29,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:29,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:29,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758792999] [2024-06-20 15:13:29,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758792999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:29,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:29,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:29,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457693236] [2024-06-20 15:13:29,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:29,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:29,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:29,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:29,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:29,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:29,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 435 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) [2024-06-20 15:13:29,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:29,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:29,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:29,908 INFO L124 PetriNetUnfolderBase]: 953/1565 cut-off events. [2024-06-20 15:13:29,908 INFO L125 PetriNetUnfolderBase]: For 4244/4244 co-relation queries the response was YES. [2024-06-20 15:13:29,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5698 conditions, 1565 events. 953/1565 cut-off events. For 4244/4244 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7732 event pairs, 314 based on Foata normal form. 2/1560 useless extension candidates. Maximal degree in co-relation 5671. Up to 1358 conditions per place. [2024-06-20 15:13:29,920 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 64 selfloop transitions, 22 changer transitions 0/93 dead transitions. [2024-06-20 15:13:29,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 93 transitions, 721 flow [2024-06-20 15:13:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:29,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 15:13:29,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-20 15:13:29,922 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 435 flow. Second operand 6 states and 148 transitions. [2024-06-20 15:13:29,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 93 transitions, 721 flow [2024-06-20 15:13:29,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 691 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:29,929 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 521 flow [2024-06-20 15:13:29,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=521, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2024-06-20 15:13:29,930 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 27 predicate places. [2024-06-20 15:13:29,930 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 521 flow [2024-06-20 15:13:29,930 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) [2024-06-20 15:13:29,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:29,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:29,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:13:29,931 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)] === [2024-06-20 15:13:29,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:29,931 INFO L85 PathProgramCache]: Analyzing trace with hash 936426212, now seen corresponding path program 3 times [2024-06-20 15:13:29,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:29,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131810114] [2024-06-20 15:13:29,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:29,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:30,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:30,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131810114] [2024-06-20 15:13:30,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131810114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:30,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:30,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:30,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183075362] [2024-06-20 15:13:30,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:30,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:30,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:30,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:30,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:30,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:30,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 521 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) [2024-06-20 15:13:30,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:30,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:30,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:30,410 INFO L124 PetriNetUnfolderBase]: 959/1579 cut-off events. [2024-06-20 15:13:30,410 INFO L125 PetriNetUnfolderBase]: For 5340/5340 co-relation queries the response was YES. [2024-06-20 15:13:30,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5941 conditions, 1579 events. 959/1579 cut-off events. For 5340/5340 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7855 event pairs, 314 based on Foata normal form. 4/1576 useless extension candidates. Maximal degree in co-relation 5911. Up to 1313 conditions per place. [2024-06-20 15:13:30,421 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 63 selfloop transitions, 31 changer transitions 0/101 dead transitions. [2024-06-20 15:13:30,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 101 transitions, 827 flow [2024-06-20 15:13:30,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:30,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:30,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-20 15:13:30,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-20 15:13:30,423 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 521 flow. Second operand 6 states and 155 transitions. [2024-06-20 15:13:30,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 101 transitions, 827 flow [2024-06-20 15:13:30,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 101 transitions, 769 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:30,433 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 576 flow [2024-06-20 15:13:30,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=576, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-20 15:13:30,435 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-20 15:13:30,436 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 576 flow [2024-06-20 15:13:30,436 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) [2024-06-20 15:13:30,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:30,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:30,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:13:30,436 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)] === [2024-06-20 15:13:30,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:30,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1409483106, now seen corresponding path program 1 times [2024-06-20 15:13:30,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:30,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116239204] [2024-06-20 15:13:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:30,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:30,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:30,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116239204] [2024-06-20 15:13:30,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116239204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:30,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:30,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:30,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980928658] [2024-06-20 15:13:30,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:30,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:30,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:30,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:30,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:30,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:30,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 576 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) [2024-06-20 15:13:30,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:30,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:30,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:30,799 INFO L124 PetriNetUnfolderBase]: 968/1599 cut-off events. [2024-06-20 15:13:30,800 INFO L125 PetriNetUnfolderBase]: For 6823/6837 co-relation queries the response was YES. [2024-06-20 15:13:30,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6194 conditions, 1599 events. 968/1599 cut-off events. For 6823/6837 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8023 event pairs, 295 based on Foata normal form. 18/1610 useless extension candidates. Maximal degree in co-relation 6162. Up to 1355 conditions per place. [2024-06-20 15:13:30,811 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 66 selfloop transitions, 20 changer transitions 0/93 dead transitions. [2024-06-20 15:13:30,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 93 transitions, 808 flow [2024-06-20 15:13:30,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-20 15:13:30,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-20 15:13:30,812 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 576 flow. Second operand 5 states and 124 transitions. [2024-06-20 15:13:30,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 93 transitions, 808 flow [2024-06-20 15:13:30,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 93 transitions, 744 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:30,822 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 586 flow [2024-06-20 15:13:30,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=586, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2024-06-20 15:13:30,823 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-20 15:13:30,823 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 586 flow [2024-06-20 15:13:30,823 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) [2024-06-20 15:13:30,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:30,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:30,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:13:30,824 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)] === [2024-06-20 15:13:30,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:30,824 INFO L85 PathProgramCache]: Analyzing trace with hash 365858918, now seen corresponding path program 1 times [2024-06-20 15:13:30,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:30,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953921730] [2024-06-20 15:13:30,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:30,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:30,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:30,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953921730] [2024-06-20 15:13:30,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953921730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:30,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:30,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:30,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195698556] [2024-06-20 15:13:30,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:30,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:30,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:30,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:30,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:30,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:30,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 586 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) [2024-06-20 15:13:30,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:30,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:30,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:31,171 INFO L124 PetriNetUnfolderBase]: 963/1587 cut-off events. [2024-06-20 15:13:31,171 INFO L125 PetriNetUnfolderBase]: For 6648/6659 co-relation queries the response was YES. [2024-06-20 15:13:31,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6286 conditions, 1587 events. 963/1587 cut-off events. For 6648/6659 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7916 event pairs, 324 based on Foata normal form. 10/1589 useless extension candidates. Maximal degree in co-relation 6253. Up to 1303 conditions per place. [2024-06-20 15:13:31,181 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 64 selfloop transitions, 30 changer transitions 0/101 dead transitions. [2024-06-20 15:13:31,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 101 transitions, 866 flow [2024-06-20 15:13:31,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:31,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:31,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 15:13:31,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:13:31,182 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 586 flow. Second operand 6 states and 150 transitions. [2024-06-20 15:13:31,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 101 transitions, 866 flow [2024-06-20 15:13:31,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 101 transitions, 816 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:31,191 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 604 flow [2024-06-20 15:13:31,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=604, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2024-06-20 15:13:31,191 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-06-20 15:13:31,191 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 604 flow [2024-06-20 15:13:31,192 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) [2024-06-20 15:13:31,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:31,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:31,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:13:31,192 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)] === [2024-06-20 15:13:31,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:31,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1114055078, now seen corresponding path program 2 times [2024-06-20 15:13:31,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:31,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646619962] [2024-06-20 15:13:31,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:31,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:31,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:31,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646619962] [2024-06-20 15:13:31,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646619962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:31,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:31,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:31,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291714512] [2024-06-20 15:13:31,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:31,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:31,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:31,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:31,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:31,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:31,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 604 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) [2024-06-20 15:13:31,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:31,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:31,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:31,578 INFO L124 PetriNetUnfolderBase]: 974/1608 cut-off events. [2024-06-20 15:13:31,578 INFO L125 PetriNetUnfolderBase]: For 7787/7798 co-relation queries the response was YES. [2024-06-20 15:13:31,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6487 conditions, 1608 events. 974/1608 cut-off events. For 7787/7798 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8056 event pairs, 324 based on Foata normal form. 10/1610 useless extension candidates. Maximal degree in co-relation 6453. Up to 1333 conditions per place. [2024-06-20 15:13:31,587 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 64 selfloop transitions, 29 changer transitions 0/100 dead transitions. [2024-06-20 15:13:31,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 100 transitions, 906 flow [2024-06-20 15:13:31,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:31,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:31,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-20 15:13:31,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-20 15:13:31,589 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 604 flow. Second operand 5 states and 129 transitions. [2024-06-20 15:13:31,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 100 transitions, 906 flow [2024-06-20 15:13:31,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 100 transitions, 797 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:31,598 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 592 flow [2024-06-20 15:13:31,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=592, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-20 15:13:31,598 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2024-06-20 15:13:31,598 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 592 flow [2024-06-20 15:13:31,599 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) [2024-06-20 15:13:31,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:31,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:31,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:13:31,599 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)] === [2024-06-20 15:13:31,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:31,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1114060658, now seen corresponding path program 3 times [2024-06-20 15:13:31,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:31,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446824548] [2024-06-20 15:13:31,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:31,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:31,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:31,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446824548] [2024-06-20 15:13:31,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446824548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:31,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:31,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:31,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298348875] [2024-06-20 15:13:31,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:31,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:31,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:31,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:31,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:31,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:31,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 592 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) [2024-06-20 15:13:31,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:31,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:31,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:31,956 INFO L124 PetriNetUnfolderBase]: 969/1603 cut-off events. [2024-06-20 15:13:31,956 INFO L125 PetriNetUnfolderBase]: For 8534/8548 co-relation queries the response was YES. [2024-06-20 15:13:31,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6483 conditions, 1603 events. 969/1603 cut-off events. For 8534/8548 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8024 event pairs, 316 based on Foata normal form. 12/1608 useless extension candidates. Maximal degree in co-relation 6450. Up to 1328 conditions per place. [2024-06-20 15:13:31,968 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 66 selfloop transitions, 33 changer transitions 0/106 dead transitions. [2024-06-20 15:13:31,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 106 transitions, 856 flow [2024-06-20 15:13:31,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:31,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:31,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 15:13:31,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:13:31,970 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 592 flow. Second operand 7 states and 170 transitions. [2024-06-20 15:13:31,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 106 transitions, 856 flow [2024-06-20 15:13:31,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 106 transitions, 808 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:31,993 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 618 flow [2024-06-20 15:13:31,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=618, PETRI_PLACES=80, PETRI_TRANSITIONS=80} [2024-06-20 15:13:31,994 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-20 15:13:31,994 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 618 flow [2024-06-20 15:13:31,994 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) [2024-06-20 15:13:31,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:31,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:31,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:13:31,995 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)] === [2024-06-20 15:13:31,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:31,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1546136027, now seen corresponding path program 1 times [2024-06-20 15:13:31,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:31,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634610396] [2024-06-20 15:13:31,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:31,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:32,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:32,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634610396] [2024-06-20 15:13:32,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634610396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:32,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:32,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:32,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493861139] [2024-06-20 15:13:32,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:32,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:32,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:32,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:32,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:32,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:32,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 618 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:32,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:32,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:32,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:32,416 INFO L124 PetriNetUnfolderBase]: 1072/1755 cut-off events. [2024-06-20 15:13:32,417 INFO L125 PetriNetUnfolderBase]: For 11190/11190 co-relation queries the response was YES. [2024-06-20 15:13:32,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7399 conditions, 1755 events. 1072/1755 cut-off events. For 11190/11190 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8873 event pairs, 227 based on Foata normal form. 4/1748 useless extension candidates. Maximal degree in co-relation 7365. Up to 1264 conditions per place. [2024-06-20 15:13:32,429 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 69 selfloop transitions, 44 changer transitions 0/120 dead transitions. [2024-06-20 15:13:32,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 120 transitions, 1024 flow [2024-06-20 15:13:32,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:32,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:32,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 15:13:32,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464285714285715 [2024-06-20 15:13:32,431 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 618 flow. Second operand 7 states and 181 transitions. [2024-06-20 15:13:32,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 120 transitions, 1024 flow [2024-06-20 15:13:32,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 120 transitions, 936 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:13:32,446 INFO L231 Difference]: Finished difference. Result has 80 places, 84 transitions, 669 flow [2024-06-20 15:13:32,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=669, PETRI_PLACES=80, PETRI_TRANSITIONS=84} [2024-06-20 15:13:32,446 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-20 15:13:32,447 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 84 transitions, 669 flow [2024-06-20 15:13:32,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:32,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:32,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:32,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:13:32,447 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)] === [2024-06-20 15:13:32,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:32,448 INFO L85 PathProgramCache]: Analyzing trace with hash 118948389, now seen corresponding path program 2 times [2024-06-20 15:13:32,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:32,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928900379] [2024-06-20 15:13:32,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:32,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:32,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:32,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928900379] [2024-06-20 15:13:32,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928900379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:32,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:32,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:32,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697810052] [2024-06-20 15:13:32,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:32,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:32,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:32,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:32,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:32,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:32,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 669 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:32,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:32,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:32,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:32,829 INFO L124 PetriNetUnfolderBase]: 1089/1782 cut-off events. [2024-06-20 15:13:32,829 INFO L125 PetriNetUnfolderBase]: For 13181/13181 co-relation queries the response was YES. [2024-06-20 15:13:32,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7812 conditions, 1782 events. 1089/1782 cut-off events. For 13181/13181 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9057 event pairs, 313 based on Foata normal form. 4/1775 useless extension candidates. Maximal degree in co-relation 7777. Up to 1488 conditions per place. [2024-06-20 15:13:32,840 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 68 selfloop transitions, 41 changer transitions 0/116 dead transitions. [2024-06-20 15:13:32,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 116 transitions, 987 flow [2024-06-20 15:13:32,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:32,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:32,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:13:32,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:13:32,841 INFO L175 Difference]: Start difference. First operand has 80 places, 84 transitions, 669 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:13:32,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 116 transitions, 987 flow [2024-06-20 15:13:32,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 116 transitions, 922 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:32,859 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 721 flow [2024-06-20 15:13:32,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=721, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2024-06-20 15:13:32,860 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-20 15:13:32,860 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 721 flow [2024-06-20 15:13:32,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:32,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:32,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:32,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:13:32,861 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:32,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:32,861 INFO L85 PathProgramCache]: Analyzing trace with hash -386090205, now seen corresponding path program 3 times [2024-06-20 15:13:32,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:32,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747044922] [2024-06-20 15:13:32,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:32,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:32,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:32,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747044922] [2024-06-20 15:13:32,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747044922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:32,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:32,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:32,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370708047] [2024-06-20 15:13:32,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:32,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:32,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:32,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:32,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:33,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:33,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 721 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:33,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:33,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:33,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:33,328 INFO L124 PetriNetUnfolderBase]: 1106/1815 cut-off events. [2024-06-20 15:13:33,328 INFO L125 PetriNetUnfolderBase]: For 15359/15359 co-relation queries the response was YES. [2024-06-20 15:13:33,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8229 conditions, 1815 events. 1106/1815 cut-off events. For 15359/15359 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9256 event pairs, 301 based on Foata normal form. 4/1812 useless extension candidates. Maximal degree in co-relation 8192. Up to 1589 conditions per place. [2024-06-20 15:13:33,341 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 84 selfloop transitions, 24 changer transitions 0/115 dead transitions. [2024-06-20 15:13:33,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 115 transitions, 1033 flow [2024-06-20 15:13:33,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:33,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:33,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 15:13:33,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-20 15:13:33,343 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 721 flow. Second operand 7 states and 169 transitions. [2024-06-20 15:13:33,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 115 transitions, 1033 flow [2024-06-20 15:13:33,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 115 transitions, 938 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:33,359 INFO L231 Difference]: Finished difference. Result has 86 places, 88 transitions, 713 flow [2024-06-20 15:13:33,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=713, PETRI_PLACES=86, PETRI_TRANSITIONS=88} [2024-06-20 15:13:33,360 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2024-06-20 15:13:33,360 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 713 flow [2024-06-20 15:13:33,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:33,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:33,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:33,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:13:33,361 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)] === [2024-06-20 15:13:33,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:33,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1370740891, now seen corresponding path program 1 times [2024-06-20 15:13:33,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:33,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344854223] [2024-06-20 15:13:33,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:33,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:33,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:33,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344854223] [2024-06-20 15:13:33,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344854223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:33,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:33,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:33,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426098296] [2024-06-20 15:13:33,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:33,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:33,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:33,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:33,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:33,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:33,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 88 transitions, 713 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) [2024-06-20 15:13:33,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:33,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:33,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:33,664 INFO L124 PetriNetUnfolderBase]: 1071/1772 cut-off events. [2024-06-20 15:13:33,664 INFO L125 PetriNetUnfolderBase]: For 17109/17109 co-relation queries the response was YES. [2024-06-20 15:13:33,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8141 conditions, 1772 events. 1071/1772 cut-off events. For 17109/17109 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9167 event pairs, 292 based on Foata normal form. 3/1754 useless extension candidates. Maximal degree in co-relation 8103. Up to 1511 conditions per place. [2024-06-20 15:13:33,678 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 79 selfloop transitions, 28 changer transitions 0/119 dead transitions. [2024-06-20 15:13:33,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 119 transitions, 1107 flow [2024-06-20 15:13:33,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:33,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:33,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-20 15:13:33,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:13:33,680 INFO L175 Difference]: Start difference. First operand has 86 places, 88 transitions, 713 flow. Second operand 5 states and 130 transitions. [2024-06-20 15:13:33,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 119 transitions, 1107 flow [2024-06-20 15:13:33,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 119 transitions, 1042 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:33,698 INFO L231 Difference]: Finished difference. Result has 87 places, 101 transitions, 816 flow [2024-06-20 15:13:33,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=816, PETRI_PLACES=87, PETRI_TRANSITIONS=101} [2024-06-20 15:13:33,699 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 46 predicate places. [2024-06-20 15:13:33,699 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 101 transitions, 816 flow [2024-06-20 15:13:33,699 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) [2024-06-20 15:13:33,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:33,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:33,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:13:33,700 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:33,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:33,700 INFO L85 PathProgramCache]: Analyzing trace with hash -2037506013, now seen corresponding path program 4 times [2024-06-20 15:13:33,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:33,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547052636] [2024-06-20 15:13:33,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:33,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:33,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:33,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547052636] [2024-06-20 15:13:33,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547052636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:33,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:33,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:33,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960252284] [2024-06-20 15:13:33,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:33,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:33,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:33,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:33,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:33,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:33,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 101 transitions, 816 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:33,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:33,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:33,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:34,112 INFO L124 PetriNetUnfolderBase]: 1093/1791 cut-off events. [2024-06-20 15:13:34,112 INFO L125 PetriNetUnfolderBase]: For 18924/18924 co-relation queries the response was YES. [2024-06-20 15:13:34,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8360 conditions, 1791 events. 1093/1791 cut-off events. For 18924/18924 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9084 event pairs, 196 based on Foata normal form. 20/1804 useless extension candidates. Maximal degree in co-relation 8320. Up to 1369 conditions per place. [2024-06-20 15:13:34,123 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 87 selfloop transitions, 40 changer transitions 0/134 dead transitions. [2024-06-20 15:13:34,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 134 transitions, 1162 flow [2024-06-20 15:13:34,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:34,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:34,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:13:34,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-20 15:13:34,125 INFO L175 Difference]: Start difference. First operand has 87 places, 101 transitions, 816 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:13:34,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 134 transitions, 1162 flow [2024-06-20 15:13:34,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 134 transitions, 1136 flow, removed 13 selfloop flow, removed 0 redundant places. [2024-06-20 15:13:34,144 INFO L231 Difference]: Finished difference. Result has 94 places, 101 transitions, 884 flow [2024-06-20 15:13:34,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=884, PETRI_PLACES=94, PETRI_TRANSITIONS=101} [2024-06-20 15:13:34,145 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2024-06-20 15:13:34,145 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 101 transitions, 884 flow [2024-06-20 15:13:34,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:34,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:34,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:34,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:13:34,145 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:34,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:34,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1607104067, now seen corresponding path program 1 times [2024-06-20 15:13:34,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:34,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716635188] [2024-06-20 15:13:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:34,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:34,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:34,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716635188] [2024-06-20 15:13:34,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716635188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:34,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:34,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:34,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114074579] [2024-06-20 15:13:34,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:34,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:34,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:34,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:34,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:34,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:34,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 101 transitions, 884 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) [2024-06-20 15:13:34,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:34,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:34,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:34,472 INFO L124 PetriNetUnfolderBase]: 1110/1818 cut-off events. [2024-06-20 15:13:34,472 INFO L125 PetriNetUnfolderBase]: For 19375/19375 co-relation queries the response was YES. [2024-06-20 15:13:34,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8757 conditions, 1818 events. 1110/1818 cut-off events. For 19375/19375 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9232 event pairs, 287 based on Foata normal form. 4/1815 useless extension candidates. Maximal degree in co-relation 8714. Up to 1601 conditions per place. [2024-06-20 15:13:34,486 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 95 selfloop transitions, 20 changer transitions 0/122 dead transitions. [2024-06-20 15:13:34,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 122 transitions, 1184 flow [2024-06-20 15:13:34,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:34,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:34,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-20 15:13:34,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-20 15:13:34,487 INFO L175 Difference]: Start difference. First operand has 94 places, 101 transitions, 884 flow. Second operand 5 states and 127 transitions. [2024-06-20 15:13:34,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 122 transitions, 1184 flow [2024-06-20 15:13:34,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 122 transitions, 1093 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:34,512 INFO L231 Difference]: Finished difference. Result has 93 places, 103 transitions, 866 flow [2024-06-20 15:13:34,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=866, PETRI_PLACES=93, PETRI_TRANSITIONS=103} [2024-06-20 15:13:34,513 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 52 predicate places. [2024-06-20 15:13:34,513 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 103 transitions, 866 flow [2024-06-20 15:13:34,513 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) [2024-06-20 15:13:34,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:34,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:34,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:13:34,513 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:34,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:34,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1598533187, now seen corresponding path program 2 times [2024-06-20 15:13:34,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:34,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492353600] [2024-06-20 15:13:34,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:34,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:34,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:34,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492353600] [2024-06-20 15:13:34,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492353600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:34,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:34,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:34,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25048863] [2024-06-20 15:13:34,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:34,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:34,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:34,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:34,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:34,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:34,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 103 transitions, 866 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) [2024-06-20 15:13:34,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:34,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:34,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:34,826 INFO L124 PetriNetUnfolderBase]: 1102/1813 cut-off events. [2024-06-20 15:13:34,826 INFO L125 PetriNetUnfolderBase]: For 19057/19068 co-relation queries the response was YES. [2024-06-20 15:13:34,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8604 conditions, 1813 events. 1102/1813 cut-off events. For 19057/19068 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9247 event pairs, 275 based on Foata normal form. 12/1817 useless extension candidates. Maximal degree in co-relation 8560. Up to 1530 conditions per place. [2024-06-20 15:13:34,840 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 95 selfloop transitions, 20 changer transitions 0/122 dead transitions. [2024-06-20 15:13:34,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 122 transitions, 1164 flow [2024-06-20 15:13:34,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:34,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:34,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-20 15:13:34,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-20 15:13:34,843 INFO L175 Difference]: Start difference. First operand has 93 places, 103 transitions, 866 flow. Second operand 5 states and 123 transitions. [2024-06-20 15:13:34,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 122 transitions, 1164 flow [2024-06-20 15:13:34,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 122 transitions, 1109 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:34,863 INFO L231 Difference]: Finished difference. Result has 95 places, 105 transitions, 888 flow [2024-06-20 15:13:34,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=888, PETRI_PLACES=95, PETRI_TRANSITIONS=105} [2024-06-20 15:13:34,864 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-20 15:13:34,864 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 105 transitions, 888 flow [2024-06-20 15:13:34,865 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) [2024-06-20 15:13:34,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:34,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:34,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:13:34,865 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)] === [2024-06-20 15:13:34,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:34,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1979878801, now seen corresponding path program 2 times [2024-06-20 15:13:34,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:34,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662215758] [2024-06-20 15:13:34,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:34,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:34,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:34,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662215758] [2024-06-20 15:13:34,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662215758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:34,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:34,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:34,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864559562] [2024-06-20 15:13:34,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:34,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:34,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:34,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:34,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:35,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:35,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 105 transitions, 888 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) [2024-06-20 15:13:35,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:35,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:35,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:35,190 INFO L124 PetriNetUnfolderBase]: 1092/1813 cut-off events. [2024-06-20 15:13:35,190 INFO L125 PetriNetUnfolderBase]: For 21175/21175 co-relation queries the response was YES. [2024-06-20 15:13:35,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8844 conditions, 1813 events. 1092/1813 cut-off events. For 21175/21175 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9399 event pairs, 272 based on Foata normal form. 6/1802 useless extension candidates. Maximal degree in co-relation 8799. Up to 1536 conditions per place. [2024-06-20 15:13:35,225 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 91 selfloop transitions, 37 changer transitions 0/140 dead transitions. [2024-06-20 15:13:35,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 140 transitions, 1353 flow [2024-06-20 15:13:35,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:35,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:35,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-20 15:13:35,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.67 [2024-06-20 15:13:35,227 INFO L175 Difference]: Start difference. First operand has 95 places, 105 transitions, 888 flow. Second operand 5 states and 134 transitions. [2024-06-20 15:13:35,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 140 transitions, 1353 flow [2024-06-20 15:13:35,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 140 transitions, 1294 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:35,249 INFO L231 Difference]: Finished difference. Result has 98 places, 120 transitions, 1093 flow [2024-06-20 15:13:35,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1093, PETRI_PLACES=98, PETRI_TRANSITIONS=120} [2024-06-20 15:13:35,250 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-20 15:13:35,250 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 120 transitions, 1093 flow [2024-06-20 15:13:35,250 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) [2024-06-20 15:13:35,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:35,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:35,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:13:35,251 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:35,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:35,251 INFO L85 PathProgramCache]: Analyzing trace with hash -696131705, now seen corresponding path program 1 times [2024-06-20 15:13:35,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:35,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380627519] [2024-06-20 15:13:35,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:35,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:35,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:35,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380627519] [2024-06-20 15:13:35,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380627519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:35,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:35,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:35,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209930163] [2024-06-20 15:13:35,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:35,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:35,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:35,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:35,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:35,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:35,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 120 transitions, 1093 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:35,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:35,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:35,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:35,653 INFO L124 PetriNetUnfolderBase]: 1254/2077 cut-off events. [2024-06-20 15:13:35,653 INFO L125 PetriNetUnfolderBase]: For 28432/28443 co-relation queries the response was YES. [2024-06-20 15:13:35,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10615 conditions, 2077 events. 1254/2077 cut-off events. For 28432/28443 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11119 event pairs, 230 based on Foata normal form. 20/2089 useless extension candidates. Maximal degree in co-relation 10568. Up to 1322 conditions per place. [2024-06-20 15:13:35,670 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 111 selfloop transitions, 40 changer transitions 0/158 dead transitions. [2024-06-20 15:13:35,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 158 transitions, 1605 flow [2024-06-20 15:13:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:35,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:35,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:13:35,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-20 15:13:35,672 INFO L175 Difference]: Start difference. First operand has 98 places, 120 transitions, 1093 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:13:35,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 158 transitions, 1605 flow [2024-06-20 15:13:35,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 158 transitions, 1583 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:35,701 INFO L231 Difference]: Finished difference. Result has 104 places, 122 transitions, 1195 flow [2024-06-20 15:13:35,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1195, PETRI_PLACES=104, PETRI_TRANSITIONS=122} [2024-06-20 15:13:35,701 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-20 15:13:35,702 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 122 transitions, 1195 flow [2024-06-20 15:13:35,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:35,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:35,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:35,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:13:35,702 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:35,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:35,703 INFO L85 PathProgramCache]: Analyzing trace with hash -597009529, now seen corresponding path program 2 times [2024-06-20 15:13:35,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:35,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851196077] [2024-06-20 15:13:35,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:35,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:35,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:35,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851196077] [2024-06-20 15:13:35,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851196077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:35,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:35,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:35,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085649886] [2024-06-20 15:13:35,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:35,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:35,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:35,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:35,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:35,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:35,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 122 transitions, 1195 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:35,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:35,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:35,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:36,231 INFO L124 PetriNetUnfolderBase]: 1381/2290 cut-off events. [2024-06-20 15:13:36,232 INFO L125 PetriNetUnfolderBase]: For 35355/35366 co-relation queries the response was YES. [2024-06-20 15:13:36,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12155 conditions, 2290 events. 1381/2290 cut-off events. For 35355/35366 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12573 event pairs, 359 based on Foata normal form. 20/2302 useless extension candidates. Maximal degree in co-relation 12106. Up to 1766 conditions per place. [2024-06-20 15:13:36,250 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 116 selfloop transitions, 36 changer transitions 0/159 dead transitions. [2024-06-20 15:13:36,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 159 transitions, 1715 flow [2024-06-20 15:13:36,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:36,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:36,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:13:36,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-20 15:13:36,253 INFO L175 Difference]: Start difference. First operand has 104 places, 122 transitions, 1195 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:13:36,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 159 transitions, 1715 flow [2024-06-20 15:13:36,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 159 transitions, 1665 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:36,293 INFO L231 Difference]: Finished difference. Result has 108 places, 124 transitions, 1265 flow [2024-06-20 15:13:36,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1265, PETRI_PLACES=108, PETRI_TRANSITIONS=124} [2024-06-20 15:13:36,294 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-20 15:13:36,294 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 124 transitions, 1265 flow [2024-06-20 15:13:36,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:36,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:36,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:36,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:13:36,296 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:36,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:36,296 INFO L85 PathProgramCache]: Analyzing trace with hash -596861659, now seen corresponding path program 3 times [2024-06-20 15:13:36,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:36,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534976002] [2024-06-20 15:13:36,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:36,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:36,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:36,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534976002] [2024-06-20 15:13:36,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534976002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:36,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:36,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:36,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631368212] [2024-06-20 15:13:36,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:36,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:36,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:36,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:36,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:36,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:36,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 124 transitions, 1265 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:36,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:36,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:36,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:36,785 INFO L124 PetriNetUnfolderBase]: 1353/2246 cut-off events. [2024-06-20 15:13:36,785 INFO L125 PetriNetUnfolderBase]: For 36453/36464 co-relation queries the response was YES. [2024-06-20 15:13:36,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11923 conditions, 2246 events. 1353/2246 cut-off events. For 36453/36464 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12262 event pairs, 358 based on Foata normal form. 24/2262 useless extension candidates. Maximal degree in co-relation 11872. Up to 1845 conditions per place. [2024-06-20 15:13:36,802 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 113 selfloop transitions, 34 changer transitions 0/154 dead transitions. [2024-06-20 15:13:36,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 154 transitions, 1645 flow [2024-06-20 15:13:36,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:36,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:36,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:13:36,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-20 15:13:36,804 INFO L175 Difference]: Start difference. First operand has 108 places, 124 transitions, 1265 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:13:36,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 154 transitions, 1645 flow [2024-06-20 15:13:36,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 154 transitions, 1588 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:36,851 INFO L231 Difference]: Finished difference. Result has 112 places, 124 transitions, 1283 flow [2024-06-20 15:13:36,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1208, PETRI_DIFFERENCE_MINUEND_PLACES=105, 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=7, PETRI_FLOW=1283, PETRI_PLACES=112, PETRI_TRANSITIONS=124} [2024-06-20 15:13:36,851 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-20 15:13:36,852 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 124 transitions, 1283 flow [2024-06-20 15:13:36,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:36,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:36,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:36,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:13:36,852 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)] === [2024-06-20 15:13:36,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:36,853 INFO L85 PathProgramCache]: Analyzing trace with hash -93838727, now seen corresponding path program 1 times [2024-06-20 15:13:36,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:36,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97804752] [2024-06-20 15:13:36,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:36,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:36,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:36,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97804752] [2024-06-20 15:13:36,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97804752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:36,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:36,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:36,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347019334] [2024-06-20 15:13:36,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:36,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:36,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:36,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:36,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:37,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:37,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 124 transitions, 1283 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) [2024-06-20 15:13:37,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:37,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:37,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:37,247 INFO L124 PetriNetUnfolderBase]: 1358/2269 cut-off events. [2024-06-20 15:13:37,248 INFO L125 PetriNetUnfolderBase]: For 35027/35027 co-relation queries the response was YES. [2024-06-20 15:13:37,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12103 conditions, 2269 events. 1358/2269 cut-off events. For 35027/35027 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12473 event pairs, 329 based on Foata normal form. 1/2268 useless extension candidates. Maximal degree in co-relation 12050. Up to 2053 conditions per place. [2024-06-20 15:13:37,266 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 132 selfloop transitions, 22 changer transitions 0/161 dead transitions. [2024-06-20 15:13:37,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 161 transitions, 1779 flow [2024-06-20 15:13:37,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:37,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:37,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 15:13:37,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-20 15:13:37,268 INFO L175 Difference]: Start difference. First operand has 112 places, 124 transitions, 1283 flow. Second operand 6 states and 146 transitions. [2024-06-20 15:13:37,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 161 transitions, 1779 flow [2024-06-20 15:13:37,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 161 transitions, 1706 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:37,318 INFO L231 Difference]: Finished difference. Result has 114 places, 138 transitions, 1381 flow [2024-06-20 15:13:37,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1381, PETRI_PLACES=114, PETRI_TRANSITIONS=138} [2024-06-20 15:13:37,318 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-20 15:13:37,319 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 138 transitions, 1381 flow [2024-06-20 15:13:37,319 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) [2024-06-20 15:13:37,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:37,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:37,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:13:37,319 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:37,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:37,320 INFO L85 PathProgramCache]: Analyzing trace with hash 916254695, now seen corresponding path program 4 times [2024-06-20 15:13:37,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:37,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157279683] [2024-06-20 15:13:37,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:37,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:37,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:37,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157279683] [2024-06-20 15:13:37,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157279683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:37,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:37,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:37,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667017514] [2024-06-20 15:13:37,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:37,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:37,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:37,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:37,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:37,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:37,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 138 transitions, 1381 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:37,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:37,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:37,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:37,775 INFO L124 PetriNetUnfolderBase]: 1416/2371 cut-off events. [2024-06-20 15:13:37,776 INFO L125 PetriNetUnfolderBase]: For 42250/42261 co-relation queries the response was YES. [2024-06-20 15:13:37,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12843 conditions, 2371 events. 1416/2371 cut-off events. For 42250/42261 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 13285 event pairs, 369 based on Foata normal form. 24/2387 useless extension candidates. Maximal degree in co-relation 12787. Up to 1968 conditions per place. [2024-06-20 15:13:37,794 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 128 selfloop transitions, 30 changer transitions 0/165 dead transitions. [2024-06-20 15:13:37,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 165 transitions, 1797 flow [2024-06-20 15:13:37,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:37,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:37,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 15:13:37,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:13:37,795 INFO L175 Difference]: Start difference. First operand has 114 places, 138 transitions, 1381 flow. Second operand 6 states and 150 transitions. [2024-06-20 15:13:37,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 165 transitions, 1797 flow [2024-06-20 15:13:37,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 165 transitions, 1777 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-20 15:13:37,842 INFO L231 Difference]: Finished difference. Result has 120 places, 139 transitions, 1452 flow [2024-06-20 15:13:37,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1452, PETRI_PLACES=120, PETRI_TRANSITIONS=139} [2024-06-20 15:13:37,843 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-20 15:13:37,843 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 139 transitions, 1452 flow [2024-06-20 15:13:37,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:37,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:37,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:37,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:13:37,843 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:37,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:37,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1165472049, now seen corresponding path program 5 times [2024-06-20 15:13:37,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:37,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368408564] [2024-06-20 15:13:37,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:37,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:37,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:37,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:37,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368408564] [2024-06-20 15:13:37,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368408564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:37,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:37,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:37,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084676091] [2024-06-20 15:13:37,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:37,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:37,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:37,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:37,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:37,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:37,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 139 transitions, 1452 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:37,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:37,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:37,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:38,355 INFO L124 PetriNetUnfolderBase]: 1449/2442 cut-off events. [2024-06-20 15:13:38,355 INFO L125 PetriNetUnfolderBase]: For 45782/45796 co-relation queries the response was YES. [2024-06-20 15:13:38,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13284 conditions, 2442 events. 1449/2442 cut-off events. For 45782/45796 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13891 event pairs, 374 based on Foata normal form. 26/2461 useless extension candidates. Maximal degree in co-relation 13225. Up to 2027 conditions per place. [2024-06-20 15:13:38,373 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 133 selfloop transitions, 34 changer transitions 0/174 dead transitions. [2024-06-20 15:13:38,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 174 transitions, 1908 flow [2024-06-20 15:13:38,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:38,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:13:38,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-20 15:13:38,374 INFO L175 Difference]: Start difference. First operand has 120 places, 139 transitions, 1452 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:13:38,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 174 transitions, 1908 flow [2024-06-20 15:13:38,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 174 transitions, 1839 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:38,427 INFO L231 Difference]: Finished difference. Result has 124 places, 140 transitions, 1484 flow [2024-06-20 15:13:38,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1383, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1484, PETRI_PLACES=124, PETRI_TRANSITIONS=140} [2024-06-20 15:13:38,427 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-20 15:13:38,428 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 140 transitions, 1484 flow [2024-06-20 15:13:38,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:38,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:38,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:38,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:13:38,428 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:38,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:38,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1159961799, now seen corresponding path program 6 times [2024-06-20 15:13:38,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:38,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610010990] [2024-06-20 15:13:38,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:38,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:38,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:38,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610010990] [2024-06-20 15:13:38,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610010990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:38,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:38,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:38,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795898946] [2024-06-20 15:13:38,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:38,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:38,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:38,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:38,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:38,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:38,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 140 transitions, 1484 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:38,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:38,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:38,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:38,913 INFO L124 PetriNetUnfolderBase]: 1429/2408 cut-off events. [2024-06-20 15:13:38,913 INFO L125 PetriNetUnfolderBase]: For 44482/44493 co-relation queries the response was YES. [2024-06-20 15:13:38,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12952 conditions, 2408 events. 1429/2408 cut-off events. For 44482/44493 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13681 event pairs, 273 based on Foata normal form. 20/2420 useless extension candidates. Maximal degree in co-relation 12892. Up to 1666 conditions per place. [2024-06-20 15:13:38,933 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 126 selfloop transitions, 36 changer transitions 0/169 dead transitions. [2024-06-20 15:13:38,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 169 transitions, 1900 flow [2024-06-20 15:13:38,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:38,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:38,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:13:38,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-20 15:13:38,934 INFO L175 Difference]: Start difference. First operand has 124 places, 140 transitions, 1484 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:13:38,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 169 transitions, 1900 flow [2024-06-20 15:13:38,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 169 transitions, 1815 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:38,988 INFO L231 Difference]: Finished difference. Result has 124 places, 140 transitions, 1478 flow [2024-06-20 15:13:38,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1478, PETRI_PLACES=124, PETRI_TRANSITIONS=140} [2024-06-20 15:13:38,988 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-20 15:13:38,988 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 140 transitions, 1478 flow [2024-06-20 15:13:38,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:38,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:38,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:38,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:13:38,989 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:38,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:38,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1165687251, now seen corresponding path program 1 times [2024-06-20 15:13:38,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:38,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006420511] [2024-06-20 15:13:38,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:38,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:39,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:39,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006420511] [2024-06-20 15:13:39,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006420511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:39,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:39,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:39,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803272119] [2024-06-20 15:13:39,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:39,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:39,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:39,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:39,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:39,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:39,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 140 transitions, 1478 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:39,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:39,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:39,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:39,472 INFO L124 PetriNetUnfolderBase]: 1470/2491 cut-off events. [2024-06-20 15:13:39,472 INFO L125 PetriNetUnfolderBase]: For 47075/47089 co-relation queries the response was YES. [2024-06-20 15:13:39,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13298 conditions, 2491 events. 1470/2491 cut-off events. For 47075/47089 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 14304 event pairs, 331 based on Foata normal form. 22/2506 useless extension candidates. Maximal degree in co-relation 13237. Up to 1869 conditions per place. [2024-06-20 15:13:39,489 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 132 selfloop transitions, 39 changer transitions 0/178 dead transitions. [2024-06-20 15:13:39,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 178 transitions, 1950 flow [2024-06-20 15:13:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:39,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:39,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-20 15:13:39,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-20 15:13:39,491 INFO L175 Difference]: Start difference. First operand has 124 places, 140 transitions, 1478 flow. Second operand 8 states and 196 transitions. [2024-06-20 15:13:39,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 178 transitions, 1950 flow [2024-06-20 15:13:39,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 178 transitions, 1821 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:39,563 INFO L231 Difference]: Finished difference. Result has 126 places, 141 transitions, 1455 flow [2024-06-20 15:13:39,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1455, PETRI_PLACES=126, PETRI_TRANSITIONS=141} [2024-06-20 15:13:39,567 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-20 15:13:39,567 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 141 transitions, 1455 flow [2024-06-20 15:13:39,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:39,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:39,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:39,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:13:39,568 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)] === [2024-06-20 15:13:39,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:39,568 INFO L85 PathProgramCache]: Analyzing trace with hash -73877765, now seen corresponding path program 1 times [2024-06-20 15:13:39,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:39,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707026875] [2024-06-20 15:13:39,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:39,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:39,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:39,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707026875] [2024-06-20 15:13:39,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707026875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:39,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:39,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:39,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303490093] [2024-06-20 15:13:39,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:39,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:39,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:39,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:39,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:39,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:39,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 141 transitions, 1455 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) [2024-06-20 15:13:39,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:39,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:39,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:39,979 INFO L124 PetriNetUnfolderBase]: 1441/2451 cut-off events. [2024-06-20 15:13:39,979 INFO L125 PetriNetUnfolderBase]: For 46879/46879 co-relation queries the response was YES. [2024-06-20 15:13:39,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13112 conditions, 2451 events. 1441/2451 cut-off events. For 46879/46879 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14173 event pairs, 362 based on Foata normal form. 3/2433 useless extension candidates. Maximal degree in co-relation 13051. Up to 2035 conditions per place. [2024-06-20 15:13:39,998 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 98 selfloop transitions, 57 changer transitions 0/171 dead transitions. [2024-06-20 15:13:39,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 171 transitions, 2041 flow [2024-06-20 15:13:39,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:39,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 15:13:39,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-20 15:13:39,999 INFO L175 Difference]: Start difference. First operand has 126 places, 141 transitions, 1455 flow. Second operand 6 states and 152 transitions. [2024-06-20 15:13:39,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 171 transitions, 2041 flow [2024-06-20 15:13:40,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 171 transitions, 1951 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:40,063 INFO L231 Difference]: Finished difference. Result has 127 places, 153 transitions, 1656 flow [2024-06-20 15:13:40,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1656, PETRI_PLACES=127, PETRI_TRANSITIONS=153} [2024-06-20 15:13:40,065 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 86 predicate places. [2024-06-20 15:13:40,065 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 153 transitions, 1656 flow [2024-06-20 15:13:40,065 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) [2024-06-20 15:13:40,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:40,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:40,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:13:40,066 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)] === [2024-06-20 15:13:40,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:40,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1600963011, now seen corresponding path program 2 times [2024-06-20 15:13:40,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:40,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895656294] [2024-06-20 15:13:40,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:40,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:40,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:40,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895656294] [2024-06-20 15:13:40,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895656294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:40,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:40,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:40,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10424959] [2024-06-20 15:13:40,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:40,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:40,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:40,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:40,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:40,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:40,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 153 transitions, 1656 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) [2024-06-20 15:13:40,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:40,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:40,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:40,536 INFO L124 PetriNetUnfolderBase]: 1498/2532 cut-off events. [2024-06-20 15:13:40,536 INFO L125 PetriNetUnfolderBase]: For 49498/49498 co-relation queries the response was YES. [2024-06-20 15:13:40,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13905 conditions, 2532 events. 1498/2532 cut-off events. For 49498/49498 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 14537 event pairs, 352 based on Foata normal form. 1/2531 useless extension candidates. Maximal degree in co-relation 13842. Up to 2287 conditions per place. [2024-06-20 15:13:40,554 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 142 selfloop transitions, 25 changer transitions 0/174 dead transitions. [2024-06-20 15:13:40,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 174 transitions, 2113 flow [2024-06-20 15:13:40,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:40,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-20 15:13:40,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:13:40,556 INFO L175 Difference]: Start difference. First operand has 127 places, 153 transitions, 1656 flow. Second operand 6 states and 141 transitions. [2024-06-20 15:13:40,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 174 transitions, 2113 flow [2024-06-20 15:13:40,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 174 transitions, 2058 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:40,618 INFO L231 Difference]: Finished difference. Result has 132 places, 157 transitions, 1684 flow [2024-06-20 15:13:40,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1601, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1684, PETRI_PLACES=132, PETRI_TRANSITIONS=157} [2024-06-20 15:13:40,619 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-06-20 15:13:40,619 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 157 transitions, 1684 flow [2024-06-20 15:13:40,619 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) [2024-06-20 15:13:40,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:40,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:40,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:13:40,620 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:40,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:40,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1955617545, now seen corresponding path program 2 times [2024-06-20 15:13:40,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:40,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074145752] [2024-06-20 15:13:40,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:40,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:40,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:40,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:40,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074145752] [2024-06-20 15:13:40,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074145752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:40,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:40,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:40,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629803654] [2024-06-20 15:13:40,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:40,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:40,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:40,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:40,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:40,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:40,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 157 transitions, 1684 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:40,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:40,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:40,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:41,122 INFO L124 PetriNetUnfolderBase]: 1539/2610 cut-off events. [2024-06-20 15:13:41,123 INFO L125 PetriNetUnfolderBase]: For 55704/55704 co-relation queries the response was YES. [2024-06-20 15:13:41,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14026 conditions, 2610 events. 1539/2610 cut-off events. For 55704/55704 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15181 event pairs, 268 based on Foata normal form. 12/2615 useless extension candidates. Maximal degree in co-relation 13960. Up to 2023 conditions per place. [2024-06-20 15:13:41,143 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 148 selfloop transitions, 43 changer transitions 0/198 dead transitions. [2024-06-20 15:13:41,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 198 transitions, 2206 flow [2024-06-20 15:13:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:41,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:41,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 15:13:41,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-06-20 15:13:41,144 INFO L175 Difference]: Start difference. First operand has 132 places, 157 transitions, 1684 flow. Second operand 8 states and 201 transitions. [2024-06-20 15:13:41,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 198 transitions, 2206 flow [2024-06-20 15:13:41,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 198 transitions, 2170 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:41,235 INFO L231 Difference]: Finished difference. Result has 138 places, 158 transitions, 1764 flow [2024-06-20 15:13:41,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1648, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1764, PETRI_PLACES=138, PETRI_TRANSITIONS=158} [2024-06-20 15:13:41,235 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-20 15:13:41,235 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 158 transitions, 1764 flow [2024-06-20 15:13:41,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:41,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:41,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:41,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:13:41,236 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:41,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:41,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1985079861, now seen corresponding path program 3 times [2024-06-20 15:13:41,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:41,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751383597] [2024-06-20 15:13:41,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:41,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:41,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:41,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751383597] [2024-06-20 15:13:41,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751383597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:41,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:41,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:41,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479452464] [2024-06-20 15:13:41,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:41,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:41,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:41,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:41,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:41,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:41,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 158 transitions, 1764 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:41,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:41,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:41,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:41,785 INFO L124 PetriNetUnfolderBase]: 1519/2585 cut-off events. [2024-06-20 15:13:41,785 INFO L125 PetriNetUnfolderBase]: For 56603/56614 co-relation queries the response was YES. [2024-06-20 15:13:41,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13896 conditions, 2585 events. 1519/2585 cut-off events. For 56603/56614 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15069 event pairs, 259 based on Foata normal form. 20/2597 useless extension candidates. Maximal degree in co-relation 13829. Up to 1531 conditions per place. [2024-06-20 15:13:41,809 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 142 selfloop transitions, 42 changer transitions 0/191 dead transitions. [2024-06-20 15:13:41,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 191 transitions, 2184 flow [2024-06-20 15:13:41,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:41,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:41,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:13:41,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:13:41,811 INFO L175 Difference]: Start difference. First operand has 138 places, 158 transitions, 1764 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:13:41,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 191 transitions, 2184 flow [2024-06-20 15:13:41,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 191 transitions, 2078 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:41,885 INFO L231 Difference]: Finished difference. Result has 138 places, 157 transitions, 1696 flow [2024-06-20 15:13:41,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1608, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1696, PETRI_PLACES=138, PETRI_TRANSITIONS=157} [2024-06-20 15:13:41,885 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-20 15:13:41,885 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 157 transitions, 1696 flow [2024-06-20 15:13:41,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:41,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:41,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:41,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:13:41,886 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)] === [2024-06-20 15:13:41,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:41,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1246699971, now seen corresponding path program 3 times [2024-06-20 15:13:41,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:41,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740234660] [2024-06-20 15:13:41,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:41,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:42,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:42,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:42,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740234660] [2024-06-20 15:13:42,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740234660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:42,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:42,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:42,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144841637] [2024-06-20 15:13:42,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:42,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:42,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:42,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:42,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:42,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:42,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 157 transitions, 1696 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) [2024-06-20 15:13:42,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:42,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:42,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:42,389 INFO L124 PetriNetUnfolderBase]: 1521/2586 cut-off events. [2024-06-20 15:13:42,389 INFO L125 PetriNetUnfolderBase]: For 51053/51053 co-relation queries the response was YES. [2024-06-20 15:13:42,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13786 conditions, 2586 events. 1521/2586 cut-off events. For 51053/51053 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15058 event pairs, 354 based on Foata normal form. 2/2586 useless extension candidates. Maximal degree in co-relation 13718. Up to 2330 conditions per place. [2024-06-20 15:13:42,414 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 154 selfloop transitions, 26 changer transitions 0/187 dead transitions. [2024-06-20 15:13:42,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 187 transitions, 2179 flow [2024-06-20 15:13:42,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:42,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:42,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-20 15:13:42,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-20 15:13:42,416 INFO L175 Difference]: Start difference. First operand has 138 places, 157 transitions, 1696 flow. Second operand 5 states and 129 transitions. [2024-06-20 15:13:42,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 187 transitions, 2179 flow [2024-06-20 15:13:42,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 187 transitions, 2034 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 15:13:42,527 INFO L231 Difference]: Finished difference. Result has 138 places, 166 transitions, 1720 flow [2024-06-20 15:13:42,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1551, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1720, PETRI_PLACES=138, PETRI_TRANSITIONS=166} [2024-06-20 15:13:42,527 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-20 15:13:42,527 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 166 transitions, 1720 flow [2024-06-20 15:13:42,528 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) [2024-06-20 15:13:42,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:42,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:42,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:13:42,528 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)] === [2024-06-20 15:13:42,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:42,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1105900367, now seen corresponding path program 2 times [2024-06-20 15:13:42,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:42,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327491034] [2024-06-20 15:13:42,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:42,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:42,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:42,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327491034] [2024-06-20 15:13:42,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327491034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:42,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:42,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:42,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920077337] [2024-06-20 15:13:42,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:42,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:42,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:42,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:42,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:42,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:42,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 166 transitions, 1720 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) [2024-06-20 15:13:42,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:42,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:42,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:43,052 INFO L124 PetriNetUnfolderBase]: 1498/2566 cut-off events. [2024-06-20 15:13:43,053 INFO L125 PetriNetUnfolderBase]: For 54081/54081 co-relation queries the response was YES. [2024-06-20 15:13:43,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13664 conditions, 2566 events. 1498/2566 cut-off events. For 54081/54081 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 15079 event pairs, 353 based on Foata normal form. 3/2552 useless extension candidates. Maximal degree in co-relation 13595. Up to 2165 conditions per place. [2024-06-20 15:13:43,078 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 123 selfloop transitions, 54 changer transitions 0/198 dead transitions. [2024-06-20 15:13:43,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 198 transitions, 2379 flow [2024-06-20 15:13:43,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:43,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:43,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-20 15:13:43,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-20 15:13:43,079 INFO L175 Difference]: Start difference. First operand has 138 places, 166 transitions, 1720 flow. Second operand 6 states and 154 transitions. [2024-06-20 15:13:43,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 198 transitions, 2379 flow [2024-06-20 15:13:43,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 198 transitions, 2369 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-20 15:13:43,209 INFO L231 Difference]: Finished difference. Result has 145 places, 176 transitions, 1986 flow [2024-06-20 15:13:43,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1710, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1986, PETRI_PLACES=145, PETRI_TRANSITIONS=176} [2024-06-20 15:13:43,210 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-20 15:13:43,210 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 176 transitions, 1986 flow [2024-06-20 15:13:43,210 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) [2024-06-20 15:13:43,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:43,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:43,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:13:43,210 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)] === [2024-06-20 15:13:43,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:43,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1369809045, now seen corresponding path program 1 times [2024-06-20 15:13:43,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:43,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534080865] [2024-06-20 15:13:43,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:43,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:43,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:43,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534080865] [2024-06-20 15:13:43,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534080865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:43,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:43,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:43,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901423799] [2024-06-20 15:13:43,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:43,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:43,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:43,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:43,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:43,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:43,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 176 transitions, 1986 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) [2024-06-20 15:13:43,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:43,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:43,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:43,648 INFO L124 PetriNetUnfolderBase]: 1548/2641 cut-off events. [2024-06-20 15:13:43,648 INFO L125 PetriNetUnfolderBase]: For 58603/58617 co-relation queries the response was YES. [2024-06-20 15:13:43,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14395 conditions, 2641 events. 1548/2641 cut-off events. For 58603/58617 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 15576 event pairs, 381 based on Foata normal form. 12/2646 useless extension candidates. Maximal degree in co-relation 14322. Up to 2287 conditions per place. [2024-06-20 15:13:43,671 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 147 selfloop transitions, 41 changer transitions 0/195 dead transitions. [2024-06-20 15:13:43,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 195 transitions, 2577 flow [2024-06-20 15:13:43,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:43,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:43,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-20 15:13:43,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-20 15:13:43,672 INFO L175 Difference]: Start difference. First operand has 145 places, 176 transitions, 1986 flow. Second operand 5 states and 123 transitions. [2024-06-20 15:13:43,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 195 transitions, 2577 flow [2024-06-20 15:13:43,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 195 transitions, 2531 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:43,800 INFO L231 Difference]: Finished difference. Result has 150 places, 181 transitions, 2117 flow [2024-06-20 15:13:43,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1941, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2117, PETRI_PLACES=150, PETRI_TRANSITIONS=181} [2024-06-20 15:13:43,800 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-20 15:13:43,800 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 181 transitions, 2117 flow [2024-06-20 15:13:43,800 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) [2024-06-20 15:13:43,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:43,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:43,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:13:43,801 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)] === [2024-06-20 15:13:43,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:43,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1390254165, now seen corresponding path program 2 times [2024-06-20 15:13:43,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:43,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206108597] [2024-06-20 15:13:43,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:43,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:43,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:43,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206108597] [2024-06-20 15:13:43,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206108597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:43,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:43,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:43,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008073009] [2024-06-20 15:13:43,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:43,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:43,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:43,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:43,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:43,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:43,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 181 transitions, 2117 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) [2024-06-20 15:13:43,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:43,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:43,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:44,252 INFO L124 PetriNetUnfolderBase]: 1530/2608 cut-off events. [2024-06-20 15:13:44,252 INFO L125 PetriNetUnfolderBase]: For 59088/59091 co-relation queries the response was YES. [2024-06-20 15:13:44,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14336 conditions, 2608 events. 1530/2608 cut-off events. For 59088/59091 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 15260 event pairs, 358 based on Foata normal form. 6/2611 useless extension candidates. Maximal degree in co-relation 14260. Up to 2267 conditions per place. [2024-06-20 15:13:44,275 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 147 selfloop transitions, 45 changer transitions 0/199 dead transitions. [2024-06-20 15:13:44,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 199 transitions, 2547 flow [2024-06-20 15:13:44,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:44,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-20 15:13:44,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:13:44,276 INFO L175 Difference]: Start difference. First operand has 150 places, 181 transitions, 2117 flow. Second operand 5 states and 130 transitions. [2024-06-20 15:13:44,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 199 transitions, 2547 flow [2024-06-20 15:13:44,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 199 transitions, 2468 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:44,385 INFO L231 Difference]: Finished difference. Result has 154 places, 181 transitions, 2149 flow [2024-06-20 15:13:44,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2038, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2149, PETRI_PLACES=154, PETRI_TRANSITIONS=181} [2024-06-20 15:13:44,386 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-20 15:13:44,386 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 181 transitions, 2149 flow [2024-06-20 15:13:44,386 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) [2024-06-20 15:13:44,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:44,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:44,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:13:44,387 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)] === [2024-06-20 15:13:44,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:44,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1106330957, now seen corresponding path program 1 times [2024-06-20 15:13:44,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:44,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143710564] [2024-06-20 15:13:44,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:44,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:44,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:44,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:44,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143710564] [2024-06-20 15:13:44,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143710564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:44,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:44,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:44,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315394605] [2024-06-20 15:13:44,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:44,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:44,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:44,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:44,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:44,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:44,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 181 transitions, 2149 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) [2024-06-20 15:13:44,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:44,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:44,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:44,793 INFO L124 PetriNetUnfolderBase]: 1472/2516 cut-off events. [2024-06-20 15:13:44,794 INFO L125 PetriNetUnfolderBase]: For 60788/60788 co-relation queries the response was YES. [2024-06-20 15:13:44,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13964 conditions, 2516 events. 1472/2516 cut-off events. For 60788/60788 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 14726 event pairs, 347 based on Foata normal form. 4/2503 useless extension candidates. Maximal degree in co-relation 13886. Up to 2238 conditions per place. [2024-06-20 15:13:44,815 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 157 selfloop transitions, 14 changer transitions 0/192 dead transitions. [2024-06-20 15:13:44,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 192 transitions, 2535 flow [2024-06-20 15:13:44,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:13:44,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:13:44,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-20 15:13:44,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-20 15:13:44,816 INFO L175 Difference]: Start difference. First operand has 154 places, 181 transitions, 2149 flow. Second operand 4 states and 98 transitions. [2024-06-20 15:13:44,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 192 transitions, 2535 flow [2024-06-20 15:13:44,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 192 transitions, 2436 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:44,916 INFO L231 Difference]: Finished difference. Result has 153 places, 183 transitions, 2110 flow [2024-06-20 15:13:44,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2110, PETRI_PLACES=153, PETRI_TRANSITIONS=183} [2024-06-20 15:13:44,917 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-20 15:13:44,917 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 183 transitions, 2110 flow [2024-06-20 15:13:44,917 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) [2024-06-20 15:13:44,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:44,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:44,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:13:44,918 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)] === [2024-06-20 15:13:44,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:44,918 INFO L85 PathProgramCache]: Analyzing trace with hash -970338903, now seen corresponding path program 1 times [2024-06-20 15:13:44,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:44,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987595270] [2024-06-20 15:13:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:44,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:45,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:45,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987595270] [2024-06-20 15:13:45,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987595270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:45,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:45,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:45,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304664912] [2024-06-20 15:13:45,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:45,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:45,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:45,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:45,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:45,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:45,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 183 transitions, 2110 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) [2024-06-20 15:13:45,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:45,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:45,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:45,368 INFO L124 PetriNetUnfolderBase]: 1525/2586 cut-off events. [2024-06-20 15:13:45,368 INFO L125 PetriNetUnfolderBase]: For 58728/58728 co-relation queries the response was YES. [2024-06-20 15:13:45,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14242 conditions, 2586 events. 1525/2586 cut-off events. For 58728/58728 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15027 event pairs, 349 based on Foata normal form. 1/2585 useless extension candidates. Maximal degree in co-relation 14164. Up to 2308 conditions per place. [2024-06-20 15:13:45,391 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 170 selfloop transitions, 41 changer transitions 0/218 dead transitions. [2024-06-20 15:13:45,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 218 transitions, 2742 flow [2024-06-20 15:13:45,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:45,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:45,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 15:13:45,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-20 15:13:45,392 INFO L175 Difference]: Start difference. First operand has 153 places, 183 transitions, 2110 flow. Second operand 7 states and 166 transitions. [2024-06-20 15:13:45,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 218 transitions, 2742 flow [2024-06-20 15:13:45,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 218 transitions, 2700 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:45,498 INFO L231 Difference]: Finished difference. Result has 159 places, 194 transitions, 2271 flow [2024-06-20 15:13:45,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2068, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2271, PETRI_PLACES=159, PETRI_TRANSITIONS=194} [2024-06-20 15:13:45,500 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-20 15:13:45,500 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 194 transitions, 2271 flow [2024-06-20 15:13:45,501 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) [2024-06-20 15:13:45,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:45,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:45,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:13:45,501 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)] === [2024-06-20 15:13:45,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:45,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1909755299, now seen corresponding path program 2 times [2024-06-20 15:13:45,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:45,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794290743] [2024-06-20 15:13:45,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:45,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:45,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:45,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794290743] [2024-06-20 15:13:45,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794290743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:45,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:45,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:45,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574260456] [2024-06-20 15:13:45,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:45,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:45,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:45,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:45,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:45,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:45,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 194 transitions, 2271 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) [2024-06-20 15:13:45,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:45,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:45,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:45,964 INFO L124 PetriNetUnfolderBase]: 1538/2608 cut-off events. [2024-06-20 15:13:45,965 INFO L125 PetriNetUnfolderBase]: For 63327/63327 co-relation queries the response was YES. [2024-06-20 15:13:45,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14775 conditions, 2608 events. 1538/2608 cut-off events. For 63327/63327 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15150 event pairs, 349 based on Foata normal form. 1/2607 useless extension candidates. Maximal degree in co-relation 14695. Up to 2323 conditions per place. [2024-06-20 15:13:45,991 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 168 selfloop transitions, 45 changer transitions 0/220 dead transitions. [2024-06-20 15:13:45,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 220 transitions, 2954 flow [2024-06-20 15:13:45,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:45,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:45,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-20 15:13:45,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-20 15:13:45,992 INFO L175 Difference]: Start difference. First operand has 159 places, 194 transitions, 2271 flow. Second operand 7 states and 163 transitions. [2024-06-20 15:13:45,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 220 transitions, 2954 flow [2024-06-20 15:13:46,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 220 transitions, 2910 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:46,096 INFO L231 Difference]: Finished difference. Result has 164 places, 201 transitions, 2398 flow [2024-06-20 15:13:46,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2398, PETRI_PLACES=164, PETRI_TRANSITIONS=201} [2024-06-20 15:13:46,096 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-20 15:13:46,096 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 201 transitions, 2398 flow [2024-06-20 15:13:46,096 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) [2024-06-20 15:13:46,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:46,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:46,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:13:46,097 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)] === [2024-06-20 15:13:46,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:46,097 INFO L85 PathProgramCache]: Analyzing trace with hash -961073313, now seen corresponding path program 3 times [2024-06-20 15:13:46,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:46,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716867327] [2024-06-20 15:13:46,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:46,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:46,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:46,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716867327] [2024-06-20 15:13:46,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716867327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:46,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:46,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:46,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944612601] [2024-06-20 15:13:46,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:46,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:46,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:46,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:46,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:46,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:46,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 201 transitions, 2398 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) [2024-06-20 15:13:46,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:46,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:46,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:46,530 INFO L124 PetriNetUnfolderBase]: 1535/2604 cut-off events. [2024-06-20 15:13:46,531 INFO L125 PetriNetUnfolderBase]: For 66011/66011 co-relation queries the response was YES. [2024-06-20 15:13:46,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14858 conditions, 2604 events. 1535/2604 cut-off events. For 66011/66011 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15143 event pairs, 349 based on Foata normal form. 1/2603 useless extension candidates. Maximal degree in co-relation 14776. Up to 2320 conditions per place. [2024-06-20 15:13:46,554 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 166 selfloop transitions, 46 changer transitions 0/219 dead transitions. [2024-06-20 15:13:46,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 219 transitions, 2936 flow [2024-06-20 15:13:46,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:46,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:46,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-20 15:13:46,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:13:46,556 INFO L175 Difference]: Start difference. First operand has 164 places, 201 transitions, 2398 flow. Second operand 7 states and 161 transitions. [2024-06-20 15:13:46,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 219 transitions, 2936 flow [2024-06-20 15:13:46,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 219 transitions, 2857 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:46,663 INFO L231 Difference]: Finished difference. Result has 169 places, 201 transitions, 2417 flow [2024-06-20 15:13:46,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2319, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2417, PETRI_PLACES=169, PETRI_TRANSITIONS=201} [2024-06-20 15:13:46,663 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-20 15:13:46,663 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 201 transitions, 2417 flow [2024-06-20 15:13:46,664 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) [2024-06-20 15:13:46,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:46,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:46,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:13:46,664 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)] === [2024-06-20 15:13:46,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:46,664 INFO L85 PathProgramCache]: Analyzing trace with hash 200218865, now seen corresponding path program 4 times [2024-06-20 15:13:46,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:46,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034757507] [2024-06-20 15:13:46,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:46,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:46,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:46,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034757507] [2024-06-20 15:13:46,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034757507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:46,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:46,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:46,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971647905] [2024-06-20 15:13:46,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:46,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:46,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:46,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:46,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:46,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:46,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 201 transitions, 2417 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) [2024-06-20 15:13:46,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:46,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:46,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:47,141 INFO L124 PetriNetUnfolderBase]: 1540/2613 cut-off events. [2024-06-20 15:13:47,141 INFO L125 PetriNetUnfolderBase]: For 69524/69524 co-relation queries the response was YES. [2024-06-20 15:13:47,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14992 conditions, 2613 events. 1540/2613 cut-off events. For 69524/69524 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15208 event pairs, 349 based on Foata normal form. 1/2612 useless extension candidates. Maximal degree in co-relation 14909. Up to 2347 conditions per place. [2024-06-20 15:13:47,164 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 186 selfloop transitions, 34 changer transitions 0/227 dead transitions. [2024-06-20 15:13:47,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 227 transitions, 3026 flow [2024-06-20 15:13:47,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:47,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:47,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 15:13:47,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-20 15:13:47,166 INFO L175 Difference]: Start difference. First operand has 169 places, 201 transitions, 2417 flow. Second operand 6 states and 148 transitions. [2024-06-20 15:13:47,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 227 transitions, 3026 flow [2024-06-20 15:13:47,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 227 transitions, 2930 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:47,321 INFO L231 Difference]: Finished difference. Result has 170 places, 204 transitions, 2434 flow [2024-06-20 15:13:47,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2327, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2434, PETRI_PLACES=170, PETRI_TRANSITIONS=204} [2024-06-20 15:13:47,322 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 129 predicate places. [2024-06-20 15:13:47,322 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 204 transitions, 2434 flow [2024-06-20 15:13:47,322 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) [2024-06-20 15:13:47,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:47,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:47,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:13:47,323 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)] === [2024-06-20 15:13:47,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:47,323 INFO L85 PathProgramCache]: Analyzing trace with hash -76826275, now seen corresponding path program 5 times [2024-06-20 15:13:47,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:47,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977525563] [2024-06-20 15:13:47,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:47,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:47,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:47,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977525563] [2024-06-20 15:13:47,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977525563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:47,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:47,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:47,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635082411] [2024-06-20 15:13:47,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:47,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:47,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:47,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:47,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:47,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:47,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 204 transitions, 2434 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) [2024-06-20 15:13:47,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:47,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:47,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:47,783 INFO L124 PetriNetUnfolderBase]: 1537/2609 cut-off events. [2024-06-20 15:13:47,784 INFO L125 PetriNetUnfolderBase]: For 72040/72040 co-relation queries the response was YES. [2024-06-20 15:13:47,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15004 conditions, 2609 events. 1537/2609 cut-off events. For 72040/72040 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15209 event pairs, 349 based on Foata normal form. 1/2608 useless extension candidates. Maximal degree in co-relation 14920. Up to 2344 conditions per place. [2024-06-20 15:13:47,809 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 181 selfloop transitions, 32 changer transitions 0/220 dead transitions. [2024-06-20 15:13:47,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 220 transitions, 2900 flow [2024-06-20 15:13:47,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:47,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:47,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-20 15:13:47,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:13:47,810 INFO L175 Difference]: Start difference. First operand has 170 places, 204 transitions, 2434 flow. Second operand 6 states and 141 transitions. [2024-06-20 15:13:47,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 220 transitions, 2900 flow [2024-06-20 15:13:47,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 220 transitions, 2792 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:47,924 INFO L231 Difference]: Finished difference. Result has 172 places, 204 transitions, 2396 flow [2024-06-20 15:13:47,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2326, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2396, PETRI_PLACES=172, PETRI_TRANSITIONS=204} [2024-06-20 15:13:47,924 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-20 15:13:47,925 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 204 transitions, 2396 flow [2024-06-20 15:13:47,925 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) [2024-06-20 15:13:47,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:47,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:47,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:13:47,925 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)] === [2024-06-20 15:13:47,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:47,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1187095605, now seen corresponding path program 1 times [2024-06-20 15:13:47,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:47,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519684166] [2024-06-20 15:13:47,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:47,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:48,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:48,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519684166] [2024-06-20 15:13:48,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519684166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:48,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:48,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:48,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728321137] [2024-06-20 15:13:48,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:48,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:48,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:48,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:48,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:48,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:48,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 204 transitions, 2396 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) [2024-06-20 15:13:48,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:48,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:48,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:48,363 INFO L124 PetriNetUnfolderBase]: 1539/2620 cut-off events. [2024-06-20 15:13:48,403 INFO L125 PetriNetUnfolderBase]: For 77353/77367 co-relation queries the response was YES. [2024-06-20 15:13:48,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15066 conditions, 2620 events. 1539/2620 cut-off events. For 77353/77367 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15340 event pairs, 390 based on Foata normal form. 12/2625 useless extension candidates. Maximal degree in co-relation 14981. Up to 2196 conditions per place. [2024-06-20 15:13:48,422 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 141 selfloop transitions, 74 changer transitions 0/222 dead transitions. [2024-06-20 15:13:48,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 222 transitions, 3059 flow [2024-06-20 15:13:48,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:48,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:48,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-20 15:13:48,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:13:48,424 INFO L175 Difference]: Start difference. First operand has 172 places, 204 transitions, 2396 flow. Second operand 6 states and 144 transitions. [2024-06-20 15:13:48,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 222 transitions, 3059 flow [2024-06-20 15:13:48,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 222 transitions, 2953 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:48,563 INFO L231 Difference]: Finished difference. Result has 173 places, 207 transitions, 2490 flow [2024-06-20 15:13:48,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2490, PETRI_PLACES=173, PETRI_TRANSITIONS=207} [2024-06-20 15:13:48,564 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-20 15:13:48,564 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 207 transitions, 2490 flow [2024-06-20 15:13:48,564 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) [2024-06-20 15:13:48,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:48,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:48,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:13:48,565 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)] === [2024-06-20 15:13:48,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:48,565 INFO L85 PathProgramCache]: Analyzing trace with hash 148207243, now seen corresponding path program 2 times [2024-06-20 15:13:48,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:48,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976868735] [2024-06-20 15:13:48,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:48,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:48,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:48,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976868735] [2024-06-20 15:13:48,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976868735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:48,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:48,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:48,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201970228] [2024-06-20 15:13:48,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:48,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:48,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:48,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:48,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:48,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:48,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 207 transitions, 2490 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) [2024-06-20 15:13:48,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:48,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:48,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:49,089 INFO L124 PetriNetUnfolderBase]: 1541/2620 cut-off events. [2024-06-20 15:13:49,089 INFO L125 PetriNetUnfolderBase]: For 78579/78582 co-relation queries the response was YES. [2024-06-20 15:13:49,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15242 conditions, 2620 events. 1541/2620 cut-off events. For 78579/78582 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15302 event pairs, 353 based on Foata normal form. 4/2621 useless extension candidates. Maximal degree in co-relation 15157. Up to 2258 conditions per place. [2024-06-20 15:13:49,114 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 165 selfloop transitions, 59 changer transitions 0/231 dead transitions. [2024-06-20 15:13:49,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 231 transitions, 3200 flow [2024-06-20 15:13:49,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:49,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:49,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 15:13:49,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-20 15:13:49,115 INFO L175 Difference]: Start difference. First operand has 173 places, 207 transitions, 2490 flow. Second operand 6 states and 151 transitions. [2024-06-20 15:13:49,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 231 transitions, 3200 flow [2024-06-20 15:13:49,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 231 transitions, 2999 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:49,295 INFO L231 Difference]: Finished difference. Result has 175 places, 210 transitions, 2468 flow [2024-06-20 15:13:49,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2295, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2468, PETRI_PLACES=175, PETRI_TRANSITIONS=210} [2024-06-20 15:13:49,295 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-20 15:13:49,295 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 210 transitions, 2468 flow [2024-06-20 15:13:49,296 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) [2024-06-20 15:13:49,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:49,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:49,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:13:49,296 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)] === [2024-06-20 15:13:49,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:49,296 INFO L85 PathProgramCache]: Analyzing trace with hash -21455658, now seen corresponding path program 1 times [2024-06-20 15:13:49,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:49,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656085213] [2024-06-20 15:13:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:49,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:49,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:49,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656085213] [2024-06-20 15:13:49,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656085213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:49,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:49,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:49,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743192397] [2024-06-20 15:13:49,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:49,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:49,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:49,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:49,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:49,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:49,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 210 transitions, 2468 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) [2024-06-20 15:13:49,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:49,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:49,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:49,803 INFO L124 PetriNetUnfolderBase]: 1562/2636 cut-off events. [2024-06-20 15:13:49,803 INFO L125 PetriNetUnfolderBase]: For 82843/82843 co-relation queries the response was YES. [2024-06-20 15:13:49,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15480 conditions, 2636 events. 1562/2636 cut-off events. For 82843/82843 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 15291 event pairs, 373 based on Foata normal form. 1/2626 useless extension candidates. Maximal degree in co-relation 15395. Up to 2163 conditions per place. [2024-06-20 15:13:49,826 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 170 selfloop transitions, 76 changer transitions 0/253 dead transitions. [2024-06-20 15:13:49,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 253 transitions, 3494 flow [2024-06-20 15:13:49,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:49,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:49,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:13:49,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-20 15:13:49,829 INFO L175 Difference]: Start difference. First operand has 175 places, 210 transitions, 2468 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:13:49,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 253 transitions, 3494 flow [2024-06-20 15:13:49,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 253 transitions, 3346 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:50,002 INFO L231 Difference]: Finished difference. Result has 178 places, 223 transitions, 2626 flow [2024-06-20 15:13:50,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2320, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2626, PETRI_PLACES=178, PETRI_TRANSITIONS=223} [2024-06-20 15:13:50,003 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-20 15:13:50,003 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 223 transitions, 2626 flow [2024-06-20 15:13:50,003 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) [2024-06-20 15:13:50,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:50,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:50,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:13:50,004 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)] === [2024-06-20 15:13:50,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:50,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1214022022, now seen corresponding path program 2 times [2024-06-20 15:13:50,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:50,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590869148] [2024-06-20 15:13:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:50,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:50,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:50,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590869148] [2024-06-20 15:13:50,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590869148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:50,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:50,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:50,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501468408] [2024-06-20 15:13:50,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:50,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:50,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:50,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:50,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:50,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:50,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 223 transitions, 2626 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) [2024-06-20 15:13:50,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:50,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:50,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:50,500 INFO L124 PetriNetUnfolderBase]: 1583/2669 cut-off events. [2024-06-20 15:13:50,501 INFO L125 PetriNetUnfolderBase]: For 89734/89734 co-relation queries the response was YES. [2024-06-20 15:13:50,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16214 conditions, 2669 events. 1583/2669 cut-off events. For 89734/89734 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 15511 event pairs, 373 based on Foata normal form. 1/2659 useless extension candidates. Maximal degree in co-relation 16128. Up to 2182 conditions per place. [2024-06-20 15:13:50,527 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 167 selfloop transitions, 83 changer transitions 0/257 dead transitions. [2024-06-20 15:13:50,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 257 transitions, 3612 flow [2024-06-20 15:13:50,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:50,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:50,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:13:50,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-20 15:13:50,529 INFO L175 Difference]: Start difference. First operand has 178 places, 223 transitions, 2626 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:13:50,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 257 transitions, 3612 flow [2024-06-20 15:13:50,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 257 transitions, 3508 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:50,712 INFO L231 Difference]: Finished difference. Result has 184 places, 230 transitions, 2786 flow [2024-06-20 15:13:50,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2546, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2786, PETRI_PLACES=184, PETRI_TRANSITIONS=230} [2024-06-20 15:13:50,712 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 143 predicate places. [2024-06-20 15:13:50,712 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 230 transitions, 2786 flow [2024-06-20 15:13:50,713 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) [2024-06-20 15:13:50,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:50,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:50,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:13:50,713 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)] === [2024-06-20 15:13:50,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:50,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1222595878, now seen corresponding path program 1 times [2024-06-20 15:13:50,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:50,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261235210] [2024-06-20 15:13:50,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:50,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:50,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:50,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:50,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:50,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261235210] [2024-06-20 15:13:50,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261235210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:50,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:50,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:50,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380548326] [2024-06-20 15:13:50,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:50,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:50,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:50,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:50,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:50,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:50,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 230 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) [2024-06-20 15:13:50,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:50,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:50,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:51,331 INFO L124 PetriNetUnfolderBase]: 1591/2693 cut-off events. [2024-06-20 15:13:51,336 INFO L125 PetriNetUnfolderBase]: For 94633/94633 co-relation queries the response was YES. [2024-06-20 15:13:51,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16558 conditions, 2693 events. 1591/2693 cut-off events. For 94633/94633 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 15741 event pairs, 264 based on Foata normal form. 2/2693 useless extension candidates. Maximal degree in co-relation 16469. Up to 2378 conditions per place. [2024-06-20 15:13:51,364 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 225 selfloop transitions, 31 changer transitions 0/263 dead transitions. [2024-06-20 15:13:51,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 263 transitions, 3486 flow [2024-06-20 15:13:51,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:51,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:51,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-20 15:13:51,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-20 15:13:51,366 INFO L175 Difference]: Start difference. First operand has 184 places, 230 transitions, 2786 flow. Second operand 7 states and 167 transitions. [2024-06-20 15:13:51,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 263 transitions, 3486 flow [2024-06-20 15:13:51,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 263 transitions, 3345 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:51,584 INFO L231 Difference]: Finished difference. Result has 188 places, 234 transitions, 2748 flow [2024-06-20 15:13:51,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2645, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2748, PETRI_PLACES=188, PETRI_TRANSITIONS=234} [2024-06-20 15:13:51,585 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-20 15:13:51,585 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 234 transitions, 2748 flow [2024-06-20 15:13:51,585 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) [2024-06-20 15:13:51,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:51,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:51,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:13:51,585 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)] === [2024-06-20 15:13:51,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:51,586 INFO L85 PathProgramCache]: Analyzing trace with hash 798047568, now seen corresponding path program 2 times [2024-06-20 15:13:51,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:51,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910972974] [2024-06-20 15:13:51,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:51,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:51,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:51,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910972974] [2024-06-20 15:13:51,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910972974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:51,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:51,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:51,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594073511] [2024-06-20 15:13:51,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:51,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:51,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:51,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:51,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:51,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:51,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 234 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) [2024-06-20 15:13:51,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:51,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:51,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:52,111 INFO L124 PetriNetUnfolderBase]: 1599/2703 cut-off events. [2024-06-20 15:13:52,111 INFO L125 PetriNetUnfolderBase]: For 98507/98507 co-relation queries the response was YES. [2024-06-20 15:13:52,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16608 conditions, 2703 events. 1599/2703 cut-off events. For 98507/98507 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 15771 event pairs, 342 based on Foata normal form. 2/2703 useless extension candidates. Maximal degree in co-relation 16518. Up to 2435 conditions per place. [2024-06-20 15:13:52,140 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 225 selfloop transitions, 28 changer transitions 0/260 dead transitions. [2024-06-20 15:13:52,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 260 transitions, 3334 flow [2024-06-20 15:13:52,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:52,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:52,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-20 15:13:52,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-20 15:13:52,141 INFO L175 Difference]: Start difference. First operand has 188 places, 234 transitions, 2748 flow. Second operand 7 states and 162 transitions. [2024-06-20 15:13:52,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 260 transitions, 3334 flow [2024-06-20 15:13:52,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 260 transitions, 3272 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:52,445 INFO L231 Difference]: Finished difference. Result has 192 places, 236 transitions, 2771 flow [2024-06-20 15:13:52,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2696, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2771, PETRI_PLACES=192, PETRI_TRANSITIONS=236} [2024-06-20 15:13:52,445 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-20 15:13:52,445 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 236 transitions, 2771 flow [2024-06-20 15:13:52,446 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) [2024-06-20 15:13:52,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:52,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:52,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:13:52,446 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)] === [2024-06-20 15:13:52,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:52,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1104444772, now seen corresponding path program 3 times [2024-06-20 15:13:52,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:52,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939266524] [2024-06-20 15:13:52,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:52,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:52,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:52,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939266524] [2024-06-20 15:13:52,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939266524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:52,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:52,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:52,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200807081] [2024-06-20 15:13:52,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:52,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:52,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:52,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:52,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:52,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:52,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 236 transitions, 2771 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) [2024-06-20 15:13:52,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:52,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:52,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:52,980 INFO L124 PetriNetUnfolderBase]: 1622/2734 cut-off events. [2024-06-20 15:13:52,981 INFO L125 PetriNetUnfolderBase]: For 103266/103266 co-relation queries the response was YES. [2024-06-20 15:13:52,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16974 conditions, 2734 events. 1622/2734 cut-off events. For 103266/103266 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 15966 event pairs, 359 based on Foata normal form. 1/2728 useless extension candidates. Maximal degree in co-relation 16882. Up to 2371 conditions per place. [2024-06-20 15:13:53,008 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 207 selfloop transitions, 60 changer transitions 0/274 dead transitions. [2024-06-20 15:13:53,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 274 transitions, 3795 flow [2024-06-20 15:13:53,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:53,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:53,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:13:53,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-20 15:13:53,009 INFO L175 Difference]: Start difference. First operand has 192 places, 236 transitions, 2771 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:13:53,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 274 transitions, 3795 flow [2024-06-20 15:13:53,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 274 transitions, 3740 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:53,230 INFO L231 Difference]: Finished difference. Result has 195 places, 248 transitions, 3025 flow [2024-06-20 15:13:53,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2716, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3025, PETRI_PLACES=195, PETRI_TRANSITIONS=248} [2024-06-20 15:13:53,231 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 154 predicate places. [2024-06-20 15:13:53,231 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 248 transitions, 3025 flow [2024-06-20 15:13:53,231 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) [2024-06-20 15:13:53,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:53,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:53,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:13:53,231 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)] === [2024-06-20 15:13:53,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:53,232 INFO L85 PathProgramCache]: Analyzing trace with hash -933443812, now seen corresponding path program 4 times [2024-06-20 15:13:53,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:53,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011660110] [2024-06-20 15:13:53,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:53,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:53,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:53,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011660110] [2024-06-20 15:13:53,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011660110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:53,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:53,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:53,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73837905] [2024-06-20 15:13:53,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:53,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:53,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:53,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:53,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:53,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:53,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 248 transitions, 3025 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) [2024-06-20 15:13:53,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:53,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:53,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:53,804 INFO L124 PetriNetUnfolderBase]: 1632/2751 cut-off events. [2024-06-20 15:13:53,805 INFO L125 PetriNetUnfolderBase]: For 108085/108085 co-relation queries the response was YES. [2024-06-20 15:13:53,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17355 conditions, 2751 events. 1632/2751 cut-off events. For 108085/108085 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 16118 event pairs, 359 based on Foata normal form. 1/2745 useless extension candidates. Maximal degree in co-relation 17261. Up to 2379 conditions per place. [2024-06-20 15:13:53,832 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 208 selfloop transitions, 67 changer transitions 0/282 dead transitions. [2024-06-20 15:13:53,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 282 transitions, 4002 flow [2024-06-20 15:13:53,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:13:53,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:13:53,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-20 15:13:53,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:13:53,833 INFO L175 Difference]: Start difference. First operand has 195 places, 248 transitions, 3025 flow. Second operand 9 states and 207 transitions. [2024-06-20 15:13:53,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 282 transitions, 4002 flow [2024-06-20 15:13:54,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 282 transitions, 3890 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:54,050 INFO L231 Difference]: Finished difference. Result has 202 places, 254 transitions, 3142 flow [2024-06-20 15:13:54,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2928, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3142, PETRI_PLACES=202, PETRI_TRANSITIONS=254} [2024-06-20 15:13:54,051 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2024-06-20 15:13:54,051 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 254 transitions, 3142 flow [2024-06-20 15:13:54,051 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) [2024-06-20 15:13:54,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:54,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:54,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:13:54,051 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)] === [2024-06-20 15:13:54,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:54,052 INFO L85 PathProgramCache]: Analyzing trace with hash 2081553146, now seen corresponding path program 1 times [2024-06-20 15:13:54,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:54,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951775421] [2024-06-20 15:13:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:54,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:54,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:54,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:54,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:54,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951775421] [2024-06-20 15:13:54,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951775421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:54,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:54,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:54,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094584267] [2024-06-20 15:13:54,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:54,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:54,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:54,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:54,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:54,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:54,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 254 transitions, 3142 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) [2024-06-20 15:13:54,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:54,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:54,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:54,603 INFO L124 PetriNetUnfolderBase]: 1637/2760 cut-off events. [2024-06-20 15:13:54,603 INFO L125 PetriNetUnfolderBase]: For 112503/112503 co-relation queries the response was YES. [2024-06-20 15:13:54,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17522 conditions, 2760 events. 1637/2760 cut-off events. For 112503/112503 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 16181 event pairs, 359 based on Foata normal form. 1/2754 useless extension candidates. Maximal degree in co-relation 17427. Up to 2406 conditions per place. [2024-06-20 15:13:54,634 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 214 selfloop transitions, 58 changer transitions 0/279 dead transitions. [2024-06-20 15:13:54,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 279 transitions, 3972 flow [2024-06-20 15:13:54,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:54,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 15:13:54,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-20 15:13:54,635 INFO L175 Difference]: Start difference. First operand has 202 places, 254 transitions, 3142 flow. Second operand 7 states and 166 transitions. [2024-06-20 15:13:54,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 279 transitions, 3972 flow [2024-06-20 15:13:54,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 279 transitions, 3818 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:54,939 INFO L231 Difference]: Finished difference. Result has 203 places, 257 transitions, 3158 flow [2024-06-20 15:13:54,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2994, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3158, PETRI_PLACES=203, PETRI_TRANSITIONS=257} [2024-06-20 15:13:54,939 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-20 15:13:54,939 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 257 transitions, 3158 flow [2024-06-20 15:13:54,940 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) [2024-06-20 15:13:54,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:54,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:54,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:13:54,940 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)] === [2024-06-20 15:13:54,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:54,940 INFO L85 PathProgramCache]: Analyzing trace with hash 271145592, now seen corresponding path program 5 times [2024-06-20 15:13:54,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:54,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391020957] [2024-06-20 15:13:54,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:54,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:55,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:55,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391020957] [2024-06-20 15:13:55,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391020957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:55,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:55,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:55,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638234398] [2024-06-20 15:13:55,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:55,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:55,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:55,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:55,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:55,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:55,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 257 transitions, 3158 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) [2024-06-20 15:13:55,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:55,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:55,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:55,510 INFO L124 PetriNetUnfolderBase]: 1666/2798 cut-off events. [2024-06-20 15:13:55,510 INFO L125 PetriNetUnfolderBase]: For 120328/120328 co-relation queries the response was YES. [2024-06-20 15:13:55,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17945 conditions, 2798 events. 1666/2798 cut-off events. For 120328/120328 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16398 event pairs, 371 based on Foata normal form. 1/2788 useless extension candidates. Maximal degree in co-relation 17849. Up to 2255 conditions per place. [2024-06-20 15:13:55,540 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 172 selfloop transitions, 109 changer transitions 0/288 dead transitions. [2024-06-20 15:13:55,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 288 transitions, 4264 flow [2024-06-20 15:13:55,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:55,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:55,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:13:55,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-20 15:13:55,541 INFO L175 Difference]: Start difference. First operand has 203 places, 257 transitions, 3158 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:13:55,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 288 transitions, 4264 flow [2024-06-20 15:13:55,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 288 transitions, 4146 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:55,918 INFO L231 Difference]: Finished difference. Result has 206 places, 267 transitions, 3382 flow [2024-06-20 15:13:55,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3040, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3382, PETRI_PLACES=206, PETRI_TRANSITIONS=267} [2024-06-20 15:13:55,919 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-20 15:13:55,919 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 267 transitions, 3382 flow [2024-06-20 15:13:55,919 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) [2024-06-20 15:13:55,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:55,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:55,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:13:55,920 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)] === [2024-06-20 15:13:55,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:55,920 INFO L85 PathProgramCache]: Analyzing trace with hash -837856450, now seen corresponding path program 2 times [2024-06-20 15:13:55,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:55,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654886018] [2024-06-20 15:13:55,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:55,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:56,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:56,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654886018] [2024-06-20 15:13:56,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654886018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:56,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:56,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:56,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671606854] [2024-06-20 15:13:56,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:56,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:56,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:56,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:56,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:56,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:56,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 267 transitions, 3382 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) [2024-06-20 15:13:56,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:56,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:56,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:56,453 INFO L124 PetriNetUnfolderBase]: 1671/2814 cut-off events. [2024-06-20 15:13:56,458 INFO L125 PetriNetUnfolderBase]: For 125540/125540 co-relation queries the response was YES. [2024-06-20 15:13:56,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18279 conditions, 2814 events. 1671/2814 cut-off events. For 125540/125540 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 16560 event pairs, 358 based on Foata normal form. 1/2808 useless extension candidates. Maximal degree in co-relation 18182. Up to 2452 conditions per place. [2024-06-20 15:13:56,485 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 222 selfloop transitions, 61 changer transitions 0/290 dead transitions. [2024-06-20 15:13:56,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 290 transitions, 4234 flow [2024-06-20 15:13:56,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:56,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-20 15:13:56,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-20 15:13:56,487 INFO L175 Difference]: Start difference. First operand has 206 places, 267 transitions, 3382 flow. Second operand 8 states and 182 transitions. [2024-06-20 15:13:56,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 290 transitions, 4234 flow [2024-06-20 15:13:56,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 290 transitions, 4048 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:56,802 INFO L231 Difference]: Finished difference. Result has 211 places, 270 transitions, 3370 flow [2024-06-20 15:13:56,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3200, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3370, PETRI_PLACES=211, PETRI_TRANSITIONS=270} [2024-06-20 15:13:56,803 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-20 15:13:56,803 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 270 transitions, 3370 flow [2024-06-20 15:13:56,804 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) [2024-06-20 15:13:56,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:56,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:56,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:13:56,804 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)] === [2024-06-20 15:13:56,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:56,805 INFO L85 PathProgramCache]: Analyzing trace with hash 271265562, now seen corresponding path program 6 times [2024-06-20 15:13:56,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:56,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045672825] [2024-06-20 15:13:56,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:56,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:56,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:56,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045672825] [2024-06-20 15:13:56,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045672825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:56,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:56,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:56,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440063941] [2024-06-20 15:13:56,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:56,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:56,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:56,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:56,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:56,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:56,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 270 transitions, 3370 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) [2024-06-20 15:13:56,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:56,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:56,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:57,315 INFO L124 PetriNetUnfolderBase]: 1668/2809 cut-off events. [2024-06-20 15:13:57,315 INFO L125 PetriNetUnfolderBase]: For 129030/129030 co-relation queries the response was YES. [2024-06-20 15:13:57,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18141 conditions, 2809 events. 1668/2809 cut-off events. For 129030/129030 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 16525 event pairs, 361 based on Foata normal form. 1/2803 useless extension candidates. Maximal degree in co-relation 18043. Up to 2445 conditions per place. [2024-06-20 15:13:57,342 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 218 selfloop transitions, 64 changer transitions 0/289 dead transitions. [2024-06-20 15:13:57,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 289 transitions, 4176 flow [2024-06-20 15:13:57,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:57,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:57,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-20 15:13:57,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-20 15:13:57,343 INFO L175 Difference]: Start difference. First operand has 211 places, 270 transitions, 3370 flow. Second operand 7 states and 164 transitions. [2024-06-20 15:13:57,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 289 transitions, 4176 flow [2024-06-20 15:13:57,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 289 transitions, 4044 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:57,702 INFO L231 Difference]: Finished difference. Result has 214 places, 270 transitions, 3372 flow [2024-06-20 15:13:57,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3238, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3372, PETRI_PLACES=214, PETRI_TRANSITIONS=270} [2024-06-20 15:13:57,702 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-20 15:13:57,702 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 270 transitions, 3372 flow [2024-06-20 15:13:57,703 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) [2024-06-20 15:13:57,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:57,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:57,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:13:57,703 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)] === [2024-06-20 15:13:57,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:57,703 INFO L85 PathProgramCache]: Analyzing trace with hash 271142616, now seen corresponding path program 3 times [2024-06-20 15:13:57,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:57,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686291002] [2024-06-20 15:13:57,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:57,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:57,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:57,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686291002] [2024-06-20 15:13:57,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686291002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:57,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:57,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:57,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91272241] [2024-06-20 15:13:57,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:57,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:57,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:57,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:57,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:57,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:57,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 270 transitions, 3372 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) [2024-06-20 15:13:57,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:57,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:57,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:58,245 INFO L124 PetriNetUnfolderBase]: 1676/2827 cut-off events. [2024-06-20 15:13:58,245 INFO L125 PetriNetUnfolderBase]: For 134571/134571 co-relation queries the response was YES. [2024-06-20 15:13:58,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18241 conditions, 2827 events. 1676/2827 cut-off events. For 134571/134571 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 16630 event pairs, 343 based on Foata normal form. 2/2827 useless extension candidates. Maximal degree in co-relation 18142. Up to 2543 conditions per place. [2024-06-20 15:13:58,277 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 256 selfloop transitions, 27 changer transitions 0/290 dead transitions. [2024-06-20 15:13:58,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 290 transitions, 3996 flow [2024-06-20 15:13:58,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:58,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:58,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-20 15:13:58,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-20 15:13:58,278 INFO L175 Difference]: Start difference. First operand has 214 places, 270 transitions, 3372 flow. Second operand 7 states and 157 transitions. [2024-06-20 15:13:58,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 290 transitions, 3996 flow [2024-06-20 15:13:58,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 290 transitions, 3862 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:58,694 INFO L231 Difference]: Finished difference. Result has 216 places, 272 transitions, 3315 flow [2024-06-20 15:13:58,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3238, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3315, PETRI_PLACES=216, PETRI_TRANSITIONS=272} [2024-06-20 15:13:58,694 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-20 15:13:58,694 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 272 transitions, 3315 flow [2024-06-20 15:13:58,695 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) [2024-06-20 15:13:58,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:58,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:58,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:13:58,695 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)] === [2024-06-20 15:13:58,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:58,695 INFO L85 PathProgramCache]: Analyzing trace with hash 271512012, now seen corresponding path program 1 times [2024-06-20 15:13:58,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:58,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874451768] [2024-06-20 15:13:58,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:58,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:58,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:58,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:58,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874451768] [2024-06-20 15:13:58,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874451768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:58,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:58,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:58,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408782116] [2024-06-20 15:13:58,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:58,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:58,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:58,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:58,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:58,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:58,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 272 transitions, 3315 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:58,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:58,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:58,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:59,227 INFO L124 PetriNetUnfolderBase]: 1671/2824 cut-off events. [2024-06-20 15:13:59,227 INFO L125 PetriNetUnfolderBase]: For 153689/153689 co-relation queries the response was YES. [2024-06-20 15:13:59,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18238 conditions, 2824 events. 1671/2824 cut-off events. For 153689/153689 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 16744 event pairs, 367 based on Foata normal form. 12/2815 useless extension candidates. Maximal degree in co-relation 18138. Up to 2284 conditions per place. [2024-06-20 15:13:59,257 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 168 selfloop transitions, 97 changer transitions 0/297 dead transitions. [2024-06-20 15:13:59,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 297 transitions, 4153 flow [2024-06-20 15:13:59,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:59,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:59,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:13:59,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-20 15:13:59,258 INFO L175 Difference]: Start difference. First operand has 216 places, 272 transitions, 3315 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:13:59,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 297 transitions, 4153 flow [2024-06-20 15:13:59,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 297 transitions, 4102 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:59,707 INFO L231 Difference]: Finished difference. Result has 219 places, 274 transitions, 3501 flow [2024-06-20 15:13:59,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3264, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3501, PETRI_PLACES=219, PETRI_TRANSITIONS=274} [2024-06-20 15:13:59,709 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 178 predicate places. [2024-06-20 15:13:59,709 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 274 transitions, 3501 flow [2024-06-20 15:13:59,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:59,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:59,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:59,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:13:59,709 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)] === [2024-06-20 15:13:59,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:59,710 INFO L85 PathProgramCache]: Analyzing trace with hash -751735066, now seen corresponding path program 3 times [2024-06-20 15:13:59,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:59,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560195835] [2024-06-20 15:13:59,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:59,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:59,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:59,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560195835] [2024-06-20 15:13:59,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560195835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:59,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:59,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:59,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824320621] [2024-06-20 15:13:59,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:59,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:59,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:59,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:59,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:59,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:59,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 274 transitions, 3501 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) [2024-06-20 15:13:59,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:59,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:59,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:00,228 INFO L124 PetriNetUnfolderBase]: 1717/2897 cut-off events. [2024-06-20 15:14:00,229 INFO L125 PetriNetUnfolderBase]: For 146287/146301 co-relation queries the response was YES. [2024-06-20 15:14:00,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18952 conditions, 2897 events. 1717/2897 cut-off events. For 146287/146301 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 17184 event pairs, 378 based on Foata normal form. 11/2901 useless extension candidates. Maximal degree in co-relation 18850. Up to 2525 conditions per place. [2024-06-20 15:14:00,258 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 225 selfloop transitions, 56 changer transitions 0/288 dead transitions. [2024-06-20 15:14:00,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 288 transitions, 4201 flow [2024-06-20 15:14:00,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:00,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:00,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-20 15:14:00,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-20 15:14:00,259 INFO L175 Difference]: Start difference. First operand has 219 places, 274 transitions, 3501 flow. Second operand 6 states and 140 transitions. [2024-06-20 15:14:00,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 288 transitions, 4201 flow [2024-06-20 15:14:00,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 288 transitions, 3998 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:00,587 INFO L231 Difference]: Finished difference. Result has 220 places, 274 transitions, 3416 flow [2024-06-20 15:14:00,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3298, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3416, PETRI_PLACES=220, PETRI_TRANSITIONS=274} [2024-06-20 15:14:00,588 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-20 15:14:00,588 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 274 transitions, 3416 flow [2024-06-20 15:14:00,588 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) [2024-06-20 15:14:00,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:00,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:00,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:14:00,589 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)] === [2024-06-20 15:14:00,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:00,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2016968804, now seen corresponding path program 7 times [2024-06-20 15:14:00,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:00,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451498503] [2024-06-20 15:14:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:00,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:00,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:00,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451498503] [2024-06-20 15:14:00,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451498503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:00,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:00,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:00,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046473624] [2024-06-20 15:14:00,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:00,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:00,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:00,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:00,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:00,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:00,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 274 transitions, 3416 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) [2024-06-20 15:14:00,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:00,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:00,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:01,134 INFO L124 PetriNetUnfolderBase]: 1719/2886 cut-off events. [2024-06-20 15:14:01,134 INFO L125 PetriNetUnfolderBase]: For 148215/148215 co-relation queries the response was YES. [2024-06-20 15:14:01,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18791 conditions, 2886 events. 1719/2886 cut-off events. For 148215/148215 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 16994 event pairs, 365 based on Foata normal form. 2/2881 useless extension candidates. Maximal degree in co-relation 18688. Up to 2383 conditions per place. [2024-06-20 15:14:01,163 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 192 selfloop transitions, 107 changer transitions 0/306 dead transitions. [2024-06-20 15:14:01,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 306 transitions, 4438 flow [2024-06-20 15:14:01,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:01,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:01,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:14:01,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-20 15:14:01,164 INFO L175 Difference]: Start difference. First operand has 220 places, 274 transitions, 3416 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:14:01,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 306 transitions, 4438 flow [2024-06-20 15:14:01,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 306 transitions, 4304 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:01,608 INFO L231 Difference]: Finished difference. Result has 224 places, 277 transitions, 3573 flow [2024-06-20 15:14:01,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3282, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3573, PETRI_PLACES=224, PETRI_TRANSITIONS=277} [2024-06-20 15:14:01,609 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-20 15:14:01,609 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 277 transitions, 3573 flow [2024-06-20 15:14:01,609 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) [2024-06-20 15:14:01,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:01,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:01,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:14:01,610 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)] === [2024-06-20 15:14:01,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:01,610 INFO L85 PathProgramCache]: Analyzing trace with hash -2083741160, now seen corresponding path program 4 times [2024-06-20 15:14:01,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:01,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282470838] [2024-06-20 15:14:01,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:01,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:01,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:01,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282470838] [2024-06-20 15:14:01,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282470838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:01,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:01,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:01,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626138438] [2024-06-20 15:14:01,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:01,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:01,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:01,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:01,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:01,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:01,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 277 transitions, 3573 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) [2024-06-20 15:14:01,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:01,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:01,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:02,161 INFO L124 PetriNetUnfolderBase]: 1716/2887 cut-off events. [2024-06-20 15:14:02,161 INFO L125 PetriNetUnfolderBase]: For 151229/151229 co-relation queries the response was YES. [2024-06-20 15:14:02,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19028 conditions, 2887 events. 1716/2887 cut-off events. For 151229/151229 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17037 event pairs, 362 based on Foata normal form. 1/2881 useless extension candidates. Maximal degree in co-relation 18923. Up to 2525 conditions per place. [2024-06-20 15:14:02,190 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 226 selfloop transitions, 60 changer transitions 0/293 dead transitions. [2024-06-20 15:14:02,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 293 transitions, 4185 flow [2024-06-20 15:14:02,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:02,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:02,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-20 15:14:02,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:14:02,192 INFO L175 Difference]: Start difference. First operand has 224 places, 277 transitions, 3573 flow. Second operand 6 states and 144 transitions. [2024-06-20 15:14:02,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 293 transitions, 4185 flow [2024-06-20 15:14:02,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 293 transitions, 3958 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:02,637 INFO L231 Difference]: Finished difference. Result has 224 places, 277 transitions, 3480 flow [2024-06-20 15:14:02,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3346, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3480, PETRI_PLACES=224, PETRI_TRANSITIONS=277} [2024-06-20 15:14:02,638 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-20 15:14:02,638 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 277 transitions, 3480 flow [2024-06-20 15:14:02,638 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) [2024-06-20 15:14:02,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:02,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:02,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:14:02,638 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)] === [2024-06-20 15:14:02,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:02,639 INFO L85 PathProgramCache]: Analyzing trace with hash 180117326, now seen corresponding path program 8 times [2024-06-20 15:14:02,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:02,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824087215] [2024-06-20 15:14:02,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:02,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:02,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:02,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824087215] [2024-06-20 15:14:02,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824087215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:02,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:02,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:02,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831178924] [2024-06-20 15:14:02,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:02,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:02,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:02,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:02,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:02,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:02,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 277 transitions, 3480 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) [2024-06-20 15:14:02,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:02,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:02,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:03,189 INFO L124 PetriNetUnfolderBase]: 1710/2874 cut-off events. [2024-06-20 15:14:03,189 INFO L125 PetriNetUnfolderBase]: For 144196/144196 co-relation queries the response was YES. [2024-06-20 15:14:03,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18648 conditions, 2874 events. 1710/2874 cut-off events. For 144196/144196 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 16905 event pairs, 365 based on Foata normal form. 2/2869 useless extension candidates. Maximal degree in co-relation 18543. Up to 2376 conditions per place. [2024-06-20 15:14:03,218 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 190 selfloop transitions, 110 changer transitions 0/307 dead transitions. [2024-06-20 15:14:03,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 307 transitions, 4366 flow [2024-06-20 15:14:03,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:03,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:03,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-20 15:14:03,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-20 15:14:03,220 INFO L175 Difference]: Start difference. First operand has 224 places, 277 transitions, 3480 flow. Second operand 9 states and 217 transitions. [2024-06-20 15:14:03,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 307 transitions, 4366 flow [2024-06-20 15:14:03,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 307 transitions, 4216 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:03,601 INFO L231 Difference]: Finished difference. Result has 226 places, 277 transitions, 3577 flow [2024-06-20 15:14:03,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3338, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3577, PETRI_PLACES=226, PETRI_TRANSITIONS=277} [2024-06-20 15:14:03,601 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 185 predicate places. [2024-06-20 15:14:03,601 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 277 transitions, 3577 flow [2024-06-20 15:14:03,602 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) [2024-06-20 15:14:03,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:03,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:03,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:14:03,602 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)] === [2024-06-20 15:14:03,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:03,602 INFO L85 PathProgramCache]: Analyzing trace with hash 308144432, now seen corresponding path program 9 times [2024-06-20 15:14:03,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:03,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535441991] [2024-06-20 15:14:03,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:03,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:03,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:03,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535441991] [2024-06-20 15:14:03,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535441991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:03,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:03,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:03,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125334226] [2024-06-20 15:14:03,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:03,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:03,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:03,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:03,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:03,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:03,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 277 transitions, 3577 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) [2024-06-20 15:14:03,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:03,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:03,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:04,144 INFO L124 PetriNetUnfolderBase]: 1786/3018 cut-off events. [2024-06-20 15:14:04,144 INFO L125 PetriNetUnfolderBase]: For 144268/144271 co-relation queries the response was YES. [2024-06-20 15:14:04,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19653 conditions, 3018 events. 1786/3018 cut-off events. For 144268/144271 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 18040 event pairs, 352 based on Foata normal form. 6/3021 useless extension candidates. Maximal degree in co-relation 19549. Up to 2573 conditions per place. [2024-06-20 15:14:04,174 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 252 selfloop transitions, 75 changer transitions 0/334 dead transitions. [2024-06-20 15:14:04,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 334 transitions, 4857 flow [2024-06-20 15:14:04,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:04,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:04,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-20 15:14:04,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-20 15:14:04,175 INFO L175 Difference]: Start difference. First operand has 226 places, 277 transitions, 3577 flow. Second operand 6 states and 160 transitions. [2024-06-20 15:14:04,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 334 transitions, 4857 flow [2024-06-20 15:14:04,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 334 transitions, 4594 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-20 15:14:04,601 INFO L231 Difference]: Finished difference. Result has 224 places, 305 transitions, 4006 flow [2024-06-20 15:14:04,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3350, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4006, PETRI_PLACES=224, PETRI_TRANSITIONS=305} [2024-06-20 15:14:04,602 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-20 15:14:04,602 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 305 transitions, 4006 flow [2024-06-20 15:14:04,602 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) [2024-06-20 15:14:04,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:04,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:04,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:14:04,602 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)] === [2024-06-20 15:14:04,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:04,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1377573274, now seen corresponding path program 10 times [2024-06-20 15:14:04,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:04,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655343619] [2024-06-20 15:14:04,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:04,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:04,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:04,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655343619] [2024-06-20 15:14:04,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655343619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:04,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:04,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:04,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659938100] [2024-06-20 15:14:04,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:04,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:04,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:04,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:04,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:04,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:04,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 305 transitions, 4006 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) [2024-06-20 15:14:04,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:04,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:04,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:05,198 INFO L124 PetriNetUnfolderBase]: 1788/3025 cut-off events. [2024-06-20 15:14:05,198 INFO L125 PetriNetUnfolderBase]: For 133017/133023 co-relation queries the response was YES. [2024-06-20 15:14:05,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19951 conditions, 3025 events. 1788/3025 cut-off events. For 133017/133023 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 18093 event pairs, 352 based on Foata normal form. 6/3028 useless extension candidates. Maximal degree in co-relation 19847. Up to 2612 conditions per place. [2024-06-20 15:14:05,229 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 258 selfloop transitions, 69 changer transitions 0/334 dead transitions. [2024-06-20 15:14:05,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 334 transitions, 4776 flow [2024-06-20 15:14:05,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:05,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:05,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:14:05,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-20 15:14:05,230 INFO L175 Difference]: Start difference. First operand has 224 places, 305 transitions, 4006 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:14:05,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 334 transitions, 4776 flow [2024-06-20 15:14:05,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 334 transitions, 4700 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:05,764 INFO L231 Difference]: Finished difference. Result has 229 places, 308 transitions, 4138 flow [2024-06-20 15:14:05,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3930, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4138, PETRI_PLACES=229, PETRI_TRANSITIONS=308} [2024-06-20 15:14:05,764 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-20 15:14:05,764 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 308 transitions, 4138 flow [2024-06-20 15:14:05,765 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) [2024-06-20 15:14:05,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:05,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:05,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:14:05,765 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)] === [2024-06-20 15:14:05,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:05,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1911810702, now seen corresponding path program 11 times [2024-06-20 15:14:05,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:05,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143209504] [2024-06-20 15:14:05,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:05,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:05,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:05,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:05,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143209504] [2024-06-20 15:14:05,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143209504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:05,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:05,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:05,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526000746] [2024-06-20 15:14:05,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:05,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:05,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:05,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:05,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:05,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:05,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 308 transitions, 4138 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) [2024-06-20 15:14:05,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:05,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:05,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:06,391 INFO L124 PetriNetUnfolderBase]: 1814/3067 cut-off events. [2024-06-20 15:14:06,392 INFO L125 PetriNetUnfolderBase]: For 140703/140709 co-relation queries the response was YES. [2024-06-20 15:14:06,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20783 conditions, 3067 events. 1814/3067 cut-off events. For 140703/140709 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 18363 event pairs, 352 based on Foata normal form. 6/3070 useless extension candidates. Maximal degree in co-relation 20678. Up to 2507 conditions per place. [2024-06-20 15:14:06,428 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 220 selfloop transitions, 123 changer transitions 0/350 dead transitions. [2024-06-20 15:14:06,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 350 transitions, 5176 flow [2024-06-20 15:14:06,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:06,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:06,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-20 15:14:06,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6535714285714286 [2024-06-20 15:14:06,429 INFO L175 Difference]: Start difference. First operand has 229 places, 308 transitions, 4138 flow. Second operand 7 states and 183 transitions. [2024-06-20 15:14:06,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 350 transitions, 5176 flow [2024-06-20 15:14:06,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 350 transitions, 5003 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:06,900 INFO L231 Difference]: Finished difference. Result has 233 places, 320 transitions, 4482 flow [2024-06-20 15:14:06,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3965, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4482, PETRI_PLACES=233, PETRI_TRANSITIONS=320} [2024-06-20 15:14:06,901 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-20 15:14:06,901 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 320 transitions, 4482 flow [2024-06-20 15:14:06,901 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) [2024-06-20 15:14:06,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:06,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:06,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 15:14:06,901 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)] === [2024-06-20 15:14:06,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:06,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1911807726, now seen corresponding path program 4 times [2024-06-20 15:14:06,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:06,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977986500] [2024-06-20 15:14:06,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:06,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:07,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:07,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:07,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977986500] [2024-06-20 15:14:07,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977986500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:07,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:07,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:07,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489102001] [2024-06-20 15:14:07,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:07,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:07,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:07,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:07,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:07,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:07,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 320 transitions, 4482 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) [2024-06-20 15:14:07,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:07,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:07,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:07,590 INFO L124 PetriNetUnfolderBase]: 1837/3103 cut-off events. [2024-06-20 15:14:07,591 INFO L125 PetriNetUnfolderBase]: For 156638/156638 co-relation queries the response was YES. [2024-06-20 15:14:07,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21591 conditions, 3103 events. 1837/3103 cut-off events. For 156638/156638 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 18607 event pairs, 270 based on Foata normal form. 10/3111 useless extension candidates. Maximal degree in co-relation 21485. Up to 2720 conditions per place. [2024-06-20 15:14:07,627 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 312 selfloop transitions, 31 changer transitions 0/350 dead transitions. [2024-06-20 15:14:07,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 350 transitions, 5282 flow [2024-06-20 15:14:07,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:07,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:07,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-20 15:14:07,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-20 15:14:07,629 INFO L175 Difference]: Start difference. First operand has 233 places, 320 transitions, 4482 flow. Second operand 6 states and 154 transitions. [2024-06-20 15:14:07,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 350 transitions, 5282 flow [2024-06-20 15:14:08,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 350 transitions, 5131 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:08,050 INFO L231 Difference]: Finished difference. Result has 235 places, 321 transitions, 4416 flow [2024-06-20 15:14:08,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4331, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4416, PETRI_PLACES=235, PETRI_TRANSITIONS=321} [2024-06-20 15:14:08,051 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-20 15:14:08,051 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 321 transitions, 4416 flow [2024-06-20 15:14:08,051 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) [2024-06-20 15:14:08,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:08,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:08,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 15:14:08,052 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)] === [2024-06-20 15:14:08,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:08,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1982103572, now seen corresponding path program 2 times [2024-06-20 15:14:08,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:08,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016667883] [2024-06-20 15:14:08,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:08,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:08,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:08,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016667883] [2024-06-20 15:14:08,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016667883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:08,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:08,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:08,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969977638] [2024-06-20 15:14:08,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:08,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:08,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:08,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:08,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:08,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:14:08,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 321 transitions, 4416 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:08,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:08,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:14:08,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:08,670 INFO L124 PetriNetUnfolderBase]: 1826/3101 cut-off events. [2024-06-20 15:14:08,670 INFO L125 PetriNetUnfolderBase]: For 163703/163703 co-relation queries the response was YES. [2024-06-20 15:14:08,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21657 conditions, 3101 events. 1826/3101 cut-off events. For 163703/163703 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 18872 event pairs, 345 based on Foata normal form. 14/3098 useless extension candidates. Maximal degree in co-relation 21550. Up to 2575 conditions per place. [2024-06-20 15:14:08,707 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 255 selfloop transitions, 62 changer transitions 0/350 dead transitions. [2024-06-20 15:14:08,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 350 transitions, 5194 flow [2024-06-20 15:14:08,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:08,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:08,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 15:14:08,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-06-20 15:14:08,709 INFO L175 Difference]: Start difference. First operand has 235 places, 321 transitions, 4416 flow. Second operand 6 states and 159 transitions. [2024-06-20 15:14:08,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 350 transitions, 5194 flow [2024-06-20 15:14:09,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 350 transitions, 5133 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:09,092 INFO L231 Difference]: Finished difference. Result has 237 places, 324 transitions, 4550 flow [2024-06-20 15:14:09,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4355, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4550, PETRI_PLACES=237, PETRI_TRANSITIONS=324} [2024-06-20 15:14:09,093 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-20 15:14:09,093 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 324 transitions, 4550 flow [2024-06-20 15:14:09,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:09,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:09,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:09,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 15:14:09,093 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)] === [2024-06-20 15:14:09,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:09,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1377819724, now seen corresponding path program 3 times [2024-06-20 15:14:09,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:09,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598675753] [2024-06-20 15:14:09,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:09,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:09,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:09,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598675753] [2024-06-20 15:14:09,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598675753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:09,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:09,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:09,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740171599] [2024-06-20 15:14:09,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:09,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:09,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:09,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:09,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:09,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:14:09,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 324 transitions, 4550 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:09,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:09,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:14:09,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:09,745 INFO L124 PetriNetUnfolderBase]: 1866/3170 cut-off events. [2024-06-20 15:14:09,746 INFO L125 PetriNetUnfolderBase]: For 167958/167958 co-relation queries the response was YES. [2024-06-20 15:14:09,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22509 conditions, 3170 events. 1866/3170 cut-off events. For 167958/167958 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 19325 event pairs, 358 based on Foata normal form. 12/3165 useless extension candidates. Maximal degree in co-relation 22401. Up to 2638 conditions per place. [2024-06-20 15:14:09,782 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 246 selfloop transitions, 73 changer transitions 0/352 dead transitions. [2024-06-20 15:14:09,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 352 transitions, 5536 flow [2024-06-20 15:14:09,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:09,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:09,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:14:09,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-20 15:14:09,783 INFO L175 Difference]: Start difference. First operand has 237 places, 324 transitions, 4550 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:14:09,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 352 transitions, 5536 flow [2024-06-20 15:14:10,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 352 transitions, 5405 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:10,216 INFO L231 Difference]: Finished difference. Result has 240 places, 326 transitions, 4622 flow [2024-06-20 15:14:10,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4419, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4622, PETRI_PLACES=240, PETRI_TRANSITIONS=326} [2024-06-20 15:14:10,217 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 199 predicate places. [2024-06-20 15:14:10,217 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 326 transitions, 4622 flow [2024-06-20 15:14:10,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:10,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:10,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:10,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 15:14:10,218 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)] === [2024-06-20 15:14:10,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:10,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1967818772, now seen corresponding path program 4 times [2024-06-20 15:14:10,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:10,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528648061] [2024-06-20 15:14:10,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:10,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:10,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:10,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528648061] [2024-06-20 15:14:10,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528648061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:10,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:10,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:10,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942334315] [2024-06-20 15:14:10,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:10,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:10,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:10,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:10,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:10,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:14:10,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 326 transitions, 4622 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:10,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:10,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:14:10,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:10,872 INFO L124 PetriNetUnfolderBase]: 2023/3413 cut-off events. [2024-06-20 15:14:10,873 INFO L125 PetriNetUnfolderBase]: For 201437/201437 co-relation queries the response was YES. [2024-06-20 15:14:10,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24916 conditions, 3413 events. 2023/3413 cut-off events. For 201437/201437 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20874 event pairs, 304 based on Foata normal form. 14/3410 useless extension candidates. Maximal degree in co-relation 24807. Up to 2583 conditions per place. [2024-06-20 15:14:10,987 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 266 selfloop transitions, 64 changer transitions 0/363 dead transitions. [2024-06-20 15:14:10,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 363 transitions, 5624 flow [2024-06-20 15:14:10,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:10,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-20 15:14:10,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-06-20 15:14:10,988 INFO L175 Difference]: Start difference. First operand has 240 places, 326 transitions, 4622 flow. Second operand 6 states and 164 transitions. [2024-06-20 15:14:10,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 363 transitions, 5624 flow [2024-06-20 15:14:11,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 363 transitions, 5459 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:11,479 INFO L231 Difference]: Finished difference. Result has 242 places, 332 transitions, 4735 flow [2024-06-20 15:14:11,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4457, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4735, PETRI_PLACES=242, PETRI_TRANSITIONS=332} [2024-06-20 15:14:11,480 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 201 predicate places. [2024-06-20 15:14:11,480 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 332 transitions, 4735 flow [2024-06-20 15:14:11,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:11,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:11,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:11,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 15:14:11,480 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)] === [2024-06-20 15:14:11,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:11,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1851881108, now seen corresponding path program 1 times [2024-06-20 15:14:11,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:11,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477251759] [2024-06-20 15:14:11,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:11,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:11,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:11,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477251759] [2024-06-20 15:14:11,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477251759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:11,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:11,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:11,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947973697] [2024-06-20 15:14:11,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:11,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:11,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:11,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:11,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:11,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:11,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 332 transitions, 4735 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) [2024-06-20 15:14:11,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:11,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:11,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:12,147 INFO L124 PetriNetUnfolderBase]: 2119/3543 cut-off events. [2024-06-20 15:14:12,148 INFO L125 PetriNetUnfolderBase]: For 202439/202456 co-relation queries the response was YES. [2024-06-20 15:14:12,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26231 conditions, 3543 events. 2119/3543 cut-off events. For 202439/202456 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 21563 event pairs, 384 based on Foata normal form. 16/3552 useless extension candidates. Maximal degree in co-relation 26120. Up to 3027 conditions per place. [2024-06-20 15:14:12,192 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 282 selfloop transitions, 70 changer transitions 0/359 dead transitions. [2024-06-20 15:14:12,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 359 transitions, 5728 flow [2024-06-20 15:14:12,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:12,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:12,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-20 15:14:12,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-20 15:14:12,193 INFO L175 Difference]: Start difference. First operand has 242 places, 332 transitions, 4735 flow. Second operand 6 states and 145 transitions. [2024-06-20 15:14:12,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 359 transitions, 5728 flow [2024-06-20 15:14:12,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 359 transitions, 5639 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:12,747 INFO L231 Difference]: Finished difference. Result has 247 places, 340 transitions, 4952 flow [2024-06-20 15:14:12,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4648, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4952, PETRI_PLACES=247, PETRI_TRANSITIONS=340} [2024-06-20 15:14:12,747 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-20 15:14:12,748 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 340 transitions, 4952 flow [2024-06-20 15:14:12,748 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) [2024-06-20 15:14:12,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:12,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:12,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 15:14:12,748 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)] === [2024-06-20 15:14:12,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:12,748 INFO L85 PathProgramCache]: Analyzing trace with hash 2126529556, now seen corresponding path program 2 times [2024-06-20 15:14:12,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:12,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795405245] [2024-06-20 15:14:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:12,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:12,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:12,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795405245] [2024-06-20 15:14:12,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795405245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:12,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:12,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:12,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8069601] [2024-06-20 15:14:12,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:12,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:12,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:12,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:12,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:12,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:12,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 340 transitions, 4952 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) [2024-06-20 15:14:12,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:12,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:12,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:13,446 INFO L124 PetriNetUnfolderBase]: 2122/3556 cut-off events. [2024-06-20 15:14:13,447 INFO L125 PetriNetUnfolderBase]: For 206286/206303 co-relation queries the response was YES. [2024-06-20 15:14:13,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26515 conditions, 3556 events. 2122/3556 cut-off events. For 206286/206303 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 21716 event pairs, 443 based on Foata normal form. 16/3565 useless extension candidates. Maximal degree in co-relation 26401. Up to 3121 conditions per place. [2024-06-20 15:14:13,493 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 286 selfloop transitions, 63 changer transitions 0/356 dead transitions. [2024-06-20 15:14:13,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 356 transitions, 5726 flow [2024-06-20 15:14:13,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:13,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:13,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-20 15:14:13,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-20 15:14:13,495 INFO L175 Difference]: Start difference. First operand has 247 places, 340 transitions, 4952 flow. Second operand 6 states and 140 transitions. [2024-06-20 15:14:13,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 356 transitions, 5726 flow [2024-06-20 15:14:14,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 356 transitions, 5570 flow, removed 43 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:14,101 INFO L231 Difference]: Finished difference. Result has 251 places, 342 transitions, 4974 flow [2024-06-20 15:14:14,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4810, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4974, PETRI_PLACES=251, PETRI_TRANSITIONS=342} [2024-06-20 15:14:14,102 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 210 predicate places. [2024-06-20 15:14:14,102 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 342 transitions, 4974 flow [2024-06-20 15:14:14,102 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) [2024-06-20 15:14:14,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:14,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:14,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 15:14:14,102 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)] === [2024-06-20 15:14:14,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:14,103 INFO L85 PathProgramCache]: Analyzing trace with hash 299453396, now seen corresponding path program 3 times [2024-06-20 15:14:14,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:14,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119128092] [2024-06-20 15:14:14,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:14,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:14,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:14,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119128092] [2024-06-20 15:14:14,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119128092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:14,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:14,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:14,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004043780] [2024-06-20 15:14:14,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:14,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:14,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:14,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:14,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:14,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:14,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 342 transitions, 4974 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) [2024-06-20 15:14:14,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:14,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:14,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:14,795 INFO L124 PetriNetUnfolderBase]: 2136/3575 cut-off events. [2024-06-20 15:14:14,795 INFO L125 PetriNetUnfolderBase]: For 221039/221045 co-relation queries the response was YES. [2024-06-20 15:14:14,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26249 conditions, 3575 events. 2136/3575 cut-off events. For 221039/221045 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 21758 event pairs, 349 based on Foata normal form. 24/3596 useless extension candidates. Maximal degree in co-relation 26133. Up to 3042 conditions per place. [2024-06-20 15:14:14,903 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 298 selfloop transitions, 65 changer transitions 0/370 dead transitions. [2024-06-20 15:14:14,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 370 transitions, 5831 flow [2024-06-20 15:14:14,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-20 15:14:14,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:14:14,905 INFO L175 Difference]: Start difference. First operand has 251 places, 342 transitions, 4974 flow. Second operand 6 states and 156 transitions. [2024-06-20 15:14:14,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 370 transitions, 5831 flow [2024-06-20 15:14:15,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 370 transitions, 5683 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:15,327 INFO L231 Difference]: Finished difference. Result has 253 places, 344 transitions, 5017 flow [2024-06-20 15:14:15,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4826, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5017, PETRI_PLACES=253, PETRI_TRANSITIONS=344} [2024-06-20 15:14:15,327 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-20 15:14:15,327 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 344 transitions, 5017 flow [2024-06-20 15:14:15,327 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) [2024-06-20 15:14:15,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:15,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:15,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 15:14:15,328 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)] === [2024-06-20 15:14:15,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:15,328 INFO L85 PathProgramCache]: Analyzing trace with hash 842887714, now seen corresponding path program 1 times [2024-06-20 15:14:15,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:15,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469969765] [2024-06-20 15:14:15,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:15,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:15,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:15,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:15,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469969765] [2024-06-20 15:14:15,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469969765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:15,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:15,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:15,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823643748] [2024-06-20 15:14:15,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:15,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:15,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:15,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:15,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:15,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:15,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 344 transitions, 5017 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) [2024-06-20 15:14:15,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:15,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:15,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:16,052 INFO L124 PetriNetUnfolderBase]: 2141/3589 cut-off events. [2024-06-20 15:14:16,052 INFO L125 PetriNetUnfolderBase]: For 200574/200585 co-relation queries the response was YES. [2024-06-20 15:14:16,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26532 conditions, 3589 events. 2141/3589 cut-off events. For 200574/200585 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 21943 event pairs, 468 based on Foata normal form. 9/3590 useless extension candidates. Maximal degree in co-relation 26415. Up to 2960 conditions per place. [2024-06-20 15:14:16,106 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 242 selfloop transitions, 123 changer transitions 0/372 dead transitions. [2024-06-20 15:14:16,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 372 transitions, 6087 flow [2024-06-20 15:14:16,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 15:14:16,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:14:16,109 INFO L175 Difference]: Start difference. First operand has 253 places, 344 transitions, 5017 flow. Second operand 7 states and 170 transitions. [2024-06-20 15:14:16,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 372 transitions, 6087 flow [2024-06-20 15:14:16,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 372 transitions, 5947 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:16,648 INFO L231 Difference]: Finished difference. Result has 256 places, 347 transitions, 5175 flow [2024-06-20 15:14:16,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4877, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5175, PETRI_PLACES=256, PETRI_TRANSITIONS=347} [2024-06-20 15:14:16,650 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-20 15:14:16,651 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 347 transitions, 5175 flow [2024-06-20 15:14:16,651 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) [2024-06-20 15:14:16,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:16,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:16,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 15:14:16,651 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)] === [2024-06-20 15:14:16,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:16,652 INFO L85 PathProgramCache]: Analyzing trace with hash 297897448, now seen corresponding path program 1 times [2024-06-20 15:14:16,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:16,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830143600] [2024-06-20 15:14:16,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:16,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:16,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:16,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830143600] [2024-06-20 15:14:16,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830143600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:16,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:16,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:16,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789054178] [2024-06-20 15:14:16,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:16,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:16,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:16,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:16,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:16,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:16,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 347 transitions, 5175 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) [2024-06-20 15:14:16,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:16,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:16,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:17,376 INFO L124 PetriNetUnfolderBase]: 2162/3603 cut-off events. [2024-06-20 15:14:17,376 INFO L125 PetriNetUnfolderBase]: For 207622/207622 co-relation queries the response was YES. [2024-06-20 15:14:17,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27045 conditions, 3603 events. 2162/3603 cut-off events. For 207622/207622 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 21896 event pairs, 476 based on Foata normal form. 1/3589 useless extension candidates. Maximal degree in co-relation 26927. Up to 2751 conditions per place. [2024-06-20 15:14:17,418 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 187 selfloop transitions, 197 changer transitions 0/391 dead transitions. [2024-06-20 15:14:17,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 391 transitions, 6763 flow [2024-06-20 15:14:17,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:17,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:17,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 15:14:17,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:14:17,419 INFO L175 Difference]: Start difference. First operand has 256 places, 347 transitions, 5175 flow. Second operand 8 states and 200 transitions. [2024-06-20 15:14:17,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 391 transitions, 6763 flow [2024-06-20 15:14:17,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 391 transitions, 6362 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:17,874 INFO L231 Difference]: Finished difference. Result has 258 places, 360 transitions, 5454 flow [2024-06-20 15:14:17,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4774, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5454, PETRI_PLACES=258, PETRI_TRANSITIONS=360} [2024-06-20 15:14:17,875 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-20 15:14:17,875 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 360 transitions, 5454 flow [2024-06-20 15:14:17,875 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) [2024-06-20 15:14:17,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:17,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:17,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 15:14:17,876 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)] === [2024-06-20 15:14:17,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:17,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1958841838, now seen corresponding path program 2 times [2024-06-20 15:14:17,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:17,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381439699] [2024-06-20 15:14:17,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:17,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:17,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:17,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381439699] [2024-06-20 15:14:17,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381439699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:17,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:17,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:17,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819849466] [2024-06-20 15:14:17,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:17,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:17,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:17,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:17,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:18,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:18,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 360 transitions, 5454 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) [2024-06-20 15:14:18,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:18,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:18,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:18,585 INFO L124 PetriNetUnfolderBase]: 2167/3610 cut-off events. [2024-06-20 15:14:18,585 INFO L125 PetriNetUnfolderBase]: For 215007/215007 co-relation queries the response was YES. [2024-06-20 15:14:18,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27568 conditions, 3610 events. 2167/3610 cut-off events. For 215007/215007 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 21975 event pairs, 464 based on Foata normal form. 1/3596 useless extension candidates. Maximal degree in co-relation 27451. Up to 2995 conditions per place. [2024-06-20 15:14:18,627 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 242 selfloop transitions, 143 changer transitions 0/392 dead transitions. [2024-06-20 15:14:18,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 392 transitions, 6566 flow [2024-06-20 15:14:18,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:18,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:18,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:14:18,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-20 15:14:18,628 INFO L175 Difference]: Start difference. First operand has 258 places, 360 transitions, 5454 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:14:18,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 392 transitions, 6566 flow [2024-06-20 15:14:19,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 392 transitions, 6397 flow, removed 52 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:19,235 INFO L231 Difference]: Finished difference. Result has 264 places, 363 transitions, 5607 flow [2024-06-20 15:14:19,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5285, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5607, PETRI_PLACES=264, PETRI_TRANSITIONS=363} [2024-06-20 15:14:19,235 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 223 predicate places. [2024-06-20 15:14:19,235 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 363 transitions, 5607 flow [2024-06-20 15:14:19,235 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) [2024-06-20 15:14:19,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:19,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:19,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 15:14:19,236 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)] === [2024-06-20 15:14:19,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:19,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1020261220, now seen corresponding path program 2 times [2024-06-20 15:14:19,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:19,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058543534] [2024-06-20 15:14:19,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:19,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:19,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:19,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058543534] [2024-06-20 15:14:19,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058543534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:19,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:19,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:19,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184551442] [2024-06-20 15:14:19,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:19,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:19,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:19,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:19,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:19,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:19,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 363 transitions, 5607 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) [2024-06-20 15:14:19,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:19,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:19,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:19,956 INFO L124 PetriNetUnfolderBase]: 2196/3657 cut-off events. [2024-06-20 15:14:19,956 INFO L125 PetriNetUnfolderBase]: For 224559/224559 co-relation queries the response was YES. [2024-06-20 15:14:19,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27845 conditions, 3657 events. 2196/3657 cut-off events. For 224559/224559 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 22250 event pairs, 477 based on Foata normal form. 1/3643 useless extension candidates. Maximal degree in co-relation 27725. Up to 2780 conditions per place. [2024-06-20 15:14:20,001 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 187 selfloop transitions, 207 changer transitions 0/401 dead transitions. [2024-06-20 15:14:20,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 401 transitions, 7145 flow [2024-06-20 15:14:20,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:20,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:20,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 15:14:20,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.621875 [2024-06-20 15:14:20,003 INFO L175 Difference]: Start difference. First operand has 264 places, 363 transitions, 5607 flow. Second operand 8 states and 199 transitions. [2024-06-20 15:14:20,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 401 transitions, 7145 flow [2024-06-20 15:14:20,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 401 transitions, 6921 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:20,716 INFO L231 Difference]: Finished difference. Result has 267 places, 373 transitions, 5997 flow [2024-06-20 15:14:20,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5383, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5997, PETRI_PLACES=267, PETRI_TRANSITIONS=373} [2024-06-20 15:14:20,717 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-20 15:14:20,717 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 373 transitions, 5997 flow [2024-06-20 15:14:20,717 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) [2024-06-20 15:14:20,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:20,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:20,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 15:14:20,717 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)] === [2024-06-20 15:14:20,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:20,718 INFO L85 PathProgramCache]: Analyzing trace with hash -702458378, now seen corresponding path program 3 times [2024-06-20 15:14:20,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:20,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575720112] [2024-06-20 15:14:20,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:20,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:20,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:20,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575720112] [2024-06-20 15:14:20,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575720112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:20,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:20,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:20,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112922170] [2024-06-20 15:14:20,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:20,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:20,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:20,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:20,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:20,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:20,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 373 transitions, 5997 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) [2024-06-20 15:14:20,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:20,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:20,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:21,513 INFO L124 PetriNetUnfolderBase]: 2209/3680 cut-off events. [2024-06-20 15:14:21,514 INFO L125 PetriNetUnfolderBase]: For 235252/235252 co-relation queries the response was YES. [2024-06-20 15:14:21,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28354 conditions, 3680 events. 2209/3680 cut-off events. For 235252/235252 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 22431 event pairs, 464 based on Foata normal form. 1/3666 useless extension candidates. Maximal degree in co-relation 28232. Up to 3050 conditions per place. [2024-06-20 15:14:21,563 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 251 selfloop transitions, 149 changer transitions 0/407 dead transitions. [2024-06-20 15:14:21,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 407 transitions, 7311 flow [2024-06-20 15:14:21,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:21,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-20 15:14:21,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2024-06-20 15:14:21,564 INFO L175 Difference]: Start difference. First operand has 267 places, 373 transitions, 5997 flow. Second operand 9 states and 211 transitions. [2024-06-20 15:14:21,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 407 transitions, 7311 flow [2024-06-20 15:14:22,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 407 transitions, 6904 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:22,378 INFO L231 Difference]: Finished difference. Result has 272 places, 379 transitions, 5968 flow [2024-06-20 15:14:22,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5598, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5968, PETRI_PLACES=272, PETRI_TRANSITIONS=379} [2024-06-20 15:14:22,379 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-20 15:14:22,379 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 379 transitions, 5968 flow [2024-06-20 15:14:22,379 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) [2024-06-20 15:14:22,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:22,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:22,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 15:14:22,380 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)] === [2024-06-20 15:14:22,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:22,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1020024070, now seen corresponding path program 3 times [2024-06-20 15:14:22,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:22,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893172376] [2024-06-20 15:14:22,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:22,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:22,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:22,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:22,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893172376] [2024-06-20 15:14:22,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893172376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:22,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:22,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:22,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613288197] [2024-06-20 15:14:22,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:22,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:22,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:22,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:22,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:22,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:22,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 379 transitions, 5968 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) [2024-06-20 15:14:22,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:22,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:22,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:23,104 INFO L124 PetriNetUnfolderBase]: 2206/3673 cut-off events. [2024-06-20 15:14:23,104 INFO L125 PetriNetUnfolderBase]: For 239201/239201 co-relation queries the response was YES. [2024-06-20 15:14:23,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28150 conditions, 3673 events. 2206/3673 cut-off events. For 239201/239201 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 22399 event pairs, 480 based on Foata normal form. 1/3659 useless extension candidates. Maximal degree in co-relation 28027. Up to 2788 conditions per place. [2024-06-20 15:14:23,153 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 192 selfloop transitions, 208 changer transitions 0/407 dead transitions. [2024-06-20 15:14:23,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 407 transitions, 7340 flow [2024-06-20 15:14:23,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:23,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:23,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 15:14:23,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.621875 [2024-06-20 15:14:23,155 INFO L175 Difference]: Start difference. First operand has 272 places, 379 transitions, 5968 flow. Second operand 8 states and 199 transitions. [2024-06-20 15:14:23,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 407 transitions, 7340 flow [2024-06-20 15:14:23,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 407 transitions, 7022 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:23,899 INFO L231 Difference]: Finished difference. Result has 274 places, 379 transitions, 6072 flow [2024-06-20 15:14:23,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5650, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6072, PETRI_PLACES=274, PETRI_TRANSITIONS=379} [2024-06-20 15:14:23,901 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-20 15:14:23,901 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 379 transitions, 6072 flow [2024-06-20 15:14:23,901 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) [2024-06-20 15:14:23,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:23,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:23,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 15:14:23,901 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)] === [2024-06-20 15:14:23,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:23,902 INFO L85 PathProgramCache]: Analyzing trace with hash 754234534, now seen corresponding path program 1 times [2024-06-20 15:14:23,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:23,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682170926] [2024-06-20 15:14:23,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:23,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:24,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:24,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682170926] [2024-06-20 15:14:24,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682170926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:24,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:24,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:24,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375071208] [2024-06-20 15:14:24,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:24,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:24,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:24,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:24,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:24,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:24,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 379 transitions, 6072 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) [2024-06-20 15:14:24,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:24,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:24,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:24,765 INFO L124 PetriNetUnfolderBase]: 2259/3780 cut-off events. [2024-06-20 15:14:24,766 INFO L125 PetriNetUnfolderBase]: For 267726/267726 co-relation queries the response was YES. [2024-06-20 15:14:24,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29196 conditions, 3780 events. 2259/3780 cut-off events. For 267726/267726 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 23222 event pairs, 355 based on Foata normal form. 6/3784 useless extension candidates. Maximal degree in co-relation 29072. Up to 3213 conditions per place. [2024-06-20 15:14:24,809 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 351 selfloop transitions, 59 changer transitions 0/417 dead transitions. [2024-06-20 15:14:24,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 417 transitions, 7170 flow [2024-06-20 15:14:24,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:14:24,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:14:24,810 INFO L175 Difference]: Start difference. First operand has 274 places, 379 transitions, 6072 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:14:24,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 417 transitions, 7170 flow [2024-06-20 15:14:25,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 417 transitions, 6749 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:25,461 INFO L231 Difference]: Finished difference. Result has 277 places, 381 transitions, 5799 flow [2024-06-20 15:14:25,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5651, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5799, PETRI_PLACES=277, PETRI_TRANSITIONS=381} [2024-06-20 15:14:25,461 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-20 15:14:25,461 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 381 transitions, 5799 flow [2024-06-20 15:14:25,462 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) [2024-06-20 15:14:25,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:25,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:25,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 15:14:25,462 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)] === [2024-06-20 15:14:25,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:25,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1020258244, now seen corresponding path program 2 times [2024-06-20 15:14:25,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:25,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458672139] [2024-06-20 15:14:25,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:25,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:25,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:25,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458672139] [2024-06-20 15:14:25,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458672139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:25,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:25,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:25,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545205709] [2024-06-20 15:14:25,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:25,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:25,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:25,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:25,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:25,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:25,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 381 transitions, 5799 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) [2024-06-20 15:14:25,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:25,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:25,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:26,271 INFO L124 PetriNetUnfolderBase]: 2287/3828 cut-off events. [2024-06-20 15:14:26,271 INFO L125 PetriNetUnfolderBase]: For 277581/277581 co-relation queries the response was YES. [2024-06-20 15:14:26,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29164 conditions, 3828 events. 2287/3828 cut-off events. For 277581/277581 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 23602 event pairs, 437 based on Foata normal form. 8/3834 useless extension candidates. Maximal degree in co-relation 29039. Up to 3415 conditions per place. [2024-06-20 15:14:26,318 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 351 selfloop transitions, 52 changer transitions 0/410 dead transitions. [2024-06-20 15:14:26,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 410 transitions, 6715 flow [2024-06-20 15:14:26,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:26,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-20 15:14:26,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-20 15:14:26,320 INFO L175 Difference]: Start difference. First operand has 277 places, 381 transitions, 5799 flow. Second operand 8 states and 185 transitions. [2024-06-20 15:14:26,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 410 transitions, 6715 flow [2024-06-20 15:14:27,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 410 transitions, 6646 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:27,088 INFO L231 Difference]: Finished difference. Result has 281 places, 382 transitions, 5855 flow [2024-06-20 15:14:27,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5730, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5855, PETRI_PLACES=281, PETRI_TRANSITIONS=382} [2024-06-20 15:14:27,088 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-20 15:14:27,089 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 382 transitions, 5855 flow [2024-06-20 15:14:27,089 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) [2024-06-20 15:14:27,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:27,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:27,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 15:14:27,089 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)] === [2024-06-20 15:14:27,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:27,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1019931814, now seen corresponding path program 3 times [2024-06-20 15:14:27,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:27,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470366347] [2024-06-20 15:14:27,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:27,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:27,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:27,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470366347] [2024-06-20 15:14:27,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470366347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:27,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:27,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:27,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685710291] [2024-06-20 15:14:27,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:27,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:27,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:27,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:27,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:27,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:27,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 382 transitions, 5855 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) [2024-06-20 15:14:27,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:27,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:27,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:27,962 INFO L124 PetriNetUnfolderBase]: 2307/3860 cut-off events. [2024-06-20 15:14:27,962 INFO L125 PetriNetUnfolderBase]: For 281367/281367 co-relation queries the response was YES. [2024-06-20 15:14:28,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29548 conditions, 3860 events. 2307/3860 cut-off events. For 281367/281367 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 23853 event pairs, 435 based on Foata normal form. 6/3864 useless extension candidates. Maximal degree in co-relation 29421. Up to 3417 conditions per place. [2024-06-20 15:14:28,014 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 353 selfloop transitions, 54 changer transitions 0/414 dead transitions. [2024-06-20 15:14:28,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 414 transitions, 6799 flow [2024-06-20 15:14:28,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:28,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:28,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 15:14:28,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:14:28,015 INFO L175 Difference]: Start difference. First operand has 281 places, 382 transitions, 5855 flow. Second operand 8 states and 188 transitions. [2024-06-20 15:14:28,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 414 transitions, 6799 flow [2024-06-20 15:14:28,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 414 transitions, 6692 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:28,772 INFO L231 Difference]: Finished difference. Result has 283 places, 383 transitions, 5878 flow [2024-06-20 15:14:28,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5748, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5878, PETRI_PLACES=283, PETRI_TRANSITIONS=383} [2024-06-20 15:14:28,772 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-20 15:14:28,772 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 383 transitions, 5878 flow [2024-06-20 15:14:28,772 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) [2024-06-20 15:14:28,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:28,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:28,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 15:14:28,773 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)] === [2024-06-20 15:14:28,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:28,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1386185492, now seen corresponding path program 4 times [2024-06-20 15:14:28,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:28,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658219027] [2024-06-20 15:14:28,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:28,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:28,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:28,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658219027] [2024-06-20 15:14:28,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658219027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:28,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:28,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:28,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898192395] [2024-06-20 15:14:28,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:28,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:28,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:28,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:28,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:28,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:28,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 383 transitions, 5878 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) [2024-06-20 15:14:28,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:28,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:28,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:29,504 INFO L124 PetriNetUnfolderBase]: 2336/3910 cut-off events. [2024-06-20 15:14:29,504 INFO L125 PetriNetUnfolderBase]: For 289219/289230 co-relation queries the response was YES. [2024-06-20 15:14:29,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30136 conditions, 3910 events. 2336/3910 cut-off events. For 289219/289230 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24273 event pairs, 494 based on Foata normal form. 9/3911 useless extension candidates. Maximal degree in co-relation 30008. Up to 3285 conditions per place. [2024-06-20 15:14:29,552 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 286 selfloop transitions, 123 changer transitions 0/416 dead transitions. [2024-06-20 15:14:29,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 416 transitions, 7169 flow [2024-06-20 15:14:29,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:29,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:29,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 15:14:29,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-20 15:14:29,554 INFO L175 Difference]: Start difference. First operand has 283 places, 383 transitions, 5878 flow. Second operand 6 states and 148 transitions. [2024-06-20 15:14:29,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 416 transitions, 7169 flow [2024-06-20 15:14:30,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 416 transitions, 7053 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:30,357 INFO L231 Difference]: Finished difference. Result has 283 places, 395 transitions, 6168 flow [2024-06-20 15:14:30,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5762, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6168, PETRI_PLACES=283, PETRI_TRANSITIONS=395} [2024-06-20 15:14:30,358 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-20 15:14:30,358 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 395 transitions, 6168 flow [2024-06-20 15:14:30,358 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) [2024-06-20 15:14:30,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:30,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:30,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 15:14:30,359 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)] === [2024-06-20 15:14:30,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:30,359 INFO L85 PathProgramCache]: Analyzing trace with hash 278460364, now seen corresponding path program 5 times [2024-06-20 15:14:30,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:30,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576176887] [2024-06-20 15:14:30,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:30,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:30,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:30,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:30,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576176887] [2024-06-20 15:14:30,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576176887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:30,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:30,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:30,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22466959] [2024-06-20 15:14:30,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:30,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:30,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:30,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:30,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:30,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:30,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 395 transitions, 6168 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) [2024-06-20 15:14:30,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:30,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:30,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:31,196 INFO L124 PetriNetUnfolderBase]: 2341/3906 cut-off events. [2024-06-20 15:14:31,196 INFO L125 PetriNetUnfolderBase]: For 294730/294730 co-relation queries the response was YES. [2024-06-20 15:14:31,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30451 conditions, 3906 events. 2341/3906 cut-off events. For 294730/294730 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 24136 event pairs, 465 based on Foata normal form. 1/3898 useless extension candidates. Maximal degree in co-relation 30322. Up to 3438 conditions per place. [2024-06-20 15:14:31,246 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 334 selfloop transitions, 81 changer transitions 0/422 dead transitions. [2024-06-20 15:14:31,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 422 transitions, 7087 flow [2024-06-20 15:14:31,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:31,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:31,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:14:31,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-20 15:14:31,247 INFO L175 Difference]: Start difference. First operand has 283 places, 395 transitions, 6168 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:14:31,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 422 transitions, 7087 flow [2024-06-20 15:14:32,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 422 transitions, 6929 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:32,292 INFO L231 Difference]: Finished difference. Result has 289 places, 398 transitions, 6213 flow [2024-06-20 15:14:32,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6013, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6213, PETRI_PLACES=289, PETRI_TRANSITIONS=398} [2024-06-20 15:14:32,292 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-20 15:14:32,292 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 398 transitions, 6213 flow [2024-06-20 15:14:32,293 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) [2024-06-20 15:14:32,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:32,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:32,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 15:14:32,293 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)] === [2024-06-20 15:14:32,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:32,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1386065336, now seen corresponding path program 4 times [2024-06-20 15:14:32,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:32,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027736403] [2024-06-20 15:14:32,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:32,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:32,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:32,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027736403] [2024-06-20 15:14:32,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027736403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:32,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:32,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:32,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816637437] [2024-06-20 15:14:32,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:32,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:32,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:32,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:32,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:32,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:32,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 398 transitions, 6213 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) [2024-06-20 15:14:32,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:32,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:32,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:33,089 INFO L124 PetriNetUnfolderBase]: 2364/3944 cut-off events. [2024-06-20 15:14:33,090 INFO L125 PetriNetUnfolderBase]: For 305585/305585 co-relation queries the response was YES. [2024-06-20 15:14:33,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30838 conditions, 3944 events. 2364/3944 cut-off events. For 305585/305585 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 24430 event pairs, 476 based on Foata normal form. 1/3936 useless extension candidates. Maximal degree in co-relation 30708. Up to 3354 conditions per place. [2024-06-20 15:14:33,140 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 302 selfloop transitions, 128 changer transitions 0/437 dead transitions. [2024-06-20 15:14:33,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 437 transitions, 7737 flow [2024-06-20 15:14:33,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:33,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:33,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:14:33,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-20 15:14:33,141 INFO L175 Difference]: Start difference. First operand has 289 places, 398 transitions, 6213 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:14:33,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 437 transitions, 7737 flow [2024-06-20 15:14:34,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 437 transitions, 7575 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:34,137 INFO L231 Difference]: Finished difference. Result has 292 places, 410 transitions, 6531 flow [2024-06-20 15:14:34,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6051, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6531, PETRI_PLACES=292, PETRI_TRANSITIONS=410} [2024-06-20 15:14:34,218 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 251 predicate places. [2024-06-20 15:14:34,219 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 410 transitions, 6531 flow [2024-06-20 15:14:34,219 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) [2024-06-20 15:14:34,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:34,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:34,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 15:14:34,219 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)] === [2024-06-20 15:14:34,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:34,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1814182072, now seen corresponding path program 6 times [2024-06-20 15:14:34,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:34,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26628965] [2024-06-20 15:14:34,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:34,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:34,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:34,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26628965] [2024-06-20 15:14:34,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26628965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:34,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:34,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:34,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209385344] [2024-06-20 15:14:34,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:34,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:34,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:34,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:34,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:34,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:34,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 410 transitions, 6531 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) [2024-06-20 15:14:34,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:34,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:34,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:34,962 INFO L124 PetriNetUnfolderBase]: 2369/3966 cut-off events. [2024-06-20 15:14:34,963 INFO L125 PetriNetUnfolderBase]: For 317614/317631 co-relation queries the response was YES. [2024-06-20 15:14:34,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31206 conditions, 3966 events. 2369/3966 cut-off events. For 317614/317631 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 24676 event pairs, 474 based on Foata normal form. 13/3972 useless extension candidates. Maximal degree in co-relation 31074. Up to 3329 conditions per place. [2024-06-20 15:14:35,012 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 295 selfloop transitions, 141 changer transitions 0/443 dead transitions. [2024-06-20 15:14:35,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 443 transitions, 7933 flow [2024-06-20 15:14:35,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:35,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:35,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:14:35,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-20 15:14:35,014 INFO L175 Difference]: Start difference. First operand has 292 places, 410 transitions, 6531 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:14:35,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 443 transitions, 7933 flow [2024-06-20 15:14:35,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 443 transitions, 7728 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:35,953 INFO L231 Difference]: Finished difference. Result has 297 places, 413 transitions, 6651 flow [2024-06-20 15:14:35,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6326, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6651, PETRI_PLACES=297, PETRI_TRANSITIONS=413} [2024-06-20 15:14:35,954 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 256 predicate places. [2024-06-20 15:14:35,954 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 413 transitions, 6651 flow [2024-06-20 15:14:35,954 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) [2024-06-20 15:14:35,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:35,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:35,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 15:14:35,954 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)] === [2024-06-20 15:14:35,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:35,955 INFO L85 PathProgramCache]: Analyzing trace with hash 284001304, now seen corresponding path program 7 times [2024-06-20 15:14:35,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:35,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785252177] [2024-06-20 15:14:35,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:35,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:36,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:36,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785252177] [2024-06-20 15:14:36,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785252177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:36,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:36,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:36,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456761876] [2024-06-20 15:14:36,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:36,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:36,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:36,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:36,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:36,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:36,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 413 transitions, 6651 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) [2024-06-20 15:14:36,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:36,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:36,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:36,817 INFO L124 PetriNetUnfolderBase]: 2374/3975 cut-off events. [2024-06-20 15:14:36,818 INFO L125 PetriNetUnfolderBase]: For 326728/326745 co-relation queries the response was YES. [2024-06-20 15:14:36,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31450 conditions, 3975 events. 2374/3975 cut-off events. For 326728/326745 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 24772 event pairs, 474 based on Foata normal form. 13/3981 useless extension candidates. Maximal degree in co-relation 31317. Up to 3335 conditions per place. [2024-06-20 15:14:36,862 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 288 selfloop transitions, 148 changer transitions 0/443 dead transitions. [2024-06-20 15:14:36,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 443 transitions, 7915 flow [2024-06-20 15:14:36,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:36,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:36,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-20 15:14:36,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-20 15:14:36,863 INFO L175 Difference]: Start difference. First operand has 297 places, 413 transitions, 6651 flow. Second operand 9 states and 208 transitions. [2024-06-20 15:14:36,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 443 transitions, 7915 flow [2024-06-20 15:14:37,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 443 transitions, 7507 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:37,787 INFO L231 Difference]: Finished difference. Result has 299 places, 416 transitions, 6587 flow [2024-06-20 15:14:37,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6252, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6587, PETRI_PLACES=299, PETRI_TRANSITIONS=416} [2024-06-20 15:14:37,787 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 258 predicate places. [2024-06-20 15:14:37,787 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 416 transitions, 6587 flow [2024-06-20 15:14:37,788 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) [2024-06-20 15:14:37,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:37,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:37,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 15:14:37,788 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)] === [2024-06-20 15:14:37,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:37,788 INFO L85 PathProgramCache]: Analyzing trace with hash 917800396, now seen corresponding path program 1 times [2024-06-20 15:14:37,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:37,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765513126] [2024-06-20 15:14:37,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:37,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:37,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:37,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765513126] [2024-06-20 15:14:37,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765513126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:37,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:37,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:37,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256273525] [2024-06-20 15:14:37,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:37,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:37,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:37,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:37,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:37,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:37,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 416 transitions, 6587 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) [2024-06-20 15:14:37,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:37,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:37,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:38,561 INFO L124 PetriNetUnfolderBase]: 2392/3994 cut-off events. [2024-06-20 15:14:38,561 INFO L125 PetriNetUnfolderBase]: For 333069/333069 co-relation queries the response was YES. [2024-06-20 15:14:38,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31736 conditions, 3994 events. 2392/3994 cut-off events. For 333069/333069 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 24834 event pairs, 475 based on Foata normal form. 1/3986 useless extension candidates. Maximal degree in co-relation 31602. Up to 3426 conditions per place. [2024-06-20 15:14:38,613 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 324 selfloop transitions, 118 changer transitions 0/449 dead transitions. [2024-06-20 15:14:38,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 449 transitions, 8086 flow [2024-06-20 15:14:38,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 15:14:38,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-20 15:14:38,614 INFO L175 Difference]: Start difference. First operand has 299 places, 416 transitions, 6587 flow. Second operand 8 states and 190 transitions. [2024-06-20 15:14:38,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 449 transitions, 8086 flow [2024-06-20 15:14:39,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 449 transitions, 7830 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:39,624 INFO L231 Difference]: Finished difference. Result has 301 places, 425 transitions, 6698 flow [2024-06-20 15:14:39,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6331, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6698, PETRI_PLACES=301, PETRI_TRANSITIONS=425} [2024-06-20 15:14:39,625 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 260 predicate places. [2024-06-20 15:14:39,625 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 425 transitions, 6698 flow [2024-06-20 15:14:39,625 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) [2024-06-20 15:14:39,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:39,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:39,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 15:14:39,625 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)] === [2024-06-20 15:14:39,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:39,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1376805512, now seen corresponding path program 8 times [2024-06-20 15:14:39,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:39,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628141591] [2024-06-20 15:14:39,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:39,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:39,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:39,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628141591] [2024-06-20 15:14:39,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628141591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:39,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:39,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:39,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117985424] [2024-06-20 15:14:39,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:39,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:39,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:39,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:39,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:39,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:39,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 425 transitions, 6698 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) [2024-06-20 15:14:39,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:39,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:39,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:40,525 INFO L124 PetriNetUnfolderBase]: 2405/4016 cut-off events. [2024-06-20 15:14:40,526 INFO L125 PetriNetUnfolderBase]: For 343752/343752 co-relation queries the response was YES. [2024-06-20 15:14:40,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31953 conditions, 4016 events. 2405/4016 cut-off events. For 343752/343752 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 25035 event pairs, 464 based on Foata normal form. 1/4008 useless extension candidates. Maximal degree in co-relation 31818. Up to 3520 conditions per place. [2024-06-20 15:14:40,574 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 364 selfloop transitions, 88 changer transitions 0/459 dead transitions. [2024-06-20 15:14:40,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 459 transitions, 7888 flow [2024-06-20 15:14:40,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:14:40,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:14:40,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-20 15:14:40,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5477272727272727 [2024-06-20 15:14:40,576 INFO L175 Difference]: Start difference. First operand has 301 places, 425 transitions, 6698 flow. Second operand 11 states and 241 transitions. [2024-06-20 15:14:40,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 459 transitions, 7888 flow [2024-06-20 15:14:41,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 459 transitions, 7674 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:41,737 INFO L231 Difference]: Finished difference. Result has 310 places, 431 transitions, 6758 flow [2024-06-20 15:14:41,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6484, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6758, PETRI_PLACES=310, PETRI_TRANSITIONS=431} [2024-06-20 15:14:41,738 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 269 predicate places. [2024-06-20 15:14:41,738 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 431 transitions, 6758 flow [2024-06-20 15:14:41,738 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) [2024-06-20 15:14:41,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:41,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:41,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 15:14:41,739 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)] === [2024-06-20 15:14:41,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:41,739 INFO L85 PathProgramCache]: Analyzing trace with hash -379991526, now seen corresponding path program 2 times [2024-06-20 15:14:41,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:41,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75184478] [2024-06-20 15:14:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:41,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:41,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:41,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75184478] [2024-06-20 15:14:41,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75184478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:41,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:41,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:41,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383633285] [2024-06-20 15:14:41,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:41,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:41,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:41,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:41,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:41,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:41,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 431 transitions, 6758 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) [2024-06-20 15:14:41,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:41,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:41,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:42,581 INFO L124 PetriNetUnfolderBase]: 2402/4011 cut-off events. [2024-06-20 15:14:42,581 INFO L125 PetriNetUnfolderBase]: For 350348/350348 co-relation queries the response was YES. [2024-06-20 15:14:42,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31910 conditions, 4011 events. 2402/4011 cut-off events. For 350348/350348 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 24995 event pairs, 477 based on Foata normal form. 1/4003 useless extension candidates. Maximal degree in co-relation 31772. Up to 3441 conditions per place. [2024-06-20 15:14:42,635 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 329 selfloop transitions, 118 changer transitions 0/454 dead transitions. [2024-06-20 15:14:42,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 454 transitions, 8004 flow [2024-06-20 15:14:42,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:42,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:42,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-20 15:14:42,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584375 [2024-06-20 15:14:42,637 INFO L175 Difference]: Start difference. First operand has 310 places, 431 transitions, 6758 flow. Second operand 8 states and 187 transitions. [2024-06-20 15:14:42,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 454 transitions, 8004 flow [2024-06-20 15:14:43,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 454 transitions, 7808 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:43,844 INFO L231 Difference]: Finished difference. Result has 310 places, 431 transitions, 6804 flow [2024-06-20 15:14:43,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6562, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6804, PETRI_PLACES=310, PETRI_TRANSITIONS=431} [2024-06-20 15:14:43,845 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 269 predicate places. [2024-06-20 15:14:43,845 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 431 transitions, 6804 flow [2024-06-20 15:14:43,845 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) [2024-06-20 15:14:43,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:43,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:43,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 15:14:43,845 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)] === [2024-06-20 15:14:43,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:43,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1376811092, now seen corresponding path program 9 times [2024-06-20 15:14:43,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:43,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189623449] [2024-06-20 15:14:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:43,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:43,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:43,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:43,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189623449] [2024-06-20 15:14:43,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189623449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:43,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:43,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:43,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244137760] [2024-06-20 15:14:43,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:43,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:43,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:43,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:43,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:44,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:44,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 431 transitions, 6804 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) [2024-06-20 15:14:44,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:44,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:44,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:44,706 INFO L124 PetriNetUnfolderBase]: 2399/4008 cut-off events. [2024-06-20 15:14:44,706 INFO L125 PetriNetUnfolderBase]: For 356209/356209 co-relation queries the response was YES. [2024-06-20 15:14:44,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31989 conditions, 4008 events. 2399/4008 cut-off events. For 356209/356209 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 25000 event pairs, 464 based on Foata normal form. 1/4000 useless extension candidates. Maximal degree in co-relation 31850. Up to 3513 conditions per place. [2024-06-20 15:14:44,761 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 365 selfloop transitions, 88 changer transitions 0/460 dead transitions. [2024-06-20 15:14:44,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 460 transitions, 7780 flow [2024-06-20 15:14:44,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:14:44,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:14:44,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 276 transitions. [2024-06-20 15:14:44,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307692307692308 [2024-06-20 15:14:44,763 INFO L175 Difference]: Start difference. First operand has 310 places, 431 transitions, 6804 flow. Second operand 13 states and 276 transitions. [2024-06-20 15:14:44,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 460 transitions, 7780 flow [2024-06-20 15:14:45,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 460 transitions, 7530 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:45,846 INFO L231 Difference]: Finished difference. Result has 316 places, 431 transitions, 6736 flow [2024-06-20 15:14:45,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6554, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6736, PETRI_PLACES=316, PETRI_TRANSITIONS=431} [2024-06-20 15:14:45,846 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 275 predicate places. [2024-06-20 15:14:45,847 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 431 transitions, 6736 flow [2024-06-20 15:14:45,847 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) [2024-06-20 15:14:45,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:45,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:45,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 15:14:45,847 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)] === [2024-06-20 15:14:45,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:45,847 INFO L85 PathProgramCache]: Analyzing trace with hash 131205954, now seen corresponding path program 5 times [2024-06-20 15:14:45,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:45,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349789181] [2024-06-20 15:14:45,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:45,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:45,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:45,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349789181] [2024-06-20 15:14:45,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349789181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:45,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:45,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:45,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877221980] [2024-06-20 15:14:45,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:45,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:45,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:45,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:45,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:46,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:46,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 431 transitions, 6736 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) [2024-06-20 15:14:46,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:46,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:46,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:46,668 INFO L124 PetriNetUnfolderBase]: 2412/4028 cut-off events. [2024-06-20 15:14:46,668 INFO L125 PetriNetUnfolderBase]: For 367987/367987 co-relation queries the response was YES. [2024-06-20 15:14:46,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32274 conditions, 4028 events. 2412/4028 cut-off events. For 367987/367987 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25138 event pairs, 478 based on Foata normal form. 1/4020 useless extension candidates. Maximal degree in co-relation 32134. Up to 3411 conditions per place. [2024-06-20 15:14:46,721 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 316 selfloop transitions, 144 changer transitions 0/467 dead transitions. [2024-06-20 15:14:46,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 467 transitions, 8470 flow [2024-06-20 15:14:46,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:14:46,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:14:46,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-20 15:14:46,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5825 [2024-06-20 15:14:46,722 INFO L175 Difference]: Start difference. First operand has 316 places, 431 transitions, 6736 flow. Second operand 10 states and 233 transitions. [2024-06-20 15:14:46,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 467 transitions, 8470 flow [2024-06-20 15:14:47,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 467 transitions, 8290 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-20 15:14:47,992 INFO L231 Difference]: Finished difference. Result has 314 places, 437 transitions, 6984 flow [2024-06-20 15:14:47,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6556, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6984, PETRI_PLACES=314, PETRI_TRANSITIONS=437} [2024-06-20 15:14:47,993 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-20 15:14:47,993 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 437 transitions, 6984 flow [2024-06-20 15:14:47,993 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) [2024-06-20 15:14:47,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:47,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:47,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 15:14:47,994 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)] === [2024-06-20 15:14:47,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:47,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1376799746, now seen corresponding path program 6 times [2024-06-20 15:14:47,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:47,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530569706] [2024-06-20 15:14:47,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:47,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:48,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:48,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530569706] [2024-06-20 15:14:48,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530569706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:48,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:48,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:48,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165214514] [2024-06-20 15:14:48,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:48,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:48,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:48,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:48,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:48,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:48,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 437 transitions, 6984 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) [2024-06-20 15:14:48,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:48,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:48,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:48,849 INFO L124 PetriNetUnfolderBase]: 2409/4019 cut-off events. [2024-06-20 15:14:48,849 INFO L125 PetriNetUnfolderBase]: For 374178/374178 co-relation queries the response was YES. [2024-06-20 15:14:48,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32419 conditions, 4019 events. 2409/4019 cut-off events. For 374178/374178 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 25002 event pairs, 478 based on Foata normal form. 1/4011 useless extension candidates. Maximal degree in co-relation 32278. Up to 3408 conditions per place. [2024-06-20 15:14:48,902 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 314 selfloop transitions, 146 changer transitions 0/467 dead transitions. [2024-06-20 15:14:48,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 467 transitions, 8438 flow [2024-06-20 15:14:48,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:14:48,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:14:48,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-20 15:14:48,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5613636363636364 [2024-06-20 15:14:48,903 INFO L175 Difference]: Start difference. First operand has 314 places, 437 transitions, 6984 flow. Second operand 11 states and 247 transitions. [2024-06-20 15:14:48,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 467 transitions, 8438 flow [2024-06-20 15:14:50,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 467 transitions, 8064 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:50,090 INFO L231 Difference]: Finished difference. Result has 318 places, 437 transitions, 6908 flow [2024-06-20 15:14:50,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6610, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6908, PETRI_PLACES=318, PETRI_TRANSITIONS=437} [2024-06-20 15:14:50,091 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 277 predicate places. [2024-06-20 15:14:50,091 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 437 transitions, 6908 flow [2024-06-20 15:14:50,091 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) [2024-06-20 15:14:50,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:50,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:50,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 15:14:50,091 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)] === [2024-06-20 15:14:50,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:50,092 INFO L85 PathProgramCache]: Analyzing trace with hash -173458242, now seen corresponding path program 7 times [2024-06-20 15:14:50,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:50,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074272804] [2024-06-20 15:14:50,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:50,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:50,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:50,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074272804] [2024-06-20 15:14:50,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074272804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:50,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:50,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:50,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931719536] [2024-06-20 15:14:50,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:50,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:50,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:50,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:50,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:50,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:50,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 437 transitions, 6908 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) [2024-06-20 15:14:50,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:50,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:50,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:50,887 INFO L124 PetriNetUnfolderBase]: 2470/4105 cut-off events. [2024-06-20 15:14:50,888 INFO L125 PetriNetUnfolderBase]: For 406824/406824 co-relation queries the response was YES. [2024-06-20 15:14:50,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33837 conditions, 4105 events. 2470/4105 cut-off events. For 406824/406824 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 25561 event pairs, 518 based on Foata normal form. 1/4091 useless extension candidates. Maximal degree in co-relation 33695. Up to 3073 conditions per place. [2024-06-20 15:14:50,938 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 205 selfloop transitions, 267 changer transitions 0/479 dead transitions. [2024-06-20 15:14:50,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 479 transitions, 8972 flow [2024-06-20 15:14:50,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:50,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:50,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:14:50,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-20 15:14:50,940 INFO L175 Difference]: Start difference. First operand has 318 places, 437 transitions, 6908 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:14:50,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 479 transitions, 8972 flow [2024-06-20 15:14:52,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 479 transitions, 8660 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 15:14:52,316 INFO L231 Difference]: Finished difference. Result has 316 places, 457 transitions, 7580 flow [2024-06-20 15:14:52,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6608, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7580, PETRI_PLACES=316, PETRI_TRANSITIONS=457} [2024-06-20 15:14:52,317 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 275 predicate places. [2024-06-20 15:14:52,317 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 457 transitions, 7580 flow [2024-06-20 15:14:52,317 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) [2024-06-20 15:14:52,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:52,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:52,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 15:14:52,318 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)] === [2024-06-20 15:14:52,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:52,318 INFO L85 PathProgramCache]: Analyzing trace with hash -180689922, now seen corresponding path program 8 times [2024-06-20 15:14:52,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:52,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866132954] [2024-06-20 15:14:52,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:52,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:52,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:52,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866132954] [2024-06-20 15:14:52,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866132954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:52,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:52,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:52,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275873332] [2024-06-20 15:14:52,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:52,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:52,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:52,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:52,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:52,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:52,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 457 transitions, 7580 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) [2024-06-20 15:14:52,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:52,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:52,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:53,197 INFO L124 PetriNetUnfolderBase]: 2480/4136 cut-off events. [2024-06-20 15:14:53,197 INFO L125 PetriNetUnfolderBase]: For 418182/418182 co-relation queries the response was YES. [2024-06-20 15:14:53,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34436 conditions, 4136 events. 2480/4136 cut-off events. For 418182/418182 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 25900 event pairs, 478 based on Foata normal form. 1/4128 useless extension candidates. Maximal degree in co-relation 34293. Up to 3532 conditions per place. [2024-06-20 15:14:53,252 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 349 selfloop transitions, 131 changer transitions 0/487 dead transitions. [2024-06-20 15:14:53,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 487 transitions, 9335 flow [2024-06-20 15:14:53,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:14:53,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:14:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-20 15:14:53,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-20 15:14:53,254 INFO L175 Difference]: Start difference. First operand has 316 places, 457 transitions, 7580 flow. Second operand 10 states and 225 transitions. [2024-06-20 15:14:53,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 487 transitions, 9335 flow [2024-06-20 15:14:54,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 487 transitions, 8808 flow, removed 77 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:54,546 INFO L231 Difference]: Finished difference. Result has 323 places, 463 transitions, 7428 flow [2024-06-20 15:14:54,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7072, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7428, PETRI_PLACES=323, PETRI_TRANSITIONS=463} [2024-06-20 15:14:54,546 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 282 predicate places. [2024-06-20 15:14:54,546 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 463 transitions, 7428 flow [2024-06-20 15:14:54,547 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) [2024-06-20 15:14:54,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:54,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:54,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 15:14:54,547 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)] === [2024-06-20 15:14:54,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:54,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1323596708, now seen corresponding path program 9 times [2024-06-20 15:14:54,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:54,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923689727] [2024-06-20 15:14:54,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:54,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:54,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:54,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923689727] [2024-06-20 15:14:54,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923689727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:54,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:54,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:54,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206337498] [2024-06-20 15:14:54,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:54,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:54,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:54,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:54,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:54,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:54,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 463 transitions, 7428 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) [2024-06-20 15:14:54,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:54,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:54,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:55,360 INFO L124 PetriNetUnfolderBase]: 2485/4130 cut-off events. [2024-06-20 15:14:55,360 INFO L125 PetriNetUnfolderBase]: For 426645/426645 co-relation queries the response was YES. [2024-06-20 15:14:55,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34042 conditions, 4130 events. 2485/4130 cut-off events. For 426645/426645 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 25801 event pairs, 518 based on Foata normal form. 1/4116 useless extension candidates. Maximal degree in co-relation 33898. Up to 3083 conditions per place. [2024-06-20 15:14:55,415 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 213 selfloop transitions, 269 changer transitions 0/489 dead transitions. [2024-06-20 15:14:55,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 489 transitions, 9296 flow [2024-06-20 15:14:55,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:55,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:55,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 15:14:55,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-20 15:14:55,416 INFO L175 Difference]: Start difference. First operand has 323 places, 463 transitions, 7428 flow. Second operand 8 states and 195 transitions. [2024-06-20 15:14:55,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 489 transitions, 9296 flow [2024-06-20 15:14:56,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 489 transitions, 9050 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:56,829 INFO L231 Difference]: Finished difference. Result has 328 places, 466 transitions, 7776 flow [2024-06-20 15:14:56,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7182, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7776, PETRI_PLACES=328, PETRI_TRANSITIONS=466} [2024-06-20 15:14:56,830 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 287 predicate places. [2024-06-20 15:14:56,830 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 466 transitions, 7776 flow [2024-06-20 15:14:56,830 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) [2024-06-20 15:14:56,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:56,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:56,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 15:14:56,830 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)] === [2024-06-20 15:14:56,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:56,831 INFO L85 PathProgramCache]: Analyzing trace with hash -180701082, now seen corresponding path program 10 times [2024-06-20 15:14:56,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:56,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248553433] [2024-06-20 15:14:56,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:56,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:56,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:56,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248553433] [2024-06-20 15:14:56,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248553433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:56,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:56,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:56,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695459678] [2024-06-20 15:14:56,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:56,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:56,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:56,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:56,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:56,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:56,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 466 transitions, 7776 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) [2024-06-20 15:14:56,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:56,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:56,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:57,794 INFO L124 PetriNetUnfolderBase]: 2482/4138 cut-off events. [2024-06-20 15:14:57,795 INFO L125 PetriNetUnfolderBase]: For 434859/434859 co-relation queries the response was YES. [2024-06-20 15:14:57,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34446 conditions, 4138 events. 2482/4138 cut-off events. For 434859/434859 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 25925 event pairs, 478 based on Foata normal form. 1/4130 useless extension candidates. Maximal degree in co-relation 34301. Up to 3536 conditions per place. [2024-06-20 15:14:57,846 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 350 selfloop transitions, 130 changer transitions 0/487 dead transitions. [2024-06-20 15:14:57,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 487 transitions, 9272 flow [2024-06-20 15:14:57,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:57,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:57,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 15:14:57,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:14:57,847 INFO L175 Difference]: Start difference. First operand has 328 places, 466 transitions, 7776 flow. Second operand 8 states and 188 transitions. [2024-06-20 15:14:57,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 487 transitions, 9272 flow [2024-06-20 15:14:59,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 487 transitions, 8819 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:59,380 INFO L231 Difference]: Finished difference. Result has 333 places, 466 transitions, 7589 flow [2024-06-20 15:14:59,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7323, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7589, PETRI_PLACES=333, PETRI_TRANSITIONS=466} [2024-06-20 15:14:59,380 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 292 predicate places. [2024-06-20 15:14:59,380 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 466 transitions, 7589 flow [2024-06-20 15:14:59,380 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) [2024-06-20 15:14:59,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:59,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:59,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 15:14:59,381 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)] === [2024-06-20 15:14:59,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:59,381 INFO L85 PathProgramCache]: Analyzing trace with hash -180701268, now seen corresponding path program 10 times [2024-06-20 15:14:59,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:59,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291361287] [2024-06-20 15:14:59,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:59,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:59,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:59,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291361287] [2024-06-20 15:14:59,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291361287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:59,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:59,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:59,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701650170] [2024-06-20 15:14:59,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:59,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:59,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:59,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:59,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:59,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:59,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 466 transitions, 7589 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) [2024-06-20 15:14:59,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:59,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:59,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:00,292 INFO L124 PetriNetUnfolderBase]: 2495/4165 cut-off events. [2024-06-20 15:15:00,292 INFO L125 PetriNetUnfolderBase]: For 447090/447090 co-relation queries the response was YES. [2024-06-20 15:15:00,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34385 conditions, 4165 events. 2495/4165 cut-off events. For 447090/447090 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 26191 event pairs, 463 based on Foata normal form. 1/4157 useless extension candidates. Maximal degree in co-relation 34239. Up to 3666 conditions per place. [2024-06-20 15:15:00,349 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 413 selfloop transitions, 73 changer transitions 0/493 dead transitions. [2024-06-20 15:15:00,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 493 transitions, 8859 flow [2024-06-20 15:15:00,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:00,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:00,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-20 15:15:00,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545 [2024-06-20 15:15:00,351 INFO L175 Difference]: Start difference. First operand has 333 places, 466 transitions, 7589 flow. Second operand 10 states and 218 transitions. [2024-06-20 15:15:00,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 493 transitions, 8859 flow [2024-06-20 15:15:02,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 493 transitions, 8599 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:02,079 INFO L231 Difference]: Finished difference. Result has 337 places, 472 transitions, 7585 flow [2024-06-20 15:15:02,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7329, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7585, PETRI_PLACES=337, PETRI_TRANSITIONS=472} [2024-06-20 15:15:02,080 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-20 15:15:02,080 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 472 transitions, 7585 flow [2024-06-20 15:15:02,080 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) [2024-06-20 15:15:02,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:02,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:02,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 15:15:02,081 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)] === [2024-06-20 15:15:02,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:02,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1327327124, now seen corresponding path program 3 times [2024-06-20 15:15:02,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:02,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897601463] [2024-06-20 15:15:02,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:02,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:02,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:02,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897601463] [2024-06-20 15:15:02,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897601463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:02,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:02,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:02,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881399414] [2024-06-20 15:15:02,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:02,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:02,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:02,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:02,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:02,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:02,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 472 transitions, 7585 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) [2024-06-20 15:15:02,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:02,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:02,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:03,011 INFO L124 PetriNetUnfolderBase]: 2500/4174 cut-off events. [2024-06-20 15:15:03,011 INFO L125 PetriNetUnfolderBase]: For 457015/457015 co-relation queries the response was YES. [2024-06-20 15:15:03,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34464 conditions, 4174 events. 2500/4174 cut-off events. For 457015/457015 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 26233 event pairs, 479 based on Foata normal form. 1/4166 useless extension candidates. Maximal degree in co-relation 34316. Up to 3573 conditions per place. [2024-06-20 15:15:03,071 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 366 selfloop transitions, 122 changer transitions 0/495 dead transitions. [2024-06-20 15:15:03,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 495 transitions, 8993 flow [2024-06-20 15:15:03,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:15:03,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-20 15:15:03,073 INFO L175 Difference]: Start difference. First operand has 337 places, 472 transitions, 7585 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:15:03,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 495 transitions, 8993 flow [2024-06-20 15:15:04,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 495 transitions, 8829 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:04,791 INFO L231 Difference]: Finished difference. Result has 338 places, 475 transitions, 7723 flow [2024-06-20 15:15:04,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7421, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7723, PETRI_PLACES=338, PETRI_TRANSITIONS=475} [2024-06-20 15:15:04,792 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 297 predicate places. [2024-06-20 15:15:04,792 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 475 transitions, 7723 flow [2024-06-20 15:15:04,792 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) [2024-06-20 15:15:04,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:04,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:04,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 15:15:04,792 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)] === [2024-06-20 15:15:04,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:04,793 INFO L85 PathProgramCache]: Analyzing trace with hash 233811798, now seen corresponding path program 11 times [2024-06-20 15:15:04,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:04,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92230920] [2024-06-20 15:15:04,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:04,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:04,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:04,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92230920] [2024-06-20 15:15:04,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92230920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:04,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:04,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:04,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470100217] [2024-06-20 15:15:04,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:04,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:04,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:04,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:04,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:04,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:04,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 475 transitions, 7723 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) [2024-06-20 15:15:04,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:04,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:04,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:05,709 INFO L124 PetriNetUnfolderBase]: 2497/4172 cut-off events. [2024-06-20 15:15:05,710 INFO L125 PetriNetUnfolderBase]: For 463996/463996 co-relation queries the response was YES. [2024-06-20 15:15:05,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34584 conditions, 4172 events. 2497/4172 cut-off events. For 463996/463996 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 26256 event pairs, 463 based on Foata normal form. 1/4164 useless extension candidates. Maximal degree in co-relation 34435. Up to 3670 conditions per place. [2024-06-20 15:15:05,767 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 416 selfloop transitions, 73 changer transitions 0/496 dead transitions. [2024-06-20 15:15:05,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 496 transitions, 8751 flow [2024-06-20 15:15:05,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:15:05,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:15:05,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-20 15:15:05,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5318181818181819 [2024-06-20 15:15:05,770 INFO L175 Difference]: Start difference. First operand has 338 places, 475 transitions, 7723 flow. Second operand 11 states and 234 transitions. [2024-06-20 15:15:05,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 496 transitions, 8751 flow [2024-06-20 15:15:07,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 496 transitions, 8537 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:07,756 INFO L231 Difference]: Finished difference. Result has 344 places, 475 transitions, 7661 flow [2024-06-20 15:15:07,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7509, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7661, PETRI_PLACES=344, PETRI_TRANSITIONS=475} [2024-06-20 15:15:07,757 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 303 predicate places. [2024-06-20 15:15:07,757 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 475 transitions, 7661 flow [2024-06-20 15:15:07,757 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) [2024-06-20 15:15:07,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:07,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:07,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 15:15:07,758 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)] === [2024-06-20 15:15:07,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:07,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1327321544, now seen corresponding path program 4 times [2024-06-20 15:15:07,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:07,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469554450] [2024-06-20 15:15:07,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:07,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:07,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:07,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469554450] [2024-06-20 15:15:07,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469554450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:07,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:07,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:07,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774189831] [2024-06-20 15:15:07,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:07,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:07,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:07,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:07,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:07,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:07,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 475 transitions, 7661 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) [2024-06-20 15:15:07,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:07,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:07,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:08,645 INFO L124 PetriNetUnfolderBase]: 2510/4194 cut-off events. [2024-06-20 15:15:08,646 INFO L125 PetriNetUnfolderBase]: For 478511/478511 co-relation queries the response was YES. [2024-06-20 15:15:08,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34819 conditions, 4194 events. 2510/4194 cut-off events. For 478511/478511 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 26467 event pairs, 473 based on Foata normal form. 1/4186 useless extension candidates. Maximal degree in co-relation 34668. Up to 3584 conditions per place. [2024-06-20 15:15:08,705 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 369 selfloop transitions, 128 changer transitions 0/504 dead transitions. [2024-06-20 15:15:08,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 504 transitions, 9499 flow [2024-06-20 15:15:08,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:08,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:08,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-20 15:15:08,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-20 15:15:08,706 INFO L175 Difference]: Start difference. First operand has 344 places, 475 transitions, 7661 flow. Second operand 9 states and 208 transitions. [2024-06-20 15:15:08,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 504 transitions, 9499 flow [2024-06-20 15:15:10,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 504 transitions, 9349 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-20 15:15:10,840 INFO L231 Difference]: Finished difference. Result has 343 places, 481 transitions, 7883 flow [2024-06-20 15:15:10,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7511, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7883, PETRI_PLACES=343, PETRI_TRANSITIONS=481} [2024-06-20 15:15:10,840 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 302 predicate places. [2024-06-20 15:15:10,840 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 481 transitions, 7883 flow [2024-06-20 15:15:10,841 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) [2024-06-20 15:15:10,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:10,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:10,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 15:15:10,841 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)] === [2024-06-20 15:15:10,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:10,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1323596522, now seen corresponding path program 12 times [2024-06-20 15:15:10,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:10,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509934254] [2024-06-20 15:15:10,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:10,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:10,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:10,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509934254] [2024-06-20 15:15:10,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509934254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:10,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:10,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:10,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448582474] [2024-06-20 15:15:10,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:10,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:10,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:10,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:10,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:11,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:11,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 481 transitions, 7883 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) [2024-06-20 15:15:11,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:11,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:11,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:11,880 INFO L124 PetriNetUnfolderBase]: 2507/4183 cut-off events. [2024-06-20 15:15:11,881 INFO L125 PetriNetUnfolderBase]: For 486190/486190 co-relation queries the response was YES. [2024-06-20 15:15:11,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34974 conditions, 4183 events. 2507/4183 cut-off events. For 486190/486190 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26351 event pairs, 491 based on Foata normal form. 1/4169 useless extension candidates. Maximal degree in co-relation 34822. Up to 3470 conditions per place. [2024-06-20 15:15:11,931 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 317 selfloop transitions, 181 changer transitions 0/505 dead transitions. [2024-06-20 15:15:11,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 505 transitions, 9623 flow [2024-06-20 15:15:11,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:11,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-20 15:15:11,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565 [2024-06-20 15:15:11,933 INFO L175 Difference]: Start difference. First operand has 343 places, 481 transitions, 7883 flow. Second operand 10 states and 226 transitions. [2024-06-20 15:15:11,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 505 transitions, 9623 flow [2024-06-20 15:15:13,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 505 transitions, 9235 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:13,803 INFO L231 Difference]: Finished difference. Result has 346 places, 481 transitions, 7863 flow [2024-06-20 15:15:13,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7495, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7863, PETRI_PLACES=346, PETRI_TRANSITIONS=481} [2024-06-20 15:15:13,803 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 305 predicate places. [2024-06-20 15:15:13,803 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 481 transitions, 7863 flow [2024-06-20 15:15:13,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:13,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:13,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:13,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 15:15:13,804 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)] === [2024-06-20 15:15:13,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:13,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1334678588, now seen corresponding path program 11 times [2024-06-20 15:15:13,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:13,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267881572] [2024-06-20 15:15:13,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:13,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:13,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:13,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267881572] [2024-06-20 15:15:13,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267881572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:13,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:13,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:13,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320276041] [2024-06-20 15:15:13,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:13,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:13,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:13,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:13,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:13,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:13,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 481 transitions, 7863 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) [2024-06-20 15:15:13,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:13,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:13,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:14,716 INFO L124 PetriNetUnfolderBase]: 2504/4180 cut-off events. [2024-06-20 15:15:14,716 INFO L125 PetriNetUnfolderBase]: For 491532/491532 co-relation queries the response was YES. [2024-06-20 15:15:14,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34930 conditions, 4180 events. 2504/4180 cut-off events. For 491532/491532 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 26281 event pairs, 481 based on Foata normal form. 1/4172 useless extension candidates. Maximal degree in co-relation 34778. Up to 3573 conditions per place. [2024-06-20 15:15:14,773 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 361 selfloop transitions, 133 changer transitions 0/501 dead transitions. [2024-06-20 15:15:14,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 501 transitions, 9247 flow [2024-06-20 15:15:14,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:14,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:14,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:15:14,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-20 15:15:14,774 INFO L175 Difference]: Start difference. First operand has 346 places, 481 transitions, 7863 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:15:14,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 501 transitions, 9247 flow [2024-06-20 15:15:16,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 501 transitions, 8855 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-20 15:15:16,491 INFO L231 Difference]: Finished difference. Result has 348 places, 481 transitions, 7743 flow [2024-06-20 15:15:16,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7471, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7743, PETRI_PLACES=348, PETRI_TRANSITIONS=481} [2024-06-20 15:15:16,492 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 307 predicate places. [2024-06-20 15:15:16,492 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 481 transitions, 7743 flow [2024-06-20 15:15:16,492 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) [2024-06-20 15:15:16,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:16,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:16,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 15:15:16,493 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)] === [2024-06-20 15:15:16,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:16,493 INFO L85 PathProgramCache]: Analyzing trace with hash 461908620, now seen corresponding path program 5 times [2024-06-20 15:15:16,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:16,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951973239] [2024-06-20 15:15:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:16,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:16,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:16,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:16,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951973239] [2024-06-20 15:15:16,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951973239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:16,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:16,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:16,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130289197] [2024-06-20 15:15:16,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:16,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:16,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:16,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:16,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:16,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:16,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 481 transitions, 7743 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) [2024-06-20 15:15:16,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:16,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:16,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:17,442 INFO L124 PetriNetUnfolderBase]: 2509/4196 cut-off events. [2024-06-20 15:15:17,442 INFO L125 PetriNetUnfolderBase]: For 501743/501743 co-relation queries the response was YES. [2024-06-20 15:15:17,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34918 conditions, 4196 events. 2509/4196 cut-off events. For 501743/501743 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26508 event pairs, 479 based on Foata normal form. 1/4188 useless extension candidates. Maximal degree in co-relation 34765. Up to 3582 conditions per place. [2024-06-20 15:15:17,498 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 366 selfloop transitions, 133 changer transitions 0/506 dead transitions. [2024-06-20 15:15:17,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 506 transitions, 9364 flow [2024-06-20 15:15:17,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:17,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:17,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-20 15:15:17,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-06-20 15:15:17,500 INFO L175 Difference]: Start difference. First operand has 348 places, 481 transitions, 7743 flow. Second operand 9 states and 205 transitions. [2024-06-20 15:15:17,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 506 transitions, 9364 flow [2024-06-20 15:15:19,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 506 transitions, 9074 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:19,689 INFO L231 Difference]: Finished difference. Result has 350 places, 484 transitions, 7768 flow [2024-06-20 15:15:19,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7459, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7768, PETRI_PLACES=350, PETRI_TRANSITIONS=484} [2024-06-20 15:15:19,689 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 309 predicate places. [2024-06-20 15:15:19,690 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 484 transitions, 7768 flow [2024-06-20 15:15:19,690 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) [2024-06-20 15:15:19,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:19,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:19,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 15:15:19,690 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)] === [2024-06-20 15:15:19,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:19,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1323833858, now seen corresponding path program 12 times [2024-06-20 15:15:19,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:19,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391865819] [2024-06-20 15:15:19,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:19,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:19,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:19,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391865819] [2024-06-20 15:15:19,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391865819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:19,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:19,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:19,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131669893] [2024-06-20 15:15:19,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:19,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:19,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:19,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:19,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:19,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:19,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 484 transitions, 7768 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) [2024-06-20 15:15:19,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:19,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:19,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:20,577 INFO L124 PetriNetUnfolderBase]: 2506/4171 cut-off events. [2024-06-20 15:15:20,578 INFO L125 PetriNetUnfolderBase]: For 508571/508571 co-relation queries the response was YES. [2024-06-20 15:15:20,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34888 conditions, 4171 events. 2506/4171 cut-off events. For 508571/508571 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26213 event pairs, 525 based on Foata normal form. 1/4157 useless extension candidates. Maximal degree in co-relation 34734. Up to 3101 conditions per place. [2024-06-20 15:15:20,637 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 217 selfloop transitions, 283 changer transitions 0/507 dead transitions. [2024-06-20 15:15:20,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 507 transitions, 9712 flow [2024-06-20 15:15:20,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:20,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:20,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-20 15:15:20,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-20 15:15:20,638 INFO L175 Difference]: Start difference. First operand has 350 places, 484 transitions, 7768 flow. Second operand 8 states and 196 transitions. [2024-06-20 15:15:20,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 507 transitions, 9712 flow [2024-06-20 15:15:22,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 507 transitions, 9398 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:22,828 INFO L231 Difference]: Finished difference. Result has 351 places, 484 transitions, 8026 flow [2024-06-20 15:15:22,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7454, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8026, PETRI_PLACES=351, PETRI_TRANSITIONS=484} [2024-06-20 15:15:22,829 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 310 predicate places. [2024-06-20 15:15:22,829 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 484 transitions, 8026 flow [2024-06-20 15:15:22,829 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) [2024-06-20 15:15:22,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:22,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:22,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 15:15:22,830 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)] === [2024-06-20 15:15:22,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:22,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1323830882, now seen corresponding path program 4 times [2024-06-20 15:15:22,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:22,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868520907] [2024-06-20 15:15:22,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:22,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:22,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:22,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868520907] [2024-06-20 15:15:22,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868520907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:22,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:22,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:22,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921521069] [2024-06-20 15:15:22,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:22,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:22,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:22,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:22,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:22,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:22,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 484 transitions, 8026 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) [2024-06-20 15:15:22,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:22,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:22,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:23,709 INFO L124 PetriNetUnfolderBase]: 2534/4241 cut-off events. [2024-06-20 15:15:23,709 INFO L125 PetriNetUnfolderBase]: For 548820/548820 co-relation queries the response was YES. [2024-06-20 15:15:23,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35671 conditions, 4241 events. 2534/4241 cut-off events. For 548820/548820 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 26839 event pairs, 446 based on Foata normal form. 8/4247 useless extension candidates. Maximal degree in co-relation 35516. Up to 3768 conditions per place. [2024-06-20 15:15:23,769 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 451 selfloop transitions, 49 changer transitions 0/507 dead transitions. [2024-06-20 15:15:23,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 507 transitions, 9124 flow [2024-06-20 15:15:23,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:23,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:23,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-20 15:15:23,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-20 15:15:23,770 INFO L175 Difference]: Start difference. First operand has 351 places, 484 transitions, 8026 flow. Second operand 8 states and 181 transitions. [2024-06-20 15:15:23,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 507 transitions, 9124 flow [2024-06-20 15:15:25,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 507 transitions, 8506 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:25,823 INFO L231 Difference]: Finished difference. Result has 352 places, 485 transitions, 7531 flow [2024-06-20 15:15:25,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7408, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7531, PETRI_PLACES=352, PETRI_TRANSITIONS=485} [2024-06-20 15:15:25,823 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 311 predicate places. [2024-06-20 15:15:25,824 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 485 transitions, 7531 flow [2024-06-20 15:15:25,824 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) [2024-06-20 15:15:25,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:25,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:25,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 15:15:25,824 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)] === [2024-06-20 15:15:25,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:25,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1334555642, now seen corresponding path program 5 times [2024-06-20 15:15:25,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:25,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536434476] [2024-06-20 15:15:25,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:25,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:25,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:25,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536434476] [2024-06-20 15:15:25,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536434476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:25,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:25,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:25,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635035234] [2024-06-20 15:15:25,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:25,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:25,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:25,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:25,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:25,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:25,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 485 transitions, 7531 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) [2024-06-20 15:15:25,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:25,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:25,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:26,735 INFO L124 PetriNetUnfolderBase]: 2562/4289 cut-off events. [2024-06-20 15:15:26,735 INFO L125 PetriNetUnfolderBase]: For 556517/556517 co-relation queries the response was YES. [2024-06-20 15:15:26,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35443 conditions, 4289 events. 2562/4289 cut-off events. For 556517/556517 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 27209 event pairs, 452 based on Foata normal form. 8/4295 useless extension candidates. Maximal degree in co-relation 35287. Up to 3812 conditions per place. [2024-06-20 15:15:26,796 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 451 selfloop transitions, 50 changer transitions 0/508 dead transitions. [2024-06-20 15:15:26,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 508 transitions, 8633 flow [2024-06-20 15:15:26,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:26,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:26,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-20 15:15:26,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-20 15:15:26,797 INFO L175 Difference]: Start difference. First operand has 352 places, 485 transitions, 7531 flow. Second operand 8 states and 180 transitions. [2024-06-20 15:15:26,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 508 transitions, 8633 flow [2024-06-20 15:15:28,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 508 transitions, 8528 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 15:15:28,627 INFO L231 Difference]: Finished difference. Result has 354 places, 486 transitions, 7553 flow [2024-06-20 15:15:28,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7426, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7553, PETRI_PLACES=354, PETRI_TRANSITIONS=486} [2024-06-20 15:15:28,627 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 313 predicate places. [2024-06-20 15:15:28,628 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 486 transitions, 7553 flow [2024-06-20 15:15:28,628 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) [2024-06-20 15:15:28,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:28,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:28,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 15:15:28,628 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)] === [2024-06-20 15:15:28,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:28,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1323504452, now seen corresponding path program 6 times [2024-06-20 15:15:28,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:28,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693445973] [2024-06-20 15:15:28,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:28,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:28,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:28,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693445973] [2024-06-20 15:15:28,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693445973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:28,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:28,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:28,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608490412] [2024-06-20 15:15:28,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:28,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:28,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:28,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:28,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:28,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:28,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 486 transitions, 7553 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) [2024-06-20 15:15:28,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:28,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:28,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:29,545 INFO L124 PetriNetUnfolderBase]: 2582/4321 cut-off events. [2024-06-20 15:15:29,546 INFO L125 PetriNetUnfolderBase]: For 560093/560093 co-relation queries the response was YES. [2024-06-20 15:15:29,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35735 conditions, 4321 events. 2582/4321 cut-off events. For 560093/560093 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 27442 event pairs, 450 based on Foata normal form. 6/4325 useless extension candidates. Maximal degree in co-relation 35578. Up to 3782 conditions per place. [2024-06-20 15:15:29,607 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 453 selfloop transitions, 52 changer transitions 0/512 dead transitions. [2024-06-20 15:15:29,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 512 transitions, 8683 flow [2024-06-20 15:15:29,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:29,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-20 15:15:29,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-20 15:15:29,609 INFO L175 Difference]: Start difference. First operand has 354 places, 486 transitions, 7553 flow. Second operand 8 states and 183 transitions. [2024-06-20 15:15:29,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 512 transitions, 8683 flow [2024-06-20 15:15:31,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 512 transitions, 8574 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:15:31,784 INFO L231 Difference]: Finished difference. Result has 356 places, 487 transitions, 7576 flow [2024-06-20 15:15:31,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7444, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7576, PETRI_PLACES=356, PETRI_TRANSITIONS=487} [2024-06-20 15:15:31,785 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-20 15:15:31,785 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 487 transitions, 7576 flow [2024-06-20 15:15:31,785 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) [2024-06-20 15:15:31,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:31,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:31,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 15:15:31,786 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)] === [2024-06-20 15:15:31,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:31,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1334955356, now seen corresponding path program 1 times [2024-06-20 15:15:31,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:31,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437023124] [2024-06-20 15:15:31,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:31,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:31,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:31,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:31,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437023124] [2024-06-20 15:15:31,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437023124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:31,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:31,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:31,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883738405] [2024-06-20 15:15:31,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:31,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:31,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:31,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:31,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:31,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:31,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 487 transitions, 7576 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) [2024-06-20 15:15:31,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:31,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:31,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:32,827 INFO L124 PetriNetUnfolderBase]: 2602/4355 cut-off events. [2024-06-20 15:15:32,827 INFO L125 PetriNetUnfolderBase]: For 571353/571353 co-relation queries the response was YES. [2024-06-20 15:15:32,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35999 conditions, 4355 events. 2602/4355 cut-off events. For 571353/571353 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 27658 event pairs, 456 based on Foata normal form. 6/4359 useless extension candidates. Maximal degree in co-relation 35841. Up to 3782 conditions per place. [2024-06-20 15:15:32,885 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 454 selfloop transitions, 54 changer transitions 0/515 dead transitions. [2024-06-20 15:15:32,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 515 transitions, 8732 flow [2024-06-20 15:15:32,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:32,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:32,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-20 15:15:32,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-20 15:15:32,886 INFO L175 Difference]: Start difference. First operand has 356 places, 487 transitions, 7576 flow. Second operand 8 states and 182 transitions. [2024-06-20 15:15:32,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 515 transitions, 8732 flow [2024-06-20 15:15:35,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 515 transitions, 8614 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 15:15:35,020 INFO L231 Difference]: Finished difference. Result has 359 places, 490 transitions, 7624 flow [2024-06-20 15:15:35,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7458, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7624, PETRI_PLACES=359, PETRI_TRANSITIONS=490} [2024-06-20 15:15:35,021 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 318 predicate places. [2024-06-20 15:15:35,021 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 490 transitions, 7624 flow [2024-06-20 15:15:35,021 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) [2024-06-20 15:15:35,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:35,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:35,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 15:15:35,021 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)] === [2024-06-20 15:15:35,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:35,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1171454536, now seen corresponding path program 13 times [2024-06-20 15:15:35,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:35,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53980837] [2024-06-20 15:15:35,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:35,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:35,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:35,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53980837] [2024-06-20 15:15:35,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53980837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:35,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:35,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:35,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605670512] [2024-06-20 15:15:35,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:35,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:35,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:35,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:35,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:35,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:35,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 490 transitions, 7624 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) [2024-06-20 15:15:35,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:35,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:35,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:35,993 INFO L124 PetriNetUnfolderBase]: 2599/4359 cut-off events. [2024-06-20 15:15:35,993 INFO L125 PetriNetUnfolderBase]: For 561660/561677 co-relation queries the response was YES. [2024-06-20 15:15:36,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36055 conditions, 4359 events. 2599/4359 cut-off events. For 561660/561677 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 27845 event pairs, 493 based on Foata normal form. 13/4365 useless extension candidates. Maximal degree in co-relation 35895. Up to 3664 conditions per place. [2024-06-20 15:15:36,056 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 350 selfloop transitions, 160 changer transitions 0/517 dead transitions. [2024-06-20 15:15:36,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 517 transitions, 8898 flow [2024-06-20 15:15:36,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:36,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:36,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-20 15:15:36,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-20 15:15:36,057 INFO L175 Difference]: Start difference. First operand has 359 places, 490 transitions, 7624 flow. Second operand 10 states and 225 transitions. [2024-06-20 15:15:36,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 517 transitions, 8898 flow [2024-06-20 15:15:38,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 517 transitions, 8824 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:38,260 INFO L231 Difference]: Finished difference. Result has 365 places, 490 transitions, 7876 flow [2024-06-20 15:15:38,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7550, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7876, PETRI_PLACES=365, PETRI_TRANSITIONS=490} [2024-06-20 15:15:38,261 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-20 15:15:38,261 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 490 transitions, 7876 flow [2024-06-20 15:15:38,261 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) [2024-06-20 15:15:38,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:38,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:38,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 15:15:38,261 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)] === [2024-06-20 15:15:38,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:38,262 INFO L85 PathProgramCache]: Analyzing trace with hash -64770464, now seen corresponding path program 6 times [2024-06-20 15:15:38,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:38,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650293631] [2024-06-20 15:15:38,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:38,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:38,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:38,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650293631] [2024-06-20 15:15:38,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650293631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:38,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:38,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:38,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730461651] [2024-06-20 15:15:38,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:38,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:38,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:38,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:38,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:38,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:38,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 490 transitions, 7876 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) [2024-06-20 15:15:38,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:38,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:38,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:39,304 INFO L124 PetriNetUnfolderBase]: 2604/4364 cut-off events. [2024-06-20 15:15:39,304 INFO L125 PetriNetUnfolderBase]: For 573867/573884 co-relation queries the response was YES. [2024-06-20 15:15:39,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36614 conditions, 4364 events. 2604/4364 cut-off events. For 573867/573884 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 27860 event pairs, 510 based on Foata normal form. 13/4370 useless extension candidates. Maximal degree in co-relation 36452. Up to 3732 conditions per place. [2024-06-20 15:15:39,367 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 375 selfloop transitions, 128 changer transitions 0/510 dead transitions. [2024-06-20 15:15:39,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 510 transitions, 9539 flow [2024-06-20 15:15:39,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:39,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:39,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-20 15:15:39,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-20 15:15:39,368 INFO L175 Difference]: Start difference. First operand has 365 places, 490 transitions, 7876 flow. Second operand 7 states and 164 transitions. [2024-06-20 15:15:39,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 510 transitions, 9539 flow [2024-06-20 15:15:42,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 510 transitions, 9249 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:42,488 INFO L231 Difference]: Finished difference. Result has 365 places, 493 transitions, 7895 flow [2024-06-20 15:15:42,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7586, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7895, PETRI_PLACES=365, PETRI_TRANSITIONS=493} [2024-06-20 15:15:42,488 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-20 15:15:42,489 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 493 transitions, 7895 flow [2024-06-20 15:15:42,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:42,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:42,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:42,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 15:15:42,489 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)] === [2024-06-20 15:15:42,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:42,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1498046826, now seen corresponding path program 7 times [2024-06-20 15:15:42,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:42,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260604473] [2024-06-20 15:15:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:42,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:42,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:42,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260604473] [2024-06-20 15:15:42,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260604473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:42,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:42,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:42,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507762489] [2024-06-20 15:15:42,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:42,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:42,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:42,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:42,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:42,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:42,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 493 transitions, 7895 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) [2024-06-20 15:15:42,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:42,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:42,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:43,423 INFO L124 PetriNetUnfolderBase]: 2601/4364 cut-off events. [2024-06-20 15:15:43,423 INFO L125 PetriNetUnfolderBase]: For 580633/580650 co-relation queries the response was YES. [2024-06-20 15:15:43,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36517 conditions, 4364 events. 2601/4364 cut-off events. For 580633/580650 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 27925 event pairs, 512 based on Foata normal form. 13/4370 useless extension candidates. Maximal degree in co-relation 36354. Up to 3729 conditions per place. [2024-06-20 15:15:43,487 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 374 selfloop transitions, 128 changer transitions 0/509 dead transitions. [2024-06-20 15:15:43,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 509 transitions, 9321 flow [2024-06-20 15:15:43,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:43,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:43,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-20 15:15:43,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-20 15:15:43,489 INFO L175 Difference]: Start difference. First operand has 365 places, 493 transitions, 7895 flow. Second operand 7 states and 162 transitions. [2024-06-20 15:15:43,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 509 transitions, 9321 flow [2024-06-20 15:15:45,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 509 transitions, 8927 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 15:15:45,856 INFO L231 Difference]: Finished difference. Result has 366 places, 493 transitions, 7763 flow [2024-06-20 15:15:45,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7501, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7763, PETRI_PLACES=366, PETRI_TRANSITIONS=493} [2024-06-20 15:15:45,857 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-20 15:15:45,857 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 493 transitions, 7763 flow [2024-06-20 15:15:45,857 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) [2024-06-20 15:15:45,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:45,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:45,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 15:15:45,858 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)] === [2024-06-20 15:15:45,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:45,858 INFO L85 PathProgramCache]: Analyzing trace with hash 500224502, now seen corresponding path program 13 times [2024-06-20 15:15:45,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:45,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548524566] [2024-06-20 15:15:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:45,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:45,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:45,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548524566] [2024-06-20 15:15:45,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548524566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:45,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:45,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:45,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817253401] [2024-06-20 15:15:45,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:45,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:45,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:45,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:45,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:46,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:46,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 493 transitions, 7763 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) [2024-06-20 15:15:46,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:46,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:46,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:46,790 INFO L124 PetriNetUnfolderBase]: 2611/4365 cut-off events. [2024-06-20 15:15:46,790 INFO L125 PetriNetUnfolderBase]: For 592133/592133 co-relation queries the response was YES. [2024-06-20 15:15:46,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36529 conditions, 4365 events. 2611/4365 cut-off events. For 592133/592133 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 27805 event pairs, 502 based on Foata normal form. 2/4358 useless extension candidates. Maximal degree in co-relation 36366. Up to 3373 conditions per place. [2024-06-20 15:15:46,852 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 248 selfloop transitions, 275 changer transitions 0/530 dead transitions. [2024-06-20 15:15:46,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 530 transitions, 9774 flow [2024-06-20 15:15:46,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:46,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:46,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:15:46,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.634375 [2024-06-20 15:15:46,853 INFO L175 Difference]: Start difference. First operand has 366 places, 493 transitions, 7763 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:15:46,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 530 transitions, 9774 flow [2024-06-20 15:15:49,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 530 transitions, 9478 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 15:15:49,768 INFO L231 Difference]: Finished difference. Result has 369 places, 499 transitions, 8243 flow [2024-06-20 15:15:49,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7467, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8243, PETRI_PLACES=369, PETRI_TRANSITIONS=499} [2024-06-20 15:15:49,768 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-20 15:15:49,768 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 499 transitions, 8243 flow [2024-06-20 15:15:49,768 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) [2024-06-20 15:15:49,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:49,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:49,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 15:15:49,769 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)] === [2024-06-20 15:15:49,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:49,769 INFO L85 PathProgramCache]: Analyzing trace with hash -274428176, now seen corresponding path program 14 times [2024-06-20 15:15:49,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:49,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923053353] [2024-06-20 15:15:49,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:49,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:49,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:49,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:49,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923053353] [2024-06-20 15:15:49,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923053353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:49,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:49,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:49,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957736262] [2024-06-20 15:15:49,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:49,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:49,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:49,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:49,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:49,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:49,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 499 transitions, 8243 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) [2024-06-20 15:15:49,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:49,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:49,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:50,733 INFO L124 PetriNetUnfolderBase]: 2608/4365 cut-off events. [2024-06-20 15:15:50,733 INFO L125 PetriNetUnfolderBase]: For 596577/596577 co-relation queries the response was YES. [2024-06-20 15:15:50,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37086 conditions, 4365 events. 2608/4365 cut-off events. For 596577/596577 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 27836 event pairs, 485 based on Foata normal form. 1/4357 useless extension candidates. Maximal degree in co-relation 36921. Up to 3678 conditions per place. [2024-06-20 15:15:50,800 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 361 selfloop transitions, 159 changer transitions 0/527 dead transitions. [2024-06-20 15:15:50,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 527 transitions, 9549 flow [2024-06-20 15:15:50,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:50,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:50,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:15:50,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-20 15:15:50,802 INFO L175 Difference]: Start difference. First operand has 369 places, 499 transitions, 8243 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:15:50,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 527 transitions, 9549 flow [2024-06-20 15:15:53,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 527 transitions, 8991 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:53,367 INFO L231 Difference]: Finished difference. Result has 369 places, 499 transitions, 8017 flow [2024-06-20 15:15:53,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7689, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8017, PETRI_PLACES=369, PETRI_TRANSITIONS=499} [2024-06-20 15:15:53,367 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-20 15:15:53,367 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 499 transitions, 8017 flow [2024-06-20 15:15:53,368 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) [2024-06-20 15:15:53,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:53,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:53,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 15:15:53,368 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)] === [2024-06-20 15:15:53,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:53,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1518006804, now seen corresponding path program 8 times [2024-06-20 15:15:53,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:53,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618276467] [2024-06-20 15:15:53,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:53,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:53,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:53,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618276467] [2024-06-20 15:15:53,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618276467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:53,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:53,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:53,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361493015] [2024-06-20 15:15:53,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:53,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:53,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:53,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:53,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:53,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:53,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 499 transitions, 8017 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) [2024-06-20 15:15:53,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:53,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:53,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:54,274 INFO L124 PetriNetUnfolderBase]: 2605/4362 cut-off events. [2024-06-20 15:15:54,274 INFO L125 PetriNetUnfolderBase]: For 579195/579195 co-relation queries the response was YES. [2024-06-20 15:15:54,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36597 conditions, 4362 events. 2605/4362 cut-off events. For 579195/579195 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 27803 event pairs, 492 based on Foata normal form. 1/4354 useless extension candidates. Maximal degree in co-relation 36432. Up to 3736 conditions per place. [2024-06-20 15:15:54,343 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 378 selfloop transitions, 134 changer transitions 0/519 dead transitions. [2024-06-20 15:15:54,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 519 transitions, 9671 flow [2024-06-20 15:15:54,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:54,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:54,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 15:15:54,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-20 15:15:54,344 INFO L175 Difference]: Start difference. First operand has 369 places, 499 transitions, 8017 flow. Second operand 7 states and 169 transitions. [2024-06-20 15:15:54,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 519 transitions, 9671 flow [2024-06-20 15:15:57,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 519 transitions, 9401 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 15:15:57,132 INFO L231 Difference]: Finished difference. Result has 370 places, 499 transitions, 8035 flow [2024-06-20 15:15:57,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7753, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8035, PETRI_PLACES=370, PETRI_TRANSITIONS=499} [2024-06-20 15:15:57,133 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 329 predicate places. [2024-06-20 15:15:57,133 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 499 transitions, 8035 flow [2024-06-20 15:15:57,133 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) [2024-06-20 15:15:57,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:57,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:57,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 15:15:57,134 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)] === [2024-06-20 15:15:57,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:57,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1288676292, now seen corresponding path program 15 times [2024-06-20 15:15:57,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:57,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358009941] [2024-06-20 15:15:57,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:57,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:57,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:57,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358009941] [2024-06-20 15:15:57,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358009941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:57,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:57,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:57,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977339486] [2024-06-20 15:15:57,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:57,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:57,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:57,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:57,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:57,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:57,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 499 transitions, 8035 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) [2024-06-20 15:15:57,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:57,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:57,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:58,090 INFO L124 PetriNetUnfolderBase]: 2602/4358 cut-off events. [2024-06-20 15:15:58,090 INFO L125 PetriNetUnfolderBase]: For 574442/574442 co-relation queries the response was YES. [2024-06-20 15:15:58,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36430 conditions, 4358 events. 2602/4358 cut-off events. For 574442/574442 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 27806 event pairs, 482 based on Foata normal form. 1/4350 useless extension candidates. Maximal degree in co-relation 36264. Up to 3671 conditions per place. [2024-06-20 15:15:58,154 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 362 selfloop transitions, 162 changer transitions 0/531 dead transitions. [2024-06-20 15:15:58,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 531 transitions, 9549 flow [2024-06-20 15:15:58,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:15:58,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:15:58,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 251 transitions. [2024-06-20 15:15:58,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5704545454545454 [2024-06-20 15:15:58,155 INFO L175 Difference]: Start difference. First operand has 370 places, 499 transitions, 8035 flow. Second operand 11 states and 251 transitions. [2024-06-20 15:15:58,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 531 transitions, 9549 flow [2024-06-20 15:16:01,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 531 transitions, 9198 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 15:16:01,109 INFO L231 Difference]: Finished difference. Result has 373 places, 499 transitions, 8030 flow [2024-06-20 15:16:01,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7692, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8030, PETRI_PLACES=373, PETRI_TRANSITIONS=499} [2024-06-20 15:16:01,110 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-20 15:16:01,110 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 499 transitions, 8030 flow [2024-06-20 15:16:01,110 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) [2024-06-20 15:16:01,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:01,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:01,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 15:16:01,110 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)] === [2024-06-20 15:16:01,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:01,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1288670712, now seen corresponding path program 16 times [2024-06-20 15:16:01,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:01,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905285697] [2024-06-20 15:16:01,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:01,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:01,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:01,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:01,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905285697] [2024-06-20 15:16:01,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905285697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:01,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:01,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:01,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122682317] [2024-06-20 15:16:01,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:01,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:01,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:01,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:01,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:01,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:01,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 499 transitions, 8030 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) [2024-06-20 15:16:01,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:01,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:01,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:02,101 INFO L124 PetriNetUnfolderBase]: 2599/4352 cut-off events. [2024-06-20 15:16:02,102 INFO L125 PetriNetUnfolderBase]: For 558263/558263 co-relation queries the response was YES. [2024-06-20 15:16:02,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36275 conditions, 4352 events. 2599/4352 cut-off events. For 558263/558263 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 27737 event pairs, 482 based on Foata normal form. 1/4344 useless extension candidates. Maximal degree in co-relation 36111. Up to 3668 conditions per place. [2024-06-20 15:16:02,167 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 363 selfloop transitions, 162 changer transitions 0/532 dead transitions. [2024-06-20 15:16:02,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 532 transitions, 9352 flow [2024-06-20 15:16:02,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:16:02,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:16:02,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 288 transitions. [2024-06-20 15:16:02,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5538461538461539 [2024-06-20 15:16:02,168 INFO L175 Difference]: Start difference. First operand has 373 places, 499 transitions, 8030 flow. Second operand 13 states and 288 transitions. [2024-06-20 15:16:02,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 532 transitions, 9352 flow [2024-06-20 15:16:04,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 532 transitions, 9016 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-20 15:16:04,308 INFO L231 Difference]: Finished difference. Result has 377 places, 499 transitions, 8036 flow [2024-06-20 15:16:04,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7698, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8036, PETRI_PLACES=377, PETRI_TRANSITIONS=499} [2024-06-20 15:16:04,308 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 336 predicate places. [2024-06-20 15:16:04,308 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 499 transitions, 8036 flow [2024-06-20 15:16:04,309 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) [2024-06-20 15:16:04,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:04,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:04,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 15:16:04,309 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)] === [2024-06-20 15:16:04,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:04,309 INFO L85 PathProgramCache]: Analyzing trace with hash -265173560, now seen corresponding path program 14 times [2024-06-20 15:16:04,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:04,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363368446] [2024-06-20 15:16:04,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:04,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:04,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:04,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363368446] [2024-06-20 15:16:04,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363368446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:04,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:04,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:04,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000888698] [2024-06-20 15:16:04,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:04,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:04,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:04,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:04,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:04,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:04,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 499 transitions, 8036 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) [2024-06-20 15:16:04,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:04,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:04,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:05,240 INFO L124 PetriNetUnfolderBase]: 2593/4339 cut-off events. [2024-06-20 15:16:05,240 INFO L125 PetriNetUnfolderBase]: For 543029/543029 co-relation queries the response was YES. [2024-06-20 15:16:05,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35923 conditions, 4339 events. 2593/4339 cut-off events. For 543029/543029 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 27668 event pairs, 502 based on Foata normal form. 2/4332 useless extension candidates. Maximal degree in co-relation 35759. Up to 3360 conditions per place. [2024-06-20 15:16:05,302 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 247 selfloop transitions, 279 changer transitions 0/533 dead transitions. [2024-06-20 15:16:05,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 533 transitions, 10120 flow [2024-06-20 15:16:05,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:16:05,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:16:05,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-20 15:16:05,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6175 [2024-06-20 15:16:05,304 INFO L175 Difference]: Start difference. First operand has 377 places, 499 transitions, 8036 flow. Second operand 10 states and 247 transitions. [2024-06-20 15:16:05,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 533 transitions, 10120 flow [2024-06-20 15:16:07,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 533 transitions, 9740 flow, removed 28 selfloop flow, removed 13 redundant places. [2024-06-20 15:16:07,743 INFO L231 Difference]: Finished difference. Result has 374 places, 499 transitions, 8253 flow [2024-06-20 15:16:07,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7676, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8253, PETRI_PLACES=374, PETRI_TRANSITIONS=499} [2024-06-20 15:16:07,743 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 333 predicate places. [2024-06-20 15:16:07,743 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 499 transitions, 8253 flow [2024-06-20 15:16:07,743 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) [2024-06-20 15:16:07,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:07,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:07,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 15:16:07,744 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)] === [2024-06-20 15:16:07,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:07,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1223311334, now seen corresponding path program 9 times [2024-06-20 15:16:07,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:07,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002577675] [2024-06-20 15:16:07,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:07,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:07,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:07,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002577675] [2024-06-20 15:16:07,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002577675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:07,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:07,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:07,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421016278] [2024-06-20 15:16:07,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:07,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:07,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:07,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:07,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:07,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:07,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 499 transitions, 8253 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) [2024-06-20 15:16:07,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:07,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:07,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:08,691 INFO L124 PetriNetUnfolderBase]: 2590/4339 cut-off events. [2024-06-20 15:16:08,691 INFO L125 PetriNetUnfolderBase]: For 525255/525255 co-relation queries the response was YES. [2024-06-20 15:16:08,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35991 conditions, 4339 events. 2590/4339 cut-off events. For 525255/525255 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 27673 event pairs, 498 based on Foata normal form. 1/4331 useless extension candidates. Maximal degree in co-relation 35827. Up to 3717 conditions per place. [2024-06-20 15:16:08,759 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 376 selfloop transitions, 135 changer transitions 0/518 dead transitions. [2024-06-20 15:16:08,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 518 transitions, 9697 flow [2024-06-20 15:16:08,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:08,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:08,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:16:08,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:16:08,761 INFO L175 Difference]: Start difference. First operand has 374 places, 499 transitions, 8253 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:16:08,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 518 transitions, 9697 flow [2024-06-20 15:16:10,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 518 transitions, 9003 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-06-20 15:16:10,838 INFO L231 Difference]: Finished difference. Result has 368 places, 499 transitions, 7859 flow [2024-06-20 15:16:10,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7571, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7859, PETRI_PLACES=368, PETRI_TRANSITIONS=499} [2024-06-20 15:16:10,839 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 327 predicate places. [2024-06-20 15:16:10,839 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 499 transitions, 7859 flow [2024-06-20 15:16:10,839 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) [2024-06-20 15:16:10,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:10,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:10,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 15:16:10,840 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)] === [2024-06-20 15:16:10,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:10,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2034133796, now seen corresponding path program 15 times [2024-06-20 15:16:10,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:10,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902440293] [2024-06-20 15:16:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:10,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:10,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:10,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902440293] [2024-06-20 15:16:10,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902440293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:10,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:10,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:10,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629210222] [2024-06-20 15:16:10,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:10,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:10,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:10,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:10,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:10,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:10,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 499 transitions, 7859 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) [2024-06-20 15:16:10,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:10,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:10,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:11,814 INFO L124 PetriNetUnfolderBase]: 2584/4329 cut-off events. [2024-06-20 15:16:11,814 INFO L125 PetriNetUnfolderBase]: For 498079/498079 co-relation queries the response was YES. [2024-06-20 15:16:11,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35084 conditions, 4329 events. 2584/4329 cut-off events. For 498079/498079 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 27613 event pairs, 502 based on Foata normal form. 2/4322 useless extension candidates. Maximal degree in co-relation 34922. Up to 3353 conditions per place. [2024-06-20 15:16:11,876 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 240 selfloop transitions, 286 changer transitions 0/533 dead transitions. [2024-06-20 15:16:11,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 533 transitions, 9729 flow [2024-06-20 15:16:11,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:16:11,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:16:11,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 263 transitions. [2024-06-20 15:16:11,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5977272727272728 [2024-06-20 15:16:11,878 INFO L175 Difference]: Start difference. First operand has 368 places, 499 transitions, 7859 flow. Second operand 11 states and 263 transitions. [2024-06-20 15:16:11,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 533 transitions, 9729 flow [2024-06-20 15:16:14,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 533 transitions, 9385 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-20 15:16:14,532 INFO L231 Difference]: Finished difference. Result has 370 places, 499 transitions, 8134 flow [2024-06-20 15:16:14,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7539, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8134, PETRI_PLACES=370, PETRI_TRANSITIONS=499} [2024-06-20 15:16:14,533 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 329 predicate places. [2024-06-20 15:16:14,533 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 499 transitions, 8134 flow [2024-06-20 15:16:14,533 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) [2024-06-20 15:16:14,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:14,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:14,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 15:16:14,533 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)] === [2024-06-20 15:16:14,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:14,534 INFO L85 PathProgramCache]: Analyzing trace with hash 685487588, now seen corresponding path program 16 times [2024-06-20 15:16:14,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:14,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202832820] [2024-06-20 15:16:14,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:14,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:14,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:14,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202832820] [2024-06-20 15:16:14,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202832820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:14,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:14,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:14,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102007593] [2024-06-20 15:16:14,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:14,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:14,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:14,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:14,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:14,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:14,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 499 transitions, 8134 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) [2024-06-20 15:16:14,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:14,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:14,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:15,521 INFO L124 PetriNetUnfolderBase]: 2623/4407 cut-off events. [2024-06-20 15:16:15,522 INFO L125 PetriNetUnfolderBase]: For 492812/492818 co-relation queries the response was YES. [2024-06-20 15:16:15,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36042 conditions, 4407 events. 2623/4407 cut-off events. For 492812/492818 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 28313 event pairs, 467 based on Foata normal form. 6/4410 useless extension candidates. Maximal degree in co-relation 35882. Up to 3764 conditions per place. [2024-06-20 15:16:15,588 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 435 selfloop transitions, 105 changer transitions 0/547 dead transitions. [2024-06-20 15:16:15,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 547 transitions, 10219 flow [2024-06-20 15:16:15,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:15,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:15,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 15:16:15,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:16:15,589 INFO L175 Difference]: Start difference. First operand has 370 places, 499 transitions, 8134 flow. Second operand 7 states and 182 transitions. [2024-06-20 15:16:15,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 547 transitions, 10219 flow [2024-06-20 15:16:17,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 547 transitions, 9561 flow, removed 16 selfloop flow, removed 14 redundant places. [2024-06-20 15:16:17,635 INFO L231 Difference]: Finished difference. Result has 364 places, 513 transitions, 8075 flow [2024-06-20 15:16:17,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7538, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8075, PETRI_PLACES=364, PETRI_TRANSITIONS=513} [2024-06-20 15:16:17,635 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-20 15:16:17,635 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 513 transitions, 8075 flow [2024-06-20 15:16:17,635 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) [2024-06-20 15:16:17,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:17,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:17,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 15:16:17,636 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)] === [2024-06-20 15:16:17,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:17,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1892048806, now seen corresponding path program 17 times [2024-06-20 15:16:17,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:17,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256261610] [2024-06-20 15:16:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:17,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:17,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:17,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256261610] [2024-06-20 15:16:17,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256261610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:17,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:17,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:17,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465311183] [2024-06-20 15:16:17,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:17,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:17,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:17,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:17,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:17,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:17,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 513 transitions, 8075 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) [2024-06-20 15:16:17,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:17,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:17,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:18,695 INFO L124 PetriNetUnfolderBase]: 2625/4410 cut-off events. [2024-06-20 15:16:18,695 INFO L125 PetriNetUnfolderBase]: For 458228/458234 co-relation queries the response was YES. [2024-06-20 15:16:18,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35319 conditions, 4410 events. 2625/4410 cut-off events. For 458228/458234 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 28300 event pairs, 468 based on Foata normal form. 6/4413 useless extension candidates. Maximal degree in co-relation 35161. Up to 3831 conditions per place. [2024-06-20 15:16:18,750 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 457 selfloop transitions, 78 changer transitions 0/542 dead transitions. [2024-06-20 15:16:18,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 542 transitions, 9509 flow [2024-06-20 15:16:18,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:16:18,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:16:18,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-20 15:16:18,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:16:18,751 INFO L175 Difference]: Start difference. First operand has 364 places, 513 transitions, 8075 flow. Second operand 6 states and 156 transitions. [2024-06-20 15:16:18,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 542 transitions, 9509 flow [2024-06-20 15:16:20,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 542 transitions, 9419 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-20 15:16:20,215 INFO L231 Difference]: Finished difference. Result has 369 places, 519 transitions, 8325 flow [2024-06-20 15:16:20,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7987, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8325, PETRI_PLACES=369, PETRI_TRANSITIONS=519} [2024-06-20 15:16:20,215 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-20 15:16:20,216 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 519 transitions, 8325 flow [2024-06-20 15:16:20,216 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) [2024-06-20 15:16:20,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:20,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:20,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 15:16:20,216 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)] === [2024-06-20 15:16:20,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:20,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1892054386, now seen corresponding path program 18 times [2024-06-20 15:16:20,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:20,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145433135] [2024-06-20 15:16:20,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:20,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:20,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:20,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145433135] [2024-06-20 15:16:20,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145433135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:20,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:20,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:20,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496248643] [2024-06-20 15:16:20,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:20,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:20,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:20,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:20,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:20,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:20,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 519 transitions, 8325 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) [2024-06-20 15:16:20,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:20,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:20,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:21,181 INFO L124 PetriNetUnfolderBase]: 2619/4402 cut-off events. [2024-06-20 15:16:21,181 INFO L125 PetriNetUnfolderBase]: For 451658/451664 co-relation queries the response was YES. [2024-06-20 15:16:21,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35312 conditions, 4402 events. 2619/4402 cut-off events. For 451658/451664 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 28300 event pairs, 467 based on Foata normal form. 6/4405 useless extension candidates. Maximal degree in co-relation 35152. Up to 3825 conditions per place. [2024-06-20 15:16:21,246 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 459 selfloop transitions, 78 changer transitions 0/544 dead transitions. [2024-06-20 15:16:21,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 544 transitions, 9463 flow [2024-06-20 15:16:21,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:16:21,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:16:21,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-20 15:16:21,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-20 15:16:21,247 INFO L175 Difference]: Start difference. First operand has 369 places, 519 transitions, 8325 flow. Second operand 6 states and 158 transitions. [2024-06-20 15:16:21,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 544 transitions, 9463 flow [2024-06-20 15:16:23,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 544 transitions, 9289 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 15:16:23,065 INFO L231 Difference]: Finished difference. Result has 371 places, 519 transitions, 8321 flow [2024-06-20 15:16:23,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8151, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8321, PETRI_PLACES=371, PETRI_TRANSITIONS=519} [2024-06-20 15:16:23,065 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2024-06-20 15:16:23,065 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 519 transitions, 8321 flow [2024-06-20 15:16:23,065 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) [2024-06-20 15:16:23,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:23,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:23,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 15:16:23,066 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)] === [2024-06-20 15:16:23,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:23,066 INFO L85 PathProgramCache]: Analyzing trace with hash -338198396, now seen corresponding path program 10 times [2024-06-20 15:16:23,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:23,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892426839] [2024-06-20 15:16:23,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:23,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:23,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:23,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892426839] [2024-06-20 15:16:23,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892426839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:23,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:23,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:23,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057970618] [2024-06-20 15:16:23,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:23,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:23,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:23,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:23,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:23,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:23,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 519 transitions, 8321 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) [2024-06-20 15:16:23,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:23,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:23,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:24,128 INFO L124 PetriNetUnfolderBase]: 2613/4392 cut-off events. [2024-06-20 15:16:24,128 INFO L125 PetriNetUnfolderBase]: For 452954/452960 co-relation queries the response was YES. [2024-06-20 15:16:24,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35198 conditions, 4392 events. 2613/4392 cut-off events. For 452954/452960 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 28203 event pairs, 467 based on Foata normal form. 6/4395 useless extension candidates. Maximal degree in co-relation 35037. Up to 3835 conditions per place. [2024-06-20 15:16:24,183 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 452 selfloop transitions, 81 changer transitions 0/540 dead transitions. [2024-06-20 15:16:24,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 540 transitions, 9615 flow [2024-06-20 15:16:24,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:24,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:24,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 15:16:24,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-20 15:16:24,185 INFO L175 Difference]: Start difference. First operand has 371 places, 519 transitions, 8321 flow. Second operand 7 states and 169 transitions. [2024-06-20 15:16:24,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 540 transitions, 9615 flow [2024-06-20 15:16:26,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 540 transitions, 9497 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 15:16:26,239 INFO L231 Difference]: Finished difference. Result has 375 places, 519 transitions, 8374 flow [2024-06-20 15:16:26,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8203, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8374, PETRI_PLACES=375, PETRI_TRANSITIONS=519} [2024-06-20 15:16:26,240 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 334 predicate places. [2024-06-20 15:16:26,240 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 519 transitions, 8374 flow [2024-06-20 15:16:26,240 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) [2024-06-20 15:16:26,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:26,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:26,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 15:16:26,240 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)] === [2024-06-20 15:16:26,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:26,241 INFO L85 PathProgramCache]: Analyzing trace with hash 685498748, now seen corresponding path program 17 times [2024-06-20 15:16:26,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:26,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200035325] [2024-06-20 15:16:26,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:26,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:26,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:26,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:26,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200035325] [2024-06-20 15:16:26,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200035325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:26,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:26,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:26,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99617342] [2024-06-20 15:16:26,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:26,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:26,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:26,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:26,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:26,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:26,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 519 transitions, 8374 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) [2024-06-20 15:16:26,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:26,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:26,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:27,194 INFO L124 PetriNetUnfolderBase]: 2615/4399 cut-off events. [2024-06-20 15:16:27,194 INFO L125 PetriNetUnfolderBase]: For 458755/458761 co-relation queries the response was YES. [2024-06-20 15:16:27,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35261 conditions, 4399 events. 2615/4399 cut-off events. For 458755/458761 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 28317 event pairs, 468 based on Foata normal form. 6/4402 useless extension candidates. Maximal degree in co-relation 35099. Up to 3761 conditions per place. [2024-06-20 15:16:27,257 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 433 selfloop transitions, 106 changer transitions 0/546 dead transitions. [2024-06-20 15:16:27,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 546 transitions, 9953 flow [2024-06-20 15:16:27,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:27,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:27,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:16:27,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:16:27,258 INFO L175 Difference]: Start difference. First operand has 375 places, 519 transitions, 8374 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:16:27,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 546 transitions, 9953 flow [2024-06-20 15:16:29,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 546 transitions, 9725 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 15:16:29,086 INFO L231 Difference]: Finished difference. Result has 376 places, 522 transitions, 8442 flow [2024-06-20 15:16:29,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8156, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8442, PETRI_PLACES=376, PETRI_TRANSITIONS=522} [2024-06-20 15:16:29,086 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 335 predicate places. [2024-06-20 15:16:29,086 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 522 transitions, 8442 flow [2024-06-20 15:16:29,087 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) [2024-06-20 15:16:29,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:29,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:29,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 15:16:29,087 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)] === [2024-06-20 15:16:29,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:29,087 INFO L85 PathProgramCache]: Analyzing trace with hash 693260714, now seen corresponding path program 11 times [2024-06-20 15:16:29,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:29,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40263337] [2024-06-20 15:16:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:29,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:29,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:29,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40263337] [2024-06-20 15:16:29,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40263337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:29,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:29,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:29,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552775486] [2024-06-20 15:16:29,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:29,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:29,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:29,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:29,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:29,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:29,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 522 transitions, 8442 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) [2024-06-20 15:16:29,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:29,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:29,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:30,145 INFO L124 PetriNetUnfolderBase]: 2612/4393 cut-off events. [2024-06-20 15:16:30,146 INFO L125 PetriNetUnfolderBase]: For 459845/459851 co-relation queries the response was YES. [2024-06-20 15:16:30,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35274 conditions, 4393 events. 2612/4393 cut-off events. For 459845/459851 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 28225 event pairs, 467 based on Foata normal form. 5/4395 useless extension candidates. Maximal degree in co-relation 35111. Up to 3835 conditions per place. [2024-06-20 15:16:30,203 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 455 selfloop transitions, 80 changer transitions 0/542 dead transitions. [2024-06-20 15:16:30,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 542 transitions, 9562 flow [2024-06-20 15:16:30,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:30,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:30,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-20 15:16:30,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-20 15:16:30,204 INFO L175 Difference]: Start difference. First operand has 376 places, 522 transitions, 8442 flow. Second operand 7 states and 167 transitions. [2024-06-20 15:16:30,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 542 transitions, 9562 flow [2024-06-20 15:16:32,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 542 transitions, 9356 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-20 15:16:32,270 INFO L231 Difference]: Finished difference. Result has 379 places, 522 transitions, 8402 flow [2024-06-20 15:16:32,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8236, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8402, PETRI_PLACES=379, PETRI_TRANSITIONS=522} [2024-06-20 15:16:32,271 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-20 15:16:32,271 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 522 transitions, 8402 flow [2024-06-20 15:16:32,271 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) [2024-06-20 15:16:32,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:32,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:32,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 15:16:32,272 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)] === [2024-06-20 15:16:32,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:32,272 INFO L85 PathProgramCache]: Analyzing trace with hash -237657538, now seen corresponding path program 18 times [2024-06-20 15:16:32,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:32,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506477652] [2024-06-20 15:16:32,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:32,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:32,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:32,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506477652] [2024-06-20 15:16:32,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506477652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:32,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:32,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:32,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185462201] [2024-06-20 15:16:32,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:32,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:32,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:32,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:32,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:32,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:32,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 522 transitions, 8402 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) [2024-06-20 15:16:32,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:32,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:32,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:33,229 INFO L124 PetriNetUnfolderBase]: 2641/4441 cut-off events. [2024-06-20 15:16:33,229 INFO L125 PetriNetUnfolderBase]: For 472378/472384 co-relation queries the response was YES. [2024-06-20 15:16:33,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35817 conditions, 4441 events. 2641/4441 cut-off events. For 472378/472384 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 28581 event pairs, 467 based on Foata normal form. 5/4443 useless extension candidates. Maximal degree in co-relation 35654. Up to 3634 conditions per place. [2024-06-20 15:16:33,293 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 379 selfloop transitions, 173 changer transitions 0/559 dead transitions. [2024-06-20 15:16:33,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 559 transitions, 10548 flow [2024-06-20 15:16:33,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:33,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:33,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 15:16:33,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-20 15:16:33,294 INFO L175 Difference]: Start difference. First operand has 379 places, 522 transitions, 8402 flow. Second operand 8 states and 195 transitions. [2024-06-20 15:16:33,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 559 transitions, 10548 flow [2024-06-20 15:16:34,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 559 transitions, 10278 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 15:16:35,006 INFO L231 Difference]: Finished difference. Result has 381 places, 534 transitions, 8860 flow [2024-06-20 15:16:35,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8140, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8860, PETRI_PLACES=381, PETRI_TRANSITIONS=534} [2024-06-20 15:16:35,007 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 340 predicate places. [2024-06-20 15:16:35,007 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 534 transitions, 8860 flow [2024-06-20 15:16:35,007 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) [2024-06-20 15:16:35,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:35,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:35,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 15:16:35,007 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)] === [2024-06-20 15:16:35,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:35,008 INFO L85 PathProgramCache]: Analyzing trace with hash -244687408, now seen corresponding path program 19 times [2024-06-20 15:16:35,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:35,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25491252] [2024-06-20 15:16:35,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:35,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:35,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:35,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25491252] [2024-06-20 15:16:35,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25491252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:35,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:35,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:35,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052205010] [2024-06-20 15:16:35,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:35,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:35,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:35,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:35,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:35,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:35,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 534 transitions, 8860 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) [2024-06-20 15:16:35,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:35,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:35,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:36,111 INFO L124 PetriNetUnfolderBase]: 2651/4459 cut-off events. [2024-06-20 15:16:36,111 INFO L125 PetriNetUnfolderBase]: For 475056/475062 co-relation queries the response was YES. [2024-06-20 15:16:36,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36214 conditions, 4459 events. 2651/4459 cut-off events. For 475056/475062 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 28708 event pairs, 467 based on Foata normal form. 5/4461 useless extension candidates. Maximal degree in co-relation 36050. Up to 3883 conditions per place. [2024-06-20 15:16:36,176 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 466 selfloop transitions, 88 changer transitions 0/561 dead transitions. [2024-06-20 15:16:36,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 561 transitions, 10142 flow [2024-06-20 15:16:36,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:36,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:36,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:16:36,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-20 15:16:36,177 INFO L175 Difference]: Start difference. First operand has 381 places, 534 transitions, 8860 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:16:36,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 561 transitions, 10142 flow [2024-06-20 15:16:38,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 561 transitions, 9596 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-20 15:16:38,115 INFO L231 Difference]: Finished difference. Result has 384 places, 540 transitions, 8624 flow [2024-06-20 15:16:38,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8341, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8624, PETRI_PLACES=384, PETRI_TRANSITIONS=540} [2024-06-20 15:16:38,116 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 343 predicate places. [2024-06-20 15:16:38,116 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 540 transitions, 8624 flow [2024-06-20 15:16:38,116 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) [2024-06-20 15:16:38,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:38,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:38,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 15:16:38,117 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)] === [2024-06-20 15:16:38,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:38,117 INFO L85 PathProgramCache]: Analyzing trace with hash -244894984, now seen corresponding path program 19 times [2024-06-20 15:16:38,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:38,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061595151] [2024-06-20 15:16:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:38,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:38,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:38,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061595151] [2024-06-20 15:16:38,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061595151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:38,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:38,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:38,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034978262] [2024-06-20 15:16:38,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:38,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:38,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:38,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:38,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:38,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:38,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 540 transitions, 8624 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) [2024-06-20 15:16:38,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:38,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:38,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:39,142 INFO L124 PetriNetUnfolderBase]: 2653/4464 cut-off events. [2024-06-20 15:16:39,142 INFO L125 PetriNetUnfolderBase]: For 480720/480726 co-relation queries the response was YES. [2024-06-20 15:16:39,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35910 conditions, 4464 events. 2653/4464 cut-off events. For 480720/480726 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 28845 event pairs, 467 based on Foata normal form. 6/4467 useless extension candidates. Maximal degree in co-relation 35745. Up to 3796 conditions per place. [2024-06-20 15:16:39,208 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 444 selfloop transitions, 126 changer transitions 0/577 dead transitions. [2024-06-20 15:16:39,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 577 transitions, 10091 flow [2024-06-20 15:16:39,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:39,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:39,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-20 15:16:39,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.640625 [2024-06-20 15:16:39,210 INFO L175 Difference]: Start difference. First operand has 384 places, 540 transitions, 8624 flow. Second operand 8 states and 205 transitions. [2024-06-20 15:16:39,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 577 transitions, 10091 flow [2024-06-20 15:16:41,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 577 transitions, 9885 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 15:16:41,626 INFO L231 Difference]: Finished difference. Result has 387 places, 543 transitions, 8755 flow [2024-06-20 15:16:41,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8418, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8755, PETRI_PLACES=387, PETRI_TRANSITIONS=543} [2024-06-20 15:16:41,636 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 346 predicate places. [2024-06-20 15:16:41,637 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 543 transitions, 8755 flow [2024-06-20 15:16:41,637 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) [2024-06-20 15:16:41,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:41,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:41,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 15:16:41,637 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)] === [2024-06-20 15:16:41,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:41,638 INFO L85 PathProgramCache]: Analyzing trace with hash -244889218, now seen corresponding path program 20 times [2024-06-20 15:16:41,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:41,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457483115] [2024-06-20 15:16:41,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:41,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:41,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:41,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:41,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457483115] [2024-06-20 15:16:41,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457483115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:41,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:41,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:41,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097907147] [2024-06-20 15:16:41,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:41,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:41,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:41,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:41,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:41,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:41,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 543 transitions, 8755 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) [2024-06-20 15:16:41,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:41,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:41,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:42,689 INFO L124 PetriNetUnfolderBase]: 2650/4460 cut-off events. [2024-06-20 15:16:42,689 INFO L125 PetriNetUnfolderBase]: For 481787/481793 co-relation queries the response was YES. [2024-06-20 15:16:42,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36039 conditions, 4460 events. 2650/4460 cut-off events. For 481787/481793 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 28796 event pairs, 468 based on Foata normal form. 5/4462 useless extension candidates. Maximal degree in co-relation 35873. Up to 3860 conditions per place. [2024-06-20 15:16:42,750 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 462 selfloop transitions, 104 changer transitions 0/573 dead transitions. [2024-06-20 15:16:42,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 573 transitions, 10145 flow [2024-06-20 15:16:42,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:16:42,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:16:42,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-20 15:16:42,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775 [2024-06-20 15:16:42,751 INFO L175 Difference]: Start difference. First operand has 387 places, 543 transitions, 8755 flow. Second operand 10 states and 231 transitions. [2024-06-20 15:16:42,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 573 transitions, 10145 flow [2024-06-20 15:16:44,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 573 transitions, 9869 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 15:16:44,610 INFO L231 Difference]: Finished difference. Result has 390 places, 543 transitions, 8697 flow [2024-06-20 15:16:44,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8483, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8697, PETRI_PLACES=390, PETRI_TRANSITIONS=543} [2024-06-20 15:16:44,610 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 349 predicate places. [2024-06-20 15:16:44,610 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 543 transitions, 8697 flow [2024-06-20 15:16:44,610 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) [2024-06-20 15:16:44,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:44,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:44,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 15:16:44,611 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)] === [2024-06-20 15:16:44,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:44,611 INFO L85 PathProgramCache]: Analyzing trace with hash -244900564, now seen corresponding path program 20 times [2024-06-20 15:16:44,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:44,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60261108] [2024-06-20 15:16:44,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:44,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:44,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:44,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60261108] [2024-06-20 15:16:44,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60261108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:44,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:44,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:44,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953511365] [2024-06-20 15:16:44,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:44,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:44,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:44,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:44,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:44,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:44,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 543 transitions, 8697 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) [2024-06-20 15:16:44,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:44,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:44,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:45,603 INFO L124 PetriNetUnfolderBase]: 2644/4452 cut-off events. [2024-06-20 15:16:45,603 INFO L125 PetriNetUnfolderBase]: For 467227/467233 co-relation queries the response was YES. [2024-06-20 15:16:45,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35544 conditions, 4452 events. 2644/4452 cut-off events. For 467227/467233 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 28769 event pairs, 468 based on Foata normal form. 6/4455 useless extension candidates. Maximal degree in co-relation 35379. Up to 3786 conditions per place. [2024-06-20 15:16:45,671 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 444 selfloop transitions, 117 changer transitions 0/568 dead transitions. [2024-06-20 15:16:45,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 568 transitions, 9883 flow [2024-06-20 15:16:45,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:16:45,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:16:45,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-20 15:16:45,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-20 15:16:45,675 INFO L175 Difference]: Start difference. First operand has 390 places, 543 transitions, 8697 flow. Second operand 6 states and 158 transitions. [2024-06-20 15:16:45,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 568 transitions, 9883 flow [2024-06-20 15:16:48,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 568 transitions, 9584 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-20 15:16:48,060 INFO L231 Difference]: Finished difference. Result has 387 places, 543 transitions, 8658 flow [2024-06-20 15:16:48,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8398, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8658, PETRI_PLACES=387, PETRI_TRANSITIONS=543} [2024-06-20 15:16:48,067 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 346 predicate places. [2024-06-20 15:16:48,068 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 543 transitions, 8658 flow [2024-06-20 15:16:48,068 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) [2024-06-20 15:16:48,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:48,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:48,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 15:16:48,070 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)] === [2024-06-20 15:16:48,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:48,071 INFO L85 PathProgramCache]: Analyzing trace with hash -248619448, now seen corresponding path program 21 times [2024-06-20 15:16:48,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:48,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14105604] [2024-06-20 15:16:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:48,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:48,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:48,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14105604] [2024-06-20 15:16:48,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14105604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:48,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:48,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:48,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688040210] [2024-06-20 15:16:48,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:48,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:48,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:48,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:48,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:48,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:48,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 543 transitions, 8658 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) [2024-06-20 15:16:48,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:48,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:48,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:49,076 INFO L124 PetriNetUnfolderBase]: 2649/4459 cut-off events. [2024-06-20 15:16:49,076 INFO L125 PetriNetUnfolderBase]: For 474256/474262 co-relation queries the response was YES. [2024-06-20 15:16:49,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35748 conditions, 4459 events. 2649/4459 cut-off events. For 474256/474262 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 28813 event pairs, 467 based on Foata normal form. 5/4461 useless extension candidates. Maximal degree in co-relation 35582. Up to 3641 conditions per place. [2024-06-20 15:16:49,138 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 379 selfloop transitions, 193 changer transitions 0/579 dead transitions. [2024-06-20 15:16:49,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 579 transitions, 10488 flow [2024-06-20 15:16:49,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:49,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:49,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:16:49,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.634375 [2024-06-20 15:16:49,139 INFO L175 Difference]: Start difference. First operand has 387 places, 543 transitions, 8658 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:16:49,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 579 transitions, 10488 flow [2024-06-20 15:16:51,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 579 transitions, 10218 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 15:16:51,082 INFO L231 Difference]: Finished difference. Result has 388 places, 546 transitions, 8844 flow [2024-06-20 15:16:51,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8400, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8844, PETRI_PLACES=388, PETRI_TRANSITIONS=546} [2024-06-20 15:16:51,083 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 347 predicate places. [2024-06-20 15:16:51,083 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 546 transitions, 8844 flow [2024-06-20 15:16:51,083 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) [2024-06-20 15:16:51,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:51,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:51,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 15:16:51,083 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)] === [2024-06-20 15:16:51,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:51,084 INFO L85 PathProgramCache]: Analyzing trace with hash -859690224, now seen corresponding path program 22 times [2024-06-20 15:16:51,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:51,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436403406] [2024-06-20 15:16:51,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:51,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:51,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:51,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436403406] [2024-06-20 15:16:51,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436403406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:51,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:51,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:51,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95183270] [2024-06-20 15:16:51,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:51,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:51,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:51,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:51,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:51,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:51,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 546 transitions, 8844 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) [2024-06-20 15:16:51,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:51,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:51,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:52,054 INFO L124 PetriNetUnfolderBase]: 2646/4455 cut-off events. [2024-06-20 15:16:52,054 INFO L125 PetriNetUnfolderBase]: For 460632/460638 co-relation queries the response was YES. [2024-06-20 15:16:52,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35678 conditions, 4455 events. 2646/4455 cut-off events. For 460632/460638 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 28740 event pairs, 467 based on Foata normal form. 5/4457 useless extension candidates. Maximal degree in co-relation 35513. Up to 3856 conditions per place. [2024-06-20 15:16:52,119 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 463 selfloop transitions, 103 changer transitions 0/573 dead transitions. [2024-06-20 15:16:52,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 573 transitions, 10044 flow [2024-06-20 15:16:52,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:52,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:52,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:16:52,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-20 15:16:52,121 INFO L175 Difference]: Start difference. First operand has 388 places, 546 transitions, 8844 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:16:52,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 573 transitions, 10044 flow [2024-06-20 15:16:53,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 573 transitions, 9430 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-20 15:16:53,782 INFO L231 Difference]: Finished difference. Result has 389 places, 546 transitions, 8442 flow [2024-06-20 15:16:53,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8230, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8442, PETRI_PLACES=389, PETRI_TRANSITIONS=546} [2024-06-20 15:16:53,782 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 348 predicate places. [2024-06-20 15:16:53,782 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 546 transitions, 8442 flow [2024-06-20 15:16:53,782 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) [2024-06-20 15:16:53,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:53,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:53,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 15:16:53,783 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)] === [2024-06-20 15:16:53,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:53,783 INFO L85 PathProgramCache]: Analyzing trace with hash -248619634, now seen corresponding path program 21 times [2024-06-20 15:16:53,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:53,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41650156] [2024-06-20 15:16:53,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:53,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:53,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:53,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:53,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41650156] [2024-06-20 15:16:53,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41650156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:53,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:53,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:53,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547736230] [2024-06-20 15:16:53,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:53,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:53,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:53,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:53,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:53,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:53,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 546 transitions, 8442 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) [2024-06-20 15:16:53,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:53,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:53,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:54,721 INFO L124 PetriNetUnfolderBase]: 2640/4447 cut-off events. [2024-06-20 15:16:54,721 INFO L125 PetriNetUnfolderBase]: For 462888/462894 co-relation queries the response was YES. [2024-06-20 15:16:54,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35123 conditions, 4447 events. 2640/4447 cut-off events. For 462888/462894 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 28712 event pairs, 467 based on Foata normal form. 6/4450 useless extension candidates. Maximal degree in co-relation 34957. Up to 3751 conditions per place. [2024-06-20 15:16:54,786 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 439 selfloop transitions, 129 changer transitions 0/575 dead transitions. [2024-06-20 15:16:54,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 575 transitions, 9652 flow [2024-06-20 15:16:54,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:54,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:54,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 15:16:54,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464285714285715 [2024-06-20 15:16:54,787 INFO L175 Difference]: Start difference. First operand has 389 places, 546 transitions, 8442 flow. Second operand 7 states and 181 transitions. [2024-06-20 15:16:54,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 575 transitions, 9652 flow [2024-06-20 15:16:56,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 575 transitions, 9382 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 15:16:56,486 INFO L231 Difference]: Finished difference. Result has 388 places, 546 transitions, 8444 flow [2024-06-20 15:16:56,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8172, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8444, PETRI_PLACES=388, PETRI_TRANSITIONS=546} [2024-06-20 15:16:56,486 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 347 predicate places. [2024-06-20 15:16:56,486 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 546 transitions, 8444 flow [2024-06-20 15:16:56,487 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) [2024-06-20 15:16:56,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:56,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:56,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 15:16:56,487 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)] === [2024-06-20 15:16:56,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:56,487 INFO L85 PathProgramCache]: Analyzing trace with hash -863172144, now seen corresponding path program 23 times [2024-06-20 15:16:56,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:56,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351673916] [2024-06-20 15:16:56,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:56,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:56,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:56,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:56,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351673916] [2024-06-20 15:16:56,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351673916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:56,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:56,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:56,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748082416] [2024-06-20 15:16:56,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:56,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:56,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:56,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:56,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:56,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:56,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 546 transitions, 8444 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) [2024-06-20 15:16:56,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:56,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:56,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:57,419 INFO L124 PetriNetUnfolderBase]: 2637/4443 cut-off events. [2024-06-20 15:16:57,420 INFO L125 PetriNetUnfolderBase]: For 463664/463670 co-relation queries the response was YES. [2024-06-20 15:16:57,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35178 conditions, 4443 events. 2637/4443 cut-off events. For 463664/463670 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 28670 event pairs, 467 based on Foata normal form. 5/4445 useless extension candidates. Maximal degree in co-relation 35011. Up to 3632 conditions per place. [2024-06-20 15:16:57,483 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 376 selfloop transitions, 192 changer transitions 0/575 dead transitions. [2024-06-20 15:16:57,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 575 transitions, 10024 flow [2024-06-20 15:16:57,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:57,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:57,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 15:16:57,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.621875 [2024-06-20 15:16:57,485 INFO L175 Difference]: Start difference. First operand has 388 places, 546 transitions, 8444 flow. Second operand 8 states and 199 transitions. [2024-06-20 15:16:57,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 575 transitions, 10024 flow [2024-06-20 15:16:59,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 575 transitions, 9638 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-20 15:16:59,288 INFO L231 Difference]: Finished difference. Result has 389 places, 546 transitions, 8452 flow [2024-06-20 15:16:59,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8062, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8452, PETRI_PLACES=389, PETRI_TRANSITIONS=546} [2024-06-20 15:16:59,288 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 348 predicate places. [2024-06-20 15:16:59,288 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 546 transitions, 8452 flow [2024-06-20 15:16:59,289 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) [2024-06-20 15:16:59,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:59,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:59,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 15:16:59,289 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)] === [2024-06-20 15:16:59,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:59,289 INFO L85 PathProgramCache]: Analyzing trace with hash -863175120, now seen corresponding path program 7 times [2024-06-20 15:16:59,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:59,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773913061] [2024-06-20 15:16:59,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:59,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:59,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:59,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773913061] [2024-06-20 15:16:59,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773913061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:59,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:59,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:59,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249794040] [2024-06-20 15:16:59,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:59,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:59,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:59,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:59,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:59,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:59,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 546 transitions, 8452 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) [2024-06-20 15:16:59,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:59,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:59,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:00,322 INFO L124 PetriNetUnfolderBase]: 2665/4490 cut-off events. [2024-06-20 15:17:00,323 INFO L125 PetriNetUnfolderBase]: For 493466/493466 co-relation queries the response was YES. [2024-06-20 15:17:00,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35554 conditions, 4490 events. 2665/4490 cut-off events. For 493466/493466 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 29017 event pairs, 467 based on Foata normal form. 8/4496 useless extension candidates. Maximal degree in co-relation 35387. Up to 3994 conditions per place. [2024-06-20 15:17:00,389 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 532 selfloop transitions, 35 changer transitions 0/574 dead transitions. [2024-06-20 15:17:00,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 574 transitions, 9704 flow [2024-06-20 15:17:00,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:17:00,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:17:00,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-20 15:17:00,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-20 15:17:00,391 INFO L175 Difference]: Start difference. First operand has 389 places, 546 transitions, 8452 flow. Second operand 7 states and 167 transitions. [2024-06-20 15:17:00,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 574 transitions, 9704 flow [2024-06-20 15:17:02,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 574 transitions, 9270 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 15:17:02,378 INFO L231 Difference]: Finished difference. Result has 388 places, 547 transitions, 8119 flow [2024-06-20 15:17:02,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8018, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8119, PETRI_PLACES=388, PETRI_TRANSITIONS=547} [2024-06-20 15:17:02,379 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 347 predicate places. [2024-06-20 15:17:02,379 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 547 transitions, 8119 flow [2024-06-20 15:17:02,379 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) [2024-06-20 15:17:02,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:02,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:02,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 15:17:02,379 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)] === [2024-06-20 15:17:02,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:02,380 INFO L85 PathProgramCache]: Analyzing trace with hash -248711704, now seen corresponding path program 8 times [2024-06-20 15:17:02,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:02,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876627652] [2024-06-20 15:17:02,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:02,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:02,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:02,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:02,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876627652] [2024-06-20 15:17:02,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876627652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:02,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:02,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:02,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602441346] [2024-06-20 15:17:02,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:02,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:02,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:02,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:02,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:02,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:02,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 547 transitions, 8119 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) [2024-06-20 15:17:02,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:02,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:02,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:03,389 INFO L124 PetriNetUnfolderBase]: 2685/4522 cut-off events. [2024-06-20 15:17:03,390 INFO L125 PetriNetUnfolderBase]: For 493018/493018 co-relation queries the response was YES. [2024-06-20 15:17:03,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35454 conditions, 4522 events. 2685/4522 cut-off events. For 493018/493018 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 29222 event pairs, 389 based on Foata normal form. 6/4526 useless extension candidates. Maximal degree in co-relation 35286. Up to 3884 conditions per place. [2024-06-20 15:17:03,459 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 534 selfloop transitions, 41 changer transitions 0/582 dead transitions. [2024-06-20 15:17:03,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 582 transitions, 9605 flow [2024-06-20 15:17:03,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:17:03,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:17:03,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:17:03,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-20 15:17:03,460 INFO L175 Difference]: Start difference. First operand has 388 places, 547 transitions, 8119 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:17:03,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 582 transitions, 9605 flow [2024-06-20 15:17:06,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 582 transitions, 9522 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 15:17:06,078 INFO L231 Difference]: Finished difference. Result has 390 places, 548 transitions, 8148 flow [2024-06-20 15:17:06,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8036, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8148, PETRI_PLACES=390, PETRI_TRANSITIONS=548} [2024-06-20 15:17:06,078 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 349 predicate places. [2024-06-20 15:17:06,079 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 548 transitions, 8148 flow [2024-06-20 15:17:06,079 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) [2024-06-20 15:17:06,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:06,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:06,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 15:17:06,079 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)] === [2024-06-20 15:17:06,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:06,079 INFO L85 PathProgramCache]: Analyzing trace with hash -815582308, now seen corresponding path program 9 times [2024-06-20 15:17:06,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:06,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832542453] [2024-06-20 15:17:06,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:06,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:06,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:06,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:06,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832542453] [2024-06-20 15:17:06,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832542453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:06,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:06,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:06,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942726902] [2024-06-20 15:17:06,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:06,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:06,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:06,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:06,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:06,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:06,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 548 transitions, 8148 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) [2024-06-20 15:17:06,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:06,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:06,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:07,091 INFO L124 PetriNetUnfolderBase]: 2667/4496 cut-off events. [2024-06-20 15:17:07,091 INFO L125 PetriNetUnfolderBase]: For 475494/475494 co-relation queries the response was YES. [2024-06-20 15:17:07,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34568 conditions, 4496 events. 2667/4496 cut-off events. For 475494/475494 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 29085 event pairs, 463 based on Foata normal form. 8/4502 useless extension candidates. Maximal degree in co-relation 34399. Up to 4000 conditions per place. [2024-06-20 15:17:07,160 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 529 selfloop transitions, 33 changer transitions 0/569 dead transitions. [2024-06-20 15:17:07,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 569 transitions, 9350 flow [2024-06-20 15:17:07,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:17:07,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:17:07,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-20 15:17:07,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:17:07,162 INFO L175 Difference]: Start difference. First operand has 390 places, 548 transitions, 8148 flow. Second operand 7 states and 161 transitions. [2024-06-20 15:17:07,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 569 transitions, 9350 flow [2024-06-20 15:17:09,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 569 transitions, 9225 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 15:17:09,675 INFO L231 Difference]: Finished difference. Result has 392 places, 548 transitions, 8094 flow [2024-06-20 15:17:09,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8023, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8094, PETRI_PLACES=392, PETRI_TRANSITIONS=548} [2024-06-20 15:17:09,676 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 351 predicate places. [2024-06-20 15:17:09,676 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 548 transitions, 8094 flow [2024-06-20 15:17:09,676 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) [2024-06-20 15:17:09,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:09,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:09,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 15:17:09,676 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)] === [2024-06-20 15:17:09,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:09,677 INFO L85 PathProgramCache]: Analyzing trace with hash -887571202, now seen corresponding path program 2 times [2024-06-20 15:17:09,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:09,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556114502] [2024-06-20 15:17:09,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:09,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:09,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:09,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556114502] [2024-06-20 15:17:09,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556114502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:09,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:09,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:09,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112565924] [2024-06-20 15:17:09,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:09,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:09,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:09,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:09,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:09,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:09,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 548 transitions, 8094 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) [2024-06-20 15:17:09,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:09,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:09,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:10,743 INFO L124 PetriNetUnfolderBase]: 2687/4532 cut-off events. [2024-06-20 15:17:10,743 INFO L125 PetriNetUnfolderBase]: For 473589/473589 co-relation queries the response was YES. [2024-06-20 15:17:10,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34572 conditions, 4532 events. 2687/4532 cut-off events. For 473589/473589 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 29319 event pairs, 381 based on Foata normal form. 6/4536 useless extension candidates. Maximal degree in co-relation 34402. Up to 3975 conditions per place. [2024-06-20 15:17:10,815 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 539 selfloop transitions, 31 changer transitions 0/577 dead transitions. [2024-06-20 15:17:10,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 577 transitions, 9387 flow [2024-06-20 15:17:10,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:17:10,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:17:10,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 15:17:10,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-20 15:17:10,817 INFO L175 Difference]: Start difference. First operand has 392 places, 548 transitions, 8094 flow. Second operand 6 states and 149 transitions. [2024-06-20 15:17:10,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 577 transitions, 9387 flow [2024-06-20 15:17:13,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 577 transitions, 9301 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 15:17:13,669 INFO L231 Difference]: Finished difference. Result has 393 places, 551 transitions, 8137 flow [2024-06-20 15:17:13,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8008, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8137, PETRI_PLACES=393, PETRI_TRANSITIONS=551} [2024-06-20 15:17:13,670 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 352 predicate places. [2024-06-20 15:17:13,670 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 551 transitions, 8137 flow [2024-06-20 15:17:13,670 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) [2024-06-20 15:17:13,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:13,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:13,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 15:17:13,671 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)] === [2024-06-20 15:17:13,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:13,671 INFO L85 PathProgramCache]: Analyzing trace with hash -872839072, now seen corresponding path program 3 times [2024-06-20 15:17:13,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:13,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438242035] [2024-06-20 15:17:13,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:13,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:13,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:13,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438242035] [2024-06-20 15:17:13,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438242035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:13,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:13,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:13,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929353472] [2024-06-20 15:17:13,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:13,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:13,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:13,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:13,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:13,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:13,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 551 transitions, 8137 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) [2024-06-20 15:17:13,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:13,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:13,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:14,663 INFO L124 PetriNetUnfolderBase]: 2707/4568 cut-off events. [2024-06-20 15:17:14,664 INFO L125 PetriNetUnfolderBase]: For 483302/483302 co-relation queries the response was YES. [2024-06-20 15:17:14,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34913 conditions, 4568 events. 2707/4568 cut-off events. For 483302/483302 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 29653 event pairs, 385 based on Foata normal form. 6/4572 useless extension candidates. Maximal degree in co-relation 34741. Up to 3969 conditions per place. [2024-06-20 15:17:14,733 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 542 selfloop transitions, 35 changer transitions 0/584 dead transitions. [2024-06-20 15:17:14,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 584 transitions, 9476 flow [2024-06-20 15:17:14,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:17:14,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:17:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:17:14,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:17:14,734 INFO L175 Difference]: Start difference. First operand has 393 places, 551 transitions, 8137 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:17:14,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 584 transitions, 9476 flow [2024-06-20 15:17:17,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 584 transitions, 9432 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-20 15:17:17,157 INFO L231 Difference]: Finished difference. Result has 400 places, 556 transitions, 8266 flow [2024-06-20 15:17:17,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8093, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8266, PETRI_PLACES=400, PETRI_TRANSITIONS=556} [2024-06-20 15:17:17,158 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 359 predicate places. [2024-06-20 15:17:17,158 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 556 transitions, 8266 flow [2024-06-20 15:17:17,158 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) [2024-06-20 15:17:17,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:17,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:17,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 15:17:17,158 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)] === [2024-06-20 15:17:17,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:17,159 INFO L85 PathProgramCache]: Analyzing trace with hash -815182594, now seen corresponding path program 4 times [2024-06-20 15:17:17,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:17,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114971367] [2024-06-20 15:17:17,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:17,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:17,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:17,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114971367] [2024-06-20 15:17:17,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114971367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:17,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:17,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:17,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548586525] [2024-06-20 15:17:17,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:17,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:17,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:17,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:17,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:17,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:17,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 556 transitions, 8266 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) [2024-06-20 15:17:17,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:17,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:17,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:18,159 INFO L124 PetriNetUnfolderBase]: 2694/4549 cut-off events. [2024-06-20 15:17:18,159 INFO L125 PetriNetUnfolderBase]: For 464673/464673 co-relation queries the response was YES. [2024-06-20 15:17:18,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34507 conditions, 4549 events. 2694/4549 cut-off events. For 464673/464673 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 29562 event pairs, 462 based on Foata normal form. 6/4553 useless extension candidates. Maximal degree in co-relation 34331. Up to 3983 conditions per place. [2024-06-20 15:17:18,228 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 539 selfloop transitions, 36 changer transitions 0/582 dead transitions. [2024-06-20 15:17:18,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 582 transitions, 9546 flow [2024-06-20 15:17:18,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:17:18,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:17:18,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-20 15:17:18,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-20 15:17:18,229 INFO L175 Difference]: Start difference. First operand has 400 places, 556 transitions, 8266 flow. Second operand 7 states and 163 transitions. [2024-06-20 15:17:18,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 582 transitions, 9546 flow [2024-06-20 15:17:21,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 582 transitions, 9478 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-20 15:17:21,299 INFO L231 Difference]: Finished difference. Result has 406 places, 558 transitions, 8315 flow [2024-06-20 15:17:21,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8200, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8315, PETRI_PLACES=406, PETRI_TRANSITIONS=558} [2024-06-20 15:17:21,300 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 365 predicate places. [2024-06-20 15:17:21,300 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 558 transitions, 8315 flow [2024-06-20 15:17:21,300 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) [2024-06-20 15:17:21,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:21,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:21,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 15:17:21,300 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)] === [2024-06-20 15:17:21,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:21,300 INFO L85 PathProgramCache]: Analyzing trace with hash -243447268, now seen corresponding path program 1 times [2024-06-20 15:17:21,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:21,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956318322] [2024-06-20 15:17:21,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:21,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:21,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:21,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956318322] [2024-06-20 15:17:21,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956318322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:21,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:21,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:21,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473256835] [2024-06-20 15:17:21,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:21,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:21,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:21,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:21,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:21,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:21,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 558 transitions, 8315 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) [2024-06-20 15:17:21,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:21,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:21,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:22,328 INFO L124 PetriNetUnfolderBase]: 2780/4705 cut-off events. [2024-06-20 15:17:22,328 INFO L125 PetriNetUnfolderBase]: For 547746/547763 co-relation queries the response was YES. [2024-06-20 15:17:22,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36280 conditions, 4705 events. 2780/4705 cut-off events. For 547746/547763 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 30869 event pairs, 484 based on Foata normal form. 24/4722 useless extension candidates. Maximal degree in co-relation 36101. Up to 3629 conditions per place. [2024-06-20 15:17:22,401 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 428 selfloop transitions, 152 changer transitions 0/587 dead transitions. [2024-06-20 15:17:22,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 587 transitions, 9827 flow [2024-06-20 15:17:22,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:17:22,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:17:22,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 15:17:22,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:17:22,402 INFO L175 Difference]: Start difference. First operand has 406 places, 558 transitions, 8315 flow. Second operand 7 states and 170 transitions. [2024-06-20 15:17:22,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 587 transitions, 9827 flow [2024-06-20 15:17:25,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 587 transitions, 9674 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 15:17:25,100 INFO L231 Difference]: Finished difference. Result has 407 places, 561 transitions, 8531 flow [2024-06-20 15:17:25,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8162, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8531, PETRI_PLACES=407, PETRI_TRANSITIONS=561} [2024-06-20 15:17:25,100 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 366 predicate places. [2024-06-20 15:17:25,100 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 561 transitions, 8531 flow [2024-06-20 15:17:25,100 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) [2024-06-20 15:17:25,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:25,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:25,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 15:17:25,101 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)] === [2024-06-20 15:17:25,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:25,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1497907884, now seen corresponding path program 2 times [2024-06-20 15:17:25,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:25,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248183172] [2024-06-20 15:17:25,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:25,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:25,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:25,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248183172] [2024-06-20 15:17:25,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248183172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:25,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:25,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:25,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316659096] [2024-06-20 15:17:25,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:25,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:25,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:25,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:25,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:25,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:25,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 561 transitions, 8531 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) [2024-06-20 15:17:25,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:25,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:25,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:26,366 INFO L124 PetriNetUnfolderBase]: 2912/4909 cut-off events. [2024-06-20 15:17:26,367 INFO L125 PetriNetUnfolderBase]: For 643264/643281 co-relation queries the response was YES. [2024-06-20 15:17:26,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39316 conditions, 4909 events. 2912/4909 cut-off events. For 643264/643281 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 32295 event pairs, 571 based on Foata normal form. 24/4926 useless extension candidates. Maximal degree in co-relation 39138. Up to 4055 conditions per place. [2024-06-20 15:17:26,437 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 436 selfloop transitions, 144 changer transitions 0/587 dead transitions. [2024-06-20 15:17:26,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 587 transitions, 10057 flow [2024-06-20 15:17:26,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:17:26,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:17:26,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-20 15:17:26,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-20 15:17:26,438 INFO L175 Difference]: Start difference. First operand has 407 places, 561 transitions, 8531 flow. Second operand 7 states and 167 transitions. [2024-06-20 15:17:26,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 587 transitions, 10057 flow [2024-06-20 15:17:29,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 587 transitions, 9772 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 15:17:29,745 INFO L231 Difference]: Finished difference. Result has 410 places, 565 transitions, 8623 flow [2024-06-20 15:17:29,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8250, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8623, PETRI_PLACES=410, PETRI_TRANSITIONS=565} [2024-06-20 15:17:29,745 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 369 predicate places. [2024-06-20 15:17:29,745 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 565 transitions, 8623 flow [2024-06-20 15:17:29,746 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) [2024-06-20 15:17:29,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:29,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:29,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 15:17:29,746 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)] === [2024-06-20 15:17:29,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:29,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1498055754, now seen corresponding path program 3 times [2024-06-20 15:17:29,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:29,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779752680] [2024-06-20 15:17:29,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:29,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:29,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:29,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779752680] [2024-06-20 15:17:29,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779752680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:29,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:29,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:29,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409148133] [2024-06-20 15:17:29,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:29,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:29,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:29,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:29,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:29,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:29,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 565 transitions, 8623 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) [2024-06-20 15:17:29,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:29,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:29,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:30,875 INFO L124 PetriNetUnfolderBase]: 2876/4857 cut-off events. [2024-06-20 15:17:30,875 INFO L125 PetriNetUnfolderBase]: For 593838/593855 co-relation queries the response was YES. [2024-06-20 15:17:30,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37536 conditions, 4857 events. 2876/4857 cut-off events. For 593838/593855 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 31974 event pairs, 567 based on Foata normal form. 28/4878 useless extension candidates. Maximal degree in co-relation 37357. Up to 4099 conditions per place. [2024-06-20 15:17:30,962 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 436 selfloop transitions, 140 changer transitions 0/583 dead transitions. [2024-06-20 15:17:30,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 583 transitions, 9841 flow [2024-06-20 15:17:30,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:17:30,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:17:30,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-20 15:17:30,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-20 15:17:30,963 INFO L175 Difference]: Start difference. First operand has 410 places, 565 transitions, 8623 flow. Second operand 7 states and 163 transitions. [2024-06-20 15:17:30,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 583 transitions, 9841 flow [2024-06-20 15:17:34,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 583 transitions, 9633 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-20 15:17:34,041 INFO L231 Difference]: Finished difference. Result has 414 places, 565 transitions, 8701 flow [2024-06-20 15:17:34,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8415, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8701, PETRI_PLACES=414, PETRI_TRANSITIONS=565} [2024-06-20 15:17:34,042 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 373 predicate places. [2024-06-20 15:17:34,042 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 565 transitions, 8701 flow [2024-06-20 15:17:34,042 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) [2024-06-20 15:17:34,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:34,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:34,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 15:17:34,042 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)] === [2024-06-20 15:17:34,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:34,043 INFO L85 PathProgramCache]: Analyzing trace with hash 693269642, now seen corresponding path program 4 times [2024-06-20 15:17:34,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:34,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628252274] [2024-06-20 15:17:34,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:34,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:34,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:34,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628252274] [2024-06-20 15:17:34,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628252274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:34,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:34,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:34,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778201685] [2024-06-20 15:17:34,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:34,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:34,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:34,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:34,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:34,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:34,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 565 transitions, 8701 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) [2024-06-20 15:17:34,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:34,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:34,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:35,216 INFO L124 PetriNetUnfolderBase]: 2919/4925 cut-off events. [2024-06-20 15:17:35,216 INFO L125 PetriNetUnfolderBase]: For 588338/588344 co-relation queries the response was YES. [2024-06-20 15:17:35,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37943 conditions, 4925 events. 2919/4925 cut-off events. For 588338/588344 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 32436 event pairs, 529 based on Foata normal form. 20/4942 useless extension candidates. Maximal degree in co-relation 37762. Up to 4250 conditions per place. [2024-06-20 15:17:35,292 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 499 selfloop transitions, 85 changer transitions 0/591 dead transitions. [2024-06-20 15:17:35,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 591 transitions, 9993 flow [2024-06-20 15:17:35,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:17:35,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:17:35,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 15:17:35,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:17:35,293 INFO L175 Difference]: Start difference. First operand has 414 places, 565 transitions, 8701 flow. Second operand 7 states and 170 transitions. [2024-06-20 15:17:35,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 591 transitions, 9993 flow [2024-06-20 15:17:38,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 591 transitions, 9705 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:17:38,101 INFO L231 Difference]: Finished difference. Result has 415 places, 567 transitions, 8637 flow [2024-06-20 15:17:38,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8413, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8637, PETRI_PLACES=415, PETRI_TRANSITIONS=567} [2024-06-20 15:17:38,102 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 374 predicate places. [2024-06-20 15:17:38,102 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 567 transitions, 8637 flow [2024-06-20 15:17:38,102 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) [2024-06-20 15:17:38,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:38,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:38,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 15:17:38,102 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)] === [2024-06-20 15:17:38,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:38,103 INFO L85 PathProgramCache]: Analyzing trace with hash 693121772, now seen corresponding path program 5 times [2024-06-20 15:17:38,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:38,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19256740] [2024-06-20 15:17:38,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:38,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:38,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:38,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19256740] [2024-06-20 15:17:38,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19256740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:38,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:38,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:38,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085514114] [2024-06-20 15:17:38,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:38,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:38,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:38,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:38,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:38,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:38,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 567 transitions, 8637 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) [2024-06-20 15:17:38,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:38,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:38,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:39,210 INFO L124 PetriNetUnfolderBase]: 2972/5012 cut-off events. [2024-06-20 15:17:39,210 INFO L125 PetriNetUnfolderBase]: For 591468/591474 co-relation queries the response was YES. [2024-06-20 15:17:39,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38840 conditions, 5012 events. 2972/5012 cut-off events. For 591468/591474 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 33086 event pairs, 461 based on Foata normal form. 16/5025 useless extension candidates. Maximal degree in co-relation 38658. Up to 4108 conditions per place. [2024-06-20 15:17:39,287 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 499 selfloop transitions, 94 changer transitions 0/600 dead transitions. [2024-06-20 15:17:39,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 600 transitions, 10195 flow [2024-06-20 15:17:39,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:17:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:17:39,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:17:39,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-06-20 15:17:39,288 INFO L175 Difference]: Start difference. First operand has 415 places, 567 transitions, 8637 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:17:39,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 600 transitions, 10195 flow [2024-06-20 15:17:41,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 600 transitions, 10005 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 15:17:41,877 INFO L231 Difference]: Finished difference. Result has 417 places, 569 transitions, 8698 flow [2024-06-20 15:17:41,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8447, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8698, PETRI_PLACES=417, PETRI_TRANSITIONS=569} [2024-06-20 15:17:41,878 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 376 predicate places. [2024-06-20 15:17:41,878 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 569 transitions, 8698 flow [2024-06-20 15:17:41,878 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) [2024-06-20 15:17:41,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:41,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:41,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 15:17:41,879 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)] === [2024-06-20 15:17:41,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:41,879 INFO L85 PathProgramCache]: Analyzing trace with hash 698847224, now seen corresponding path program 1 times [2024-06-20 15:17:41,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:41,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530453313] [2024-06-20 15:17:41,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:41,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:41,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:41,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530453313] [2024-06-20 15:17:41,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530453313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:41,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:41,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:41,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129303127] [2024-06-20 15:17:41,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:41,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:41,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:41,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:41,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:42,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:42,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 569 transitions, 8698 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) [2024-06-20 15:17:42,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:42,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:42,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:42,955 INFO L124 PetriNetUnfolderBase]: 2939/4961 cut-off events. [2024-06-20 15:17:42,956 INFO L125 PetriNetUnfolderBase]: For 537583/537589 co-relation queries the response was YES. [2024-06-20 15:17:43,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37360 conditions, 4961 events. 2939/4961 cut-off events. For 537583/537589 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 32740 event pairs, 416 based on Foata normal form. 16/4974 useless extension candidates. Maximal degree in co-relation 37177. Up to 4013 conditions per place. [2024-06-20 15:17:43,034 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 517 selfloop transitions, 71 changer transitions 0/595 dead transitions. [2024-06-20 15:17:43,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 595 transitions, 9972 flow [2024-06-20 15:17:43,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:17:43,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:17:43,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-20 15:17:43,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-20 15:17:43,035 INFO L175 Difference]: Start difference. First operand has 417 places, 569 transitions, 8698 flow. Second operand 6 states and 155 transitions. [2024-06-20 15:17:43,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 595 transitions, 9972 flow [2024-06-20 15:17:45,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 595 transitions, 9793 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 15:17:45,776 INFO L231 Difference]: Finished difference. Result has 419 places, 569 transitions, 8668 flow [2024-06-20 15:17:45,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8519, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8668, PETRI_PLACES=419, PETRI_TRANSITIONS=569} [2024-06-20 15:17:45,788 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 378 predicate places. [2024-06-20 15:17:45,788 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 569 transitions, 8668 flow [2024-06-20 15:17:45,788 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) [2024-06-20 15:17:45,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:45,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:45,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 15:17:45,789 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)] === [2024-06-20 15:17:45,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:45,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1900713337, now seen corresponding path program 1 times [2024-06-20 15:17:45,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:45,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683897501] [2024-06-20 15:17:45,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:45,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:45,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:45,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683897501] [2024-06-20 15:17:45,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683897501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:45,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:45,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:45,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633437490] [2024-06-20 15:17:45,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:45,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:45,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:45,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:45,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:45,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:45,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 569 transitions, 8668 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) [2024-06-20 15:17:45,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:45,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:45,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:47,018 INFO L124 PetriNetUnfolderBase]: 3006/5039 cut-off events. [2024-06-20 15:17:47,019 INFO L125 PetriNetUnfolderBase]: For 547254/547254 co-relation queries the response was YES. [2024-06-20 15:17:47,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39035 conditions, 5039 events. 3006/5039 cut-off events. For 547254/547254 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 33038 event pairs, 480 based on Foata normal form. 2/5026 useless extension candidates. Maximal degree in co-relation 38851. Up to 3891 conditions per place. [2024-06-20 15:17:47,094 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 409 selfloop transitions, 197 changer transitions 0/613 dead transitions. [2024-06-20 15:17:47,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 613 transitions, 10570 flow [2024-06-20 15:17:47,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:47,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:47,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:17:47,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-20 15:17:47,095 INFO L175 Difference]: Start difference. First operand has 419 places, 569 transitions, 8668 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:17:47,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 613 transitions, 10570 flow [2024-06-20 15:17:51,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 613 transitions, 10381 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:17:51,268 INFO L231 Difference]: Finished difference. Result has 422 places, 575 transitions, 9032 flow [2024-06-20 15:17:51,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8479, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9032, PETRI_PLACES=422, PETRI_TRANSITIONS=575} [2024-06-20 15:17:51,269 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 381 predicate places. [2024-06-20 15:17:51,269 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 575 transitions, 9032 flow [2024-06-20 15:17:51,269 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) [2024-06-20 15:17:51,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:51,269 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] [2024-06-20 15:17:51,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 15:17:51,269 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)] === [2024-06-20 15:17:51,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:51,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1906427257, now seen corresponding path program 2 times [2024-06-20 15:17:51,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:51,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789532352] [2024-06-20 15:17:51,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:51,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:51,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:51,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:51,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789532352] [2024-06-20 15:17:51,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789532352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:51,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:51,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:51,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817180093] [2024-06-20 15:17:51,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:51,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:51,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:51,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:51,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:51,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:51,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 575 transitions, 9032 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) [2024-06-20 15:17:51,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:51,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:51,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:52,458 INFO L124 PetriNetUnfolderBase]: 3073/5140 cut-off events. [2024-06-20 15:17:52,459 INFO L125 PetriNetUnfolderBase]: For 615943/615943 co-relation queries the response was YES. [2024-06-20 15:17:52,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41111 conditions, 5140 events. 3073/5140 cut-off events. For 615943/615943 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 33769 event pairs, 472 based on Foata normal form. 2/5127 useless extension candidates. Maximal degree in co-relation 40926. Up to 3935 conditions per place. [2024-06-20 15:17:52,541 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 409 selfloop transitions, 201 changer transitions 0/617 dead transitions. [2024-06-20 15:17:52,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 617 transitions, 10930 flow [2024-06-20 15:17:52,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:52,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:52,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:17:52,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-20 15:17:52,542 INFO L175 Difference]: Start difference. First operand has 422 places, 575 transitions, 9032 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:17:52,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 617 transitions, 10930 flow [2024-06-20 15:17:55,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 617 transitions, 10616 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-20 15:17:55,697 INFO L231 Difference]: Finished difference. Result has 427 places, 579 transitions, 9233 flow [2024-06-20 15:17:55,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8744, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9233, PETRI_PLACES=427, PETRI_TRANSITIONS=579} [2024-06-20 15:17:55,697 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-20 15:17:55,697 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 579 transitions, 9233 flow [2024-06-20 15:17:55,698 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) [2024-06-20 15:17:55,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:55,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:55,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 15:17:55,698 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)] === [2024-06-20 15:17:55,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:55,698 INFO L85 PathProgramCache]: Analyzing trace with hash 351284601, now seen corresponding path program 3 times [2024-06-20 15:17:55,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:55,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612336273] [2024-06-20 15:17:55,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:55,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:55,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:55,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612336273] [2024-06-20 15:17:55,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612336273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:55,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:55,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:55,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544020937] [2024-06-20 15:17:55,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:55,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:55,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:55,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:55,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:55,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:55,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 579 transitions, 9233 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) [2024-06-20 15:17:55,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:55,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:55,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:56,909 INFO L124 PetriNetUnfolderBase]: 3094/5166 cut-off events. [2024-06-20 15:17:56,909 INFO L125 PetriNetUnfolderBase]: For 638281/638281 co-relation queries the response was YES. [2024-06-20 15:17:56,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41980 conditions, 5166 events. 3094/5166 cut-off events. For 638281/638281 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 33969 event pairs, 615 based on Foata normal form. 2/5148 useless extension candidates. Maximal degree in co-relation 41793. Up to 4357 conditions per place. [2024-06-20 15:17:56,996 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 422 selfloop transitions, 187 changer transitions 0/616 dead transitions. [2024-06-20 15:17:56,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 616 transitions, 10855 flow [2024-06-20 15:17:56,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:56,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:56,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:17:56,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-20 15:17:56,997 INFO L175 Difference]: Start difference. First operand has 427 places, 579 transitions, 9233 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:17:56,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 616 transitions, 10855 flow [2024-06-20 15:18:01,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 616 transitions, 10475 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-20 15:18:01,776 INFO L231 Difference]: Finished difference. Result has 432 places, 583 transitions, 9357 flow [2024-06-20 15:18:01,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8859, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9357, PETRI_PLACES=432, PETRI_TRANSITIONS=583} [2024-06-20 15:18:01,777 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 391 predicate places. [2024-06-20 15:18:01,777 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 583 transitions, 9357 flow [2024-06-20 15:18:01,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:01,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:01,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:01,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 15:18:01,778 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)] === [2024-06-20 15:18:01,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:01,778 INFO L85 PathProgramCache]: Analyzing trace with hash 359855481, now seen corresponding path program 4 times [2024-06-20 15:18:01,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:01,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411634045] [2024-06-20 15:18:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:01,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:01,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:01,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411634045] [2024-06-20 15:18:01,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411634045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:01,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:01,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:01,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459144706] [2024-06-20 15:18:01,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:01,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:01,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:01,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:01,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:01,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:01,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 583 transitions, 9357 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) [2024-06-20 15:18:01,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:01,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:01,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:03,046 INFO L124 PetriNetUnfolderBase]: 3102/5183 cut-off events. [2024-06-20 15:18:03,047 INFO L125 PetriNetUnfolderBase]: For 650381/650381 co-relation queries the response was YES. [2024-06-20 15:18:03,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42214 conditions, 5183 events. 3102/5183 cut-off events. For 650381/650381 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34137 event pairs, 622 based on Foata normal form. 2/5170 useless extension candidates. Maximal degree in co-relation 42025. Up to 4404 conditions per place. [2024-06-20 15:18:03,129 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 422 selfloop transitions, 184 changer transitions 0/613 dead transitions. [2024-06-20 15:18:03,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 613 transitions, 10697 flow [2024-06-20 15:18:03,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:03,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:03,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:18:03,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:18:03,130 INFO L175 Difference]: Start difference. First operand has 432 places, 583 transitions, 9357 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:18:03,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 613 transitions, 10697 flow [2024-06-20 15:18:06,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 613 transitions, 10257 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-20 15:18:06,156 INFO L231 Difference]: Finished difference. Result has 435 places, 585 transitions, 9352 flow [2024-06-20 15:18:06,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8937, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9352, PETRI_PLACES=435, PETRI_TRANSITIONS=585} [2024-06-20 15:18:06,157 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 394 predicate places. [2024-06-20 15:18:06,157 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 585 transitions, 9352 flow [2024-06-20 15:18:06,157 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) [2024-06-20 15:18:06,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:06,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:06,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 15:18:06,157 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)] === [2024-06-20 15:18:06,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:06,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1555965305, now seen corresponding path program 5 times [2024-06-20 15:18:06,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:06,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924114100] [2024-06-20 15:18:06,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:06,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:06,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:06,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924114100] [2024-06-20 15:18:06,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924114100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:06,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:06,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:06,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839358499] [2024-06-20 15:18:06,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:06,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:06,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:06,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:06,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:06,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:06,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 585 transitions, 9352 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) [2024-06-20 15:18:06,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:06,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:06,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:07,444 INFO L124 PetriNetUnfolderBase]: 3110/5195 cut-off events. [2024-06-20 15:18:07,444 INFO L125 PetriNetUnfolderBase]: For 660685/660685 co-relation queries the response was YES. [2024-06-20 15:18:07,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42247 conditions, 5195 events. 3110/5195 cut-off events. For 660685/660685 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 34218 event pairs, 622 based on Foata normal form. 2/5182 useless extension candidates. Maximal degree in co-relation 42057. Up to 4416 conditions per place. [2024-06-20 15:18:07,541 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 421 selfloop transitions, 184 changer transitions 0/612 dead transitions. [2024-06-20 15:18:07,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 612 transitions, 10666 flow [2024-06-20 15:18:07,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:07,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 15:18:07,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-20 15:18:07,543 INFO L175 Difference]: Start difference. First operand has 435 places, 585 transitions, 9352 flow. Second operand 8 states and 190 transitions. [2024-06-20 15:18:07,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 612 transitions, 10666 flow [2024-06-20 15:18:11,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 612 transitions, 10277 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 15:18:11,908 INFO L231 Difference]: Finished difference. Result has 437 places, 587 transitions, 9382 flow [2024-06-20 15:18:11,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8963, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9382, PETRI_PLACES=437, PETRI_TRANSITIONS=587} [2024-06-20 15:18:11,909 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 396 predicate places. [2024-06-20 15:18:11,909 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 587 transitions, 9382 flow [2024-06-20 15:18:11,909 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) [2024-06-20 15:18:11,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:11,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:11,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 15:18:11,909 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)] === [2024-06-20 15:18:11,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:11,910 INFO L85 PathProgramCache]: Analyzing trace with hash 134143571, now seen corresponding path program 6 times [2024-06-20 15:18:11,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:11,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086707277] [2024-06-20 15:18:11,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:11,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:12,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:12,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086707277] [2024-06-20 15:18:12,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086707277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:12,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:12,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:12,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730621745] [2024-06-20 15:18:12,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:12,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:12,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:12,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:12,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:12,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:12,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 587 transitions, 9382 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) [2024-06-20 15:18:12,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:12,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:12,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:13,126 INFO L124 PetriNetUnfolderBase]: 3177/5294 cut-off events. [2024-06-20 15:18:13,127 INFO L125 PetriNetUnfolderBase]: For 734399/734399 co-relation queries the response was YES. [2024-06-20 15:18:13,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44080 conditions, 5294 events. 3177/5294 cut-off events. For 734399/734399 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 34905 event pairs, 633 based on Foata normal form. 2/5279 useless extension candidates. Maximal degree in co-relation 43889. Up to 4436 conditions per place. [2024-06-20 15:18:13,213 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 423 selfloop transitions, 191 changer transitions 0/621 dead transitions. [2024-06-20 15:18:13,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 621 transitions, 11020 flow [2024-06-20 15:18:13,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:13,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:13,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 15:18:13,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-20 15:18:13,214 INFO L175 Difference]: Start difference. First operand has 437 places, 587 transitions, 9382 flow. Second operand 8 states and 195 transitions. [2024-06-20 15:18:13,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 621 transitions, 11020 flow [2024-06-20 15:18:16,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 621 transitions, 10627 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 15:18:16,872 INFO L231 Difference]: Finished difference. Result has 440 places, 591 transitions, 9488 flow [2024-06-20 15:18:16,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8989, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9488, PETRI_PLACES=440, PETRI_TRANSITIONS=591} [2024-06-20 15:18:16,873 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 399 predicate places. [2024-06-20 15:18:16,873 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 591 transitions, 9488 flow [2024-06-20 15:18:16,873 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) [2024-06-20 15:18:16,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:16,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:16,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 15:18:16,873 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)] === [2024-06-20 15:18:16,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:16,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1656351296, now seen corresponding path program 1 times [2024-06-20 15:18:16,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:16,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091732197] [2024-06-20 15:18:16,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:16,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:16,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:16,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091732197] [2024-06-20 15:18:16,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091732197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:16,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:16,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:16,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693940198] [2024-06-20 15:18:16,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:16,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:16,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:16,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:16,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:17,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:17,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 591 transitions, 9488 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) [2024-06-20 15:18:17,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:17,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:17,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:18,059 INFO L124 PetriNetUnfolderBase]: 3182/5331 cut-off events. [2024-06-20 15:18:18,060 INFO L125 PetriNetUnfolderBase]: For 743776/743787 co-relation queries the response was YES. [2024-06-20 15:18:18,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44419 conditions, 5331 events. 3182/5331 cut-off events. For 743776/743787 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 35376 event pairs, 662 based on Foata normal form. 9/5332 useless extension candidates. Maximal degree in co-relation 44226. Up to 4153 conditions per place. [2024-06-20 15:18:18,146 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 293 selfloop transitions, 320 changer transitions 0/620 dead transitions. [2024-06-20 15:18:18,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 620 transitions, 11290 flow [2024-06-20 15:18:18,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:18,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:18,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:18:18,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:18:18,147 INFO L175 Difference]: Start difference. First operand has 440 places, 591 transitions, 9488 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:18:18,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 620 transitions, 11290 flow [2024-06-20 15:18:22,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 620 transitions, 10899 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 15:18:22,464 INFO L231 Difference]: Finished difference. Result has 443 places, 594 transitions, 9811 flow [2024-06-20 15:18:22,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9097, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9811, PETRI_PLACES=443, PETRI_TRANSITIONS=594} [2024-06-20 15:18:22,465 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 402 predicate places. [2024-06-20 15:18:22,465 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 594 transitions, 9811 flow [2024-06-20 15:18:22,465 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) [2024-06-20 15:18:22,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:22,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:22,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 15:18:22,465 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)] === [2024-06-20 15:18:22,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:22,466 INFO L85 PathProgramCache]: Analyzing trace with hash 644887198, now seen corresponding path program 2 times [2024-06-20 15:18:22,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:22,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538835054] [2024-06-20 15:18:22,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:22,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:22,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:22,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538835054] [2024-06-20 15:18:22,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538835054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:22,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:22,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:18:22,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951902438] [2024-06-20 15:18:22,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:22,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:18:22,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:22,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:18:22,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:18:22,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:22,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 594 transitions, 9811 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) [2024-06-20 15:18:22,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:22,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:22,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:23,843 INFO L124 PetriNetUnfolderBase]: 3187/5310 cut-off events. [2024-06-20 15:18:23,843 INFO L125 PetriNetUnfolderBase]: For 755086/755086 co-relation queries the response was YES. [2024-06-20 15:18:23,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44807 conditions, 5310 events. 3187/5310 cut-off events. For 755086/755086 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 35069 event pairs, 666 based on Foata normal form. 1/5296 useless extension candidates. Maximal degree in co-relation 44613. Up to 4159 conditions per place. [2024-06-20 15:18:23,921 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 264 selfloop transitions, 356 changer transitions 0/627 dead transitions. [2024-06-20 15:18:23,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 627 transitions, 11647 flow [2024-06-20 15:18:23,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:18:23,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:18:23,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-20 15:18:23,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:18:23,922 INFO L175 Difference]: Start difference. First operand has 443 places, 594 transitions, 9811 flow. Second operand 9 states and 216 transitions. [2024-06-20 15:18:23,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 627 transitions, 11647 flow [2024-06-20 15:18:29,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 627 transitions, 10618 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-20 15:18:29,865 INFO L231 Difference]: Finished difference. Result has 445 places, 597 transitions, 9574 flow [2024-06-20 15:18:29,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8814, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9574, PETRI_PLACES=445, PETRI_TRANSITIONS=597} [2024-06-20 15:18:29,866 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 404 predicate places. [2024-06-20 15:18:29,866 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 597 transitions, 9574 flow [2024-06-20 15:18:29,866 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) [2024-06-20 15:18:29,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:29,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:29,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 15:18:29,867 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)] === [2024-06-20 15:18:29,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:29,867 INFO L85 PathProgramCache]: Analyzing trace with hash 594555922, now seen corresponding path program 3 times [2024-06-20 15:18:29,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:29,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083216323] [2024-06-20 15:18:29,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:29,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:29,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:29,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083216323] [2024-06-20 15:18:29,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083216323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:29,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:29,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:18:29,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233529845] [2024-06-20 15:18:29,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:29,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:18:29,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:29,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:18:29,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:18:30,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:30,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 597 transitions, 9574 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) [2024-06-20 15:18:30,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:30,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:30,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:31,103 INFO L124 PetriNetUnfolderBase]: 3192/5320 cut-off events. [2024-06-20 15:18:31,103 INFO L125 PetriNetUnfolderBase]: For 764538/764538 co-relation queries the response was YES. [2024-06-20 15:18:31,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44668 conditions, 5320 events. 3192/5320 cut-off events. For 764538/764538 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 35135 event pairs, 665 based on Foata normal form. 1/5306 useless extension candidates. Maximal degree in co-relation 44475. Up to 4165 conditions per place. [2024-06-20 15:18:31,193 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 264 selfloop transitions, 359 changer transitions 0/630 dead transitions. [2024-06-20 15:18:31,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 630 transitions, 11394 flow [2024-06-20 15:18:31,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:18:31,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:18:31,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-20 15:18:31,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-20 15:18:31,195 INFO L175 Difference]: Start difference. First operand has 445 places, 597 transitions, 9574 flow. Second operand 9 states and 218 transitions. [2024-06-20 15:18:31,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 630 transitions, 11394 flow [2024-06-20 15:18:35,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 630 transitions, 10842 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 15:18:35,653 INFO L231 Difference]: Finished difference. Result has 448 places, 600 transitions, 9794 flow [2024-06-20 15:18:35,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9025, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9794, PETRI_PLACES=448, PETRI_TRANSITIONS=600} [2024-06-20 15:18:35,654 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 407 predicate places. [2024-06-20 15:18:35,654 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 600 transitions, 9794 flow [2024-06-20 15:18:35,654 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) [2024-06-20 15:18:35,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:35,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:35,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 15:18:35,655 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)] === [2024-06-20 15:18:35,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:35,655 INFO L85 PathProgramCache]: Analyzing trace with hash -980745198, now seen corresponding path program 4 times [2024-06-20 15:18:35,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:35,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461645862] [2024-06-20 15:18:35,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:35,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:35,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:35,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461645862] [2024-06-20 15:18:35,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461645862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:35,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:35,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:18:35,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132298471] [2024-06-20 15:18:35,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:35,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:18:35,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:35,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:18:35,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:18:35,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:35,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 600 transitions, 9794 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) [2024-06-20 15:18:35,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:35,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:35,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:36,903 INFO L124 PetriNetUnfolderBase]: 3213/5358 cut-off events. [2024-06-20 15:18:36,904 INFO L125 PetriNetUnfolderBase]: For 793080/793080 co-relation queries the response was YES. [2024-06-20 15:18:36,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45356 conditions, 5358 events. 3213/5358 cut-off events. For 793080/793080 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 35480 event pairs, 662 based on Foata normal form. 1/5344 useless extension candidates. Maximal degree in co-relation 45161. Up to 4189 conditions per place. [2024-06-20 15:18:36,996 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 269 selfloop transitions, 363 changer transitions 0/639 dead transitions. [2024-06-20 15:18:36,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 639 transitions, 12201 flow [2024-06-20 15:18:36,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:18:36,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:18:36,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-20 15:18:36,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925 [2024-06-20 15:18:36,997 INFO L175 Difference]: Start difference. First operand has 448 places, 600 transitions, 9794 flow. Second operand 10 states and 237 transitions. [2024-06-20 15:18:36,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 639 transitions, 12201 flow [2024-06-20 15:18:41,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 639 transitions, 11433 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 15:18:41,106 INFO L231 Difference]: Finished difference. Result has 451 places, 609 transitions, 9917 flow [2024-06-20 15:18:41,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9044, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9917, PETRI_PLACES=451, PETRI_TRANSITIONS=609} [2024-06-20 15:18:41,107 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 410 predicate places. [2024-06-20 15:18:41,107 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 609 transitions, 9917 flow [2024-06-20 15:18:41,107 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) [2024-06-20 15:18:41,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:41,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:41,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 15:18:41,107 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)] === [2024-06-20 15:18:41,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:41,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2059445246, now seen corresponding path program 5 times [2024-06-20 15:18:41,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:41,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084896473] [2024-06-20 15:18:41,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:41,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:41,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:41,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084896473] [2024-06-20 15:18:41,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084896473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:41,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:41,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:18:41,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042833055] [2024-06-20 15:18:41,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:41,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:18:41,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:41,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:18:41,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:18:41,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:41,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 609 transitions, 9917 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) [2024-06-20 15:18:41,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:41,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:41,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:42,355 INFO L124 PetriNetUnfolderBase]: 3226/5375 cut-off events. [2024-06-20 15:18:42,355 INFO L125 PetriNetUnfolderBase]: For 812971/812971 co-relation queries the response was YES. [2024-06-20 15:18:42,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45699 conditions, 5375 events. 3226/5375 cut-off events. For 812971/812971 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 35589 event pairs, 669 based on Foata normal form. 1/5361 useless extension candidates. Maximal degree in co-relation 45503. Up to 4204 conditions per place. [2024-06-20 15:18:42,444 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 265 selfloop transitions, 372 changer transitions 0/644 dead transitions. [2024-06-20 15:18:42,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 644 transitions, 12059 flow [2024-06-20 15:18:42,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:18:42,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:18:42,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 234 transitions. [2024-06-20 15:18:42,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.585 [2024-06-20 15:18:42,446 INFO L175 Difference]: Start difference. First operand has 451 places, 609 transitions, 9917 flow. Second operand 10 states and 234 transitions. [2024-06-20 15:18:42,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 644 transitions, 12059 flow [2024-06-20 15:18:47,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 644 transitions, 11235 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-20 15:18:47,405 INFO L231 Difference]: Finished difference. Result has 455 places, 615 transitions, 9951 flow [2024-06-20 15:18:47,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9139, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9951, PETRI_PLACES=455, PETRI_TRANSITIONS=615} [2024-06-20 15:18:47,409 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 414 predicate places. [2024-06-20 15:18:47,409 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 615 transitions, 9951 flow [2024-06-20 15:18:47,409 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) [2024-06-20 15:18:47,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:47,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:47,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 15:18:47,410 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)] === [2024-06-20 15:18:47,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:47,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1555976000, now seen corresponding path program 6 times [2024-06-20 15:18:47,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:47,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052098472] [2024-06-20 15:18:47,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:47,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:47,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:47,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052098472] [2024-06-20 15:18:47,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052098472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:47,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:47,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:18:47,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640652210] [2024-06-20 15:18:47,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:47,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:18:47,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:47,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:18:47,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:18:47,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:47,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 615 transitions, 9951 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) [2024-06-20 15:18:47,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:47,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:47,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:48,750 INFO L124 PetriNetUnfolderBase]: 3223/5369 cut-off events. [2024-06-20 15:18:48,750 INFO L125 PetriNetUnfolderBase]: For 819075/819075 co-relation queries the response was YES. [2024-06-20 15:18:48,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45569 conditions, 5369 events. 3223/5369 cut-off events. For 819075/819075 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 35578 event pairs, 672 based on Foata normal form. 1/5355 useless extension candidates. Maximal degree in co-relation 45372. Up to 4201 conditions per place. [2024-06-20 15:18:48,833 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 266 selfloop transitions, 369 changer transitions 0/642 dead transitions. [2024-06-20 15:18:48,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 642 transitions, 11751 flow [2024-06-20 15:18:48,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:18:48,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:18:48,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-20 15:18:48,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-06-20 15:18:48,834 INFO L175 Difference]: Start difference. First operand has 455 places, 615 transitions, 9951 flow. Second operand 9 states and 215 transitions. [2024-06-20 15:18:48,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 642 transitions, 11751 flow [2024-06-20 15:18:53,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 642 transitions, 11182 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 15:18:53,105 INFO L231 Difference]: Finished difference. Result has 458 places, 615 transitions, 10126 flow [2024-06-20 15:18:53,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9382, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10126, PETRI_PLACES=458, PETRI_TRANSITIONS=615} [2024-06-20 15:18:53,106 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 417 predicate places. [2024-06-20 15:18:53,106 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 615 transitions, 10126 flow [2024-06-20 15:18:53,106 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) [2024-06-20 15:18:53,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:53,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:53,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 15:18:53,107 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)] === [2024-06-20 15:18:53,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:53,107 INFO L85 PathProgramCache]: Analyzing trace with hash -523050725, now seen corresponding path program 7 times [2024-06-20 15:18:53,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:53,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230266474] [2024-06-20 15:18:53,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:53,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:53,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:53,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230266474] [2024-06-20 15:18:53,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230266474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:53,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:53,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:53,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686519726] [2024-06-20 15:18:53,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:53,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:53,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:53,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:53,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:53,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:53,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 615 transitions, 10126 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) [2024-06-20 15:18:53,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:53,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:53,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:54,383 INFO L124 PetriNetUnfolderBase]: 3257/5436 cut-off events. [2024-06-20 15:18:54,384 INFO L125 PetriNetUnfolderBase]: For 869689/869689 co-relation queries the response was YES. [2024-06-20 15:18:54,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46770 conditions, 5436 events. 3257/5436 cut-off events. For 869689/869689 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 36127 event pairs, 593 based on Foata normal form. 2/5424 useless extension candidates. Maximal degree in co-relation 46571. Up to 4782 conditions per place. [2024-06-20 15:18:54,475 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 557 selfloop transitions, 87 changer transitions 0/651 dead transitions. [2024-06-20 15:18:54,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 651 transitions, 11894 flow [2024-06-20 15:18:54,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:54,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:54,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 15:18:54,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-20 15:18:54,476 INFO L175 Difference]: Start difference. First operand has 458 places, 615 transitions, 10126 flow. Second operand 8 states and 191 transitions. [2024-06-20 15:18:54,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 651 transitions, 11894 flow [2024-06-20 15:18:59,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 651 transitions, 11148 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 15:18:59,634 INFO L231 Difference]: Finished difference. Result has 459 places, 621 transitions, 9754 flow [2024-06-20 15:18:59,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9380, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9754, PETRI_PLACES=459, PETRI_TRANSITIONS=621} [2024-06-20 15:18:59,635 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 418 predicate places. [2024-06-20 15:18:59,635 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 621 transitions, 9754 flow [2024-06-20 15:18:59,635 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) [2024-06-20 15:18:59,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:59,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:59,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 15:18:59,635 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)] === [2024-06-20 15:18:59,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:59,636 INFO L85 PathProgramCache]: Analyzing trace with hash -514479845, now seen corresponding path program 8 times [2024-06-20 15:18:59,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:59,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917860566] [2024-06-20 15:18:59,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:59,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:59,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:59,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:59,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917860566] [2024-06-20 15:18:59,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917860566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:59,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:59,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:59,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621680111] [2024-06-20 15:18:59,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:59,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:59,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:59,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:59,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:59,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:59,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 621 transitions, 9754 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) [2024-06-20 15:18:59,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:59,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:59,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:00,933 INFO L124 PetriNetUnfolderBase]: 3252/5434 cut-off events. [2024-06-20 15:19:00,933 INFO L125 PetriNetUnfolderBase]: For 867590/867590 co-relation queries the response was YES. [2024-06-20 15:19:01,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46078 conditions, 5434 events. 3252/5434 cut-off events. For 867590/867590 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 36101 event pairs, 599 based on Foata normal form. 2/5427 useless extension candidates. Maximal degree in co-relation 45877. Up to 4817 conditions per place. [2024-06-20 15:19:01,022 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 557 selfloop transitions, 82 changer transitions 0/646 dead transitions. [2024-06-20 15:19:01,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 646 transitions, 11094 flow [2024-06-20 15:19:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:01,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:01,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:19:01,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-20 15:19:01,023 INFO L175 Difference]: Start difference. First operand has 459 places, 621 transitions, 9754 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:19:01,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 646 transitions, 11094 flow [2024-06-20 15:19:05,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 646 transitions, 10846 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-20 15:19:05,840 INFO L231 Difference]: Finished difference. Result has 462 places, 621 transitions, 9675 flow [2024-06-20 15:19:05,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9506, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9675, PETRI_PLACES=462, PETRI_TRANSITIONS=621} [2024-06-20 15:19:05,841 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 421 predicate places. [2024-06-20 15:19:05,841 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 621 transitions, 9675 flow [2024-06-20 15:19:05,841 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) [2024-06-20 15:19:05,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:05,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:05,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 15:19:05,841 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)] === [2024-06-20 15:19:05,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:05,842 INFO L85 PathProgramCache]: Analyzing trace with hash -227592515, now seen corresponding path program 9 times [2024-06-20 15:19:05,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:05,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663970391] [2024-06-20 15:19:05,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:05,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:05,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:05,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663970391] [2024-06-20 15:19:05,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663970391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:05,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:05,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:05,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873004144] [2024-06-20 15:19:05,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:05,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:05,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:05,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:05,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:06,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:06,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 621 transitions, 9675 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) [2024-06-20 15:19:06,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:06,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:06,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:07,125 INFO L124 PetriNetUnfolderBase]: 3260/5446 cut-off events. [2024-06-20 15:19:07,126 INFO L125 PetriNetUnfolderBase]: For 880178/880178 co-relation queries the response was YES. [2024-06-20 15:19:07,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46085 conditions, 5446 events. 3260/5446 cut-off events. For 880178/880178 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 36202 event pairs, 599 based on Foata normal form. 2/5439 useless extension candidates. Maximal degree in co-relation 45883. Up to 4829 conditions per place. [2024-06-20 15:19:07,218 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 560 selfloop transitions, 83 changer transitions 0/650 dead transitions. [2024-06-20 15:19:07,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 650 transitions, 11069 flow [2024-06-20 15:19:07,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:19:07,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:19:07,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-20 15:19:07,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555 [2024-06-20 15:19:07,220 INFO L175 Difference]: Start difference. First operand has 462 places, 621 transitions, 9675 flow. Second operand 10 states and 222 transitions. [2024-06-20 15:19:07,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 650 transitions, 11069 flow [2024-06-20 15:19:12,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 650 transitions, 10886 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 15:19:12,481 INFO L231 Difference]: Finished difference. Result has 466 places, 623 transitions, 9709 flow [2024-06-20 15:19:12,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9492, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9709, PETRI_PLACES=466, PETRI_TRANSITIONS=623} [2024-06-20 15:19:12,482 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 425 predicate places. [2024-06-20 15:19:12,482 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 623 transitions, 9709 flow [2024-06-20 15:19:12,482 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) [2024-06-20 15:19:12,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:12,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:12,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 15:19:12,482 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)] === [2024-06-20 15:19:12,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:12,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1802893635, now seen corresponding path program 10 times [2024-06-20 15:19:12,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:12,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763642372] [2024-06-20 15:19:12,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:12,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:12,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:12,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763642372] [2024-06-20 15:19:12,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763642372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:12,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:12,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:12,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414929590] [2024-06-20 15:19:12,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:12,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:12,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:12,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:12,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:12,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:12,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 623 transitions, 9709 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) [2024-06-20 15:19:12,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:12,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:12,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:13,824 INFO L124 PetriNetUnfolderBase]: 3268/5458 cut-off events. [2024-06-20 15:19:13,824 INFO L125 PetriNetUnfolderBase]: For 894179/894179 co-relation queries the response was YES. [2024-06-20 15:19:13,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46285 conditions, 5458 events. 3268/5458 cut-off events. For 894179/894179 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 36271 event pairs, 599 based on Foata normal form. 2/5451 useless extension candidates. Maximal degree in co-relation 46082. Up to 4859 conditions per place. [2024-06-20 15:19:13,915 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 566 selfloop transitions, 71 changer transitions 0/644 dead transitions. [2024-06-20 15:19:13,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 644 transitions, 11075 flow [2024-06-20 15:19:13,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:13,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:13,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-20 15:19:13,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-20 15:19:13,916 INFO L175 Difference]: Start difference. First operand has 466 places, 623 transitions, 9709 flow. Second operand 8 states and 180 transitions. [2024-06-20 15:19:13,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 644 transitions, 11075 flow [2024-06-20 15:19:18,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 644 transitions, 10884 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 15:19:18,544 INFO L231 Difference]: Finished difference. Result has 466 places, 625 transitions, 9715 flow [2024-06-20 15:19:18,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9518, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9715, PETRI_PLACES=466, PETRI_TRANSITIONS=625} [2024-06-20 15:19:18,545 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 425 predicate places. [2024-06-20 15:19:18,545 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 625 transitions, 9715 flow [2024-06-20 15:19:18,545 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) [2024-06-20 15:19:18,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:18,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:18,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 15:19:18,545 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)] === [2024-06-20 15:19:18,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:18,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1918184805, now seen corresponding path program 11 times [2024-06-20 15:19:18,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:18,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138755284] [2024-06-20 15:19:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:18,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:18,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:18,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138755284] [2024-06-20 15:19:18,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138755284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:18,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:18,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:18,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826451891] [2024-06-20 15:19:18,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:18,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:18,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:18,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:18,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:18,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:18,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 625 transitions, 9715 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) [2024-06-20 15:19:18,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:18,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:18,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:19,789 INFO L124 PetriNetUnfolderBase]: 3276/5455 cut-off events. [2024-06-20 15:19:19,790 INFO L125 PetriNetUnfolderBase]: For 909609/909609 co-relation queries the response was YES. [2024-06-20 15:19:19,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46425 conditions, 5455 events. 3276/5455 cut-off events. For 909609/909609 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 36123 event pairs, 639 based on Foata normal form. 2/5442 useless extension candidates. Maximal degree in co-relation 46221. Up to 4660 conditions per place. [2024-06-20 15:19:19,882 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 459 selfloop transitions, 180 changer transitions 0/646 dead transitions. [2024-06-20 15:19:19,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 646 transitions, 11085 flow [2024-06-20 15:19:19,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:19,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:19,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-20 15:19:19,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-20 15:19:19,883 INFO L175 Difference]: Start difference. First operand has 466 places, 625 transitions, 9715 flow. Second operand 8 states and 185 transitions. [2024-06-20 15:19:19,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 646 transitions, 11085 flow [2024-06-20 15:19:25,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 646 transitions, 10914 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 15:19:25,296 INFO L231 Difference]: Finished difference. Result has 468 places, 627 transitions, 9959 flow [2024-06-20 15:19:25,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9544, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9959, PETRI_PLACES=468, PETRI_TRANSITIONS=627} [2024-06-20 15:19:25,297 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 427 predicate places. [2024-06-20 15:19:25,297 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 627 transitions, 9959 flow [2024-06-20 15:19:25,297 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) [2024-06-20 15:19:25,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:25,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:25,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-20 15:19:25,297 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)] === [2024-06-20 15:19:25,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:25,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1921041765, now seen corresponding path program 12 times [2024-06-20 15:19:25,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:25,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744943990] [2024-06-20 15:19:25,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:25,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:25,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:25,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744943990] [2024-06-20 15:19:25,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744943990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:25,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:25,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:25,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793745383] [2024-06-20 15:19:25,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:25,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:25,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:25,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:25,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:25,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:25,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 627 transitions, 9959 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) [2024-06-20 15:19:25,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:25,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:25,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:26,641 INFO L124 PetriNetUnfolderBase]: 3343/5554 cut-off events. [2024-06-20 15:19:26,641 INFO L125 PetriNetUnfolderBase]: For 1002114/1002114 co-relation queries the response was YES. [2024-06-20 15:19:26,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48726 conditions, 5554 events. 3343/5554 cut-off events. For 1002114/1002114 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 36808 event pairs, 650 based on Foata normal form. 2/5539 useless extension candidates. Maximal degree in co-relation 48521. Up to 4676 conditions per place. [2024-06-20 15:19:26,730 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 459 selfloop transitions, 189 changer transitions 0/655 dead transitions. [2024-06-20 15:19:26,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 655 transitions, 11685 flow [2024-06-20 15:19:26,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:26,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:26,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 15:19:26,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-20 15:19:26,732 INFO L175 Difference]: Start difference. First operand has 468 places, 627 transitions, 9959 flow. Second operand 8 states and 190 transitions. [2024-06-20 15:19:26,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 655 transitions, 11685 flow [2024-06-20 15:19:32,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 655 transitions, 11296 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 15:19:32,439 INFO L231 Difference]: Finished difference. Result has 471 places, 631 transitions, 10079 flow [2024-06-20 15:19:32,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9570, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10079, PETRI_PLACES=471, PETRI_TRANSITIONS=631} [2024-06-20 15:19:32,440 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 430 predicate places. [2024-06-20 15:19:32,440 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 631 transitions, 10079 flow [2024-06-20 15:19:32,440 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) [2024-06-20 15:19:32,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:32,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:32,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-20 15:19:32,440 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)] === [2024-06-20 15:19:32,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:32,440 INFO L85 PathProgramCache]: Analyzing trace with hash -431439747, now seen corresponding path program 1 times [2024-06-20 15:19:32,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:32,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217761178] [2024-06-20 15:19:32,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:32,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:32,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:32,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:32,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217761178] [2024-06-20 15:19:32,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217761178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:32,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:32,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:32,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280833794] [2024-06-20 15:19:32,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:32,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:32,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:32,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:32,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:32,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:32,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 631 transitions, 10079 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) [2024-06-20 15:19:32,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:32,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:32,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:33,903 INFO L124 PetriNetUnfolderBase]: 3351/5584 cut-off events. [2024-06-20 15:19:33,903 INFO L125 PetriNetUnfolderBase]: For 1016869/1016869 co-relation queries the response was YES. [2024-06-20 15:19:33,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49083 conditions, 5584 events. 3351/5584 cut-off events. For 1016869/1016869 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 37150 event pairs, 613 based on Foata normal form. 2/5577 useless extension candidates. Maximal degree in co-relation 48876. Up to 4987 conditions per place. [2024-06-20 15:19:33,989 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 580 selfloop transitions, 68 changer transitions 0/655 dead transitions. [2024-06-20 15:19:33,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 655 transitions, 11461 flow [2024-06-20 15:19:33,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:33,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:33,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-20 15:19:33,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-20 15:19:33,990 INFO L175 Difference]: Start difference. First operand has 471 places, 631 transitions, 10079 flow. Second operand 8 states and 182 transitions. [2024-06-20 15:19:33,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 655 transitions, 11461 flow [2024-06-20 15:19:39,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 655 transitions, 11068 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 15:19:39,684 INFO L231 Difference]: Finished difference. Result has 474 places, 633 transitions, 9863 flow [2024-06-20 15:19:39,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9686, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9863, PETRI_PLACES=474, PETRI_TRANSITIONS=633} [2024-06-20 15:19:39,685 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 433 predicate places. [2024-06-20 15:19:39,685 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 633 transitions, 9863 flow [2024-06-20 15:19:39,685 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) [2024-06-20 15:19:39,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:39,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:39,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-20 15:19:39,686 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)] === [2024-06-20 15:19:39,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:39,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1264974908, now seen corresponding path program 7 times [2024-06-20 15:19:39,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:39,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761544156] [2024-06-20 15:19:39,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:39,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:39,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:39,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761544156] [2024-06-20 15:19:39,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761544156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:39,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:39,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:39,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763876641] [2024-06-20 15:19:39,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:39,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:39,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:39,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:39,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:39,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:39,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 633 transitions, 9863 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) [2024-06-20 15:19:39,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:39,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:39,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:41,108 INFO L124 PetriNetUnfolderBase]: 3380/5644 cut-off events. [2024-06-20 15:19:41,108 INFO L125 PetriNetUnfolderBase]: For 1050494/1050511 co-relation queries the response was YES. [2024-06-20 15:19:41,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49545 conditions, 5644 events. 3380/5644 cut-off events. For 1050494/1050511 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 37725 event pairs, 643 based on Foata normal form. 13/5650 useless extension candidates. Maximal degree in co-relation 49337. Up to 4542 conditions per place. [2024-06-20 15:19:41,367 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 344 selfloop transitions, 325 changer transitions 0/676 dead transitions. [2024-06-20 15:19:41,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 676 transitions, 12256 flow [2024-06-20 15:19:41,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:19:41,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:19:41,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-20 15:19:41,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-20 15:19:41,368 INFO L175 Difference]: Start difference. First operand has 474 places, 633 transitions, 9863 flow. Second operand 9 states and 217 transitions. [2024-06-20 15:19:41,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 676 transitions, 12256 flow [2024-06-20 15:19:47,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 676 transitions, 12091 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 15:19:47,545 INFO L231 Difference]: Finished difference. Result has 476 places, 645 transitions, 10589 flow [2024-06-20 15:19:47,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9698, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10589, PETRI_PLACES=476, PETRI_TRANSITIONS=645} [2024-06-20 15:19:47,545 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 435 predicate places. [2024-06-20 15:19:47,545 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 645 transitions, 10589 flow [2024-06-20 15:19:47,545 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) [2024-06-20 15:19:47,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:47,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:47,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-20 15:19:47,546 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)] === [2024-06-20 15:19:47,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:47,546 INFO L85 PathProgramCache]: Analyzing trace with hash 214118080, now seen corresponding path program 8 times [2024-06-20 15:19:47,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:47,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397700291] [2024-06-20 15:19:47,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:47,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:47,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:47,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397700291] [2024-06-20 15:19:47,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397700291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:47,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:47,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:47,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81737563] [2024-06-20 15:19:47,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:47,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:47,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:47,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:47,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:47,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:47,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 645 transitions, 10589 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) [2024-06-20 15:19:47,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:47,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:47,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:48,933 INFO L124 PetriNetUnfolderBase]: 3401/5679 cut-off events. [2024-06-20 15:19:48,933 INFO L125 PetriNetUnfolderBase]: For 1085398/1085415 co-relation queries the response was YES. [2024-06-20 15:19:49,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50773 conditions, 5679 events. 3401/5679 cut-off events. For 1085398/1085415 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 38026 event pairs, 643 based on Foata normal form. 13/5685 useless extension candidates. Maximal degree in co-relation 50564. Up to 4566 conditions per place. [2024-06-20 15:19:49,029 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 336 selfloop transitions, 341 changer transitions 0/684 dead transitions. [2024-06-20 15:19:49,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 684 transitions, 12945 flow [2024-06-20 15:19:49,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:19:49,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:19:49,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-20 15:19:49,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-20 15:19:49,031 INFO L175 Difference]: Start difference. First operand has 476 places, 645 transitions, 10589 flow. Second operand 11 states and 250 transitions. [2024-06-20 15:19:49,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 684 transitions, 12945 flow [2024-06-20 15:19:55,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 684 transitions, 12242 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 15:19:55,417 INFO L231 Difference]: Finished difference. Result has 481 places, 654 transitions, 10754 flow [2024-06-20 15:19:55,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9904, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10754, PETRI_PLACES=481, PETRI_TRANSITIONS=654} [2024-06-20 15:19:55,418 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 440 predicate places. [2024-06-20 15:19:55,418 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 654 transitions, 10754 flow [2024-06-20 15:19:55,418 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) [2024-06-20 15:19:55,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:55,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:55,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-20 15:19:55,418 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)] === [2024-06-20 15:19:55,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:55,419 INFO L85 PathProgramCache]: Analyzing trace with hash 214106920, now seen corresponding path program 9 times [2024-06-20 15:19:55,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:55,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469732536] [2024-06-20 15:19:55,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:55,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:55,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:55,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:55,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469732536] [2024-06-20 15:19:55,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469732536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:55,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:55,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:55,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381473911] [2024-06-20 15:19:55,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:55,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:55,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:55,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:55,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:55,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:55,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 654 transitions, 10754 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) [2024-06-20 15:19:55,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:55,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:55,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:56,806 INFO L124 PetriNetUnfolderBase]: 3398/5675 cut-off events. [2024-06-20 15:19:56,806 INFO L125 PetriNetUnfolderBase]: For 1093432/1093449 co-relation queries the response was YES. [2024-06-20 15:19:56,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50736 conditions, 5675 events. 3398/5675 cut-off events. For 1093432/1093449 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37982 event pairs, 643 based on Foata normal form. 13/5681 useless extension candidates. Maximal degree in co-relation 50526. Up to 4563 conditions per place. [2024-06-20 15:19:56,904 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 338 selfloop transitions, 338 changer transitions 0/683 dead transitions. [2024-06-20 15:19:56,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 683 transitions, 12932 flow [2024-06-20 15:19:56,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:19:56,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:19:56,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 234 transitions. [2024-06-20 15:19:56,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.585 [2024-06-20 15:19:56,906 INFO L175 Difference]: Start difference. First operand has 481 places, 654 transitions, 10754 flow. Second operand 10 states and 234 transitions. [2024-06-20 15:19:56,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 683 transitions, 12932 flow [2024-06-20 15:20:03,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 683 transitions, 12297 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-20 15:20:03,504 INFO L231 Difference]: Finished difference. Result has 484 places, 654 transitions, 10801 flow [2024-06-20 15:20:03,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10119, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10801, PETRI_PLACES=484, PETRI_TRANSITIONS=654} [2024-06-20 15:20:03,504 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 443 predicate places. [2024-06-20 15:20:03,504 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 654 transitions, 10801 flow [2024-06-20 15:20:03,504 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) [2024-06-20 15:20:03,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:03,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:03,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-20 15:20:03,505 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)] === [2024-06-20 15:20:03,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:03,505 INFO L85 PathProgramCache]: Analyzing trace with hash 38618710, now seen corresponding path program 10 times [2024-06-20 15:20:03,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:03,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329145757] [2024-06-20 15:20:03,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:03,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:03,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:03,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:03,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329145757] [2024-06-20 15:20:03,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329145757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:03,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:03,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:03,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406910355] [2024-06-20 15:20:03,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:03,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:03,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:03,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:03,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:03,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:03,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 654 transitions, 10801 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) [2024-06-20 15:20:03,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:03,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:03,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:04,901 INFO L124 PetriNetUnfolderBase]: 3395/5669 cut-off events. [2024-06-20 15:20:04,901 INFO L125 PetriNetUnfolderBase]: For 1102249/1102260 co-relation queries the response was YES. [2024-06-20 15:20:04,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50729 conditions, 5669 events. 3395/5669 cut-off events. For 1102249/1102260 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37891 event pairs, 680 based on Foata normal form. 9/5670 useless extension candidates. Maximal degree in co-relation 50518. Up to 4560 conditions per place. [2024-06-20 15:20:04,999 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 360 selfloop transitions, 309 changer transitions 0/676 dead transitions. [2024-06-20 15:20:04,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 676 transitions, 12701 flow [2024-06-20 15:20:05,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:05,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 15:20:05,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-20 15:20:05,000 INFO L175 Difference]: Start difference. First operand has 484 places, 654 transitions, 10801 flow. Second operand 7 states and 169 transitions. [2024-06-20 15:20:05,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 676 transitions, 12701 flow [2024-06-20 15:20:13,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 676 transitions, 12019 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 15:20:13,438 INFO L231 Difference]: Finished difference. Result has 484 places, 654 transitions, 10743 flow [2024-06-20 15:20:13,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10119, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10743, PETRI_PLACES=484, PETRI_TRANSITIONS=654} [2024-06-20 15:20:13,439 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 443 predicate places. [2024-06-20 15:20:13,439 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 654 transitions, 10743 flow [2024-06-20 15:20:13,439 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) [2024-06-20 15:20:13,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:13,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:13,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-20 15:20:13,440 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)] === [2024-06-20 15:20:13,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:13,440 INFO L85 PathProgramCache]: Analyzing trace with hash 42343360, now seen corresponding path program 11 times [2024-06-20 15:20:13,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:13,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386732441] [2024-06-20 15:20:13,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:13,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:13,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:13,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386732441] [2024-06-20 15:20:13,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386732441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:13,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:13,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:13,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045338441] [2024-06-20 15:20:13,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:13,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:13,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:13,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:13,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:13,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:13,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 654 transitions, 10743 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) [2024-06-20 15:20:13,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:13,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:13,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:14,938 INFO L124 PetriNetUnfolderBase]: 3400/5663 cut-off events. [2024-06-20 15:20:14,938 INFO L125 PetriNetUnfolderBase]: For 1115165/1115165 co-relation queries the response was YES. [2024-06-20 15:20:15,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50803 conditions, 5663 events. 3400/5663 cut-off events. For 1115165/1115165 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37757 event pairs, 633 based on Foata normal form. 1/5655 useless extension candidates. Maximal degree in co-relation 50591. Up to 4892 conditions per place. [2024-06-20 15:20:15,039 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 486 selfloop transitions, 189 changer transitions 0/682 dead transitions. [2024-06-20 15:20:15,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 682 transitions, 12194 flow [2024-06-20 15:20:15,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:20:15,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:20:15,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-20 15:20:15,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-20 15:20:15,040 INFO L175 Difference]: Start difference. First operand has 484 places, 654 transitions, 10743 flow. Second operand 9 states and 208 transitions. [2024-06-20 15:20:15,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 682 transitions, 12194 flow [2024-06-20 15:20:21,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 682 transitions, 11545 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:20:21,654 INFO L231 Difference]: Finished difference. Result has 486 places, 657 transitions, 10523 flow [2024-06-20 15:20:21,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10100, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10523, PETRI_PLACES=486, PETRI_TRANSITIONS=657} [2024-06-20 15:20:21,655 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 445 predicate places. [2024-06-20 15:20:21,655 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 657 transitions, 10523 flow [2024-06-20 15:20:21,655 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) [2024-06-20 15:20:21,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:21,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:21,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-20 15:20:21,656 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)] === [2024-06-20 15:20:21,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:21,656 INFO L85 PathProgramCache]: Analyzing trace with hash -508467068, now seen corresponding path program 12 times [2024-06-20 15:20:21,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:21,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225917500] [2024-06-20 15:20:21,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:21,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:21,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:21,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225917500] [2024-06-20 15:20:21,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225917500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:21,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:21,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:21,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318821631] [2024-06-20 15:20:21,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:21,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:21,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:21,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:21,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:21,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:21,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 657 transitions, 10523 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) [2024-06-20 15:20:21,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:21,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:21,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:23,118 INFO L124 PetriNetUnfolderBase]: 3405/5672 cut-off events. [2024-06-20 15:20:23,119 INFO L125 PetriNetUnfolderBase]: For 1129751/1129751 co-relation queries the response was YES. [2024-06-20 15:20:23,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50641 conditions, 5672 events. 3405/5672 cut-off events. For 1129751/1129751 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 37812 event pairs, 633 based on Foata normal form. 1/5664 useless extension candidates. Maximal degree in co-relation 50428. Up to 4893 conditions per place. [2024-06-20 15:20:23,373 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 484 selfloop transitions, 194 changer transitions 0/685 dead transitions. [2024-06-20 15:20:23,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 685 transitions, 11978 flow [2024-06-20 15:20:23,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:20:23,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:20:23,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-20 15:20:23,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-20 15:20:23,374 INFO L175 Difference]: Start difference. First operand has 486 places, 657 transitions, 10523 flow. Second operand 9 states and 210 transitions. [2024-06-20 15:20:23,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 685 transitions, 11978 flow [2024-06-20 15:20:29,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 685 transitions, 11592 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 15:20:29,592 INFO L231 Difference]: Finished difference. Result has 488 places, 660 transitions, 10574 flow [2024-06-20 15:20:29,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10137, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10574, PETRI_PLACES=488, PETRI_TRANSITIONS=660} [2024-06-20 15:20:29,593 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 447 predicate places. [2024-06-20 15:20:29,593 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 660 transitions, 10574 flow [2024-06-20 15:20:29,593 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) [2024-06-20 15:20:29,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:29,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:29,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-20 15:20:29,593 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)] === [2024-06-20 15:20:29,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:29,594 INFO L85 PathProgramCache]: Analyzing trace with hash 253992158, now seen corresponding path program 13 times [2024-06-20 15:20:29,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:29,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23866059] [2024-06-20 15:20:29,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:29,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:29,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:29,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23866059] [2024-06-20 15:20:29,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23866059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:29,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:29,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:29,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044562060] [2024-06-20 15:20:29,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:29,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:29,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:29,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:29,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:29,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:29,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 660 transitions, 10574 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) [2024-06-20 15:20:29,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:29,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:29,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:31,225 INFO L124 PetriNetUnfolderBase]: 3418/5695 cut-off events. [2024-06-20 15:20:31,225 INFO L125 PetriNetUnfolderBase]: For 1155453/1155453 co-relation queries the response was YES. [2024-06-20 15:20:31,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51061 conditions, 5695 events. 3418/5695 cut-off events. For 1155453/1155453 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 38027 event pairs, 632 based on Foata normal form. 1/5687 useless extension candidates. Maximal degree in co-relation 50847. Up to 4908 conditions per place. [2024-06-20 15:20:31,314 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 491 selfloop transitions, 198 changer transitions 0/696 dead transitions. [2024-06-20 15:20:31,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 696 transitions, 12398 flow [2024-06-20 15:20:31,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:20:31,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:20:31,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 281 transitions. [2024-06-20 15:20:31,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403846153846154 [2024-06-20 15:20:31,316 INFO L175 Difference]: Start difference. First operand has 488 places, 660 transitions, 10574 flow. Second operand 13 states and 281 transitions. [2024-06-20 15:20:31,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 696 transitions, 12398 flow [2024-06-20 15:20:38,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 696 transitions, 11998 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 15:20:38,964 INFO L231 Difference]: Finished difference. Result has 495 places, 666 transitions, 10711 flow [2024-06-20 15:20:38,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10174, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10711, PETRI_PLACES=495, PETRI_TRANSITIONS=666} [2024-06-20 15:20:38,965 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 454 predicate places. [2024-06-20 15:20:38,965 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 666 transitions, 10711 flow [2024-06-20 15:20:38,965 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) [2024-06-20 15:20:38,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:38,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:38,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-20 15:20:38,965 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)] === [2024-06-20 15:20:38,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:38,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1512362900, now seen corresponding path program 14 times [2024-06-20 15:20:38,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:38,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772958948] [2024-06-20 15:20:38,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:38,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:39,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:39,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:39,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772958948] [2024-06-20 15:20:39,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772958948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:39,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:39,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:39,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215726291] [2024-06-20 15:20:39,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:39,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:39,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:39,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:39,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:39,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:39,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 666 transitions, 10711 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) [2024-06-20 15:20:39,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:39,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:39,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:40,609 INFO L124 PetriNetUnfolderBase]: 3423/5704 cut-off events. [2024-06-20 15:20:40,609 INFO L125 PetriNetUnfolderBase]: For 1172729/1172729 co-relation queries the response was YES. [2024-06-20 15:20:40,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51298 conditions, 5704 events. 3423/5704 cut-off events. For 1172729/1172729 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 38089 event pairs, 632 based on Foata normal form. 1/5696 useless extension candidates. Maximal degree in co-relation 51082. Up to 4914 conditions per place. [2024-06-20 15:20:40,700 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 493 selfloop transitions, 201 changer transitions 0/701 dead transitions. [2024-06-20 15:20:40,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 701 transitions, 12503 flow [2024-06-20 15:20:40,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-20 15:20:40,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-20 15:20:40,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 317 transitions. [2024-06-20 15:20:40,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283333333333333 [2024-06-20 15:20:40,713 INFO L175 Difference]: Start difference. First operand has 495 places, 666 transitions, 10711 flow. Second operand 15 states and 317 transitions. [2024-06-20 15:20:40,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 701 transitions, 12503 flow [2024-06-20 15:20:47,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 701 transitions, 12033 flow, removed 42 selfloop flow, removed 10 redundant places. [2024-06-20 15:20:47,107 INFO L231 Difference]: Finished difference. Result has 500 places, 669 transitions, 10715 flow [2024-06-20 15:20:47,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10268, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10715, PETRI_PLACES=500, PETRI_TRANSITIONS=669} [2024-06-20 15:20:47,107 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 459 predicate places. [2024-06-20 15:20:47,108 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 669 transitions, 10715 flow [2024-06-20 15:20:47,108 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) [2024-06-20 15:20:47,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:47,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:47,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-20 15:20:47,108 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)] === [2024-06-20 15:20:47,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:47,108 INFO L85 PathProgramCache]: Analyzing trace with hash 402740364, now seen corresponding path program 15 times [2024-06-20 15:20:47,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:47,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156248972] [2024-06-20 15:20:47,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:47,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:47,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:47,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156248972] [2024-06-20 15:20:47,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156248972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:47,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:47,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:47,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261541371] [2024-06-20 15:20:47,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:47,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:47,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:47,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:47,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:47,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:47,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 669 transitions, 10715 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) [2024-06-20 15:20:47,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:47,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:47,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:48,695 INFO L124 PetriNetUnfolderBase]: 3444/5740 cut-off events. [2024-06-20 15:20:48,695 INFO L125 PetriNetUnfolderBase]: For 1207511/1207511 co-relation queries the response was YES. [2024-06-20 15:20:48,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51867 conditions, 5740 events. 3444/5740 cut-off events. For 1207511/1207511 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 38431 event pairs, 630 based on Foata normal form. 1/5732 useless extension candidates. Maximal degree in co-relation 51650. Up to 4920 conditions per place. [2024-06-20 15:20:48,787 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 484 selfloop transitions, 217 changer transitions 0/708 dead transitions. [2024-06-20 15:20:48,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 708 transitions, 12906 flow [2024-06-20 15:20:48,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:20:48,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:20:48,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 269 transitions. [2024-06-20 15:20:48,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5604166666666667 [2024-06-20 15:20:48,789 INFO L175 Difference]: Start difference. First operand has 500 places, 669 transitions, 10715 flow. Second operand 12 states and 269 transitions. [2024-06-20 15:20:48,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 708 transitions, 12906 flow [2024-06-20 15:20:56,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 708 transitions, 12492 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-20 15:20:56,563 INFO L231 Difference]: Finished difference. Result has 500 places, 678 transitions, 10966 flow [2024-06-20 15:20:56,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10301, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10966, PETRI_PLACES=500, PETRI_TRANSITIONS=678} [2024-06-20 15:20:56,564 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 459 predicate places. [2024-06-20 15:20:56,564 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 678 transitions, 10966 flow [2024-06-20 15:20:56,564 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) [2024-06-20 15:20:56,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:56,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:56,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-20 15:20:56,564 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)] === [2024-06-20 15:20:56,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:56,565 INFO L85 PathProgramCache]: Analyzing trace with hash -227403260, now seen corresponding path program 16 times [2024-06-20 15:20:56,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:56,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846612240] [2024-06-20 15:20:56,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:56,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:56,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:56,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846612240] [2024-06-20 15:20:56,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846612240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:56,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:56,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:56,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666502227] [2024-06-20 15:20:56,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:56,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:56,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:56,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:56,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:56,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:56,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 678 transitions, 10966 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) [2024-06-20 15:20:56,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:56,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:56,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:58,177 INFO L124 PetriNetUnfolderBase]: 3441/5736 cut-off events. [2024-06-20 15:20:58,177 INFO L125 PetriNetUnfolderBase]: For 1216647/1216647 co-relation queries the response was YES. [2024-06-20 15:20:58,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51926 conditions, 5736 events. 3441/5736 cut-off events. For 1216647/1216647 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 38386 event pairs, 630 based on Foata normal form. 1/5728 useless extension candidates. Maximal degree in co-relation 51707. Up to 4917 conditions per place. [2024-06-20 15:20:58,271 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 482 selfloop transitions, 220 changer transitions 0/709 dead transitions. [2024-06-20 15:20:58,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 709 transitions, 12976 flow [2024-06-20 15:20:58,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:20:58,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:20:58,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 286 transitions. [2024-06-20 15:20:58,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 15:20:58,273 INFO L175 Difference]: Start difference. First operand has 500 places, 678 transitions, 10966 flow. Second operand 13 states and 286 transitions. [2024-06-20 15:20:58,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 709 transitions, 12976 flow [2024-06-20 15:21:06,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 709 transitions, 12644 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-20 15:21:06,074 INFO L231 Difference]: Finished difference. Result has 506 places, 678 transitions, 11080 flow [2024-06-20 15:21:06,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10634, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11080, PETRI_PLACES=506, PETRI_TRANSITIONS=678} [2024-06-20 15:21:06,075 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 465 predicate places. [2024-06-20 15:21:06,075 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 678 transitions, 11080 flow [2024-06-20 15:21:06,075 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) [2024-06-20 15:21:06,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:06,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:06,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-20 15:21:06,076 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)] === [2024-06-20 15:21:06,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:06,076 INFO L85 PathProgramCache]: Analyzing trace with hash -227587400, now seen corresponding path program 17 times [2024-06-20 15:21:06,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:06,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86405293] [2024-06-20 15:21:06,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:06,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:06,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:06,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86405293] [2024-06-20 15:21:06,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86405293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:06,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:06,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:21:06,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897302563] [2024-06-20 15:21:06,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:06,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:21:06,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:06,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:21:06,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:21:06,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:06,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 678 transitions, 11080 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) [2024-06-20 15:21:06,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:06,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:06,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:07,645 INFO L124 PetriNetUnfolderBase]: 3438/5732 cut-off events. [2024-06-20 15:21:07,646 INFO L125 PetriNetUnfolderBase]: For 1224038/1224038 co-relation queries the response was YES. [2024-06-20 15:21:07,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52214 conditions, 5732 events. 3438/5732 cut-off events. For 1224038/1224038 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 38391 event pairs, 630 based on Foata normal form. 1/5724 useless extension candidates. Maximal degree in co-relation 51993. Up to 4914 conditions per place. [2024-06-20 15:21:07,742 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 485 selfloop transitions, 217 changer transitions 0/709 dead transitions. [2024-06-20 15:21:07,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 709 transitions, 12826 flow [2024-06-20 15:21:07,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 15:21:07,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 15:21:07,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 306 transitions. [2024-06-20 15:21:07,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5464285714285714 [2024-06-20 15:21:07,744 INFO L175 Difference]: Start difference. First operand has 506 places, 678 transitions, 11080 flow. Second operand 14 states and 306 transitions. [2024-06-20 15:21:07,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 709 transitions, 12826 flow [2024-06-20 15:21:14,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 709 transitions, 12346 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-06-20 15:21:14,762 INFO L231 Difference]: Finished difference. Result has 508 places, 678 transitions, 11040 flow [2024-06-20 15:21:14,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10600, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11040, PETRI_PLACES=508, PETRI_TRANSITIONS=678} [2024-06-20 15:21:14,762 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 467 predicate places. [2024-06-20 15:21:14,762 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 678 transitions, 11040 flow [2024-06-20 15:21:14,762 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) [2024-06-20 15:21:14,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:14,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:14,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-20 15:21:14,763 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)] === [2024-06-20 15:21:14,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:14,763 INFO L85 PathProgramCache]: Analyzing trace with hash -227581820, now seen corresponding path program 18 times [2024-06-20 15:21:14,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:14,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334502834] [2024-06-20 15:21:14,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:14,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:14,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:14,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:14,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334502834] [2024-06-20 15:21:14,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334502834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:14,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:14,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:21:14,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505334649] [2024-06-20 15:21:14,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:14,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:21:14,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:14,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:21:14,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:21:14,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:14,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 678 transitions, 11040 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) [2024-06-20 15:21:14,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:14,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:14,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:16,336 INFO L124 PetriNetUnfolderBase]: 3435/5726 cut-off events. [2024-06-20 15:21:16,337 INFO L125 PetriNetUnfolderBase]: For 1232326/1232326 co-relation queries the response was YES. [2024-06-20 15:21:16,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52129 conditions, 5726 events. 3435/5726 cut-off events. For 1232326/1232326 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 38334 event pairs, 633 based on Foata normal form. 1/5718 useless extension candidates. Maximal degree in co-relation 51908. Up to 4941 conditions per place. [2024-06-20 15:21:16,430 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 508 selfloop transitions, 190 changer transitions 0/705 dead transitions. [2024-06-20 15:21:16,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 705 transitions, 12502 flow [2024-06-20 15:21:16,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:21:16,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:21:16,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-20 15:21:16,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5613636363636364 [2024-06-20 15:21:16,432 INFO L175 Difference]: Start difference. First operand has 508 places, 678 transitions, 11040 flow. Second operand 11 states and 247 transitions. [2024-06-20 15:21:16,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 705 transitions, 12502 flow [2024-06-20 15:21:23,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 705 transitions, 12036 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-20 15:21:23,209 INFO L231 Difference]: Finished difference. Result has 506 places, 678 transitions, 10960 flow [2024-06-20 15:21:23,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10574, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10960, PETRI_PLACES=506, PETRI_TRANSITIONS=678} [2024-06-20 15:21:23,209 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 465 predicate places. [2024-06-20 15:21:23,209 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 678 transitions, 10960 flow [2024-06-20 15:21:23,210 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) [2024-06-20 15:21:23,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:23,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:23,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-20 15:21:23,210 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)] === [2024-06-20 15:21:23,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:23,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1341761163, now seen corresponding path program 2 times [2024-06-20 15:21:23,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:23,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613598195] [2024-06-20 15:21:23,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:23,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:23,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:23,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613598195] [2024-06-20 15:21:23,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613598195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:23,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:23,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:23,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261738115] [2024-06-20 15:21:23,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:23,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:23,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:23,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:23,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:23,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:23,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 678 transitions, 10960 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) [2024-06-20 15:21:23,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:23,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:23,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:24,736 INFO L124 PetriNetUnfolderBase]: 3443/5745 cut-off events. [2024-06-20 15:21:24,736 INFO L125 PetriNetUnfolderBase]: For 1258771/1258771 co-relation queries the response was YES. [2024-06-20 15:21:24,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52289 conditions, 5745 events. 3443/5745 cut-off events. For 1258771/1258771 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 38540 event pairs, 611 based on Foata normal form. 2/5738 useless extension candidates. Maximal degree in co-relation 52067. Up to 5116 conditions per place. [2024-06-20 15:21:24,835 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 625 selfloop transitions, 68 changer transitions 0/700 dead transitions. [2024-06-20 15:21:24,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 700 transitions, 12430 flow [2024-06-20 15:21:24,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:21:24,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:21:24,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-20 15:21:24,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 15:21:24,836 INFO L175 Difference]: Start difference. First operand has 506 places, 678 transitions, 10960 flow. Second operand 9 states and 198 transitions. [2024-06-20 15:21:24,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 700 transitions, 12430 flow [2024-06-20 15:21:31,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 700 transitions, 12034 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-20 15:21:31,875 INFO L231 Difference]: Finished difference. Result has 504 places, 680 transitions, 10745 flow [2024-06-20 15:21:31,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10564, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10745, PETRI_PLACES=504, PETRI_TRANSITIONS=680} [2024-06-20 15:21:31,875 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 463 predicate places. [2024-06-20 15:21:31,875 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 680 transitions, 10745 flow [2024-06-20 15:21:31,875 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) [2024-06-20 15:21:31,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:31,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:31,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-20 15:21:31,876 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)] === [2024-06-20 15:21:31,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:31,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1927470272, now seen corresponding path program 19 times [2024-06-20 15:21:31,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:31,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843899928] [2024-06-20 15:21:31,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:31,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:32,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:32,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:32,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843899928] [2024-06-20 15:21:32,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843899928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:32,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:32,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:21:32,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882738495] [2024-06-20 15:21:32,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:32,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:21:32,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:32,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:21:32,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:21:32,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:32,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 680 transitions, 10745 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) [2024-06-20 15:21:32,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:32,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:32,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:33,476 INFO L124 PetriNetUnfolderBase]: 3448/5747 cut-off events. [2024-06-20 15:21:33,476 INFO L125 PetriNetUnfolderBase]: For 1266601/1266601 co-relation queries the response was YES. [2024-06-20 15:21:33,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52220 conditions, 5747 events. 3448/5747 cut-off events. For 1266601/1266601 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 38460 event pairs, 633 based on Foata normal form. 1/5739 useless extension candidates. Maximal degree in co-relation 51997. Up to 4999 conditions per place. [2024-06-20 15:21:33,575 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 537 selfloop transitions, 158 changer transitions 0/702 dead transitions. [2024-06-20 15:21:33,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 702 transitions, 12244 flow [2024-06-20 15:21:33,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:21:33,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:21:33,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-20 15:21:33,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-20 15:21:33,576 INFO L175 Difference]: Start difference. First operand has 504 places, 680 transitions, 10745 flow. Second operand 9 states and 203 transitions. [2024-06-20 15:21:33,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 702 transitions, 12244 flow [2024-06-20 15:21:41,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 702 transitions, 12087 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 15:21:41,511 INFO L231 Difference]: Finished difference. Result has 506 places, 683 transitions, 10979 flow [2024-06-20 15:21:41,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10588, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10979, PETRI_PLACES=506, PETRI_TRANSITIONS=683} [2024-06-20 15:21:41,511 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 465 predicate places. [2024-06-20 15:21:41,511 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 683 transitions, 10979 flow [2024-06-20 15:21:41,512 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) [2024-06-20 15:21:41,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:41,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:41,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-20 15:21:41,512 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)] === [2024-06-20 15:21:41,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:41,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1306770924, now seen corresponding path program 20 times [2024-06-20 15:21:41,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:41,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144697441] [2024-06-20 15:21:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:41,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:41,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:41,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144697441] [2024-06-20 15:21:41,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144697441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:41,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:41,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:21:41,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251219217] [2024-06-20 15:21:41,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:41,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:21:41,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:41,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:21:41,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:21:41,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:41,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 683 transitions, 10979 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) [2024-06-20 15:21:41,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:41,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:41,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:43,058 INFO L124 PetriNetUnfolderBase]: 3469/5789 cut-off events. [2024-06-20 15:21:43,059 INFO L125 PetriNetUnfolderBase]: For 1305036/1305036 co-relation queries the response was YES. [2024-06-20 15:21:43,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53077 conditions, 5789 events. 3469/5789 cut-off events. For 1305036/1305036 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 38872 event pairs, 623 based on Foata normal form. 1/5781 useless extension candidates. Maximal degree in co-relation 52853. Up to 5003 conditions per place. [2024-06-20 15:21:43,160 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 537 selfloop transitions, 171 changer transitions 0/715 dead transitions. [2024-06-20 15:21:43,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 715 transitions, 13208 flow [2024-06-20 15:21:43,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:21:43,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:21:43,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 245 transitions. [2024-06-20 15:21:43,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-20 15:21:43,161 INFO L175 Difference]: Start difference. First operand has 506 places, 683 transitions, 10979 flow. Second operand 11 states and 245 transitions. [2024-06-20 15:21:43,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 715 transitions, 13208 flow [2024-06-20 15:21:51,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 715 transitions, 12854 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 15:21:51,145 INFO L231 Difference]: Finished difference. Result has 511 places, 692 transitions, 11215 flow [2024-06-20 15:21:51,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10625, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11215, PETRI_PLACES=511, PETRI_TRANSITIONS=692} [2024-06-20 15:21:51,146 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 470 predicate places. [2024-06-20 15:21:51,146 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 692 transitions, 11215 flow [2024-06-20 15:21:51,146 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) [2024-06-20 15:21:51,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:51,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:51,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-20 15:21:51,147 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)] === [2024-06-20 15:21:51,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:51,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1918179690, now seen corresponding path program 21 times [2024-06-20 15:21:51,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:51,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738984199] [2024-06-20 15:21:51,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:51,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:51,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:51,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738984199] [2024-06-20 15:21:51,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738984199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:51,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:51,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:21:51,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679321029] [2024-06-20 15:21:51,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:51,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:21:51,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:51,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:21:51,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:21:51,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:51,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 692 transitions, 11215 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) [2024-06-20 15:21:51,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:51,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:51,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:52,748 INFO L124 PetriNetUnfolderBase]: 3474/5791 cut-off events. [2024-06-20 15:21:52,749 INFO L125 PetriNetUnfolderBase]: For 1324672/1324672 co-relation queries the response was YES. [2024-06-20 15:21:52,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53305 conditions, 5791 events. 3474/5791 cut-off events. For 1324672/1324672 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 38895 event pairs, 667 based on Foata normal form. 1/5777 useless extension candidates. Maximal degree in co-relation 53079. Up to 4540 conditions per place. [2024-06-20 15:21:52,852 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 288 selfloop transitions, 426 changer transitions 0/721 dead transitions. [2024-06-20 15:21:52,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 721 transitions, 14141 flow [2024-06-20 15:21:52,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:21:52,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:21:52,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-20 15:21:52,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:21:52,853 INFO L175 Difference]: Start difference. First operand has 511 places, 692 transitions, 11215 flow. Second operand 11 states and 253 transitions. [2024-06-20 15:21:52,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 721 transitions, 14141 flow [2024-06-20 15:22:00,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 721 transitions, 13871 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:00,550 INFO L231 Difference]: Finished difference. Result has 516 places, 695 transitions, 11851 flow [2024-06-20 15:22:00,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10945, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11851, PETRI_PLACES=516, PETRI_TRANSITIONS=695} [2024-06-20 15:22:00,550 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 475 predicate places. [2024-06-20 15:22:00,550 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 695 transitions, 11851 flow [2024-06-20 15:22:00,550 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) [2024-06-20 15:22:00,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:00,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:00,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-20 15:22:00,551 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)] === [2024-06-20 15:22:00,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:00,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1802715540, now seen corresponding path program 22 times [2024-06-20 15:22:00,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:00,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411210012] [2024-06-20 15:22:00,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:00,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:00,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:00,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411210012] [2024-06-20 15:22:00,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411210012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:00,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:00,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:00,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676369013] [2024-06-20 15:22:00,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:00,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:00,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:00,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:00,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:00,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:00,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 695 transitions, 11851 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) [2024-06-20 15:22:00,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:00,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:00,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:02,129 INFO L124 PetriNetUnfolderBase]: 3479/5807 cut-off events. [2024-06-20 15:22:02,130 INFO L125 PetriNetUnfolderBase]: For 1344440/1344440 co-relation queries the response was YES. [2024-06-20 15:22:02,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54361 conditions, 5807 events. 3479/5807 cut-off events. For 1344440/1344440 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 39018 event pairs, 623 based on Foata normal form. 1/5799 useless extension candidates. Maximal degree in co-relation 54133. Up to 5016 conditions per place. [2024-06-20 15:22:02,239 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 541 selfloop transitions, 174 changer transitions 0/722 dead transitions. [2024-06-20 15:22:02,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 722 transitions, 13961 flow [2024-06-20 15:22:02,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:22:02,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:22:02,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 263 transitions. [2024-06-20 15:22:02,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5479166666666667 [2024-06-20 15:22:02,241 INFO L175 Difference]: Start difference. First operand has 516 places, 695 transitions, 11851 flow. Second operand 12 states and 263 transitions. [2024-06-20 15:22:02,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 722 transitions, 13961 flow [2024-06-20 15:22:10,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 722 transitions, 12768 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-20 15:22:10,784 INFO L231 Difference]: Finished difference. Result has 519 places, 698 transitions, 11076 flow [2024-06-20 15:22:10,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10664, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11076, PETRI_PLACES=519, PETRI_TRANSITIONS=698} [2024-06-20 15:22:10,785 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 478 predicate places. [2024-06-20 15:22:10,785 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 698 transitions, 11076 flow [2024-06-20 15:22:10,785 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) [2024-06-20 15:22:10,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:10,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:10,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-20 15:22:10,786 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)] === [2024-06-20 15:22:10,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:10,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1422056514, now seen corresponding path program 23 times [2024-06-20 15:22:10,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:10,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884195844] [2024-06-20 15:22:10,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:10,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:10,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:10,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884195844] [2024-06-20 15:22:10,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884195844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:10,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:10,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:10,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072693695] [2024-06-20 15:22:10,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:10,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:10,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:10,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:10,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:10,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:10,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 698 transitions, 11076 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) [2024-06-20 15:22:10,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:10,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:10,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:12,326 INFO L124 PetriNetUnfolderBase]: 3484/5783 cut-off events. [2024-06-20 15:22:12,327 INFO L125 PetriNetUnfolderBase]: For 1357759/1357759 co-relation queries the response was YES. [2024-06-20 15:22:12,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53499 conditions, 5783 events. 3484/5783 cut-off events. For 1357759/1357759 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 38601 event pairs, 712 based on Foata normal form. 1/5769 useless extension candidates. Maximal degree in co-relation 53272. Up to 4552 conditions per place. [2024-06-20 15:22:12,433 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 293 selfloop transitions, 422 changer transitions 0/722 dead transitions. [2024-06-20 15:22:12,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 722 transitions, 13154 flow [2024-06-20 15:22:12,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:22:12,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:22:12,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-20 15:22:12,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-20 15:22:12,434 INFO L175 Difference]: Start difference. First operand has 519 places, 698 transitions, 11076 flow. Second operand 9 states and 210 transitions. [2024-06-20 15:22:12,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 722 transitions, 13154 flow [2024-06-20 15:22:20,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 722 transitions, 12760 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-20 15:22:20,826 INFO L231 Difference]: Finished difference. Result has 518 places, 701 transitions, 11566 flow [2024-06-20 15:22:20,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10682, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=419, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11566, PETRI_PLACES=518, PETRI_TRANSITIONS=701} [2024-06-20 15:22:20,827 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 477 predicate places. [2024-06-20 15:22:20,827 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 701 transitions, 11566 flow [2024-06-20 15:22:20,827 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) [2024-06-20 15:22:20,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:20,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:20,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-20 15:22:20,827 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)] === [2024-06-20 15:22:20,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:20,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1795575162, now seen corresponding path program 24 times [2024-06-20 15:22:20,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:20,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786213335] [2024-06-20 15:22:20,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:20,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:20,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:20,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786213335] [2024-06-20 15:22:20,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786213335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:20,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:20,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:20,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500682437] [2024-06-20 15:22:20,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:20,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:20,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:20,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:20,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:21,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:21,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 701 transitions, 11566 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) [2024-06-20 15:22:21,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:21,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:21,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:22,399 INFO L124 PetriNetUnfolderBase]: 3497/5807 cut-off events. [2024-06-20 15:22:22,400 INFO L125 PetriNetUnfolderBase]: For 1389566/1389566 co-relation queries the response was YES. [2024-06-20 15:22:22,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54469 conditions, 5807 events. 3497/5807 cut-off events. For 1389566/1389566 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 38865 event pairs, 710 based on Foata normal form. 1/5793 useless extension candidates. Maximal degree in co-relation 54241. Up to 4567 conditions per place. [2024-06-20 15:22:22,510 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 293 selfloop transitions, 430 changer transitions 0/730 dead transitions. [2024-06-20 15:22:22,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 730 transitions, 14019 flow [2024-06-20 15:22:22,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:22:22,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:22:22,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-20 15:22:22,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:22:22,511 INFO L175 Difference]: Start difference. First operand has 518 places, 701 transitions, 11566 flow. Second operand 10 states and 230 transitions. [2024-06-20 15:22:22,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 730 transitions, 14019 flow [2024-06-20 15:22:31,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 730 transitions, 13430 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:31,202 INFO L231 Difference]: Finished difference. Result has 522 places, 707 transitions, 11944 flow [2024-06-20 15:22:31,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10983, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11944, PETRI_PLACES=522, PETRI_TRANSITIONS=707} [2024-06-20 15:22:31,203 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 481 predicate places. [2024-06-20 15:22:31,203 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 707 transitions, 11944 flow [2024-06-20 15:22:31,203 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) [2024-06-20 15:22:31,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:31,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:31,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-20 15:22:31,204 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)] === [2024-06-20 15:22:31,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:31,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1341756606, now seen corresponding path program 25 times [2024-06-20 15:22:31,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:31,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188897474] [2024-06-20 15:22:31,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:31,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:31,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:31,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188897474] [2024-06-20 15:22:31,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188897474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:31,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:31,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:31,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496603605] [2024-06-20 15:22:31,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:31,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:31,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:31,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:31,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:31,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:31,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 707 transitions, 11944 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) [2024-06-20 15:22:31,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:31,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:31,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:32,839 INFO L124 PetriNetUnfolderBase]: 3502/5847 cut-off events. [2024-06-20 15:22:32,840 INFO L125 PetriNetUnfolderBase]: For 1410123/1410123 co-relation queries the response was YES. [2024-06-20 15:22:32,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54818 conditions, 5847 events. 3502/5847 cut-off events. For 1410123/1410123 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 39385 event pairs, 623 based on Foata normal form. 1/5839 useless extension candidates. Maximal degree in co-relation 54588. Up to 5047 conditions per place. [2024-06-20 15:22:32,956 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 548 selfloop transitions, 179 changer transitions 0/734 dead transitions. [2024-06-20 15:22:32,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 734 transitions, 13801 flow [2024-06-20 15:22:32,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:22:32,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:22:32,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 279 transitions. [2024-06-20 15:22:32,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365384615384615 [2024-06-20 15:22:32,958 INFO L175 Difference]: Start difference. First operand has 522 places, 707 transitions, 11944 flow. Second operand 13 states and 279 transitions. [2024-06-20 15:22:32,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 734 transitions, 13801 flow [2024-06-20 15:22:42,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 734 transitions, 12919 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 15:22:42,652 INFO L231 Difference]: Finished difference. Result has 528 places, 710 transitions, 11487 flow [2024-06-20 15:22:42,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11068, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11487, PETRI_PLACES=528, PETRI_TRANSITIONS=710} [2024-06-20 15:22:42,653 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 487 predicate places. [2024-06-20 15:22:42,653 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 710 transitions, 11487 flow [2024-06-20 15:22:42,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:42,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:42,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:42,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-20 15:22:42,654 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)] === [2024-06-20 15:22:42,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:42,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1306413804, now seen corresponding path program 26 times [2024-06-20 15:22:42,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:42,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490438191] [2024-06-20 15:22:42,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:42,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:42,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:42,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490438191] [2024-06-20 15:22:42,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490438191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:42,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:42,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:42,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452056623] [2024-06-20 15:22:42,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:42,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:42,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:42,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:42,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:42,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:42,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 710 transitions, 11487 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) [2024-06-20 15:22:42,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:42,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:42,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:44,335 INFO L124 PetriNetUnfolderBase]: 3515/5863 cut-off events. [2024-06-20 15:22:44,335 INFO L125 PetriNetUnfolderBase]: For 1436350/1436350 co-relation queries the response was YES. [2024-06-20 15:22:44,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54610 conditions, 5863 events. 3515/5863 cut-off events. For 1436350/1436350 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 39434 event pairs, 632 based on Foata normal form. 1/5855 useless extension candidates. Maximal degree in co-relation 54379. Up to 5085 conditions per place. [2024-06-20 15:22:44,451 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 567 selfloop transitions, 165 changer transitions 0/739 dead transitions. [2024-06-20 15:22:44,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 739 transitions, 13412 flow [2024-06-20 15:22:44,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:22:44,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:22:44,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-20 15:22:44,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-20 15:22:44,453 INFO L175 Difference]: Start difference. First operand has 528 places, 710 transitions, 11487 flow. Second operand 12 states and 258 transitions. [2024-06-20 15:22:44,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 739 transitions, 13412 flow [2024-06-20 15:22:54,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 739 transitions, 13052 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-20 15:22:54,041 INFO L231 Difference]: Finished difference. Result has 531 places, 716 transitions, 11602 flow [2024-06-20 15:22:54,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11133, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11602, PETRI_PLACES=531, PETRI_TRANSITIONS=716} [2024-06-20 15:22:54,042 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 490 predicate places. [2024-06-20 15:22:54,046 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 716 transitions, 11602 flow [2024-06-20 15:22:54,046 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) [2024-06-20 15:22:54,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:54,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:54,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-20 15:22:54,047 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)] === [2024-06-20 15:22:54,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:54,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1434266048, now seen corresponding path program 27 times [2024-06-20 15:22:54,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:54,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336143601] [2024-06-20 15:22:54,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:54,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:54,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:54,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336143601] [2024-06-20 15:22:54,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336143601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:54,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:54,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:54,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661645396] [2024-06-20 15:22:54,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:54,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:54,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:54,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:54,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:54,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:54,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 716 transitions, 11602 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) [2024-06-20 15:22:54,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:54,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:54,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:56,042 INFO L124 PetriNetUnfolderBase]: 3512/5862 cut-off events. [2024-06-20 15:22:56,043 INFO L125 PetriNetUnfolderBase]: For 1445003/1445003 co-relation queries the response was YES. [2024-06-20 15:22:56,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54558 conditions, 5862 events. 3512/5862 cut-off events. For 1445003/1445003 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 39434 event pairs, 629 based on Foata normal form. 1/5854 useless extension candidates. Maximal degree in co-relation 54325. Up to 5093 conditions per place. [2024-06-20 15:22:56,144 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 577 selfloop transitions, 155 changer transitions 0/739 dead transitions. [2024-06-20 15:22:56,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 739 transitions, 13410 flow [2024-06-20 15:22:56,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:22:56,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:22:56,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-06-20 15:22:56,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5354166666666667 [2024-06-20 15:22:56,145 INFO L175 Difference]: Start difference. First operand has 531 places, 716 transitions, 11602 flow. Second operand 12 states and 257 transitions. [2024-06-20 15:22:56,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 739 transitions, 13410 flow [2024-06-20 15:23:05,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 739 transitions, 13048 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-20 15:23:05,303 INFO L231 Difference]: Finished difference. Result has 534 places, 716 transitions, 11556 flow [2024-06-20 15:23:05,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11240, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11556, PETRI_PLACES=534, PETRI_TRANSITIONS=716} [2024-06-20 15:23:05,303 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 493 predicate places. [2024-06-20 15:23:05,303 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 716 transitions, 11556 flow [2024-06-20 15:23:05,304 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) [2024-06-20 15:23:05,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:05,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:05,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-20 15:23:05,304 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)] === [2024-06-20 15:23:05,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:05,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1574635830, now seen corresponding path program 28 times [2024-06-20 15:23:05,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:05,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052844404] [2024-06-20 15:23:05,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:05,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:05,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:05,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052844404] [2024-06-20 15:23:05,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052844404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:05,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:05,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:23:05,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998132520] [2024-06-20 15:23:05,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:05,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:23:05,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:05,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:23:05,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:23:05,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:05,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 716 transitions, 11556 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) [2024-06-20 15:23:05,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:05,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:05,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:07,148 INFO L124 PetriNetUnfolderBase]: 3509/5858 cut-off events. [2024-06-20 15:23:07,149 INFO L125 PetriNetUnfolderBase]: For 1453044/1453044 co-relation queries the response was YES. [2024-06-20 15:23:07,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54461 conditions, 5858 events. 3509/5858 cut-off events. For 1453044/1453044 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 39433 event pairs, 629 based on Foata normal form. 1/5850 useless extension candidates. Maximal degree in co-relation 54227. Up to 5090 conditions per place. [2024-06-20 15:23:07,317 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 575 selfloop transitions, 155 changer transitions 0/737 dead transitions. [2024-06-20 15:23:07,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 737 transitions, 13066 flow [2024-06-20 15:23:07,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:23:07,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:23:07,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-20 15:23:07,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431818181818182 [2024-06-20 15:23:07,319 INFO L175 Difference]: Start difference. First operand has 534 places, 716 transitions, 11556 flow. Second operand 11 states and 239 transitions. [2024-06-20 15:23:07,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 737 transitions, 13066 flow [2024-06-20 15:23:16,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 737 transitions, 12658 flow, removed 19 selfloop flow, removed 13 redundant places. [2024-06-20 15:23:16,533 INFO L231 Difference]: Finished difference. Result has 532 places, 716 transitions, 11464 flow [2024-06-20 15:23:16,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11148, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11464, PETRI_PLACES=532, PETRI_TRANSITIONS=716} [2024-06-20 15:23:16,534 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 491 predicate places. [2024-06-20 15:23:16,534 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 716 transitions, 11464 flow [2024-06-20 15:23:16,534 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) [2024-06-20 15:23:16,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:16,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:16,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-20 15:23:16,535 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)] === [2024-06-20 15:23:16,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:16,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1082237304, now seen corresponding path program 29 times [2024-06-20 15:23:16,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:16,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623341795] [2024-06-20 15:23:16,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:16,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:16,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:16,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623341795] [2024-06-20 15:23:16,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623341795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:16,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:16,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:23:16,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334706655] [2024-06-20 15:23:16,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:16,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:23:16,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:16,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:23:16,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:23:16,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:16,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 716 transitions, 11464 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) [2024-06-20 15:23:16,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:16,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:16,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:18,354 INFO L124 PetriNetUnfolderBase]: 3522/5865 cut-off events. [2024-06-20 15:23:18,354 INFO L125 PetriNetUnfolderBase]: For 1484548/1484548 co-relation queries the response was YES. [2024-06-20 15:23:18,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54799 conditions, 5865 events. 3522/5865 cut-off events. For 1484548/1484548 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 39468 event pairs, 697 based on Foata normal form. 1/5851 useless extension candidates. Maximal degree in co-relation 54565. Up to 4597 conditions per place. [2024-06-20 15:23:18,453 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 286 selfloop transitions, 454 changer transitions 0/747 dead transitions. [2024-06-20 15:23:18,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 747 transitions, 14294 flow [2024-06-20 15:23:18,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:23:18,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:23:18,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-20 15:23:18,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5659090909090909 [2024-06-20 15:23:18,455 INFO L175 Difference]: Start difference. First operand has 532 places, 716 transitions, 11464 flow. Second operand 11 states and 249 transitions. [2024-06-20 15:23:18,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 747 transitions, 14294 flow [2024-06-20 15:23:27,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 747 transitions, 13972 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-20 15:23:27,678 INFO L231 Difference]: Finished difference. Result has 533 places, 722 transitions, 12172 flow [2024-06-20 15:23:27,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11142, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=448, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12172, PETRI_PLACES=533, PETRI_TRANSITIONS=722} [2024-06-20 15:23:27,679 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 492 predicate places. [2024-06-20 15:23:27,679 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 722 transitions, 12172 flow [2024-06-20 15:23:27,679 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) [2024-06-20 15:23:27,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:27,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:27,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-20 15:23:27,680 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)] === [2024-06-20 15:23:27,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:27,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1927816232, now seen corresponding path program 30 times [2024-06-20 15:23:27,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:27,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277283337] [2024-06-20 15:23:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:27,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:27,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:27,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277283337] [2024-06-20 15:23:27,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277283337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:27,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:27,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:23:27,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37802812] [2024-06-20 15:23:27,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:27,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:23:27,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:27,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:23:27,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:23:27,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:27,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 722 transitions, 12172 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) [2024-06-20 15:23:27,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:27,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:27,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:29,635 INFO L124 PetriNetUnfolderBase]: 3519/5873 cut-off events. [2024-06-20 15:23:29,636 INFO L125 PetriNetUnfolderBase]: For 1495170/1495170 co-relation queries the response was YES. [2024-06-20 15:23:29,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55469 conditions, 5873 events. 3519/5873 cut-off events. For 1495170/1495170 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 39524 event pairs, 632 based on Foata normal form. 1/5865 useless extension candidates. Maximal degree in co-relation 55234. Up to 5092 conditions per place. [2024-06-20 15:23:29,743 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 574 selfloop transitions, 165 changer transitions 0/746 dead transitions. [2024-06-20 15:23:29,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 746 transitions, 13706 flow [2024-06-20 15:23:29,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 15:23:29,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 15:23:29,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 293 transitions. [2024-06-20 15:23:29,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232142857142857 [2024-06-20 15:23:29,745 INFO L175 Difference]: Start difference. First operand has 533 places, 722 transitions, 12172 flow. Second operand 14 states and 293 transitions. [2024-06-20 15:23:29,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 746 transitions, 13706 flow [2024-06-20 15:23:39,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 746 transitions, 12452 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-20 15:23:39,475 INFO L231 Difference]: Finished difference. Result has 537 places, 722 transitions, 11254 flow [2024-06-20 15:23:39,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10918, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11254, PETRI_PLACES=537, PETRI_TRANSITIONS=722} [2024-06-20 15:23:39,476 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 496 predicate places. [2024-06-20 15:23:39,476 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 722 transitions, 11254 flow [2024-06-20 15:23:39,476 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) [2024-06-20 15:23:39,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:39,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:39,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-20 15:23:39,477 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)] === [2024-06-20 15:23:39,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:39,477 INFO L85 PathProgramCache]: Analyzing trace with hash 934643355, now seen corresponding path program 13 times [2024-06-20 15:23:39,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:39,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841664663] [2024-06-20 15:23:39,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:39,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:39,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:39,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841664663] [2024-06-20 15:23:39,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841664663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:39,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:39,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:39,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434355386] [2024-06-20 15:23:39,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:39,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:39,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:39,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:39,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:39,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:39,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 722 transitions, 11254 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) [2024-06-20 15:23:39,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:39,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:39,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:41,386 INFO L124 PetriNetUnfolderBase]: 3496/5843 cut-off events. [2024-06-20 15:23:41,387 INFO L125 PetriNetUnfolderBase]: For 1495912/1495912 co-relation queries the response was YES. [2024-06-20 15:23:41,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53060 conditions, 5843 events. 3496/5843 cut-off events. For 1495912/1495912 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 39347 event pairs, 468 based on Foata normal form. 10/5844 useless extension candidates. Maximal degree in co-relation 52825. Up to 4574 conditions per place. [2024-06-20 15:23:41,493 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 564 selfloop transitions, 190 changer transitions 0/761 dead transitions. [2024-06-20 15:23:41,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 761 transitions, 13210 flow [2024-06-20 15:23:41,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:41,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-20 15:23:41,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-20 15:23:41,494 INFO L175 Difference]: Start difference. First operand has 537 places, 722 transitions, 11254 flow. Second operand 8 states and 204 transitions. [2024-06-20 15:23:41,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 761 transitions, 13210 flow [2024-06-20 15:23:51,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 761 transitions, 12850 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-06-20 15:23:51,860 INFO L231 Difference]: Finished difference. Result has 532 places, 722 transitions, 11285 flow [2024-06-20 15:23:51,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10894, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11285, PETRI_PLACES=532, PETRI_TRANSITIONS=722} [2024-06-20 15:23:51,861 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 491 predicate places. [2024-06-20 15:23:51,861 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 722 transitions, 11285 flow [2024-06-20 15:23:51,861 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) [2024-06-20 15:23:51,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:51,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:51,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-20 15:23:51,861 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)] === [2024-06-20 15:23:51,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:51,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1007195051, now seen corresponding path program 14 times [2024-06-20 15:23:51,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:51,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266259679] [2024-06-20 15:23:51,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:51,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:51,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:51,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:51,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266259679] [2024-06-20 15:23:51,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266259679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:52,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:52,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:52,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852340213] [2024-06-20 15:23:52,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:52,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:52,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:52,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:52,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:52,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:52,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 722 transitions, 11285 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) [2024-06-20 15:23:52,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:52,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:52,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:53,634 INFO L124 PetriNetUnfolderBase]: 3473/5808 cut-off events. [2024-06-20 15:23:53,634 INFO L125 PetriNetUnfolderBase]: For 1407458/1407458 co-relation queries the response was YES. [2024-06-20 15:23:53,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51716 conditions, 5808 events. 3473/5808 cut-off events. For 1407458/1407458 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 39155 event pairs, 592 based on Foata normal form. 10/5807 useless extension candidates. Maximal degree in co-relation 51480. Up to 4943 conditions per place. [2024-06-20 15:23:53,735 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 579 selfloop transitions, 167 changer transitions 0/753 dead transitions. [2024-06-20 15:23:53,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 753 transitions, 12881 flow [2024-06-20 15:23:53,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:53,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:53,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:23:53,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-20 15:23:53,736 INFO L175 Difference]: Start difference. First operand has 532 places, 722 transitions, 11285 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:23:53,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 753 transitions, 12881 flow [2024-06-20 15:24:02,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 753 transitions, 12418 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-20 15:24:02,375 INFO L231 Difference]: Finished difference. Result has 531 places, 722 transitions, 11168 flow [2024-06-20 15:24:02,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10822, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11168, PETRI_PLACES=531, PETRI_TRANSITIONS=722} [2024-06-20 15:24:02,376 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 490 predicate places. [2024-06-20 15:24:02,376 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 722 transitions, 11168 flow [2024-06-20 15:24:02,376 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) [2024-06-20 15:24:02,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:02,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:02,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-20 15:24:02,376 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)] === [2024-06-20 15:24:02,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:02,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1230101565, now seen corresponding path program 15 times [2024-06-20 15:24:02,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:02,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627885794] [2024-06-20 15:24:02,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:02,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:02,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:02,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627885794] [2024-06-20 15:24:02,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627885794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:02,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:02,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:02,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850025030] [2024-06-20 15:24:02,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:02,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:02,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:02,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:02,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:02,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:24:02,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 722 transitions, 11168 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) [2024-06-20 15:24:02,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:02,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:24:02,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:04,136 INFO L124 PetriNetUnfolderBase]: 3450/5775 cut-off events. [2024-06-20 15:24:04,137 INFO L125 PetriNetUnfolderBase]: For 1274447/1274447 co-relation queries the response was YES. [2024-06-20 15:24:04,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49484 conditions, 5775 events. 3450/5775 cut-off events. For 1274447/1274447 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 38985 event pairs, 583 based on Foata normal form. 10/5774 useless extension candidates. Maximal degree in co-relation 49249. Up to 4904 conditions per place. [2024-06-20 15:24:04,239 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 576 selfloop transitions, 172 changer transitions 0/755 dead transitions. [2024-06-20 15:24:04,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 755 transitions, 12772 flow [2024-06-20 15:24:04,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:24:04,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:24:04,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-20 15:24:04,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925 [2024-06-20 15:24:04,240 INFO L175 Difference]: Start difference. First operand has 531 places, 722 transitions, 11168 flow. Second operand 10 states and 237 transitions. [2024-06-20 15:24:04,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 755 transitions, 12772 flow [2024-06-20 15:24:10,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 755 transitions, 12402 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-20 15:24:10,567 INFO L231 Difference]: Finished difference. Result has 532 places, 722 transitions, 11157 flow [2024-06-20 15:24:10,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10798, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11157, PETRI_PLACES=532, PETRI_TRANSITIONS=722} [2024-06-20 15:24:10,568 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 491 predicate places. [2024-06-20 15:24:10,568 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 722 transitions, 11157 flow [2024-06-20 15:24:10,568 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) [2024-06-20 15:24:10,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:10,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:10,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-20 15:24:10,570 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)] === [2024-06-20 15:24:10,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:10,570 INFO L85 PathProgramCache]: Analyzing trace with hash -224731045, now seen corresponding path program 16 times [2024-06-20 15:24:10,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:10,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129776832] [2024-06-20 15:24:10,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:10,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:10,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:10,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129776832] [2024-06-20 15:24:10,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129776832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:10,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:10,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:10,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569057217] [2024-06-20 15:24:10,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:10,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:10,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:10,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:10,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:10,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:24:10,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 722 transitions, 11157 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) [2024-06-20 15:24:10,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:10,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:24:10,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:12,444 INFO L124 PetriNetUnfolderBase]: 3577/5994 cut-off events. [2024-06-20 15:24:12,444 INFO L125 PetriNetUnfolderBase]: For 1609857/1609863 co-relation queries the response was YES. [2024-06-20 15:24:12,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50293 conditions, 5994 events. 3577/5994 cut-off events. For 1609857/1609863 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 40603 event pairs, 508 based on Foata normal form. 48/6039 useless extension candidates. Maximal degree in co-relation 50059. Up to 4911 conditions per place. [2024-06-20 15:24:12,552 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 661 selfloop transitions, 90 changer transitions 1/759 dead transitions. [2024-06-20 15:24:12,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 759 transitions, 12844 flow [2024-06-20 15:24:12,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:24:12,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:24:12,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-20 15:24:12,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6678571428571428 [2024-06-20 15:24:12,553 INFO L175 Difference]: Start difference. First operand has 532 places, 722 transitions, 11157 flow. Second operand 7 states and 187 transitions. [2024-06-20 15:24:12,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 759 transitions, 12844 flow [2024-06-20 15:24:21,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 759 transitions, 12492 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-20 15:24:21,391 INFO L231 Difference]: Finished difference. Result has 529 places, 723 transitions, 11053 flow [2024-06-20 15:24:21,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10805, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11053, PETRI_PLACES=529, PETRI_TRANSITIONS=723} [2024-06-20 15:24:21,391 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 488 predicate places. [2024-06-20 15:24:21,391 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 723 transitions, 11053 flow [2024-06-20 15:24:21,392 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) [2024-06-20 15:24:21,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:21,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:21,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-20 15:24:21,392 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)] === [2024-06-20 15:24:21,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:21,392 INFO L85 PathProgramCache]: Analyzing trace with hash 998013081, now seen corresponding path program 17 times [2024-06-20 15:24:21,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:21,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097731614] [2024-06-20 15:24:21,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:21,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:21,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:21,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097731614] [2024-06-20 15:24:21,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097731614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:21,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:21,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:21,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623426459] [2024-06-20 15:24:21,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:21,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:21,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:21,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:21,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:21,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:24:21,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 723 transitions, 11053 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) [2024-06-20 15:24:21,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:21,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:24:21,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:23,401 INFO L124 PetriNetUnfolderBase]: 3590/6012 cut-off events. [2024-06-20 15:24:23,402 INFO L125 PetriNetUnfolderBase]: For 1218738/1218744 co-relation queries the response was YES. [2024-06-20 15:24:23,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50277 conditions, 6012 events. 3590/6012 cut-off events. For 1218738/1218744 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 40786 event pairs, 608 based on Foata normal form. 14/6018 useless extension candidates. Maximal degree in co-relation 50043. Up to 5296 conditions per place. [2024-06-20 15:24:23,505 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 674 selfloop transitions, 77 changer transitions 0/758 dead transitions. [2024-06-20 15:24:23,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 758 transitions, 12705 flow [2024-06-20 15:24:23,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:23,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:23,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 15:24:23,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-06-20 15:24:23,506 INFO L175 Difference]: Start difference. First operand has 529 places, 723 transitions, 11053 flow. Second operand 8 states and 201 transitions. [2024-06-20 15:24:23,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 758 transitions, 12705 flow [2024-06-20 15:24:31,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 758 transitions, 12470 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-20 15:24:31,607 INFO L231 Difference]: Finished difference. Result has 531 places, 724 transitions, 11023 flow [2024-06-20 15:24:31,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10818, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11023, PETRI_PLACES=531, PETRI_TRANSITIONS=724} [2024-06-20 15:24:31,608 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 490 predicate places. [2024-06-20 15:24:31,608 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 724 transitions, 11023 flow [2024-06-20 15:24:31,608 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) [2024-06-20 15:24:31,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:31,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:31,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-20 15:24:31,608 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)] === [2024-06-20 15:24:31,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:31,609 INFO L85 PathProgramCache]: Analyzing trace with hash 2084414977, now seen corresponding path program 18 times [2024-06-20 15:24:31,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:31,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976964395] [2024-06-20 15:24:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:31,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:31,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:31,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976964395] [2024-06-20 15:24:31,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976964395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:31,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:31,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:31,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927816737] [2024-06-20 15:24:31,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:31,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:31,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:31,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:31,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:31,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:24:31,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 724 transitions, 11023 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) [2024-06-20 15:24:31,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:31,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:24:31,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:33,403 INFO L124 PetriNetUnfolderBase]: 3613/6049 cut-off events. [2024-06-20 15:24:33,403 INFO L125 PetriNetUnfolderBase]: For 1211628/1211634 co-relation queries the response was YES. [2024-06-20 15:24:33,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50124 conditions, 6049 events. 3613/6049 cut-off events. For 1211628/1211634 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 41066 event pairs, 611 based on Foata normal form. 14/6055 useless extension candidates. Maximal degree in co-relation 49890. Up to 5192 conditions per place. [2024-06-20 15:24:33,504 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 613 selfloop transitions, 142 changer transitions 0/762 dead transitions. [2024-06-20 15:24:33,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 762 transitions, 12693 flow [2024-06-20 15:24:33,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:33,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:33,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-20 15:24:33,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.646875 [2024-06-20 15:24:33,505 INFO L175 Difference]: Start difference. First operand has 531 places, 724 transitions, 11023 flow. Second operand 8 states and 207 transitions. [2024-06-20 15:24:33,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 762 transitions, 12693 flow [2024-06-20 15:24:42,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 762 transitions, 12494 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 15:24:42,380 INFO L231 Difference]: Finished difference. Result has 533 places, 725 transitions, 11161 flow [2024-06-20 15:24:42,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10824, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11161, PETRI_PLACES=533, PETRI_TRANSITIONS=725} [2024-06-20 15:24:42,381 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 492 predicate places. [2024-06-20 15:24:42,381 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 725 transitions, 11161 flow [2024-06-20 15:24:42,381 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) [2024-06-20 15:24:42,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:42,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:42,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-20 15:24:42,381 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)] === [2024-06-20 15:24:42,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:42,382 INFO L85 PathProgramCache]: Analyzing trace with hash -998751091, now seen corresponding path program 19 times [2024-06-20 15:24:42,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:42,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106789950] [2024-06-20 15:24:42,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:42,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:42,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:42,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106789950] [2024-06-20 15:24:42,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106789950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:42,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:42,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:42,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739322225] [2024-06-20 15:24:42,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:42,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:42,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:42,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:42,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:42,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:24:42,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 725 transitions, 11161 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) [2024-06-20 15:24:42,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:42,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:24:42,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:44,198 INFO L124 PetriNetUnfolderBase]: 3636/6091 cut-off events. [2024-06-20 15:24:44,198 INFO L125 PetriNetUnfolderBase]: For 1204737/1204743 co-relation queries the response was YES. [2024-06-20 15:24:44,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50373 conditions, 6091 events. 3636/6091 cut-off events. For 1204737/1204743 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 41397 event pairs, 480 based on Foata normal form. 14/6102 useless extension candidates. Maximal degree in co-relation 50138. Up to 4730 conditions per place. [2024-06-20 15:24:44,303 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 603 selfloop transitions, 159 changer transitions 0/769 dead transitions. [2024-06-20 15:24:44,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 769 transitions, 12899 flow [2024-06-20 15:24:44,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:44,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:44,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-20 15:24:44,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-06-20 15:24:44,304 INFO L175 Difference]: Start difference. First operand has 533 places, 725 transitions, 11161 flow. Second operand 8 states and 212 transitions. [2024-06-20 15:24:44,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 769 transitions, 12899 flow [2024-06-20 15:24:51,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 769 transitions, 12553 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-20 15:24:51,421 INFO L231 Difference]: Finished difference. Result has 532 places, 726 transitions, 11187 flow [2024-06-20 15:24:51,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10815, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11187, PETRI_PLACES=532, PETRI_TRANSITIONS=726} [2024-06-20 15:24:51,422 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 491 predicate places. [2024-06-20 15:24:51,422 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 726 transitions, 11187 flow [2024-06-20 15:24:51,422 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) [2024-06-20 15:24:51,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:51,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:51,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-20 15:24:51,422 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)] === [2024-06-20 15:24:51,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:51,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1230286263, now seen corresponding path program 3 times [2024-06-20 15:24:51,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:51,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45136855] [2024-06-20 15:24:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:51,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:51,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:51,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45136855] [2024-06-20 15:24:51,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45136855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:51,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:51,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:51,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071916176] [2024-06-20 15:24:51,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:51,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:51,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:51,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:51,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:51,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:24:51,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 726 transitions, 11187 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) [2024-06-20 15:24:51,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:51,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:24:51,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:53,310 INFO L124 PetriNetUnfolderBase]: 3631/6079 cut-off events. [2024-06-20 15:24:53,310 INFO L125 PetriNetUnfolderBase]: For 1068090/1068090 co-relation queries the response was YES. [2024-06-20 15:24:53,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49808 conditions, 6079 events. 3631/6079 cut-off events. For 1068090/1068090 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 41344 event pairs, 647 based on Foata normal form. 2/6072 useless extension candidates. Maximal degree in co-relation 49575. Up to 5410 conditions per place. [2024-06-20 15:24:53,413 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 666 selfloop transitions, 71 changer transitions 0/744 dead transitions. [2024-06-20 15:24:53,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 744 transitions, 12705 flow [2024-06-20 15:24:53,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:24:53,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:24:53,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-20 15:24:53,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-20 15:24:53,415 INFO L175 Difference]: Start difference. First operand has 532 places, 726 transitions, 11187 flow. Second operand 7 states and 162 transitions. [2024-06-20 15:24:53,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 744 transitions, 12705 flow [2024-06-20 15:25:02,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 744 transitions, 12346 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-20 15:25:02,357 INFO L231 Difference]: Finished difference. Result has 532 places, 726 transitions, 10981 flow [2024-06-20 15:25:02,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10828, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10981, PETRI_PLACES=532, PETRI_TRANSITIONS=726} [2024-06-20 15:25:02,357 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 491 predicate places. [2024-06-20 15:25:02,357 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 726 transitions, 10981 flow [2024-06-20 15:25:02,357 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) [2024-06-20 15:25:02,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:02,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:02,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-20 15:25:02,358 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)] === [2024-06-20 15:25:02,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:02,358 INFO L85 PathProgramCache]: Analyzing trace with hash 943224930, now seen corresponding path program 31 times [2024-06-20 15:25:02,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:02,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905880791] [2024-06-20 15:25:02,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:02,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:02,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:02,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905880791] [2024-06-20 15:25:02,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905880791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:02,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:02,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:25:02,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981885316] [2024-06-20 15:25:02,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:02,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:25:02,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:02,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:25:02,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:25:02,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:25:02,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 726 transitions, 10981 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) [2024-06-20 15:25:02,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:02,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:25:02,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:04,259 INFO L124 PetriNetUnfolderBase]: 3628/6068 cut-off events. [2024-06-20 15:25:04,259 INFO L125 PetriNetUnfolderBase]: For 1041529/1041529 co-relation queries the response was YES. [2024-06-20 15:25:04,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49034 conditions, 6068 events. 3628/6068 cut-off events. For 1041529/1041529 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 41226 event pairs, 669 based on Foata normal form. 1/6060 useless extension candidates. Maximal degree in co-relation 48801. Up to 4909 conditions per place. [2024-06-20 15:25:04,361 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 353 selfloop transitions, 396 changer transitions 0/756 dead transitions. [2024-06-20 15:25:04,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 756 transitions, 13145 flow [2024-06-20 15:25:04,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:25:04,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:25:04,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-20 15:25:04,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-20 15:25:04,363 INFO L175 Difference]: Start difference. First operand has 532 places, 726 transitions, 10981 flow. Second operand 9 states and 219 transitions. [2024-06-20 15:25:04,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 756 transitions, 13145 flow [2024-06-20 15:25:11,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 756 transitions, 12978 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:11,353 INFO L231 Difference]: Finished difference. Result has 536 places, 726 transitions, 11624 flow [2024-06-20 15:25:11,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10822, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11624, PETRI_PLACES=536, PETRI_TRANSITIONS=726} [2024-06-20 15:25:11,353 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 495 predicate places. [2024-06-20 15:25:11,354 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 726 transitions, 11624 flow [2024-06-20 15:25:11,354 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) [2024-06-20 15:25:11,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:11,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:11,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-20 15:25:11,354 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)] === [2024-06-20 15:25:11,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:11,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1722942463, now seen corresponding path program 4 times [2024-06-20 15:25:11,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:11,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479042455] [2024-06-20 15:25:11,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:11,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:11,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:11,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479042455] [2024-06-20 15:25:11,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479042455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:11,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:11,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:11,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210813694] [2024-06-20 15:25:11,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:11,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:11,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:11,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:11,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:11,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:25:11,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 726 transitions, 11624 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) [2024-06-20 15:25:11,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:11,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:25:11,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:13,196 INFO L124 PetriNetUnfolderBase]: 3649/6096 cut-off events. [2024-06-20 15:25:13,196 INFO L125 PetriNetUnfolderBase]: For 1064401/1064401 co-relation queries the response was YES. [2024-06-20 15:25:13,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50254 conditions, 6096 events. 3649/6096 cut-off events. For 1064401/1064401 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 41409 event pairs, 642 based on Foata normal form. 2/6087 useless extension candidates. Maximal degree in co-relation 50020. Up to 5412 conditions per place. [2024-06-20 15:25:13,300 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 676 selfloop transitions, 70 changer transitions 0/753 dead transitions. [2024-06-20 15:25:13,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 753 transitions, 13563 flow [2024-06-20 15:25:13,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:13,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-20 15:25:13,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-20 15:25:13,301 INFO L175 Difference]: Start difference. First operand has 536 places, 726 transitions, 11624 flow. Second operand 6 states and 147 transitions. [2024-06-20 15:25:13,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 753 transitions, 13563 flow [2024-06-20 15:25:20,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 753 transitions, 12939 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:25:20,781 INFO L231 Difference]: Finished difference. Result has 536 places, 731 transitions, 11262 flow [2024-06-20 15:25:20,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11002, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11262, PETRI_PLACES=536, PETRI_TRANSITIONS=731} [2024-06-20 15:25:20,782 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 495 predicate places. [2024-06-20 15:25:20,782 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 731 transitions, 11262 flow [2024-06-20 15:25:20,782 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) [2024-06-20 15:25:20,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:20,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:20,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-20 15:25:20,782 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)] === [2024-06-20 15:25:20,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:20,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1084866667, now seen corresponding path program 5 times [2024-06-20 15:25:20,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:20,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326732466] [2024-06-20 15:25:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:20,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:20,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:20,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:20,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326732466] [2024-06-20 15:25:20,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326732466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:20,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:20,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:20,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144632417] [2024-06-20 15:25:20,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:20,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:20,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:20,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:20,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:20,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:25:20,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 731 transitions, 11262 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) [2024-06-20 15:25:20,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:20,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:25:20,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:22,538 INFO L124 PetriNetUnfolderBase]: 3657/6115 cut-off events. [2024-06-20 15:25:22,538 INFO L125 PetriNetUnfolderBase]: For 1063274/1063274 co-relation queries the response was YES. [2024-06-20 15:25:22,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49830 conditions, 6115 events. 3657/6115 cut-off events. For 1063274/1063274 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 41573 event pairs, 651 based on Foata normal form. 2/6108 useless extension candidates. Maximal degree in co-relation 49594. Up to 5461 conditions per place. [2024-06-20 15:25:22,643 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 676 selfloop transitions, 67 changer transitions 0/750 dead transitions. [2024-06-20 15:25:22,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 750 transitions, 12838 flow [2024-06-20 15:25:22,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:22,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:22,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-20 15:25:22,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:25:22,644 INFO L175 Difference]: Start difference. First operand has 536 places, 731 transitions, 11262 flow. Second operand 6 states and 144 transitions. [2024-06-20 15:25:22,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 750 transitions, 12838 flow [2024-06-20 15:25:30,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 750 transitions, 12662 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-20 15:25:30,202 INFO L231 Difference]: Finished difference. Result has 540 places, 733 transitions, 11277 flow [2024-06-20 15:25:30,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11108, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11277, PETRI_PLACES=540, PETRI_TRANSITIONS=733} [2024-06-20 15:25:30,202 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 499 predicate places. [2024-06-20 15:25:30,202 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 733 transitions, 11277 flow [2024-06-20 15:25:30,203 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) [2024-06-20 15:25:30,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:30,203 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] [2024-06-20 15:25:30,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-20 15:25:30,203 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)] === [2024-06-20 15:25:30,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:30,203 INFO L85 PathProgramCache]: Analyzing trace with hash 943219350, now seen corresponding path program 32 times [2024-06-20 15:25:30,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:30,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968951751] [2024-06-20 15:25:30,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:30,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:30,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:30,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968951751] [2024-06-20 15:25:30,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968951751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:30,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:30,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:25:30,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330464835] [2024-06-20 15:25:30,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:30,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:25:30,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:30,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:25:30,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:25:30,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:25:30,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 733 transitions, 11277 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) [2024-06-20 15:25:30,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:30,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:25:30,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:32,087 INFO L124 PetriNetUnfolderBase]: 3654/6107 cut-off events. [2024-06-20 15:25:32,087 INFO L125 PetriNetUnfolderBase]: For 1054717/1054717 co-relation queries the response was YES. [2024-06-20 15:25:32,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49694 conditions, 6107 events. 3654/6107 cut-off events. For 1054717/1054717 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 41505 event pairs, 670 based on Foata normal form. 1/6099 useless extension candidates. Maximal degree in co-relation 49456. Up to 4949 conditions per place. [2024-06-20 15:25:32,192 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 361 selfloop transitions, 395 changer transitions 0/763 dead transitions. [2024-06-20 15:25:32,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 763 transitions, 13455 flow [2024-06-20 15:25:32,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:25:32,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:25:32,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-20 15:25:32,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-20 15:25:32,193 INFO L175 Difference]: Start difference. First operand has 540 places, 733 transitions, 11277 flow. Second operand 9 states and 219 transitions. [2024-06-20 15:25:32,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 763 transitions, 13455 flow [2024-06-20 15:25:39,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 763 transitions, 13296 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:39,822 INFO L231 Difference]: Finished difference. Result has 545 places, 733 transitions, 11918 flow [2024-06-20 15:25:39,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11118, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=395, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11918, PETRI_PLACES=545, PETRI_TRANSITIONS=733} [2024-06-20 15:25:39,823 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 504 predicate places. [2024-06-20 15:25:39,823 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 733 transitions, 11918 flow [2024-06-20 15:25:39,823 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) [2024-06-20 15:25:39,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:39,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:39,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-20 15:25:39,823 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)] === [2024-06-20 15:25:39,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:39,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2117172641, now seen corresponding path program 6 times [2024-06-20 15:25:39,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:39,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474952666] [2024-06-20 15:25:39,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:39,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:39,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:39,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474952666] [2024-06-20 15:25:39,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474952666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:39,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:39,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:39,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425871156] [2024-06-20 15:25:39,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:39,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:39,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:39,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:39,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:39,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:25:39,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 733 transitions, 11918 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) [2024-06-20 15:25:39,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:39,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:25:39,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:41,666 INFO L124 PetriNetUnfolderBase]: 3662/6136 cut-off events. [2024-06-20 15:25:41,666 INFO L125 PetriNetUnfolderBase]: For 1085878/1085889 co-relation queries the response was YES. [2024-06-20 15:25:41,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50668 conditions, 6136 events. 3662/6136 cut-off events. For 1085878/1085889 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 41850 event pairs, 582 based on Foata normal form. 10/6138 useless extension candidates. Maximal degree in co-relation 50429. Up to 5273 conditions per place. [2024-06-20 15:25:41,777 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 670 selfloop transitions, 82 changer transitions 0/759 dead transitions. [2024-06-20 15:25:41,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 759 transitions, 14175 flow [2024-06-20 15:25:41,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:41,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:41,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-20 15:25:41,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:25:41,778 INFO L175 Difference]: Start difference. First operand has 545 places, 733 transitions, 11918 flow. Second operand 6 states and 144 transitions. [2024-06-20 15:25:41,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 759 transitions, 14175 flow [2024-06-20 15:25:49,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 759 transitions, 13341 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 15:25:49,520 INFO L231 Difference]: Finished difference. Result has 544 places, 738 transitions, 11380 flow [2024-06-20 15:25:49,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11088, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11380, PETRI_PLACES=544, PETRI_TRANSITIONS=738} [2024-06-20 15:25:49,521 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 503 predicate places. [2024-06-20 15:25:49,521 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 738 transitions, 11380 flow [2024-06-20 15:25:49,521 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) [2024-06-20 15:25:49,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:49,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:49,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-20 15:25:49,522 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)] === [2024-06-20 15:25:49,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:49,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1429614699, now seen corresponding path program 7 times [2024-06-20 15:25:49,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:49,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408761607] [2024-06-20 15:25:49,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:49,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:49,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:49,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408761607] [2024-06-20 15:25:49,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408761607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:49,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:49,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:49,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623473951] [2024-06-20 15:25:49,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:49,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:49,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:49,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:49,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:49,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:25:49,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 738 transitions, 11380 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) [2024-06-20 15:25:49,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:49,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:25:49,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:51,393 INFO L124 PetriNetUnfolderBase]: 3670/6150 cut-off events. [2024-06-20 15:25:51,393 INFO L125 PetriNetUnfolderBase]: For 1083460/1083477 co-relation queries the response was YES. [2024-06-20 15:25:51,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50220 conditions, 6150 events. 3670/6150 cut-off events. For 1083460/1083477 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 42010 event pairs, 576 based on Foata normal form. 14/6157 useless extension candidates. Maximal degree in co-relation 49979. Up to 5378 conditions per place. [2024-06-20 15:25:51,525 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 673 selfloop transitions, 80 changer transitions 0/760 dead transitions. [2024-06-20 15:25:51,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 760 transitions, 12986 flow [2024-06-20 15:25:51,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:51,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-20 15:25:51,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-20 15:25:51,526 INFO L175 Difference]: Start difference. First operand has 544 places, 738 transitions, 11380 flow. Second operand 7 states and 162 transitions. [2024-06-20 15:25:51,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 760 transitions, 12986 flow [2024-06-20 15:25:59,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 760 transitions, 12737 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-20 15:25:59,829 INFO L231 Difference]: Finished difference. Result has 548 places, 740 transitions, 11352 flow [2024-06-20 15:25:59,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11157, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11352, PETRI_PLACES=548, PETRI_TRANSITIONS=740} [2024-06-20 15:25:59,830 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 507 predicate places. [2024-06-20 15:25:59,830 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 740 transitions, 11352 flow [2024-06-20 15:25:59,830 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) [2024-06-20 15:25:59,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:59,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:59,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-20 15:25:59,830 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)] === [2024-06-20 15:25:59,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:59,831 INFO L85 PathProgramCache]: Analyzing trace with hash -95294181, now seen corresponding path program 8 times [2024-06-20 15:25:59,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:59,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752177243] [2024-06-20 15:25:59,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:59,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:59,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:59,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752177243] [2024-06-20 15:25:59,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752177243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:59,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:59,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:59,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231944427] [2024-06-20 15:25:59,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:59,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:59,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:59,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:59,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:59,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:25:59,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 740 transitions, 11352 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) [2024-06-20 15:25:59,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:59,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:25:59,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:01,600 INFO L124 PetriNetUnfolderBase]: 3665/6141 cut-off events. [2024-06-20 15:26:01,600 INFO L125 PetriNetUnfolderBase]: For 1073746/1073763 co-relation queries the response was YES. [2024-06-20 15:26:01,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49768 conditions, 6141 events. 3665/6141 cut-off events. For 1073746/1073763 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 41917 event pairs, 662 based on Foata normal form. 14/6148 useless extension candidates. Maximal degree in co-relation 49526. Up to 5474 conditions per place. [2024-06-20 15:26:01,711 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 684 selfloop transitions, 64 changer transitions 0/755 dead transitions. [2024-06-20 15:26:01,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 755 transitions, 12884 flow [2024-06-20 15:26:01,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:01,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:01,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-20 15:26:01,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-20 15:26:01,712 INFO L175 Difference]: Start difference. First operand has 548 places, 740 transitions, 11352 flow. Second operand 7 states and 157 transitions. [2024-06-20 15:26:01,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 755 transitions, 12884 flow [2024-06-20 15:26:07,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 755 transitions, 12703 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 15:26:07,997 INFO L231 Difference]: Finished difference. Result has 550 places, 740 transitions, 11304 flow [2024-06-20 15:26:07,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11171, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11304, PETRI_PLACES=550, PETRI_TRANSITIONS=740} [2024-06-20 15:26:07,998 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 509 predicate places. [2024-06-20 15:26:07,998 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 740 transitions, 11304 flow [2024-06-20 15:26:07,998 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) [2024-06-20 15:26:07,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:07,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:07,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-20 15:26:07,999 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)] === [2024-06-20 15:26:07,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:07,999 INFO L85 PathProgramCache]: Analyzing trace with hash -809508621, now seen corresponding path program 9 times [2024-06-20 15:26:07,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:07,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793441294] [2024-06-20 15:26:07,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:07,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:08,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:08,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793441294] [2024-06-20 15:26:08,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793441294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:08,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:08,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:08,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288233658] [2024-06-20 15:26:08,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:08,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:08,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:08,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:08,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:08,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:26:08,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 740 transitions, 11304 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) [2024-06-20 15:26:08,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:08,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:26:08,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:09,857 INFO L124 PetriNetUnfolderBase]: 3660/6130 cut-off events. [2024-06-20 15:26:09,858 INFO L125 PetriNetUnfolderBase]: For 1064061/1064078 co-relation queries the response was YES. [2024-06-20 15:26:09,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49379 conditions, 6130 events. 3660/6130 cut-off events. For 1064061/1064078 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 41792 event pairs, 655 based on Foata normal form. 14/6133 useless extension candidates. Maximal degree in co-relation 49136. Up to 5447 conditions per place. [2024-06-20 15:26:09,967 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 681 selfloop transitions, 69 changer transitions 0/757 dead transitions. [2024-06-20 15:26:09,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 757 transitions, 12844 flow [2024-06-20 15:26:09,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:09,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:09,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-20 15:26:09,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 15:26:09,969 INFO L175 Difference]: Start difference. First operand has 550 places, 740 transitions, 11304 flow. Second operand 8 states and 176 transitions. [2024-06-20 15:26:09,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 757 transitions, 12844 flow [2024-06-20 15:26:17,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 757 transitions, 12697 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 15:26:17,327 INFO L231 Difference]: Finished difference. Result has 553 places, 740 transitions, 11300 flow [2024-06-20 15:26:17,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11157, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11300, PETRI_PLACES=553, PETRI_TRANSITIONS=740} [2024-06-20 15:26:17,328 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 512 predicate places. [2024-06-20 15:26:17,328 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 740 transitions, 11300 flow [2024-06-20 15:26:17,328 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) [2024-06-20 15:26:17,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:17,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:17,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-20 15:26:17,328 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)] === [2024-06-20 15:26:17,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:17,329 INFO L85 PathProgramCache]: Analyzing trace with hash -818086104, now seen corresponding path program 33 times [2024-06-20 15:26:17,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:17,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063068137] [2024-06-20 15:26:17,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:17,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:17,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:17,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063068137] [2024-06-20 15:26:17,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063068137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:17,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:17,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:26:17,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276275454] [2024-06-20 15:26:17,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:17,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:26:17,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:17,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:26:17,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:26:17,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:26:17,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 740 transitions, 11300 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) [2024-06-20 15:26:17,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:17,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:26:17,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:19,238 INFO L124 PetriNetUnfolderBase]: 3665/6143 cut-off events. [2024-06-20 15:26:19,239 INFO L125 PetriNetUnfolderBase]: For 1066115/1066132 co-relation queries the response was YES. [2024-06-20 15:26:19,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49528 conditions, 6143 events. 3665/6143 cut-off events. For 1066115/1066132 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 41904 event pairs, 679 based on Foata normal form. 13/6149 useless extension candidates. Maximal degree in co-relation 49284. Up to 4965 conditions per place. [2024-06-20 15:26:19,351 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 369 selfloop transitions, 397 changer transitions 0/773 dead transitions. [2024-06-20 15:26:19,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 773 transitions, 13874 flow [2024-06-20 15:26:19,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:26:19,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:26:19,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-20 15:26:19,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:26:19,352 INFO L175 Difference]: Start difference. First operand has 553 places, 740 transitions, 11300 flow. Second operand 11 states and 253 transitions. [2024-06-20 15:26:19,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 773 transitions, 13874 flow [2024-06-20 15:26:26,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 773 transitions, 13729 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 15:26:26,234 INFO L231 Difference]: Finished difference. Result has 558 places, 743 transitions, 12013 flow [2024-06-20 15:26:26,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11155, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12013, PETRI_PLACES=558, PETRI_TRANSITIONS=743} [2024-06-20 15:26:26,235 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 517 predicate places. [2024-06-20 15:26:26,235 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 743 transitions, 12013 flow [2024-06-20 15:26:26,235 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) [2024-06-20 15:26:26,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:26,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:26,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-20 15:26:26,236 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)] === [2024-06-20 15:26:26,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:26,236 INFO L85 PathProgramCache]: Analyzing trace with hash -805187934, now seen corresponding path program 34 times [2024-06-20 15:26:26,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:26,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405063462] [2024-06-20 15:26:26,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:26,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:26,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:26,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405063462] [2024-06-20 15:26:26,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405063462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:26,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:26,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:26:26,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6906831] [2024-06-20 15:26:26,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:26,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:26:26,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:26,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:26:26,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:26:26,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:26:26,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 743 transitions, 12013 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) [2024-06-20 15:26:26,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:26,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:26:26,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:28,163 INFO L124 PetriNetUnfolderBase]: 3670/6152 cut-off events. [2024-06-20 15:26:28,164 INFO L125 PetriNetUnfolderBase]: For 1083177/1083194 co-relation queries the response was YES. [2024-06-20 15:26:28,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50453 conditions, 6152 events. 3670/6152 cut-off events. For 1083177/1083194 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 41992 event pairs, 681 based on Foata normal form. 13/6158 useless extension candidates. Maximal degree in co-relation 50208. Up to 4971 conditions per place. [2024-06-20 15:26:28,278 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 366 selfloop transitions, 403 changer transitions 0/776 dead transitions. [2024-06-20 15:26:28,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 776 transitions, 14299 flow [2024-06-20 15:26:28,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:26:28,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:26:28,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 267 transitions. [2024-06-20 15:26:28,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-20 15:26:28,279 INFO L175 Difference]: Start difference. First operand has 558 places, 743 transitions, 12013 flow. Second operand 12 states and 267 transitions. [2024-06-20 15:26:28,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 776 transitions, 14299 flow [2024-06-20 15:26:36,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 776 transitions, 13249 flow, removed 53 selfloop flow, removed 10 redundant places. [2024-06-20 15:26:36,299 INFO L231 Difference]: Finished difference. Result has 560 places, 746 transitions, 11839 flow [2024-06-20 15:26:36,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10999, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11839, PETRI_PLACES=560, PETRI_TRANSITIONS=746} [2024-06-20 15:26:36,303 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 519 predicate places. [2024-06-20 15:26:36,303 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 746 transitions, 11839 flow [2024-06-20 15:26:36,303 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) [2024-06-20 15:26:36,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:36,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:36,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-20 15:26:36,304 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:36,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:36,304 INFO L85 PathProgramCache]: Analyzing trace with hash -95289624, now seen corresponding path program 35 times [2024-06-20 15:26:36,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:36,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819763520] [2024-06-20 15:26:36,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:36,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:36,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:36,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819763520] [2024-06-20 15:26:36,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819763520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:36,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:36,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:26:36,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363703562] [2024-06-20 15:26:36,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:36,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:26:36,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:36,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:26:36,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:26:36,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:26:36,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 746 transitions, 11839 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) [2024-06-20 15:26:36,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:36,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:26:36,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:38,396 INFO L124 PetriNetUnfolderBase]: 3667/6148 cut-off events. [2024-06-20 15:26:38,397 INFO L125 PetriNetUnfolderBase]: For 1083053/1083070 co-relation queries the response was YES. [2024-06-20 15:26:38,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49960 conditions, 6148 events. 3667/6148 cut-off events. For 1083053/1083070 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 42048 event pairs, 679 based on Foata normal form. 13/6154 useless extension candidates. Maximal degree in co-relation 49715. Up to 4968 conditions per place. [2024-06-20 15:26:38,524 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 369 selfloop transitions, 401 changer transitions 0/777 dead transitions. [2024-06-20 15:26:38,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 777 transitions, 14069 flow [2024-06-20 15:26:38,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:26:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:26:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 288 transitions. [2024-06-20 15:26:38,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5538461538461539 [2024-06-20 15:26:38,525 INFO L175 Difference]: Start difference. First operand has 560 places, 746 transitions, 11839 flow. Second operand 13 states and 288 transitions. [2024-06-20 15:26:38,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 777 transitions, 14069 flow [2024-06-20 15:26:45,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 777 transitions, 13376 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-20 15:26:45,555 INFO L231 Difference]: Finished difference. Result has 564 places, 746 transitions, 11954 flow [2024-06-20 15:26:45,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11146, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=401, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11954, PETRI_PLACES=564, PETRI_TRANSITIONS=746} [2024-06-20 15:26:45,556 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 523 predicate places. [2024-06-20 15:26:45,556 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 746 transitions, 11954 flow [2024-06-20 15:26:45,556 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) [2024-06-20 15:26:45,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:45,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:45,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-20 15:26:45,557 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:45,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:45,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1362746198, now seen corresponding path program 36 times [2024-06-20 15:26:45,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:45,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977568125] [2024-06-20 15:26:45,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:45,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:45,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:45,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:45,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977568125] [2024-06-20 15:26:45,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977568125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:45,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:45,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:26:45,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587551792] [2024-06-20 15:26:45,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:45,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:26:45,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:45,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:26:45,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:26:45,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:26:45,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 746 transitions, 11954 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) [2024-06-20 15:26:45,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:45,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:26:45,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:47,558 INFO L124 PetriNetUnfolderBase]: 3664/6134 cut-off events. [2024-06-20 15:26:47,559 INFO L125 PetriNetUnfolderBase]: For 1082135/1082135 co-relation queries the response was YES. [2024-06-20 15:26:47,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49901 conditions, 6134 events. 3664/6134 cut-off events. For 1082135/1082135 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 41834 event pairs, 662 based on Foata normal form. 1/6126 useless extension candidates. Maximal degree in co-relation 49655. Up to 4965 conditions per place. [2024-06-20 15:26:47,677 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 371 selfloop transitions, 405 changer transitions 0/783 dead transitions. [2024-06-20 15:26:47,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 783 transitions, 14834 flow [2024-06-20 15:26:47,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 15:26:47,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 15:26:47,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 320 transitions. [2024-06-20 15:26:47,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 15:26:47,678 INFO L175 Difference]: Start difference. First operand has 564 places, 746 transitions, 11954 flow. Second operand 14 states and 320 transitions. [2024-06-20 15:26:47,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 783 transitions, 14834 flow [2024-06-20 15:26:57,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 783 transitions, 13883 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-20 15:26:57,426 INFO L231 Difference]: Finished difference. Result has 565 places, 746 transitions, 11827 flow [2024-06-20 15:26:57,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11003, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=405, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11827, PETRI_PLACES=565, PETRI_TRANSITIONS=746} [2024-06-20 15:26:57,427 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 524 predicate places. [2024-06-20 15:26:57,427 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 746 transitions, 11827 flow [2024-06-20 15:26:57,427 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) [2024-06-20 15:26:57,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:57,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:57,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-20 15:26:57,427 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:57,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:57,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1230112260, now seen corresponding path program 37 times [2024-06-20 15:26:57,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:57,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818133838] [2024-06-20 15:26:57,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:57,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:57,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:57,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818133838] [2024-06-20 15:26:57,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818133838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:57,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:57,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:26:57,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955169709] [2024-06-20 15:26:57,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:57,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:26:57,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:57,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:26:57,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:26:57,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:26:57,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 746 transitions, 11827 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) [2024-06-20 15:26:57,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:57,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:26:57,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:59,238 INFO L124 PetriNetUnfolderBase]: 3661/6123 cut-off events. [2024-06-20 15:26:59,238 INFO L125 PetriNetUnfolderBase]: For 1081706/1081706 co-relation queries the response was YES. [2024-06-20 15:26:59,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49743 conditions, 6123 events. 3661/6123 cut-off events. For 1081706/1081706 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 41723 event pairs, 672 based on Foata normal form. 1/6115 useless extension candidates. Maximal degree in co-relation 49496. Up to 4962 conditions per place. [2024-06-20 15:26:59,347 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 365 selfloop transitions, 406 changer transitions 0/778 dead transitions. [2024-06-20 15:26:59,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 778 transitions, 14071 flow [2024-06-20 15:26:59,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:26:59,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:26:59,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 262 transitions. [2024-06-20 15:26:59,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5954545454545455 [2024-06-20 15:26:59,349 INFO L175 Difference]: Start difference. First operand has 565 places, 746 transitions, 11827 flow. Second operand 11 states and 262 transitions. [2024-06-20 15:26:59,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 778 transitions, 14071 flow [2024-06-20 15:27:08,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 778 transitions, 13124 flow, removed 23 selfloop flow, removed 13 redundant places. [2024-06-20 15:27:08,381 INFO L231 Difference]: Finished difference. Result has 563 places, 746 transitions, 11714 flow [2024-06-20 15:27:08,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10888, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=406, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11714, PETRI_PLACES=563, PETRI_TRANSITIONS=746} [2024-06-20 15:27:08,382 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 522 predicate places. [2024-06-20 15:27:08,382 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 746 transitions, 11714 flow [2024-06-20 15:27:08,382 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) [2024-06-20 15:27:08,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:08,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:08,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-20 15:27:08,383 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:08,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:08,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1020471540, now seen corresponding path program 38 times [2024-06-20 15:27:08,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:08,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553080391] [2024-06-20 15:27:08,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:08,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:08,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:08,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553080391] [2024-06-20 15:27:08,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553080391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:08,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:08,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:27:08,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980833344] [2024-06-20 15:27:08,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:08,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:27:08,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:08,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:27:08,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:27:08,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:27:08,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 746 transitions, 11714 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) [2024-06-20 15:27:08,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:08,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:27:08,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:10,370 INFO L124 PetriNetUnfolderBase]: 3666/6139 cut-off events. [2024-06-20 15:27:10,371 INFO L125 PetriNetUnfolderBase]: For 1067835/1067835 co-relation queries the response was YES. [2024-06-20 15:27:10,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49670 conditions, 6139 events. 3666/6139 cut-off events. For 1067835/1067835 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 41836 event pairs, 662 based on Foata normal form. 1/6131 useless extension candidates. Maximal degree in co-relation 49424. Up to 4968 conditions per place. [2024-06-20 15:27:10,488 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 369 selfloop transitions, 408 changer transitions 0/784 dead transitions. [2024-06-20 15:27:10,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 784 transitions, 14653 flow [2024-06-20 15:27:10,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:27:10,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:27:10,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 280 transitions. [2024-06-20 15:27:10,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-20 15:27:10,489 INFO L175 Difference]: Start difference. First operand has 563 places, 746 transitions, 11714 flow. Second operand 12 states and 280 transitions. [2024-06-20 15:27:10,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 784 transitions, 14653 flow [2024-06-20 15:27:19,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 784 transitions, 13817 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-20 15:27:19,738 INFO L231 Difference]: Finished difference. Result has 564 places, 749 transitions, 11777 flow [2024-06-20 15:27:19,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10892, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=405, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11777, PETRI_PLACES=564, PETRI_TRANSITIONS=749} [2024-06-20 15:27:19,739 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 523 predicate places. [2024-06-20 15:27:19,739 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 749 transitions, 11777 flow [2024-06-20 15:27:19,739 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) [2024-06-20 15:27:19,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:19,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:19,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-20 15:27:19,739 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:19,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:19,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1230458220, now seen corresponding path program 39 times [2024-06-20 15:27:19,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:19,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965559440] [2024-06-20 15:27:19,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:19,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:19,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:19,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965559440] [2024-06-20 15:27:19,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965559440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:19,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:19,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:27:19,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073204824] [2024-06-20 15:27:19,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:19,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:27:19,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:19,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:27:19,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:27:19,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:27:19,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 749 transitions, 11777 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) [2024-06-20 15:27:19,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:19,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:27:19,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:21,845 INFO L124 PetriNetUnfolderBase]: 3663/6132 cut-off events. [2024-06-20 15:27:21,846 INFO L125 PetriNetUnfolderBase]: For 1056037/1056037 co-relation queries the response was YES. [2024-06-20 15:27:21,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49489 conditions, 6132 events. 3663/6132 cut-off events. For 1056037/1056037 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 41832 event pairs, 668 based on Foata normal form. 1/6124 useless extension candidates. Maximal degree in co-relation 49243. Up to 4965 conditions per place. [2024-06-20 15:27:21,963 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 363 selfloop transitions, 416 changer transitions 0/786 dead transitions. [2024-06-20 15:27:21,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 786 transitions, 14353 flow [2024-06-20 15:27:21,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-20 15:27:21,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-20 15:27:21,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 334 transitions. [2024-06-20 15:27:21,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5566666666666666 [2024-06-20 15:27:21,965 INFO L175 Difference]: Start difference. First operand has 564 places, 749 transitions, 11777 flow. Second operand 15 states and 334 transitions. [2024-06-20 15:27:21,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 786 transitions, 14353 flow Killed by 15